CRYSTALLIZATION METHOD FOR SOLID/LIQUID SEPARATION OF FLUOROSUCCINIC ACID COMPOUND

摘要

PROBLEM TO BE SOLVED: To provide a crystallization method for easily the solid/liquid separation of a fluorosuccinic acid compound useful as an additive for of a surfactant for silver halide used as photosensitive materials. SOLUTION: This method comprises crystallizing the compound of general formula (1) (where, n1 and n2 are each an integer of 1-5; A is SO3 M; and M is a cation) in an aqueous alcohol-solvent so as to enable solid/liquid separation thereof.