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:
Jul. 08, 2014
Filed:
May. 30, 2007
Applicants:
Mark Brandon Shiflett, New Castle, DE (US);
Akimichi Yokozeki, Wilmington, DE (US);
Inventors:
Mark Brandon Shiflett, New Castle, DE (US);
Akimichi Yokozeki, Wilmington, DE (US);
Assignee:
E I du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 21/06 (2006.01); C01B 21/088 (2006.01); C01B 7/00 (2006.01); C01B 9/08 (2006.01); B01D 53/56 (2006.01); B01D 53/86 (2006.01); C01B 21/00 (2006.01); B01D 53/50 (2006.01); B01D 53/68 (2006.01); B01D 53/70 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to a process for purifying at least one of perfluoromethane and nitrogen trifluoride from a mixture thereof using an ionic liquid. The process may be performed by a technique such as extractive distillation or absorption wherein at least one ionic liquid is used as the entraining agent or absorbent, respectively.