Manual of U.S. Patent Classification
as of June 30, 2000

Class
423
CHEMISTRY OF INORGANIC COMPOUNDS

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Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> CHEMISTRY OF INORGANIC COMPOUNDS
700		ZEOLITE
701		. Organic compound used to form zeolite
702		. . Organic template used
703		. . . Mixed template
704		. . . Nitrogen containing
705		. . . . Amine
706		. . . . . Cyclic
707		. . . . . Hydroxyl
708		. . . . . Diamine
709		. Seed used
710		. Aging to induce zeolite formation from inorganic mixture
711		. . With physical treatment
712		. Synthesized from naturally occurring product
713		. Isomorphic metal substitution
714		. . Acid treatment
715		. . . Halogen containing acid
716		. With change of synthesized zeolite morphology
717		. . Physical treatment
718		. Structure defined X-ray diffraction pattern
1		TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND
2		. Radioactive metal (At. No. 84+ or radioactive isotope of another metal)
3		. . Actinide series metal (At. No. 89+)
4		. . . Removing cladding or coating from fuel element
5		. . . Fusing
6		. . . Ion exchanging or sorbing
7		. . . . Organic synthetic resin
8		. . . Liquid-liquid extracting
9		. . . . Organo-nitrogen solvent
10		. . . . Organo-phosphorus solvent
11		. . . Forming insoluble substance in liquid
12		. . . . By coprecipitating with carrier
13		. . . . . Carrier contains bismuth
14		. . . . . Carrier contains lanthanum
15		. . . . Forming compound containing plural metals or metal and ammonium
16		. . . . Forming peroxide (e.g., U04, etc.)
17		. . . . Carbonate leaching
18		. . . . Acid leaching
19		. . . Volatizing
20		. . . Acid leaching
21.1		. Rare earth metal (At. No. 21, 39, or 57-71)
21.5		. . Ion exchanging or liquid-liquid extracting
22		. Platinum group metal (Ru, Rh, Pd, Os, Ir, or Pt)
23		. Group IB metal (Cu, Ag, or Au)
24		. . Ion exchanging or liquid-liquid extracting
25		. . Sorbing or magnetic separating
26		. . Flotation
27		. . Leaching, washing, or dissolving
28		. . . Specified particle size
29		. . . With a cyanide compound
30		. . . . And pressurizing
31		. . . . And agitating
32		. . . With ammonia or ammonium containing compound
33		. . . . Specified temperature
34		. . . Forming insoluble substance in liquid
35		. . . . Forming oxide or carbonate
36		. . . . Sulfating
37		. . . . Sulfiding
38		. . . Halogenating
39		. . . . Specified temperature
40		. . . . With chlorine gas or chlorinated water
41		. . . Sulfating
42		. . Forming insoluble substance in liquid
43		. . . Specified pH
44		. . Volatizing copper, silver, or gold
45		. . Sulfating
46		. . Halogenating
47		. . Desulfurizing or de-arsenating
48		. . Forming sulfide or matte
49		. Group VIIB metal (Mn, Tc, or Re)
50		. . Forming insoluble substance in liquid
51		. . . Halogenating
52		. . . Sulfating
53		. Group VIB metal (Cr, Mo, or W)
54		. . Ion exchanging or liquid-liquid extracting
55		. . Forming insoluble substance in liquid
56		. . . Ammoniating or nitrating
57		. . . Sulfating
58		. . . Forming compound containing plural metals
59		. . Volatizing
60		. . . As a compound containing chlorine
61		. . Forming compound containing plural metals
62		. Group VB metal (V, Nb, or Ta)
63		. . Ion exchanging or liquid-liquid extracting
64		. . From organic liquids
65		. . Forming insoluble substance in liquid
66		. . . Hydroxylating or hydrating
67		. . . Ammoniating or sulfating
68		. . Leaching, washing, or dissolving
69		. Group IVB metal (Ti, Zr, or Hf)
70		. . Ion exchanging or liquid-liquid extracting
71		. . Forming compound containing plural metals
72		. . . Halogen containing
73		. . Separating Group IVB metals from each other
74		. . Utilizing fluidized bed
75		. . Volatizing
76		. . . Titanium, zirconium, or hafnium
77		. . . . Removing undesirable matter from vapor
78		. . . . Specified physical form of feed solids
79		. . . . Contacting feed solids with chlorine gas
80		. . Chemically converting for physical solid-solid separation
81		. . Treating with nitrogen or nitrogenous compound
