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:
Mar. 04, 2003
Filed:
Mar. 20, 2000
Satoru Kohno, Settsu, JP;
Takashi Shibanuma, Settsu, JP;
Daikin Industries Ltd., Osaka, JP;
Abstract
A method for efficiently separating pentafluoroethane (HFC-125) from a mixture thereof with chloropentafluoroethane (CFC-115). This method is performed by subjecting a mixture ( ) of HFC-125 ( ) and CFC-115 ( ) to extractive distillation ( ) to give highly concentrated HFC-125 ( ). A hydrofluorocarbon compound ( ) having two carbon atoms, particularly 1,1,1,2-tetrafluoroethane, is used as an extractant to obtain concentrated CFC-115 as a distillate and a mixture of HFC-125 having a reduced content of CFC-115 with the extractant as a bottom ( ), the extractant being separated from HFC-124 in this mixture by distillation ( ) and reused in the extractive distillation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile