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. 05, 2016
Filed:
Jun. 25, 2015
Applicant:
Asahi Glass Company, Limited, Tokyo, JP;
Inventors:
Shoji Furuta, Tokyo, JP;
Tetsuo Otsuka, Tokyo, JP;
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/386 (2006.01); C07C 17/18 (2006.01); C07C 17/395 (2006.01);
U.S. Cl.
CPC ...
C07C 17/386 (2013.01); C07C 17/18 (2013.01); C07C 17/395 (2013.01);
Abstract
To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition containing HFO-1234yf and R40. A method for separating HFO-1234yf containing substantially no R40, which comprises bringing an azeotropic composition or azeotrope-like composition of H FO-1234yf and R40 into contact with a specific extraction solvent.