US Patent Issued to Air Products and Chemicals on July 22 for "Low temperature membrane process for biogas upgrading" (Missouri Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,640, issued on July 22, was assigned to Air Products and Chemicals Inc. (Allentown, Pa.).

"Low temperature membrane process for biogas upgrading" was invented by Matthew P. O'Brien (House Springs, Mo.) and Paul W. Kramer (Ellisville, Mo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for separating a raw feed gas stream utilizes a compressor, a chiller, a membrane drying stage, and a plurality of membrane separation stages. The raw feed gas stream may comprise biogas. In one example, the raw feed gas stream is supplied to the chiller where it is cooled to a target operating temperature to separate out condensed water. The gas stream is then...