Patent ID: 9746790
Date: 2017-08-29
CPC Classifications: G03G

Claim:
1. A method for producing a chlorogallium phthalocyanine crystal represented by formula (1) in which at least one organic compound selected from N,N-dimethylformamide and dimethyl sulfoxide is comprised, the method comprising: a synthesis step of synthesizing a chlorogallium phthalocyanine crystal by reacting a gallium compound and a compound that forms a phthalocyanine ring in a chlorinating aromatic compound; an acid pasting step of obtaining a hydroxygallium phthalocyanine crystal by performing an acid pasting treatment in which the chlorogallium phthalocyanine crystal obtained in the synthesis step is mixed with sulfuric acid; a hydrochloric acid treatment step of obtaining a chlorogallium phthalocyanine crystal by mixing the hydroxygallium phthalocyanine crystal obtained in the acid pasting step with an aqueous hydrochloric acid solution; and a wet milling step of obtaining a chlorogallium phthalocyanine crystal by mixing the chlorogallium phthalocyanine crystal obtained in the hydrochloric acid treatment step with at least one organic compound selected from N,N-dimethylformamide and dimethyl sulfoxide and performing a wet milling treatment, wherein a content of the organic compound comprised in the chlorogallium phthalocyanine crystal represented by the formula (1) is 0.10 mass % or more and 0.80 mass % or less based on a content of the chlorogallium phthalocyanine crystal represented by the formula (1), where X