Separation of organic liquid from mixture employing porous polymeric ultrafiltration membrane

摘要

A process for separating and condensing at least one selected organic liquid from a feed comprising a mixture thereof in the state of one phase or two phases which comprises conducting ultrafiltration by using a polymeric porous membrane having a mean pore size(2 &upbar& r ) of at least 10-6cm and a porosity (Pr) of at least 50% under the conditions that the effective pressure gradient ( DELTA P/d) loaded on the polymeric porous membrane satisfies the following equations: DELTA P/d<1000(cmHg/cm) (1) and DELTA P/d