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:
Sep. 25, 2012
Filed:
Aug. 24, 2007
Applicants:
Jeffrey P. Knapp, Wilmington, DE (US);
Barry Asher Mahler, Glen Mills, PA (US);
Donald J. Toton, New Castle, DE (US);
Inventors:
Jeffrey P. Knapp, Wilmington, DE (US);
Barry Asher Mahler, Glen Mills, PA (US);
Donald J. Toton, New Castle, DE (US);
Assignee:
E I Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 21/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present disclosure relates to a process for separating a fluoroolefin from a mixture comprising hydrogen fluoride and fluoroolefin, comprising azeotropic distillation both with and without an entrainer. In particular are disclosed processes for separating any of HFC-1225ye, HFC-1234ze, HFC-1234yf or HFC-1243zf from HF.