82		. . Treating with sulfur or halogen containing acid
83		. . . Forming metallic iron or insoluble iron containing compound
84		. . Treating with compound containing alkali metal or alkaline earth metal
85		. . Forming insoluble compound containing Group IVB metal
86		. . Dissolving or leaching of iron
87		. Group VA metal or arsenic (Sb, Bi, or As)
88		. . Volatizing
89		. Group IVA metal (Ge, Sn, or Pb)
90		. . Detinning
91		. . . Treating with free halogen or hydrogen halide
92		. . Forming insoluble substance in liquid
93		. . . Pressurizing or agitating during reaction
94		. . . Halogenating
95		. . . Nitrating or sulfating
96		. . Volatizing germanium or tin
97		. . Volatizing lead
98		. . Leaching, washing, or dissolving
99		. Group IIB metal (Zn, Cd, or Hg)
100		. . Ion exchanging or magnetic separating
101		. . Forming insoluble substance in liquid
102		. . . Agitating during reaction
103		. . . Halogenating
104		. . . Hydroxylating or hydrating
105		. . . Carbonating
106		. . . Sulfating
107		. . Volatizing zinc, cadmium, or mercury
108		. . . Mixture contains lead
109		. . Leaching, washing, or dissolving
110		. . Desulfurizing
111		. Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be)
112		. . Ion exchanging or liquid-liquid extracting
113		. . Magnetic separating
114		. . Forming compound containing ammonium and metal
115		. . Forming compound containing plural metals
116		. . . And halogen
117		. . . And sulfur
118.1		. . . Aluminosilicate other than zeolite
119		. . . Alkali metal aluminate
120		. . . . From alunite
121		. . . . From bauxite
122		. . Forming insoluble substance in liquid
123		. . . Subjecting mixture to pressure, vacuum, or steam
124		. . . Agitating during reaction
125		. . . Nitrating
126		. . . Halogenating
127		. . . Hydroxylating or hydrating
128		. . . Sulfating
129		. . . Carbonating
130		. . Destroying or separating organic impurity
131		. . Leaching, washing, or dissolving
132		. . . With acid
133		. . Volatizing
134		. . . Beryllium
135		. . . Group IIIA metal
136		. . . . Utilizing elemental halogen as reactant
137		. . Utilizing carbon as reducing agent
138		. Iron group metal (Fe, Co, or Ni)
139		. . Ion exchanging or liquid-liquid extracting
140		. . Forming insoluble substance in liquid
141		. . . Subjecting mixture to pressure, vacuum, or steam
142		. . . Agitating during reaction
143		. . . Utilizing or forming nitrogenous compound
144		. . . . Carbonating, hydroxylating, or hydrating
145		. . . . Sulfating
146		. . . Sulfating
147		. . . . Halogenating, hydroxylating, or hydrating
148		. . Utilizing fluidized bed
149		. . Volatizing iron, nickel, or cobalt
150.1		. . Leaching, washing, or dissolving
150.2		. . . Spent catalyst
150.3		. . . Treatment of iron containing waste mixture
150.4		. . . Treatment of matte or nodule
150.5		. . . . Gas injected into mixture
150.6		. . . . With electrolytic or magnetic separation
151		. . Converting metal to magnetic form
152		. . . At specified temperature
153		. . Desulfurizing
154		. . . At specified temperature
155		. Alkaline earth metal (Mg, Ca, Sr, or Ba)
156		. . Magnetic separating
157		. . Ion exchanging or liquid-liquid extracting
157.2		. . Phosphate rock or ore
157.3		. . . Acid treatment
157.4		. . . . Sulfating
157.5		. . Phosphorous or phosphorous compound containing waste as feed
158		. . Forming insoluble substance in liquid
159		. . . Subjecting mixture to pressure, vacuum, or steam
160		. . . Agitating during reaction
161		. . . Specified particle size used or made
162		. . . Nitrating or ammoniating
163		. . . Halogenating
164		. . . Hydroxylating or hydrating
165		. . . Carbonating
166		. . . Sulfating
167.1		. . Treating asbestos
168		. . Mixing fuel with starting mixture
169		. . Separating magnesium and calcium from each other (e.g., treating dolomite, etc.)
170		. . Treating impure sulfate (e.g., barite, etc.)
171		. . . Calcining gypsum
172		. . . . With steam or at specified temperature
173		. . Treating impure carbonate (e.g., oyster shells, etc.)
174		. . . Forming calcium carbide
175		. . . Calcining
176		. . . . Utilizing vacuum or steam
177		. . . . With agitating or at specified temperature
178		. . Mixture contains halogen or sulfur
179		. Alkali metal (Li, Na, K, Rb, or Cs)
179.5		. . Lithium
180		. . Decomposing amalgam or other alloy
181		. . Ion exchanging or liquid-liquid extracting
182		. . Regenerating solution
183		. . . Hydroxide solution
184		. . Forming insoluble substance in liquid
185		. . . Fluorinating or defluorinating
186		. . . Carbonating
187		. . . . Utilizing or forming nitrogenous compound
188		. . . . Subjecting mixture to pressure, vacuum, or steam
189		. . . . Utilizing carbon dioxide as reactant
190		. . . . . Mixture contains metal chloride
191		. . . . Halogenating
192		. . . . Hydroxylating or hydrating
193		. . . . Sulfating
194		. . . Utilizing or forming nitrogenous compound
195		. . . Subjecting mixture to pressure, vacuum, or steam
196		. . . Agitating during reaction
197		. . . Halogenating
198		. . . Hydroxylating or hydrating
199		. . . Sulfating
200		. . Volatizing an alkali metal
201		. . Agitating during heating or reaction
202		. . Treating with acid or acid salt
203		. . Subjecting mixture to pressure, vacuum, or steam
204		. . . Mixture contains organic impurity
205		. . . Leaching or forming water soluble substance
206.1		. . Mixture contains organic or carbonaceous impurity
206.2		. . . Alkali carbonate from trona
207		. . . Burning the impurity
208		. . Water leaching or forming water soluble substance
209		. . Carbonating
210		MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE
210.5		. Direct contact with molten material
212		. Mixture is exhaust from internal-combustion engine
213.2		. . Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element
213.5		. . . Group VIII element
213.7		. . . Including successive stage treatments to modify or remove a different component in each stage
219		. Molecular oxygen or ozone component
220		. Carbon dioxide or hydrogen sulfide component
221		. . Utilizing thionate or thiosulfate as reactant
222		. . Reacting mixture with sulfur dioxide, sulfite, or bisulfite
223		. . Utilizing reactant containing arsenic, phosphorus, or boron
224		. . By oxidizing or burning component
225		. . By suspension of metal oxide or hydroxide particles in liquid
226		. . Utilizing organic reactant
227		. . . Phenolate or phenolic type
228		. . . Amine
229		. . . . Ethanolamine
230		. . Utilizing solid sorbent, catalyst, or reactant
231		. . . Iron oxide or hydroxide
232		. . Utilizing carbonate as reactant
233		. . . And regenerating reactant by incoming actifying gas
234		. . Utilizing ammonium or metal hydroxide solution
235		. Nitrogen or nitrogenous component
236		. . Component also contains carbon (e.g., cyanogen, hydrogen cyanide, etc.)
237		. . Ammonia
238		. . . Utilizing liquid as reactant
239.1		. . Utilizing solid sorbent, catalyst, or reactant
239.2		. . . Zeolite
240R		. Halogenous component
241		. . Free halogen
240S		. . Solid removal agent
242.1		. Sulfur or sulfur containing component
242.2		. . Utilizing reactant having organic portion to remove or modify sulfur or sulfur containing component
242.3		. . . Organic acid
242.4		. . . Alcohol, arylhydroxide, or polyol
242.5		. . . Sugar
242.6		. . . Heterocyclic
242.7		. . . Amine
243.01		. . Utilizing aqueous reactant to remove or modify sulfur or sulfur containing component
243.02		. . . And addition of gaseous reactant
243.03		. . . . Oxygen
243.04		. . . Ion separation step
243.05		. . . With component added to inhibit corrosion or scaling of processing apparatus
243.06		. . . Ammonium compound reactant
243.07		. . . Transition metal or compound thereof reactant
243.08		. . . Alkali or alkali earth compound reactant
243.09		. . . . Sulfite
243.1		. . . . And additional ionic reactant
243.11		. . . And subsequent reactive treatment to remove sulfur from spent reactant
243.12		. . . . Gaseous treatment
244.01		. . Utilizing solid reactant or catalyst to remove or modify sulfur or sulfur containing component
244.02		. . . Reactant or catalyst on support
244.03		. . . . Carbonaceous support
244.04		. . . . Aluminosilicate support
244.05		. . . Reactant added to fuel for reaction in gas mixture
244.06		. . . Transition metal or compound thereof reactant
244.07		. . . Alkali or alkaline earth or compound reactant
244.08		. . . . Carbonate
244.09		. . . Catalyst
244.1		. . . . Transition metal or compound thereof catalyst
244.11		. . . . Zeolite containing
245.1		. Organic component
245.2		. . Utilizing liquid reactant
245.3		. . By burning or catalytically combusting component
246		. Carbon monoxide component
247		. . Utilizing solid sorbent, catalyst, or reactant
248		. Hydrogen component
215.5		. Solid component
249		RADIOACTIVE (AT. NO. 84+ OR RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT)
250		. Transuranium compound
251		. . Plutonium containing
252		. Thorium compound
253		. Uranium compound
254		. . Binary compound
255		. . . Hydrogen containing
256		. . . Carbon containing
257		. . . Chlorine containing
258		. . . Fluorine containing
259		. . . . Tetrafluoride
260		. . . Oxygen containing
261		. . . . Dioxide
262		INERT OR NOBLE GAS OR COMPOUND THEREOF
263		RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71)
264		CHANGING COLOR CHARACTERISTIC OF IMPURITY
265		WITH ADDITIVE
266		. For stabilizing crystal size or shape
267		. Including anticaking or antihygroscopic function
268		. . Additive contains organic portion
269		. Including corrosion inhibitor
270		. For sulfur trioxide
271		. . Additive contains metal, boron, or silicon
272		. For hydrogen peroxide
273		. . Additive contains metal, boron, or silicon
274		. Coating or binder
275		. Additive contains metal, boron, or silicon
276		BORON OR COMPOUND THEREOF
277		. Oxygen containing
278		. . Binary compound
279		. . Ternary compound containing metal or ammonium
280		. . . Utilizing dissolved or liquid reactant
281		. . . . Peroxide
282		. . . . Carbon containing
283		. . Ternary compound containing hydrogen
284		. Nitrogen and hydrogen containing
285		. . Ternary compound
286		. Hydrogen and metal or ammonium containing
287		. . Utilizing halogen containing reactant
288		. . Utilizing oxygen containing reactant
289		. Binary compound (e.g., boride, etc.)
290		. . Nitrogen containing
291		. . Carbon containing
292		. . Halogen containing
293		. . . Fluorine
294		. . Hydrogen containing
295		. . . By reacting metal hydride or organic derivative thereof
296		. . . By reacting free hydrogen
297		. . Refractory metal containing (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, or W)
298		. Elemental boron
299		PHOSPHORUS OR COMPOUND THEREOF
300		. Halogen containing
301		. . Fluorine
302		. Nitrogen containing
303		. Sulfur containing
304		. Oxygen containing
305		. . Metal or ammonium containing
306		. . . Plural metal or metal and ammonium containing
307		. . . Hydrogen containing
308		. . . . Orthophosphate (e.g., calcium hydroxyapatite)
309		. . . . . Utilizing phosphoric acid or its anhydride as reactant
310		. . . . . . And ammonia
311		. . . Orthophosphate
312		. . . . Alkali metal or ammonium containing
313		. . . . . Utilizing phosphoric acid as reactant
314		. . . Metaphosphate
315		. . . Triphosphate or tetraphosphate
316		. . Ternary compound containing hydrogen
317		. . . Orthophosphoric acid
318		. . . . Utilizing reactant containing silicon or carbon
319		. . . . Reacting an acid and phosphate rock
320		. . . . . Sulfuric acid
321.1		. . . . Purification or recovery
321.2		. . . . . Organic solvent extraction
322		. Elemental phosphorus
323		. . Utilizing a phosphate as reactant
324		SILICON OR COMPOUND THEREOF
325		. Oxygen containing
326		. . Metal containing (i.e., silicate)
327.1		. . . Aluminum containing
327.2		. . . . Mullite
328.1		. . . . Aluminosilicate
328.2		. . . . . Crystalline
328.3		. . . . . . Mica
329.1		. . . . . X-ray diffraction pattern
330.1		. . . . . Gelling or precipitation
331		. . . Alkaline earth metal containing (Mg, Ca, Sr, or Ba)
332		. . . Alkali metal containing (Li, Na, K, Rb, or Cs)
333		. . . . By precipitating or gelling from silicate solution
334		. . . . By heat treating silica and the alkali metal
335		. . Silica
336		. . . By hydrolyzing vapor phase silicon compound
337		. . . By oxidizing volatile silicon compound (e.g., combustion, etc.)
338		. . . By gelling
339		. . . By precipitating
340		. . . By purifying sand
341		. Halogen containing
342		. . Halogenated silane
343		. . Volatizing a solid
344		. Binary compound (e.g., silicide, etc.)
345		. . Of carbon (i.e., silicon carbide)
346		. . . By reacting vapor phase silicon compound with carbon or carbon containing compound
347		. . Of hydrogen (e.g., silane, etc.)
348		. Elemental silicon
349		. . From silicon containing compound
350		. . . Utilizing reducing substance
351		NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)
352		. Ammonia or ammonium hydroxide
353		. . From nitride of metal or silicon
354		. . And producing inorganic carbon and nitrogen containing compound
355		. . By hydrolyzing inorganic carbon and nitrogen containing compound
356		. . From ammonium compound
357		. . . Utilizing calcium compound
358		. . From organic material containing nitrogen
359		. . From elemental hydrogen and nitrogen
360		. . . With exchanging heat between catalyst and synthesis or effluent gas
361		. . . Utilizing plurality of catalyst beds or portions
362		. . . Utilizing metal containing catalyst
363		. . . . Alkali or alkaline earth metal
364		. Carbon containing
365		. . And oxygen containing (e.g., fulminate, cyanate, etc.)
366		. . And sulfur containing (e.g., thiocyanate, etc.)
367		. . And iron containing (e.g., ferrocyanide, etc.)
368		. . Cyanamide radical containing
369		. . . And hydrogen containing
370		. . . Utilizing carbide as reactant
371		. . Ternary compound
372		. . . Hydrogen cyanide
373		. . . . Employing formamide or formate as reactant
374		. . . . Utilizing nitric oxide or free nitrogen as reactant
375		. . . . Employing ammonia as reactant
376		. . . . . And using catalyst
377		. . . . Utilizing metal cyanide as reactant
378		. . . Using cyanamide as reactant
379		. . . Utilizing hydrogen cyanide as reactant
380		. . . Utilizing free nitrogen as reactant
381		. . . . And using catalyst
382		. . . . Utilizing carbon reactant from specified source
383		. . Halogen containing
384		. . Binary (e.g., cyanogen, etc.)
385		. Oxygen containing
386		. . Halogen containing
387		. . Hydrogen containing
388		. . . Sulfur containing
389		. . . . Sulfamic acid
390.1		. . . Nitric acid
391		. . . . By reacting a salt and an acid
392		. . . . Utilizing ammonia as reactant
393		. . . . Utilizing nitrogen oxide as reactant
394		. . . . . Nitrogen peroxide
394.2		. . . . Purification or recovery
395		. . Nitrate
396		. . . Ammonium containing
397		. . . Utilizing ammonium or metal nitrate as reactant
398		. . . Utilizing halogen containing reactant
399		. . . . And nitric acid reactant
400		. . Binary compound (oxide of nitrogen)
401		. . . Utilizing nitrosyl chloride as reactant
402		. . . Utilizing catalyst
403		. . . . And ammonia as reactant
404		. . . . . Catalyst is metal oxide
405		. . . Nitric oxide (NO)
406		. Binary compound
407		. . Hydrazine or hydrazine hydrate
408		. . . Utilizing halogen or sulfur as reactant
409		. . Metal or ammonium containing
410		. . . Azide
411		. . . Titanium or zirconium containing
412		. . . Aluminum containing
413		. Hydrogen containing (e.g., amide, imide, etc.)
414		CARBON OR COMPOUND THEREOF
415.1		. Oxygen containing
415.2		. . Percarbonate compound
416		. . Carbonyl
417		. . . Metal containing
418		. . . . Utilizing organic compound as reactant
418.2		. . Carbon monoxide
419.1		. . Carbonate or bicarbonate
420		. . . Ammonium containing
420.2		. . . Plural metal containing
421		. . . Alkali metal containing (Li, Na, K, Rb, or Cs)
422		. . . . Hydrogen containing (bicarbonate)
423		. . . . . By carbonating ammoniated brine
424		. . . . . By reacting halogen containing compound
425		. . . . . Sesquicarbonate
426		. . . . Densifying soda ash
427		. . . . By reacting a bicarbonate
428		. . . . By reacting sulfur containing compound
429		. . . . By reacting halogen containing compound
430		. . . Alkaline earth metal containing (Mg, Ca, Sr, or Ba)
431		. . . . By reacting sulfur or halogen containing compound
432		. . . . By reacting oxide or hydroxide of the metal
433		. . . Lead containing
434		. . . . By reacting compound containing sulfur or a halogen
435		. . . . By reacting lead acetate or acetic acid
436		. . . . . And utilizing metallic lead as reactant
437.1		. . Carbon dioxide or carbonic acid
438		. . . From a carbonate
437.2		. . . From carbon monoxide
439		. Binary compound (e.g., carbide, etc.)
