Exxonmobil Chemical Patents Inc.

Novomer, Inc.

Keith Dackson

Pradeep P Shirodkar

Gary Michael Diamond

Thomas E Nowlin

Robert I Mink

Jill H Paul

Jill Helaine Paul

Lawrence T Kale

Provided herein are membrane separation systems and methods suitable for use in separating carbonylation catalyst from a beta-lactone product stream. Such membrane separation systems utilize a cross flow separation technique and employ a sweep stream.

Membrane separation system, and uses thereof

An ethylene/&#x3b1;-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an &#x3b1;-olefin content of 5 to 20 percent by weight and shows at least two CRYSTAF peak temperatures differing by at least 15&#xb0; C. and/or at least two DSC melting peak temperatures differing by at least 15&#xb0; C.

Ethylene/&#x3b1;-olefin copolymer made with a non-single-site/single-site catalyst combination, its preparation and use

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East Aurora, NY, United States of America

Keith Dackson