Process for the production of copper phthalocyanine pigment

Details Process for the production of copper phthalocyanine pigment Process for the production of copper phthalocyanine pigment

1995-03-29

1997-02-11

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540122, 540139, 540142, C09B 6750, C09B 4704

Patent

active

056022492

ABSTRACT:
A process for the production of a copper phthalocyanine by a urea method, which enables the production of a highly pure copper phthalocyanine and/or its derivative by a uniform reaction, i.e., is free from problems of an insufficient mixing, nonuniformity in heat transfer and adhesion of the reaction mixture to a reactor wall, the process comprising heating a raw material mixture containing a phthalic acid, a nitrogen source, a copper compound and a catalyst in an inert solvent, the process being carried out in the presence of a surfactant which enables the raw material mixture and a reaction product to be dispersed in the inert solvent while the raw materials are being reacted and which can be removed or deactivated by hydrolysis with an acid or an alkali at a step of purifying the reaction product or forming the reaction product into a pigment after the reaction.

REFERENCES:
patent: 2647127 (1953-07-01), Brouillard
patent: 2668171 (1954-02-01), Compton
patent: 5393339 (1995-02-01), Gerson et al.
patent: 5449774 (1995-09-01), Lambie et al.
Dainichi Color, Patent Abstracts of Japan, vol. 011 No. 315 (C-451) 14 Oct. 1987 JP-A-62 101 659 12 May 1987.

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