| 摘要 |
1,222,101. Separation of liquids. ABCOR, Inc. 14 Feb., 1968, No. 7265/68. Heading BIX. i[Also in Division C5] A liquid feed mixture is separated by permeation through a semi-permeable membrane into a permeate-enriched liquid fraction and a permeate-lean liquid fraction 'by a process which comprises contacting the liquid feed mixture at a predetermined temperature with one face of the membrane, sweeping the permeate-enriched fraction from the other face of the membrane with a sweep liquid to form a liquid effluent stream comprising the sweep liquid as one component and the permeate enriched fraction as the other component, the sweep liquid being a solvent for the permeateenriched fraction and having a volatility different from the volatility of that fraction, withdrawing the liquid effluent stream and vaporising one of the two said components of the liquid effluent stream by supplying to the liquid effluent stream substantially only the latest heat of vaporisation of that component. The process may be used for separating mixtures of meta and para xylene, or butene-1 and isobutene. |
