Process for the preparation of metal-free phthalocyanine

Details Process for the preparation of metal-free phthalocyanine Process for the preparation of metal-free phthalocyanine

1973-12-19

1976-12-21

Moatz, Harry I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 4708

Patent

active

039988392

ABSTRACT:
Process for the preparation of metal-free phthalocyanine, wherein 4 moles of phthalonitrile are reacted with 0.05 to 0.3 mole of anhydrous alkali sulphide in an inert organic solvent having a boiling point higher than 130.degree. C, in the presence of 0.5 to 3 equivalents of an alcohol having a boiling point higher than 130.degree. C, at temperatures of between 100.degree. C and the boiling point of the solvent and alcohol, respectively.

REFERENCES:
patent: 2699441 (1955-01-01), Wittstein
patent: 3060189 (1962-10-01), Stocker et al.

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