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:
Jun. 05, 2018
Filed:
Sep. 11, 2014
Applicant:
L'air Liquide, Societe Anonyme Pour L'etude ET L'exploitation Des Procedes Georges Claude, Paris, FR;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 7/144 (2006.01); B01D 53/22 (2006.01);
U.S. Cl.
CPC ...
C07C 7/144 (2013.01); B01D 53/226 (2013.01); B01D 2256/22 (2013.01); B01D 2256/245 (2013.01); B01D 2257/504 (2013.01); B01D 2257/708 (2013.01); B01D 2257/80 (2013.01); B01D 2258/05 (2013.01); Y02C 10/10 (2013.01);
Abstract
A four-stage membrane separation unit purification process, especially for prepurified biogas, in which a retentate from the first stage is fed as feed gas to a second stage, a permeate from the first stage is fed as feed gas to a third stage, a retentate from the third stage is fed as feed gas to a fourth stage.