PROCESS AND SYSTEM FOR THE SEPARATION AND DRYING OF CARBOXYLIC ACID CRYSTALS

摘要

A process for the separation and drying of crude carboxylic acid crystals from a slurry in a solvent is described. The process comprises the steps of: supplying the slurry comprising crystals of carboxylic acid to a filter operating at pressure and at a temperature above the atmospheric boiling point of the solvent; removing a cake of separated crystals from said filter; and passing said cake to a thermal dryer. Also described is a system for the separation and drying of crude carboxylic acid from a slurry in a solvent comprising: a pressure filter device comprising a slurry inlet and an outlet for a cake of carboxylic acid crystals; and a thermal dryer and means for transporting the cake of carboxylic acid crystals from the pressure filter device to the dryer; wherein said pressure filter device is configured to operate at a pressure and temperature above the atmospheric boiling point of the solvent.