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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 8835699 B1

PDFFull Text
Date of Patent:
Sep. 16, 2014

Filed:

Apr. 01, 2013

Process for preparing r-1234yf by base mediated dehydrohalogenation

Applicant:

Mexichem Amanco Holding S.a. DE C.v., Tlalnepantla, MX;

Inventors:

Andrew Paul Sharratt, Cheshire, GB;

Robert Elliott Low, Cheshire, GB;

John Charles McCarthy, Cheshire, GB;

Assignee:

Mexichem Amanco Holding S.A. de C.V, Tlalnepantla, MX;

Attorney:

Ryan Kromholz & Manion, S.C.

Primary Examiner:

Sudhakar Katakam

Int. Cl.
CPC ...
C07C 21/20 (2006.01); C07C 17/25 (2006.01); C07C 17/20 (2006.01); C07C 17/18 (2006.01); C07C 17/04 (2006.01); C07C 17/275 (2006.01); C07C 45/63 (2006.01);
U.S. Cl.
CPC ...
C07C 17/25 (2013.01); C07C 17/206 (2013.01); C07C 17/18 (2013.01); C07C 17/04 (2013.01); C07C 17/275 (2013.01); C07C 45/63 (2013.01);
Abstract

The invention relates to a process for preparing 2,3,3,3-tetrafluoropropene (CFCF═CH), performed using the steps of dehydrohalogenating 1,1,1,2,2-pentafluoropropane (CHCFCF, HFC-245ca) 1,1,1,2-tetrafluoro-2-chloropropane, 1,1,1,2,3-pentafluoropropane (CHFCHFCF, HFC-245eb) and/or 1,1,1,2-tetrafluoro-3-chloropropane in the presence of a base, and converting a trifluorodichloropropane or a difluorotrichloropropane or a fluorotetrachloropropane to CHCFCF, 1,1,1,2-tetrafluoro-2-chloropropane, CHFCHFCF, and/or 1,1,1,2-tetrafluoro-3-chloropropane.

Find Patent Forward Citations

Sharratt, Andrew. (2014). Process for preparing r-1234yf by base mediated dehydrohalogenation (U.S. Patent No. 8835699). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8835699

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