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:
Jan. 30, 2001
Filed:
May. 14, 1997
Applicant:
Inventors:
Christopher R. Proulx, Piscataway, NJ (US);
Marioara V. Ionila, Wayne, NJ (US);
Assignee:
Degussa Corporation, Ridgefield Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 1/702 ; C02F 1/72 ; C22B 1/796 ;
U.S. Cl.
CPC ...
C01B 1/702 ; C02F 1/72 ; C22B 1/796 ;
Abstract
A process for the removal of thiosulphate from spent Stretford solution, The process comprises adjusting the spent Stretford solution to an acidic pH, preferably in the range of 1 to 3, and adding a peroxygen compound. The process allows the user to recycle spent Stretford solution in a cost effective manner by taking advantage of previously unknown buffering properties in the solution.