PRODUCTION OF LOW CRYSTALLINE PHTHALOCYANINE, PRODUCTION OF CRYSTALLINE PHTHALOCYANINE AND CRYSTALLINE PHTHALOCYANINE MIXED CRYSTAL SUBSTANCE USING THE SAME PHTHALOCYANINE AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR USING THE SAME

摘要

PROBLEM TO BE SOLVED: To simply, industrially and advantageously produce the subject phthalocyanine useful as an electrophotographic photoreceptor, etc., by wet dispersing a crystalline phthalocyanine with a dispersion medium containing water. SOLUTION: When crystalline phthalocyanines are wet dispersed, 20-100 wt.% of water is contained in a dispersion medium used for the wet dispersion. A substance prepared by removing an organic compound used as at least the dispersion medium from a hydrous dispersion of a low crystalline phthalocyanine (preferably titanyloxyphthalocyanine, etc.), prepared by the wet dispersion is preferably treated with water and a halogenated hydrocarbon compound or the water and a hydrocarbon compound to produce a crystalline phthalocyanine manifesting peaks at 9.5 deg., 13.5 deg., 14.2 deg., 18.0 deg., 24.0 deg. and 27.2 deg. Bragg angles (2θ±0.2 deg.) for X rays of CuKα1,541Å.