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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 9809515 B1

PDFFull Text
Expired
Date of Patent:
Nov. 07, 2017

Filed:

Sep. 29, 2016

Dehydrofluorination of pentafluoroalkanes to form tetrafluoroolefins

Applicant:

Arkema Inc., King of Prussia, PA (US);

Inventors:

Maher Y. Elsheikh, Wayne, PA (US);

Philippe Bonnet, Lyons, FR;

Olga C. N. Keeley, San Francisco, CA (US);

Benjamin Bin Chen, Wayne, PA (US);

Assignee:

Arkema Inc., King of Prussia, PA (US);

Attorney:

Steven D. Boyd

Primary Examiner:

Medhanit Bahta

Int. Cl.
CPC ...
C07C 17/25 (2006.01); C07C 21/18 (2006.01); B01J 23/26 (2006.01); B01J 27/132 (2006.01); B01J 37/08 (2006.01); B01J 21/18 (2006.01); B01J 37/00 (2006.01); B01J 37/14 (2006.01);
U.S. Cl.
CPC ...
C07C 17/25 (2013.01); B01J 21/18 (2013.01); B01J 23/26 (2013.01); B01J 27/132 (2013.01); B01J 37/0018 (2013.01); B01J 37/0072 (2013.01); B01J 37/08 (2013.01); B01J 37/14 (2013.01);
Abstract

A method for producing a tetrafluoroolefin, such as 2,3,3,3-tetrafluoropropene (HFO-1234yf), comprises dehydrofluorinating a pentafluoroalkane in a gas phase in the presence of a catalyst comprising chromium oxyfluoride. In a preferred embodiment, 2,3,3,3-tetrafluoropropene (HFO-1234yf) is produced by forming a catalyst comprising chromium oxyfluoride by calcining CrF.xHO, where x is 1-10, in the presence of a flowing gas comprising nitrogen to form a calcined chromium oxyfluoride, and dehydrofluorinating 1,1,1,2,2-pentafluoropropane (HFC-245cb) in a gas phase in the presence of the catalyst to form the 2,3,3,3-tetrafluoropropene (HFO-1234yf).

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Elsheikh, Maher. (2017). Dehydrofluorination of pentafluoroalkanes to form tetrafluoroolefins (U.S. Patent No. 9809515). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9809515

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