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:
Nov. 08, 2022
Filed:
Dec. 03, 2019
Applicant:
Air Liquide Advanced Technologies Us Llc, Houston, TX (US);
Inventors:
Paul Terrien, Syracuse, NY (US);
Alex Augustine, King of Prussia, PA (US);
Kevin Weatherford, Houston, TX (US);
Yong Ding, Waban, MA (US);
Assignee:
Air Liquide Advanced Technologies U.S. LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/22 (2006.01); B01D 71/70 (2006.01); C07C 7/144 (2006.01); C10L 3/10 (2006.01);
U.S. Cl.
CPC ...
B01D 53/226 (2013.01); B01D 71/70 (2013.01); C07C 7/144 (2013.01); C10L 3/105 (2013.01); C10L 2290/548 (2013.01);
Abstract
A feed containing methane and nitrogen gas is processed in a three-stage membrane system, each stage of which is selective for methane over nitrogen. The methane enriched permeate from the first stage is removed as product gas. The methane-depleted residue from the second stage is purified in second and third cascaded stages to provide second and third permeates and second and third residues. The third stage permeate is recycled to the feed.