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. 18, 1980
Filed:
Apr. 06, 1978
Applicant:
Inventors:
John T Lileck, Tamaqua, PA (US);
John Papinsick, Summit Hill, PA (US);
Edward J Steigerwalt, Lehighton, PA (US);
Assignee:
Air Products & Chemicals, Inc., Allentown, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423406 ; 423240 ; 423489 ;
Abstract
This invention relates to a process for purifying a nitrogen trifluoride containing atmosphere contaminated with dinitrogen difluoride. The atmosphere is purified by heating the nitrogen trifluoride atmosphere in the presence of a particulate metal capable of defluorinating dinitrogen difluoride, but inert to nitrogen trifluoride, preferably the metal being selected from the group consisting of iron, cobalt, and nickel, to a temperature of from about 300.degree.-1000.degree. F. for a time sufficient to effect defluorination of the dinitrogen difluoride.