440		. . Refractory metal containing
441		. . Calcium containing
442		. . . By reacting carbon and inorganic calcium containing compound
443		. . Disulfide
444		. . . By reacting free carbon
445R		. Elemental carbon
446		. . Diamond
447.1		. . Fiber, fabric, or textile
447.2		. . . Product
447.3		. . . From gaseous reactants
447.4		. . . Prior treatment before carbonization (except with gaseous oxygen)
447.5		. . . . With metal, metal compound, or phosphorus compound
447.6		. . . Including reaction with gaseous oxygen
447.7		. . . In specific atmosphere (other than vacuum or air)
447.8		. . . Controlling varying temperature or plural heating steps
447.9		. . . Carbonizing cellulosic material
448		. . Graphite
449.1		. . Carbon black (e.g., lampblack)
449.2		. . . Treating carbon black
449.3		. . . . Treating with acid, or gas which forms acid in water
449.4		. . . . Halogen or compound thereof
449.5		. . . . Gaseous oxygen containing compound
449.6		. . . Utilizing synthetic polymer as reactant
449.7		. . . . Tire
449.8		. . . Solid material in feed
450		. . . Directly from fluid hydrocarbon only
451		. . . . Rapid and discontinuous oxidation
452		. . . . Including flame impinging on cool surface
453		. . . . By contacting with catalyst or hot solid surface
454		. . . . . Hot particulate bed or reaction zone lining or refactory
455		. . . . Specified injection velocity
456		. . . . Specified injection angle (e.g., helical, tangential, etc.)
457		. . . . . At least one radial inlet
458		. . . . Gas or vapor only as infeed to process
449.9		. . . Liquid feed only
459		. . . From carbon monoxide infeed to process
460		. . Treating carbon
461		. . Recovery or purification
445B		. . Fullerene (e.g., C60, C70, etc.)
462		HALOGEN OR COMPOUND THEREOF
463		. Plural metal or metal and ammonium containing
464		. . Including fluorine
465		. . . Including aluminum
466		. Plural diverse halogens containing
467		. Sulfur containing
468		. . Ternary compound containing oxygen
469		. . Binary compound
470		. Ammonium halide
471		. . Recovery or purification
472		. Ternary compound
473		. . Hypohalite or hypohalous acid
474		. . . Calcium hypochlorite
475		. . Halogenate (e.g., chlorates, etc.)
476		. . Perhalate or perhalic acid
477		. Chlorine dioxide
478		. . By reacting a chlorate
479		. . . And a nitrogenous or carbonaceous compound
480		. . . And sulfur dioxide
481		. Hydrogen halide
482		. . By reacting alkali metal salt with sulfuric acid
483		. . Hydrogen fluoride
484		. . . From impure starting material
485		. . . . Fluorspar
486		. . Utilizing an element as reactant
487		. . . Reacting elemental hydrogen and elemental halogen
488		. . Recovery or purification
489		. Binary fluorine containing compound
490		. . Alkali or alkaline earth metal containing
491		. Binary compound containing metal
492		. . Refractory metal (Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W)
493		. . Iron group metal or copper (Fe, Co, Ni, or Cu)
494		. . Group IVA metal or copper (Ge, Sn, or Pb)
495		. . Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be)
496		. . . Utilizing carbon or carbon containing compound
497		. . Alkaline earth metal (Mg, Ca, Sr, or Ba)
498		. . . Anhydrous magnesium chloride
499.1		. . Alkali metal
499.2		. . . From carbonaceous compound
499.3		. . . Lithium chloride
499.4		. . . Sodium chloride
499.5		. . . . Purification
500		. Elemental halogen
501		. . Ion exchanging or liquid-liquid extracting
502		. . Oxidizing catalytically
503		. . Sorbing
504		. . From mixture containing alkali metal or alkaline earth metal
505		. . . Forming insoluble substance in liquid
506		. . By reacting alkali metal halide with sulfur compound
507		. . By reacting hydrogen halide or ammonium halide
508		SELENIUM OR TELLURIUM OR COMPOUND THEREOF
509		. Binary compound
510		. Elemental selenium or tellurium
511		SULFUR OR COMPOUND THEREOF
512.1		. Oxygen containing
513		. . Persulfate
514		. . Thiosulfate
515		. . Dithionite
516		. . . Employing amalgam as reactant
517		. . Metal and ammonium containing
518		. . Plural metal containing
519		. . Bisulfite
519.2		. . Sulfite
520		. . . Bisulfate
521		. . Ternary compound containing hydrogen
522		. . . Sulfuric acid
523		. . . . Nitrogenous impurity or utilizing nitrogenous catalyst or reactant
524		. . . . . Lead chamber process
525		. . . . Starting material includes organic or carbonaceous impurity
526		. . . . . Utilizing pressure or vacuum on mixture
527		. . . . . Adding organic compound to mixture
528		. . . . . Contacting mixture with gas, steam, or vapor
529		. . . . Subjecting reactants to pressure, vacuum, or steam
530		. . . . Utilizing metal sulfate
531		. . . . Purifying acid or reactant
532		. . Sulfur trioxide
533		. . . Utilizing catalyst in reaction
534		. . . . Promoter or successive diverse catalysts
535		. . . . Catalyst contains oxygen, vanadium, and another metal
536		. . . . Platinum catalyst
537		. . . . . With sulfate or asbestos carrier
538		. . . . Oxygen containing catalyst
539		. . Sulfur dioxide
540		. . . From acid sludge or waste
541.1		. . . Utilizing metal sulfate as reactant
541.4		. . . . Ammonium sulfate
542		. . . Burning or roasting a sulfur compound
543		. . . Burning sulfur
544		. . Sulfate
545		. . . Ammonium containing
546		. . . . Utilizing thiocyanate as reactant
547		. . . . Employing sulfite or bisulfite as reactant
548		. . . . Using metal sulfate as reactant
549		. . . . Employing sulfuric acid as reactant
550		. . . . . Ammonia from waste gas
551		. . . Alkali metal containing (Li, Na, K, Rb, or Cs)
552		. . . . Utilizing chloride as reactant
553		. . . . Dehydrating
554		. . . Alkaline earth metal containing (Mg, Ca, Sr, or Ba)
555		. . . . Calcium
556		. . . Aluminum containing
557		. . . Copper containing
558		. . . Iron containing
559		. . . Lead containing
560		. Ternary compound containing hydrogen and metal (e.g., hydrosulfide, etc.)
