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

Class
203
DISTILLATION: PROCESSES, SEPARATORY

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Subclass		Title
ClassTitle		===> DISTILLATION: PROCESSES, SEPARATORY
1		WITH MEASURING, TESTING OR INSPECTING
2		. Of temperature or pressure
3		. Of concentration
4		INCLUDING PURGING OF THE SYSTEM
5		SEPARATING ISOTOPES OR TAUTOMERS
6		ADDITION OF MATERIAL TO DISTILLAND TO INHIBIT OR PREVENT REACTION OR TO STABILIZE
7		. For scale inhibiting or corrosion preventing
8		. For inhibiting or preventing a polymerization reaction
9		. . Of unsaturated hydrocarbon
10		WATER PURIFICATION ONLY
11		. Under pressure or vacuum
12		DISTILLING TO SEPARATE OR REMOVE ONLY WATER
13		. From nitric acid
14		. From organic compound
15		. . Organic acid
16		. . . Acetic
17		. . Aldehyde or ketone
18		. . Alcohol
19		. . . Ethanol
20		INCLUDING DEFOAMING OR INHIBITING FOAM
21		AND RECOVERING HEAT BY INDIRECT HEAT EXCHANGE
22		. Utilizing recovered heat for heating feed
23		. . Distillation residue as heat source
24		. . Compressed vapor as heat source
25		. Utilizing recovered heat for heating the distillation zone
26		. . Compressed vapor as heat source
27		. Utilizing recovered heat in subsequent step in process
28		WITH CHEMICAL REACTION
29		. Including step of adding catalyst or reacting material
30		. . For polymerizing unwanted component
31		. . Oxidizing material
32		. . Reducing material
33		. . Inorganic salt containing oxygen in the anion
34		. . Acid
35		. . . Phosphoric or sulfuric acid
36		. . Alkaline oxide or hydroxide
37		. . . Alkali metal hydroxide
38		. . Organic material
39		WITH DISPARATE PHYSICAL SEPARATION
40		. Of entrained particles from a vapor or gas
41		. Utilizing solid sorbent
42		. Utilizing liquid sorption of component from gas or vapor
43		. Utilizing liquid-liquid extracting of distillation product
44		. . Of distillate
45		. . . And distilling raffinate phase
46		. . . And distilling extractant phase
47		. Utilizing removing solid from liquid
48		. . By crystallizing
49		CONVECTIVE DISTILLATION WITH NORMALLY GASEOUS MEDIUM, E.G., AIR
50		ADDING MATERIAL TO DISTILLAND EXCEPT WATER OR STEAM PER SE
51		. At least two materials
52		. . Mixtures of hydrocarbons
53		. . One material is water
54		. . . A second material is aldehyde or ketone
55		. . . A second material is an alcohol
56		. . One additive an alcohol or ether
57		. Organic compound
58		. . Heterocyclic
59		. . Amine
60		. . Ester
61		. . Acid
62		. . Aldehyde or ketone
63		. . Alcohol or ether
64		. . . Polyhydroxy alcohol or ether derivative thereof
65		. . . Hydroxy aromatic (e.g., Phenol)
66		. . . Methanol
67		. . Halogenated hydrocarbon
68		. . Hydrocarbon
69		. . . Aromatic
70		. . . Acyclic
71		PLURAL DISTILLATIONS PERFORMED ON SAME MATERIAL
72		. One a filming distillation
73		. One a distillation under positive pressure or vacuum
74		. . Distillation of initial distillate
75		. . . And return of distillation product to a previous distillation zone
76		. . . Including the addition of water or steam
77		. . . Initial distillation under positive pressure or vacuum
78		. . And returning distillation product to a previous distillation zone
79		. . Including the addition of water or steam
80		. . Initial distillation under positive pressure or vacuum
81		. Distillation of initial distillate
82		. . And returning distillation product to a previous distillation zone
83		. . Including the addition of water or steam
84		. And returning distillation product to a previous distillation zone
85		. Including the addition of water or steam
86		DISTILLATION IN APPARATUS OR ELEMENT OF SPECIFIC MATERIAL
87		WITH FRACTIONAL CONDENSATION OF VAPOR OUTSIDE STILL
88		FLASH VAPORIZATION OF DISTILLAND
89		FILMING OF DISTILLAND FOR VAPORIZATION
90		SPRAYING OF DISTILLAND INTO VAPORIZATION ZONE
91		VAPORIZATION ZONE UNDER POSITIVE PRESSURE OR VACUUM
92		. Including the addition of water or steam
93		. . And returning product of distillation step to distillation zone
94		. And returning product of distillation step to distillation zone
95		INCLUDING ADDITION OF WATER OR STEAM
96		. To distillation column
97		. And returning product of distillation step to distillation zone
98		AND RETURNING PRODUCT OF DISTILLATION STEP TO DISTILLATION ZONE
99		MISCELLANEOUS SEPARATORY
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		CROSS-REFERENCE ART COLLECTION
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100		PARTICULAR TYPE OF HEATING
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		DIGESTS
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DIG 1		Solar still
DIG 2		Laboratory distillation
DIG 3		Acrylonitrile
DIG 4		Heat pump
DIG 5		Human waste
DIG 6		Reactor-distillation
DIG 7		Start up or shut down
DIG 8		Waste heat
DIG 9		Plural feed
DIG 10		Vinyl acetate
DIG 11		Batch distillation
DIG 13		Spirits
DIG 14		Ejector-eductor
DIG 16		Combination
DIG 17		Saline water conversion
DIG 18		Control
DIG 19		Sidestream
DIG 20		Power plant
DIG 21		Acrylic acid or ester
DIG 22		Accessories
DIG 23		Methanol
DIG 24		Mobile, marine distiller
DIG 25		Non-distilling bottoms treatment

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Last Modified: 6 October 2000