Cooperative Patent Classification


CPC Definition - Subclass C01F

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Last Updated Version: 2016.11
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B 17/42; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; binary compounds of nitrogen with metals C01B 21/06; azides C01B 21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B 21/082; amides or imides of silicon C01B 21/087}; metal {imides or} amides C01B 21/092, {C01B 21/0923}; nitrites C01B 21/50; {compounds of noble gases C01B 23/0005}; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; carbides C01B 31/30; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00; compounds having molecular sieve properties but not having base-exchange properties C01B 37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B 39/00; cyanides C01C 3/08; salts of cyanic acid C01C 3/14; salts of cyanamide C01C 3/16; thiocyanates C01C 3/20; {double sulfates of magnesium with sodium or potassium C01D 5/12; with other alkali metals C01D 15/00, C01D 17/00})
Definition statement

This place covers:

All compounds of Be,Mg,Al,Ca,Sr,Ba,Ra,Th or rare earth metals except those compounds which are classified in C01G because of application of the last appropriate place rule. So, in principle does this subclass comprise all Al-compounds with elements as such being part of C01B-C01D, e.g. Al2O3, Al(NO3)3, Al2S3.

References
Limiting references

This place does not cover:

Exceptions to the last appropriate place rule:

Metal hydrides, monoborane, diborane or addition complexes thereof

Salts of oxyacids of halogens

Peroxides, salts of peroxyacids

Sulfides or polysulfides of magnesium, calcium, strontium, or barium

Thiosulfates, dithionites, polythionates

Compounds containing selenium or tellurium

Binary compounds of nitrogen with metals

Azides

Compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals

Amides or imides of silicon

Metal imides or amides

Nitrites

Compounds of noble gases

Phosphides

Salts of oxyacids of phosphorus

Carbides

Compounds containing silicon

Compounds containing boron

Compounds having molecular sieve properties but not having base-exchange properties

Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites

Cyanides

Salts of cyanic acid

Salts of cyanamide

Thiocyanates

Double sulfates of magnesium with sodium or potassium

With other alkali metals

Preparation of inorganic compounds in general:

Halides:

(hydr)oxides:

(poly)sulfides:

Sulfates:

Sulfites:

Nitrates:

Nitrites:

(bi)carbonates:

Ammonium-salts:

Informative references

Attention is drawn to the following places, which may be of interest for search:

Catalysts in general:

Chemical processing in general:

Shaped ceramic bodies:

Improving pigmenting or filling properties of inorganic compounds:

Obtaining compounds by metallurgical methods:

Obtaining metals (in elemental form):

Obtaining compounds by electrochemistry:

Macroscopic single crystals:

Special rules of classification
  • In the whole class C01 (thus also in this subclass C01F) is the last appropriate place rule applied (see the Note after the class title) and are chemical names to be taken in a strictly limitative sense (see the Note after the class title C01).
  • Compounds comprising in addition to Al, two or more other elements (H and O not counted) are classified in C01F 7/002-C01F 7/008.
Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

In this subclass, the nomenclature of groups of elements used is defined in the Note after the section title C.

Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or the rare earths, in general
Definition statement

This place covers:

General preparation features for (mostly groups) of compounds of the elements specified and being part of subclass C01F.

References
Limiting references

This place does not cover:

General preparation features of compounds which comprise elements classified in C01G (mostly transition elements):

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Preparation of inorganic compounds in general:

Halides:

(hydr)oxides:

(poly)sulfides:

Sulfates:

Sulfites:

Nitrates:

Nitrites:

(bi)carbonates:

Ammonium-salts:

Compounds of beryllium
Definition statement

This place covers:

All compounds of beryllium except those with elements as such classified after C01F 3/00 and except those as specified after the subclass title of C01F.

Compounds of magnesium
Definition statement

This place covers:

All compounds of magnesium except those with elements as such classified after C01F 5/00 and except those as specified after the subclass title C01F.

Compounds of aluminium
Definition statement

This place covers:

All compounds of aluminium except those with elements as such classified after C01F 7/00 and except those as specified after the subclass title C01F.

