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:
Jun. 16, 2020
Filed:
Apr. 24, 2018
Applicant:
Mexichem Amanco Holding S.a. DE C.v., Tlalnepantla, MX;
Inventors:
John W Smith, Cheshire, GB;
Claire McGuinness, Cheshire, GB;
Andrew P Sharratt, Cheshire, GB;
Andrew M Taylor, Chester, GB;
Assignee:
MEXICHEM AMANCO HOLDING S.A. DE C.V., Tlalnepantla, MX;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/25 (2006.01); C07C 17/354 (2006.01); C07C 21/18 (2006.01);
U.S. Cl.
CPC ...
C07C 17/25 (2013.01); C07C 17/354 (2013.01); C07C 21/18 (2013.01);
Abstract
The invention provides a process for the preparation of 1234yf comprising (a) contacting 1,1,2,3,3,3-hexafluoropropene (1216) with hydrogen in the presence of a hydrogenation catalyst to produce 1,1,2,3,3,3-hexafluoropropane (236ea); (b) dehydrofluorinating 236ea to produce 1,2,3,3,3-pentafluoropropene (1225ye); (c) contacting 1225ye with hydrogen in the presence of a hydrogenation catalyst to produce 1,2,3,3,3-pentafluoropropane (245eb); and (d) dehydrofluorinating 245eb to produce 1234yf.