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:
Apr. 15, 2014
Filed:
Aug. 19, 2013
Applicants:
John W. Smith, Cheshire, GB;
Claire Mcguiness, Cheshire, GB;
Andrew P. Sharratt, Cheshire, GB;
Inventors:
Assignee:
Mexichem Amanco Holding S.A. de C.V., Tlalnepantla, MX;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 19/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CFCHFCHX, wherein X is Cl or F, and (b) dehydrohalogenating the compound of formula CFCHFCHX to produce 1234yf.