Synonyms and Keywords

In patent documents the following synonyms are often used:

Aluminium

aluminum

{Compounds containing, besides aluminium, two or more other elements, with the exception of oxygen and hydrogen (compounds containing aluminium, fluorine and alkali or alkaline earth metals C01F 7/54; compounds containing sulfur and other cations besides aluminium C01F 7/68)}
Definition statement

This place covers:

compounds comprising apart from aluminium more than one other element, thereby not taken into account O and H. So simple compounds like Al2S3, Al(NO3)3 or AlCl3 are classified according to the groups specially created therefore (see the subgroups of C01F 7/00). More complex compounds however comprising two or more elements (cations or anions; O and H excluded) other than alumuminium are classified in this group C01F 7/002.

References
Limiting references

This place does not cover:

Compounds containing aluminium, fluorine and alkali or alkaline earth metals:

Compounds containing sulfur and other cations besides aluminium:

{containing, besides aluminium, only anions, e.g. Al(OH)xCLy(SO4)z (mixed halides C01F 7/48)}
Definition statement

This place covers:

compounds comprising apart from aluminium more than one other anionic element, thereby not taken into account O.

References
Limiting references

This place does not cover:

Mixed halides

Aluminium oxide; Aluminium hydroxide; Aluminates
Definition statement

This place covers:

All aluminium oxides, hydroxides, (oxy)hydroxides or aluminates.

References
Limiting references

This place does not cover:

Organic compounds containing aluminium:

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Aluminosilicates:

Zeolites:

Special rules of classification

A document disclosing an aluminium oxide or hydroxide prepared by one single preparation method is classified according to the method. A document teaching the oxide or hydroxide compound as such and specifying method(s) for preparation is classified according to the method(s) and is also classified in C01F 7/02 according to the compound.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Aluminium oxide or hydroxide:

aluminium oxide (all polymorphs, e.g. alpha, gamma), hydroxide or (oxy)hydroxide

Bayerite, hydrargilite/gibbsite and norstrandite:

polymorphs of Al(OH)3

Boehmite or diaspore:

polymorphs of AlOOH

Corundum or alpha-alumina:

high temperature phase of Al2O3

Synonyms and Keywords

In patent documents the following expressions are often used as synonyms:

AlO(OH) aluminium oxyhydroxide

Al2O3.H2O aluminium monohydrate

Al(OH)3 aluminium hydroxide

Al2O3·3H2O aluminium trihydrate

{After-treatment of oxides or hydroxides}
Definition statement

This place covers:

The physical and chemical after-treatments of aluminium (hydr)oxides in general.

References
Limiting references

This place does not cover:

(After-)Treatments of aluminium (hydr)oxides in order to improve their pigmenting or filling properties:

Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom {(C01F 7/028 takes precedence)}
References
Limiting references

This place does not cover:

Aluminates with a minor amount of other elements and chaaracterised as beta-alumina's:

by treating aluminous minerals {or waste-like raw materials} with alkali hydroxide, {e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F 7/14)}
Definition statement

This place covers:

C01F 7/06 and subgroups cover treatments of bauxite according to the Bayer process insofar it relates to the pretreatment and digestion of the ore and separation of the red mud. Also included are the recovery of the spent liquor cycle stream.

References
Limiting references

This place does not cover:

Precipitation of aluminium hydroxide from the pregnant aluminate stream by cooling, according to the Bayer process:

Obtaining aluminium oxide (alumina) by calcination of aluminium hydroxide obtained via the Bayer process:

Purification of the aluminate solution (clarification) obtained after separation of the red mud as part of the Bayer process:

{characterised by the flocculant added to the slurry (final clarification of the aluminate solution C01F 7/47)}
Definition statement

This place covers:

The addition of agents for settling the red mud in Bayer process decanters.

References
Limiting references

This place does not cover:

The final clarification of aluminate solutions obtained from the settling tanks in the Bayer process:

Preparation of alkaline-earth metal aluminates {or magnesium aluminate}; Aluminium oxide or hydroxide therefrom {(C01F 7/028 takes precedence)}
Definition statement

This place covers:

Some of the phases in the subgroups of C01F 7/16 are qualified as having the spinel structure.

