PROCESS FOR THE PREPARATIONOF DL-TARTARIC ACID

摘要

1423029 Tartaric acid MITSUBISHI GAS CHEMICAL CO Inc 7 Jan 1974 [13 Jan 1973] 00572/74 Heading C2C dl-Tartaric acid is prepared by hydrolysing epoxysuccinic acid in the presence of at least one compound of aluminium, iron, tin or bismuth. Water-soluble salts, e.g. aluminium or ferric chloride are used in a concentration of 0À01 to 3 mol. per cent in an aqueous (1-10 mol./ litre of water) solution of the acid. The product may be treated with a cation exchange resin, concentrated and the acid crystallized.