Abstract: Process for reducing the cloud point of a base oil having a kinematic viscosity at 100° C. of greater than 10 cSt by separating the molecules inferring the high cloud point from the base oil by means of a membrane separation wherein the feed is separated into a a permeate as the base oil having the reduced cloud point and a retentate.

Abstract: A process for permeation enhanced reactive extraction of levulinic acid from a liquid aqueous phase comprising levulinic acid, wherein the levulinic acid from the aqueous phase is brought into contact with a liquid alcohol phase at esterification conditions in the presence of a catalyst at a temperature in the range of from 50 to 250° C., the aqueous phase and the alcohol phase being separated from each other by a membrane, and an aqueous stream depleted in levulinic acid and an alcohol stream comprising ester of levulinic acid are formed.

Abstract: The invention relates to a method for separating organic acid from an organic hydroperoxide stream by bringing the hydroperoxide stream into contact with an extraction fluid, in which process the extraction fluid and the hydroperoxide stream are separated from each other by a membrane.