Processes for recovering metal catalyst from a mother liquor and for producing a stream of superconcentrated mother liquor, streams of superconcentrated mother liquor, raffinate, extract and recovered extraction solvent, and aqueous mixture

摘要

"PROCEDURES FOR RECOVERY OF A MOTHER LIQUOR METAL CATALYST AND FOR THE PRODUCTION OF A SUPERCONCENTRATED MOTHER LIQUOR CURRENT, SUPERCONCENTRATED MOTHER LIQUOR, EXTRACTED AND EXTRACTED SOLVENT MACHINES". Method for removing impurities from a mother liquor comprising a carboxylic acid, a metal catalyst and impurities by (a) evaporating the mother liquor comprising a carboxylic acid, the metal catalyst, impurities, water and a solvent in a first evaporator zone to produce a vapor stream and a concentrated mother liquor stream; (b) evaporating the concentrated mother liquor stream into a second evaporator zone to form a solvent rich stream and a superconcentrated mother liquor stream; (c) separating the organic impurities with a water-solvent solution of the superconcentrated mother liquor into a solid-liquid separation zone to form an aqueous stream and a second aqueous stream; (d) mixing in a mixing zone water and optionally extraction solvent with the aqueous stream and the second aqueous stream to form an aqueous blend; and (e) adding an extraction solvent to the aqueous mixture in an extraction zone to form an extract stream and a raffinate stream.