Process for preparing metal phthalocyanine compounds

Details Process for preparing metal phthalocyanine compounds Process for preparing metal phthalocyanine compounds

1978-12-29

1980-11-18

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 4724

Patent

active

042344867

ABSTRACT:
There is described a novel process for preparing metal phthalocyanine compounds which can be hydrolyzed to form dye developers which are useful in photographic products and processes. Initially a metal phthalocyaninetetrasulfonyl halide intermediate is formed and a partial solvent for the intermediate is added to the reaction mixture which is then quenched in water to provide a three component emulsion. The intermediate is amidated directly without being isolated from emulsion. The final product is recovered and, in a preferred embodiment, is purified to provide a highly pure material which can be hydrolyzed to form a dye developer suitable for use in photographic products and processes such as diffusion transfer photographic products and processes.

REFERENCES:
patent: 3888875 (1975-06-01), Bader et al.
patent: 3888876 (1975-06-01), Bader et al.

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