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. 20, 2018
Filed:
Jun. 24, 2009
Applicants:
Andrew James Seeley, Bristol, GB;
Robert Bruce Grant, Steyning, GB;
Inventors:
Andrew James Seeley, Bristol, GB;
Robert Bruce Grant, Steyning, GB;
Assignee:
Edwards Limited, Burgess Hill, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/08 (2006.01); B01D 53/14 (2006.01); C01B 3/50 (2006.01); C01B 3/52 (2006.01); F25J 3/02 (2006.01);
U.S. Cl.
CPC ...
B01D 53/14 (2013.01); C01B 3/506 (2013.01); C01B 3/52 (2013.01); F25J 3/0252 (2013.01); F25J 3/08 (2013.01); B01D 2252/20 (2013.01); B01D 2256/10 (2013.01); B01D 2256/16 (2013.01); B01D 2257/553 (2013.01); B01D 2258/0216 (2013.01); C01B 2203/0415 (2013.01); C01B 2203/0465 (2013.01); F25J 2205/30 (2013.01); F25J 2215/10 (2013.01); F25J 2280/10 (2013.01);
Abstract
At least one gaseous impurity, for example silane, is removed by absorption from a feed gas stream, for example a gas stream comprising nitrogen and hydrogen, the gaseous impurity being less volatile than the feed gas stream. The absorption is effected by a sub-cooled absorbent at a first cryogenic temperature and a first pressure. The absorbent is typically propane. The absorption may be conducted in a liquid-vapor contact column (). Absorbent containing impurity may be regenerated in a regeneration vesseland returned to the column ().