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Membrane Separation Of A Metathesis Reaction Mixture

United States Patent Application

20080103346
A1
View the Complete Application at the US Patent & Trademark Office
A process for separating a homogeneous metathesis catalyst and, optionally, one or more homogeneous metathesis catalyst degradation products from a metathesis reaction mixture containing in addition to said metathesis catalyst and said metathesis catalyst degradation product(s), one or more olefin metathesis products, one or more unconverted reactant olefins, and optionally, a solvent. The process involves contacting the metathesis reaction mixture with a nanofiltration membrane, such as a polyimide nanofiltration membrane, so as to recover a permeate containing a substantial portion of the olefin reaction products, the unconverted reactant olefins, and optional solvent, and a retentate containing the metathesis catalyst, and optionally, metathesis catalyst degradation product(s). In another aspect, this invention pertains to a continuous metathesis reaction-catalyst separation process, preferably, conducted in a nanofiltration membrane reactor.
Burdett, Kenneth A. (Midland, MI), Collins, Baymond M. (Midland, MI), Maughon, Bob R. (Midland, MI), Tulchinsky, Michael L. (Midland, MI)
DOW GLOBAL TECHNOLOGIES, INC. (Midland MI)
11/ 665,723
October 14, 2005
[0002] This invention was made with United States Government support under Award Number DE-FC36-01ID14213 (formerly Award Number DE-FC07-01ID14213) funded by the Department of Energy. The United States Government has certain rights in this invention.