Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts

Introduced: July 1974

Of 17 combined children, 13 exist in both systems.

4 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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B01J 37/0009 +3 CPC CPC only CPC only
B01J 37/0072 CPC only CPC only
B01J 37/0081 CPC only CPC only
B01J 37/009 CPC only CPC only
B01J 37/02 Impregnation, coating or precipitation ( ; protection by coating B01J33/00) since 1974 +6 CPC −1 IPC IPC+CPC Available in IPC and CPC
B01J 37/04 Mixing since 1974 IPC+CPC Available in IPC and CPC
B01J 37/06 Washing since 1974 IPC+CPC Available in IPC and CPC
B01J 37/08 Heat treatment since 1974 +1 CPC IPC+CPC Available in IPC and CPC
B01J 37/12 Oxidising since 1974 IPC+CPC Available in IPC and CPC
B01J 37/16 Reducing since 1974 IPC+CPC Available in IPC and CPC
B01J 37/20 Sulfiding since 1974 IPC+CPC Available in IPC and CPC
B01J 37/22 Halogenating since 1974 IPC+CPC Available in IPC and CPC
B01J 37/28 Phosphorising since 1974 IPC+CPC Available in IPC and CPC
B01J 37/30 Ion-exchange since 1974 IPC+CPC Available in IPC and CPC
B01J 37/32 Freeze drying, i.e. lyophilisation since 1974 IPC+CPC Available in IPC and CPC
B01J 37/34 Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves since 1974 +3 CPC IPC+CPC Available in IPC and CPC
B01J 37/36 Biochemical methods since 1974 IPC+CPC Available in IPC and CPC