FIELD: organic chemistry, analytical chemistry, chemical technology.
SUBSTANCE: process is carried out by preliminary mixing an aqueous solution with N-cetylpyridinium chloride aqueous solution in the ratio of molar concentrations of these solutions = 1:2.5 followed by extraction of aminonaphthol disuldoacids with a mixture consisting of 41.0-41.5 wt.-% of acetone and 58.5-59.0 wt.-% of diacetone alcohol in the presence of a desalting agent added up to saturation and representing ammonium sulfate. Extraction is carried out at pH = 7-8, the solution temperature 37°C and in the volume ratio of solvents mixture and an aqueous solution = 1:10. A single extraction procedure provides 96% extraction of aminonaphthol disulfoacids from aqueous solutions.
EFFECT: improved extraction method.
2 tbl, 13 ex
