DIFF Subgroup
C01B 25/18 Phosphoric acid
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Phosphorus; Compounds thereof > Oxyacids of phosphorus; Salts thereof > Phosphoric acid
CPC:
Phosphorus; Compounds thereof ( , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16) > Oxyacids of phosphorus; Salts thereof (peroxyacids or salts thereof C01B15/00) > Phosphoric acid
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C01B 25/20 Preparation from elemental phosphorus or phosphoric anhydride IPC+CPC Available in IPC and CPC
- C01B 25/22 Preparation by reacting phosphate-containing material with an acid, e.g. wet process +2 CPC IPC+CPC Available in IPC and CPC
- C01B 25/234 Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46) since 1980 +1 CPC IPC+CPC Available in IPC and CPC