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:
Oct. 25, 1977
Filed:
Dec. 13, 1976
Applicant:
Inventors:
Rudolph Rosenthal, Broomall, PA (US);
Edward T Shawl, Wallingford, PA (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01G / ;
U.S. Cl.
CPC ...
423509 ; 423604 ;
Abstract
A process for the recovery of selenium from a urethane solution containing selenium compounds which comprises contacting the selenium-containing urethane solution at a suitable temperature with copper (I) chloride, oxygen or an oxygen-containing gas such as air, and a complexing solvent such as an amine or nitrile to form an insoluble precipitate of copper-selenium compounds or complexes. The selenium and copper may be recovered from the resulting precipitate in a form suitable for reuse in the preparation of urethanes and selenium removal respectively.