References
Limiting references

This place does not cover:

Aluminates with a small amount of non-aluminium elements and having the beta-alumina structure:

Synonyms and Keywords

In patent documents the expression is often used with the meaning:

Alkaline earth metal aluminate, (MgAl2O4):

spinel

{Hydrolysis or oxidation of gaseous aluminium compounds in the gas phase}
Definition statement

This place covers:

E.g. the oxidation of aluminium chloride in the gas phase.

References
Limiting references

This place does not cover:

The conversion of hydrated aluminium chloride by heating in the gase phase(i.e. thermal decomposition):

from organic aluminium salts
Definition statement

This place covers:

E.g. the preparation of aluminium hydroxide from aluminium alkoxides in non-aqueous (e.g. alcoholic) solutions.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Sol-gel processing in general for the preparation of oxides:

Special rules of classification

The preparation of aluminum hydroxides Al(OH)3 from inorganic salts (like aluminium sulfate or nitrate) is classified in C01F 7/34.

Compounds of calcium, strontium, or barium (C01F 7/00 takes precedence)
Definition statement

This place covers:

All compounds of calcium, strontium or barium except those with elements as such classified after C01F 11/00 and except those elements as specified in maingroup C01F 7/00.

References
Limiting references

This place does not cover:

Compounds of calcium, strontium or barium with aluminium:

{After-treatment, e.g. grinding, purification, conversion of crystal morphology}
References
Limiting references

This place does not cover:

Treatment of calcium carbonate for improving the pigmenting or filling properties (e.g. for application as filler in plastics or paper):

Synonyms and Keywords

In patent documents the following expressions are often used:

CaCO3

Calcite, aragonite, vaterite

Sulfates (dehydration of gypsum {for the production of calcium sulfate cements} C04B 11/02)
Definition statement

This place covers:

All forms of calcium sulfate, hydrated or free of crystal water

References
Limiting references

This place does not cover:

Dehydration of gypsum for the production of calcium sulfate cements:

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

Gypsum

Dihydrate

In patent documents, the following words/expressions are often used with the meaning indicated:

Gypsum

CaSO4·2H2O

Calcium sulfate hemihydrate

CaSO4·1/2H2O

Anhydriite

CaSO4

{Conversion of one form of calcium sulfate to another}
Definition statement

This place covers:

All dehydrations, hydrations or conversions without a change in the water content, excluded the dehydration of the dihydrate (gypsum) into hemihydrate as part of the cement production (see below).

References
Limiting references

This place does not cover:

Dehydration of gypsum for the production of calcium sulfate cements:

Compounds of radium
Definition statement

This place covers:

All compounds of radium except those with elements as such classified after C01F 13/00 and except those as specified after the subclass title C01F.

Compounds of thorium
Definition statement

This place covers:

All compounds of thorium except those with elements as such classified after C01F 15/00 and except those as specified after the subclass title C01F.

Compounds of the rare earth metals, i.e. scandium, yttrium, lanthanum, or the group of the lanthanides
Definition statement

This place covers:

All compounds of rare earth metals, i.e. scandium, yttrium, lanthanum or the group of the lanthanides except those with elements as such classified after C01F 17/00.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Abrasives consisting of rare earth metal compounds, e.g. ceria:

{Halogen being the only anion (compounds containing besides rare earth metals only different halogens, e.g. ScCl2F C01F 17/0056)}
References
Limiting references

This place does not cover:

Compounds containing besides rare earth metals only different halogens, e.g. ScClF:

{Oxides or hydroxides (ternary oxides or hydroxides, e.g. NaCeO2 C01F 17/0018)}
Definition statement

This place covers:

Only oxides of (one or more) rare earth metals as binary compounds (one or more rare earth metals taken as single species). Ternary oxide of rare earth metals with other cations (e.g. NaCeO2 or K(La,Sm)O2) are classified in C01F 17/0018

References
Limiting references

This place does not cover:

Ternary oxides or hydroxides, e.g. NaCeO2: