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.:

US 7431865 B1

PDF
Full Text
Expired
Date of Patent:
Oct. 07, 2008

Filed:

May. 30, 2002
Applicants:

Andrew Mark Ward, Cleveland, GB;

Alan Bruce Briston, Cleveland, GB;

Inventors:

Andrew Mark Ward, Cleveland, GB;

Alan Bruce Briston, Cleveland, GB;

Assignee:

Johnson Matthey PLC, London, GB;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/24 (2006.01); C01B 3/26 (2006.01);
U.S. Cl.
CPC ...
Abstract

Ammonia synthesis gas production having a shift reaction stage employing a copper-based catalyst wherein the air supplied to the process is passed through an absorber that removes sulfur and/or halide contaminants, is described. The absorber has a support carrying an absorbent for sulfur compounds and/or absorbent for halide compounds. The removal of the contaminants improves the lifetime e.g. copper-zinc low temperature shift catalysts.


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Ward, Andrew. (2008). Production of ammonia synthesis gas (U.S. Patent No. 7431865). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7431865

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