561.1		. Binary compound
562		. . Polysulfide
563		. . Hydrogen sulfide
564		. . . By catalytic reaction
565		. . Utilizing free sulfur as reactant
566		. . Utilizing sulfate or sulfuric acid as reactant
566.1		. . Sulfide of Cd, Zn, or Hg
566.2		. . Sulfide of alkali metal
566.3		. . Sulfide of alkaline earth metal
567.1		. Elemental sulfur
568		. . Chlorinating
569		. . Reducing sulfur dioxide by carbon containing material
570		. . . Catalytic reaction
571		. . Reacting a sulfide
572		. . . With steam to form hydrogen sulfide
573.1		. . . Hydrogen sulfide
574.1		. . . . With sulfur dioxide
574.2		. . . . . In inorganic liquid
575		. . . . . Utilizing organic solvent or absorbent
576		. . . . . Utilizing promotor containing silica or aluminum
576.2		. . . . With specified procedure for sulfur recovery or specified conditions for producing sulfur in more recoverable form
576.4		. . . . By reacting gaseous feed stream with liquid aqueous mixture
576.5		. . . . . Transition metal-containing mixture
576.6		. . . . . . Chelated or sequestered transition metal
576.7		. . . . . Organic compound-containing
576.8		. . . . By reacting gaseous feed with gas containing free oxygen
577		. . . Reacting metal sulfide with sulfur dioxide
578.1		. . Purifying crude sulfur
578.2		. . . From ore
578.4		. . From liquid or solid compound
579		OXYGEN OR COMPOUND THEREOF
580.1		. Water
580.2		. . Heavy water
581		. Superoxide or ozone
582		. Peroxide
583		. . Alkaline earth metal (Mg, Ca, Sr, or Ba)
584		. . Hydrogen
585		. . . From persulfuric acid or persulfate
586		. . . From inorganic peroxide
587		. . . From organic reactant
588		. . . . By oxidizing hydroquinone or anthraquinone
589		. . . . . Including dissolving reactant in ester containing solvent
590		. . . . . Including dissolving reactant in alcohol containing solvent
591		. . . . By oxidizing alcohol or hydrocarbon
592		. Metal containing
593		. . Plural metals or metal and ammonium
594		. . . Iron, cobalt, or nickel (e.g., ferrite, etc.)
595		. . . Chromium (e.g., chromate, etc.)
596		. . . . And alkali metal, alkaline earth metal, or ammonium containing
597		. . . . . Dichromate
598		. . . Titanium (e.g., titanate, etc.)
599		. . . Manganese (e.g., manganate, etc.)
600		. . . Aluminum (e.g., aluminate, etc.)
601		. . . Arsenic (e.g., arsenite, etc.)
602		. . . . Arsenate
603		. . . . . And lead containing
604		. . Group IB metal (Cu, Ag, or Au)
605		. . Group VIIB metal (Mn, Tc, or Re)
606		. . Group VIB metal (Cr, Mo, or W)
607		. . . Chromium
608		. . Group IVB metal (Ti, Zr, or Hf)
609		. . . Titanium monoxide or sesquioxide
610		. . . Titanium dioxide
611		. . . . Utilizing titanium halide as reactant
612		. . . . . Titanium tetrahalide
613		. . . . . . Reacting with oxiding gas
614		. . . . . . . In fluidized bed
615		. . . . Utilizing titanium sulfate as reactant
616		. . . . . And utilizing acid
617		. . Group VA metal or arsenic (Sb, Bi, or As)
618		. . Group IVA metal (Ge, Sn, or Pb)
619		. . . Lead
620		. . . . Utilizing metallic lead as reactant
621		. . . . . Molten
622		. . Zinc
623		. . . Volatizing zinc
624		. . Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be)
625		. . . Aluminum
626		. . . . Utilizing acid
627		. . . . Reacting metallic aluminum with water or water vapor
628		. . . . Forming catalyst, sorbent activated, or narrow pore alumina
629		. . . . Hydroxide
630		. . . . Utilizing carbon or compound thereof as reactant
631		. . . . Utilizing nitrogenous compound as reactant
632		. . Iron
633		. . . Ferric oxide
634		. . . . Gamma form
635		. . Alkaline earth metal (Mg, Ca, Sr, or Ba)
636		. . . Process of manufacturing
637		. . . . Utilizing carbonate as reactant
638		. . . . By reacting a sulfur containing compound
639		. . . . By reacting a nitrogenous or halogenous compound
640		. . . . By hydrating lime
641		. . Alkali metal (Li, Na, K, Rb, or Cs)
642		. . . By reacting sulfur containing compound
643		. . . By reacting a nitrogenous or halogenous compound
644		HYDROGEN OR COMPOUND THEREOF
645		. Binary compound
646		. . Alkali metal containing (Li, Na, K, Rb, or Cs)
647		. . Alkaline earth metal containing (Mg, Ca, Sr, or Ba)
647.7		. Deuterium-containing
648.1		. Elemental hydrogen
649		. . Ortho-para conversion
650		. . By decomposing hydrocarbon
651		. . . Catalytic reaction
652		. . . . Including decomposing water
653		. . . . . Catalyst substance contains nickel
654		. . . . . . And another metal
655		. . By reacting water with carbon monoxide
656		. . . Utilizing metal oxide catalyst
657		. . By reacting water or aqueous solution with metal or compound thereof
658		. . . Iron
658.2		. . By direct decomposition of binary compound; e.g., chemical storage, etc.
658.3		. . By reaction of impurities in a stream containing elemental hydrogen
658.5		EXTRACTING, LEACHING, OR DISSOLVING
659		MISCELLANEOUS PROCESS
		******************************
		DIGESTS
		******************************
DIG 1		Waste acid containing iron
DIG 2		. Sulfuric acid
DIG 3		Papermaking liquor
DIG 4		Manganese marine modules
DIG 5		Automatic (including computer) control
DIG 6		Temperature control
DIG 7		Isotope separation
DIG 8		Corrosion or deposition inhibiting
DIG 9		Reaction techniques
DIG 10		. Plasma energized
DIG 11		. High pressure
DIG 12		. Molten media
DIG 13		. Catalyst contact
DIG 14		. Ion exchange; chelation or liquid/liquid ion extraction
DIG 15		. Comminution
DIG 16		. Fluidization
DIG 17		. Microbiological reactions
DIG 18		Treating trash or garbage
DIG 19		Geothermal steam purification
DIG 21		Faujasite; e.g., X, Y, CZS-3, ECR-4, Z-14HS, VHP-r
DIG 22		MFI; e.g., ZSM-5. Silicalite, LZ-241
DIG 23		Ferrierite; e.g., Sr-D ZSM-33
DIG 24		LTA; e.g., A, Alpha, ZK-4, ZK-21, ZK-22
DIG 25		Mordenite; e.g., Na-D, Pttilolite, Zeolon
DIG 26		Mazzite; e.g., ZSM-4, Omega
DIG 27		Beta; e.g., NU-2
DIG 28		LTL; e.g., Ba-g, L, AG-1, AG-2, AG-4, Ba-6
DIG 29		MEL; e.g., ZSM-11
DIG 30		ALPO and SAPO
DIG 31		RHO; e.g., ECR-10, LZ-214
DIG 32		Sodalite; e.g., HS, Ultramarine
DIG 33		MTW; e.g., ZSM-12, NU-13, Czh-5, TPZ-3
DIG 34		Pentasils other than MFI and MEL; e.g., AZ-1, TZ-01, TZ-02, TRS, ZBM-10
DIG 35		TON; e.g., Theta-1, ISI-1, KZ-2, ZSM-22, NU-10
DIG 36		MTT; e.g., ZSM-23, ISI-1, KZ-1, EU-1, EU-4, EU-13
DIG 37		LEV; e.g., Levynik, ZMT-45, ZK-20, NU-3, LZ-132, LZ-133
DIG 38		Offretite; e.g., TMA Offreite
DIG 39		Fullerene (e.g., C60, C70, etc.) derivative and related process
DIG 40		Fullerene composition

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Last Modified: 6 October 2000