Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Treatment or purification of solutions, e.g. obtained by leaching

CPC: Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Extraction of metal compounds from ores or concentrates by wet processes > Treatment or purification of solutions, e.g. obtained by leaching

CPC:

Extraction of metal compounds from ores or concentrates by wet processes > Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence)

Of 5 combined children, 4 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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C22B 3/205 CPC only CPC only
C22B 3/22 by physical processes, e.g. by filtration, by magnetic means (treatment or purification of solutions by liquid-liquid extraction C22B3/26) since 1990 IPC+CPC Available in IPC and CPC
C22B 3/26 by liquid-liquid extraction using organic compounds since 1990 +6 CPC IPC+CPC Available in IPC and CPC
C22B 3/42 by ion-exchange extraction since 1990 IPC+CPC Available in IPC and CPC
C22B 3/44 by chemical processes (treatment or purification of solutions by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42) since 1990 IPC+CPC Available in IPC and CPC