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:
Nov. 20, 1979
Filed:
Dec. 14, 1977
Applicant:
Inventors:
Theodore F Munday, Kendall Park, NJ (US);
John Walden, Hightstown, NJ (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
423210 ; 423317 ; 423322 ; 4234 / ; 4236 / ;
Abstract
Off gases from electric furnace production of phosphorus, consisting essentially of carbon monoxide and phosphine, are heated to 700.degree.-800.degree. C. to decompose the phosphine to red phosphorus and hydrogen; the red phosphorus is separated from the gas--most desirably by passing the gas through aqueous hydrogen peroxide which oxidizes the phosphorus to phosphoric acid,--to obtain a clean gas which can be used as a fuel.