FIELD: chemistry.
SUBSTANCE: invention relates to a method of extracting sulphoacids of metal phthalocyanines from sulpho-mass, obtained through sulphonation of metal phthalocyanines with oleum, in accordance with which extraction is done by mixing sulpho-mass with water or diluted hydrochloric acid in the presence of a high-molecular cationic polymer with the following linear-cyclic structure: 
with molecular weight of 3·105 and taken in amount of 0.3-0.7% of the weight of the sulphonated metal phthalocyanine. Mono- or disulphonic acid of phthalocyanines of copper, cobalt, vanadium and nickel can be obtained using the proposed method. After extraction, the sulphoacid is filtered and washed.
EFFECT: method provides high output of end products in form of free acids and prevents formation of highly mineralised waste water during synthesis.
1 cl, 11 ex
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