The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2022
Filed:
Dec. 17, 2018
L'air Liquide, Société Anonyme Pour L'etude ET L'exploitation Des Procédés Georges Claude, Paris, FR;
Paul Terrien, Houston, TX (US);
Nicolas Chantant, Grenoble, FR;
Abstract
A process for producing biomethane by scrubbing a biogas feed stream includes introducing the feed gas stream into a pretreatment unit wherein a CO-depleted gas stream is partially separated from a COstream and an oxygen stream and is compressed to a pressure P1 above 25 bar abs. Subjecting the CO-depleted gas stream to cryogenic separation in a distillation column to separate a nitrogen stream and produce a CH-enriched stream, the distillation column comprising n plates, n being an integer between 8 and 100. Recovering a pressurized CH-enriched stream by pumping the CO-depleted gas stream to a pressure P2 above 25 bar absolute.