FIELD: chemistry.
SUBSTANCE: present invention pertains to the method of obtaining a carboxylic/diol mixture, without release of dry solid carboxylic acid from a carboxylic acid/solvent suspension. More specifically, the present invention pertains to a method of obtaining a carboxylic acid/diol mixture, where the carboxylic acid is chosen from a group consisting of terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, trimellitic acid and their mixture. The method involves addition of diol for substituting water for precipitation of carboxylic acid, soaked in water, in the mixing zone of carboxylic acid/diol. Carboxylic acid precipitate, soaked in water, is obtained from precipitate of carboxylic acid with a solvent through washing with water.
EFFECT: obtaining a carboxylic acid/diol; release of dry solid carboxylic acid from a suspension of carboxylic acid/solvent.
31 cl, 1 ex, 1 dwg
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