FIELD: chemistry.
SUBSTANCE: invention relates to a method for acrylamido-2-methylpropanesulfonic acid (A) salts preparation, comprising the following steps: preparation of a solution containing acrylamido-2-methylpropanesulfonic acid (A) salt impurities in an anhydrous organic solvent (L) using at least one basic component (B) selected from the group of alkali metal oxides, alkaline earth metal oxides, alkali metal hydroxides and alkaline earth metal hydroxides, at that, the molar ratio of the compound (A) and the basic component (B) is preferably from 1:1 to 1:3; if necessary, partial removal of the organic solvent (L) at a pressure in the range of 0.001 to 2 bar (abs.); separation of dissolved salts of the compound (A) by crystallization or precipitation as a result of changes in temperature and/or pressure and/or salt concentration in the solution; if necessary, drying of the purified acrylamido-2-methylpropanesulfonic acid (A) salt.
EFFECT: simple method for preparation of acrylamido-2-methylpropanesulfonic acid salts with high purity is provided.
9 cl, 4 dwg, 6 ex
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