CPC Definition - Subclass C01C

Last Updated Version: 2017.08
AMMONIA; CYANOGEN; COMPOUNDS THEREOF ({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; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; azides C01B 21/08; {compounds other than ammonia or cyanogen, containing nitrogen, non-metals and optionally metals C01B 21/082}; metal imides or amides C01B 21/092; nitrites C01B 21/50; {compounds of noble gases C01B 23/0005}; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00)
References
Limiting references

This place does not cover:

Exceptions to the last appropriate place rule:

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 32/90

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

Special rules of classification

In the whole class C01 (thus also in this subclass C01C) 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).

Ammonia; Compounds thereof {(C01C 3/08, C01C 3/14, C01C 3/16, C01C 3/20 take precedence)}
References
Limiting references

This place does not cover:

Simple or complex cyanides of metals

C01C 3/08

Cyanic or isocyanic acid; salts thereof

C01C 3/14

Cyanamide; salts thereof

C01C 3/16

Thiocyanic acid; salts thereof

C01C 3/20

Complex ammine salts, like Pt(NH3)4Cl2classified in the relevant groups according to the metal

C01D - C01G

{from N2 and H2 in presence of a catalyst}
Definition statement

This place covers:

Features dealing with the catalytic gas phase synthesis of ammonia and not covered by the subgroups C01C 1/0411 - C01C 1/0488 are classified in this group. Also items related to the cycle, like by-passes or specific flow connections are classified in here.

References
Limiting references

This place does not cover:

The preparation or purification of ammonia synthesis gas, i.e. the N2+H2 gas mixture:

C01B 3/025

{characterised by the synthesis reactor, e.g. arrangement of catalyst beds and heat exchangers in the reactor (arrangement of several reactors C01C 1/0405; fixed-bed reactors in general B01J 8/02)}
Definition statement

This place covers:

This group covers the synthesis in gas phase of ammonia.

The detailed catalyst or the reactor used in the process being classified in the subgroups below.

Also heat exchangers arranged in the reactor are classified in here.

References
Limiting references

This place does not cover:

Arrangements of several reactors:

C01C 1/0405

Informative references

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

Fixed-bed reactors:

B01J 8/02

Preparation or purification of gas mixtures for ammonia synthesis

C01B 3/025

{Separation of NH3 (during purge gas treatment C01C 1/0476)}
References
Limiting references

This place does not cover:

Separation of ammonia from a separated purge gas flow:

C01C 1/0476

{from molasses (treatment of molasses in general C13B 50/006)}
References
Informative references

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

Treatment of molasses in general:

C13J

Separation of ammonia from ammonia liquors, e.g. gas liquors {(as part of the ammonia synthesis process C01C 1/04)}
References
Limiting references

This place does not cover:

Separation of ammonia as part of the ammonia synthesis process:

C01C 1/0405

Separation of ammonia from gases and vapours {(as part of the ammonia synthesis process C01C 1/04)}
References
Limiting references

This place does not cover:

Separation of ammonia as part of the ammonia synthesis process:

C01C 1/0405

Sulfates of ammonium (C01C 1/14 takes precedence)
References
Limiting references

This place does not cover:

Saturators:

C01C 1/14

{Preparation by decomposing nitrogen-containing organic compounds, e.g. molasse waste or urea (by distillation of carbamates C01C 3/02, C01C 3/08, C01C 3/14, C01C 3/16; by decomposing formamide or ammonium formate C01C 3/0204)}
References
Limiting references

This place does not cover:

Preparation by distillation of carbamates:

C01C 3/02, C01C 3/08, C01C 3/14, C01C 3/16

Preparation by decomposing formamide or ammonium formamate:

C01C 3/0204

{Cyanogen}
Glossary of terms

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

Cyanogen

C2N2

Synonyms and Keywords

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

Cyanogen

dicyan (US-doc's and FR-doc's) and ethanedinitrile.

{Halogenides of cyanogen}
Glossary of terms

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

Halogenides of cyanogen

XCN

{Thiocyanogen}
Glossary of terms

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

Thiocyanogen

(SCN)2

{Sulfurdicyanide}
Glossary of terms

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

Sulfurdicyanamide

S(CN)2

Preparation, {separation or purification} of hydrogen cyanide {(C01C 3/001 takes precedence)}
References
Limiting references

This place does not cover:

Preparations starting from nitrogen-containing organic compounds:

C01C 3/001

{from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process}
References
Limiting references

This place does not cover:

Preparation from hydrocarbons and ammonia in the absence of oxygen:

C01C 3/0229

{from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process}
References
Limiting references

This place does not cover:

Preparation from hydrocarbons and ammonia in the presence of oxygen:

C01C 3/0212

Glossary of terms

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

HMA

Hydrogen cyanide Methane Ammonia-process

Synonyms and Keywords

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

BMA (German documents)

Blausäure Methan Ammoniak-Verfahren

Simple or complex cyanides of metals {(C01C 3/001, C01C 3/002 take precedence)}
References
Limiting references

This place does not cover:

Preparation by decomposition of nitrogen containing organic compounds:

C01C 3/001

Preparation from elementary nitrogen or carbides:

C01C 3/002

Cyanic {or isocyanic} acid; Salts thereof {(C01C 3/001 takes precedence)}
References
Limiting references

This place does not cover:

Preparation by decomposition of nitrogen containing organic compounds:

C01C 3/001

Glossary of terms

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

Cyanic acid

HOCN

Isocyanic acid

HNCO

{Isocyanic acid; Salts thereof}
Glossary of terms

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

Isocyanic acid

HNCO

Cyanamide; Salts thereof ({C01C 3/001, C01C 3/002 takes precedence}; dicyandiamide C07C 279/28)
References
Limiting references

This place does not cover:

Preparation by decomposition of nitrogen containing organic compounds:

C01C 3/001

Preparation from elementary nitrogen or carbides:

C01C 3/002

Dicyanamide:

C07C 279/28

Glossary of terms

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

Cyanamide

H2NCN

Calcium cyanamide
Glossary of terms

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

Calcium cyanamide

CaNCN

Thiocyanic acid; Salts thereof {(C01C 3/001 takes precedence)}
References
Limiting references

This place does not cover:

Preparation by decomposition of nitrogen containing organic compounds:

C01C 3/001

Glossary of terms

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

Thiocyanic acid

hydrogen thiocyanate

Synonyms and Keywords

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

Thiocyanic acid

HSCN