PROCESS FOR REMOVING IODIDE DERIVATIVES FROM LIQUID ACETIC ACID AND/OR ACETIC ANHYDRIDE Russian patent published in 1995 - IPC

FIELD: purification of acetic acid or acetic anhydride in processes of carbonylation of methanol and/or methyl acetate. SUBSTANCE: iodide derivatives are removed from liquid acetic acid and/or acetic anhydride by reacting liquid acetic acid and/or acetic anhydride with highly acid cation exchange resin having from 4 to 12% of cross links. The surface area of resin in proton- exchange form is at least 10 m²·g^-1 after drying from the water-moistened state and the surface area is more than 10 m²·g^-1 after drying from the moist state in which water is replaced by methanol. At least 1% of active centers is converted to silver form, preferably from 30 to 70% EFFECT: more efficient removal process. 7 cl, 3 tbl