Process for the preparation of phthalocyanine pigments

Details Process for the preparation of phthalocyanine pigments Process for the preparation of phthalocyanine pigments

1979-02-14

1980-12-16

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106288Q, C09B 4704

Patent

active

042396859

ABSTRACT:
A process for the preparation of phthalocyanine pigments from a phthalocyanine press paste obtained by hydrolysis of a sulphuric solution of phthalocyanine, in which a small quantity of a water-insoluble crystallizing solvent, in the presence or absence of a non-crystallizing solvent, is incorporated with stirring in said press paste, and then the solvent or solvents is or are eliminated and the paste is dried, and the pigments thus obtained are collected.

REFERENCES:
patent: 2540775 (1951-02-01), Brouillard et al.
patent: 2699442 (1955-01-01), Eastes et al.
patent: 3150150 (1964-09-01), Brand
patent: 3717493 (1973-02-01), Griswold
patent: 3801591 (1974-04-01), Jackson
patent: 3944564 (1976-03-01), Hanke
patent: 4056534 (1977-11-01), Schiessler et al.

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