Patent ID: 9643153
Date: 2017-05-09
CPC Classifications: B01D,B01J,C07D,Y02P

Claim:
1. A method to prepare an epoxidized cyclic unsaturated compound comprising twelve carbon atoms, comprising: epoxidizing a cyclic unsaturated compound comprising 12 carbon atoms with hydrogen peroxide in a two phase organic aqueous system in the presence of a homogeneous catalyst and phase transfer reagent; separating and removing the aqueous phase to obtain an organic phase containing the epoxidized cyclic unsaturated compound comprising twelve carbon atoms, the homogeneous catalyst and the phase transfer reagent; contacting the organic phase with a membrane under a transmembrane pressure of 5 to 80 bar to obtain a permeate comprising the epoxidized cyclic unsaturated compound comprising twelve carbon atoms and a retentate comprising the homogeneous catalyst and phase transfer reagent; wherein the membrane is a composite membrane comprising a support material and a membrane separation-active layer comprising a crosslinked silicone acrylate and the homogeneous catalyst comprises an oxide, a mixed oxide, an oxoacid, a salt of an oxoacid, a carbonyl derivative, a sulphide, a chloride, an oxychloride or a stearate of an element selected from the group consisting of tungsten, molybdenum and vanadium.