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:
Feb. 01, 2005
Filed:
Feb. 27, 2001
Shigeyuki Yoshii, Settsu, JP;
Yukio Homoto, Settsu, JP;
Shigeyuki Yoshii, Settsu, JP;
Yukio Homoto, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
There is provided a process for recovering tetrafluoroethylene wherein an amount of energy required to obtain TFE is reduced. In the process for producing a TFE mixture as an intended mixture which contains TFE at a higher concentration from a raw material mixture () which contains TFE, a component of which boiling point is lower than that of TFE and a component of which boiling point is higher than that of TFE, (1) the raw material is subjected to a preliminary distillation treatment () so as to obtain (a) a first fraction () which contains at least a portion of the component of which boiling point is higher than that of TFE and (b) a second fraction () as the balance which contains TFE and the component of which boiling point is lower than that of TFE, and then (2) the second fraction is subjected to a main distillation treatment () so as to obtain (c) a third faction () formed by distilling off the component of which boiling point is lower than that of TFE, and (d) a fourth fraction () as the intended mixture being the balance which contains TFE.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile