METHOD OF INCREASING PRODUCTIVITY OF CARBONYLATING CATALYST SOLUTION BY REMOVING CORROSION METALS Russian patent published in 2000 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: improvement of methanol-to-low watered acetic acid carbonylation process in presence of rhodium-containing catalyst and alkali metal component for removing metal corrosion products consists in bringing catalyst solution into contact with ion-exchange resin, advantageously in lithium form, and water in amount high enough to reduce concentration of alkali metal ions in order to optimize removal of metal corrosion products. EFFECT: enhanced catalytic process efficiency. 15 cl, 2 tbl, 13