Purification of C.I. solvent black 3

Details Purification of C.I. solvent black 3 Purification of C.I. solvent black 3

1989-04-28

1990-05-22

Cintins, Ivars

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210669, 534887, B01D 1104

Patent

active

049275380

ABSTRACT:
The present invention provides a process for highly purifying C.I. Solvent Black 3 using specific aromatic hydrocarbons or petroleum hydrocarbons. The process comprises dissolving C.I. Solvent Black 3 represented by ##STR1## in an organic solvent selected from the group consisting of aromatic hydrocarbons having 6 to 12 carbon atoms and petroleum hydrocarbons having 6 to 10 carbon atoms followed by filtering, and then removing the solvent.

REFERENCES:
patent: 4224071 (1980-09-01), Buell

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