METHOD OF PRODUCING METHANOL, ETHANOL, N-PROPANOL, AND ISOBUTYL ALCOHOL STREAMS FOR USE CHIEFLY IN PRODUCTION OF ANTI-KNOCK PRODUCTS FROM MIXTURES CONTAINING ABOVE-MENTIONED ALCOHOLS, WATER, AND OTHER LOW- AND HIGH-BOILING SUBSTANCES Russian patent published in 1998 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: mixture is separated into three streams. The first one, waterless, mainly consists of methanol or methanol and ethanol; the second one contains most of n-propanol contained in original mixture; and the third stream contains most of isobutyl alcohol contained in original mixture. Separation is performed using three rectification columns, stream I being bled from side point of the first column, stream II from the top of the second column, and stream III from the still of the second column. EFFECT: enhanced separation efficiency. 11 cl, 1 dwg, 2 tbl