Process for the preparation of copper phthalolcyanine

Details Process for the preparation of copper phthalolcyanine Process for the preparation of copper phthalolcyanine

1977-03-16

1978-10-03

Ford, John M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 4704

Patent

active

041183916

ABSTRACT:
The production of copper phthalocyanine in accordance with German Offenlegungsschrift No. 2,432,564 is improved by the process which is characterized in that the reaction product formed at 130.degree.-300.degree. C from optionally substituted phthalic anhydride, reaction products of optionally substituted phthalic anhydride with ammonia, or the dehydration products thereof, urea and, optionally, a catalyst is reacted with a copper salt and, optionally, a catalyst at temperatures of 150.degree.-350.degree. C and preferably 170.degree.-300.degree. C with the proviso that the catalyst is added either during the preparation of the starting material or during the reaction with the copper salt.

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