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. 12, 1988
Filed:
Dec. 10, 1986
Applicant:
Inventor:
Srini Vasan, New Canaan, CT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210752 ; 210758 ; 210904 ;
Abstract
A process is described for the treatment of waste liquor containing a mixture of alkali metal or ammonium thiocyanate and polysulfides to convert the latter to the corresponding sulfates. The waste liquor is admixed with concentrated sulfuric acid under turbulent mixing conditions and in an inert atmosphere. The treated liquor is purged of gaseous by-products using an inert gas (e.g. carbon dioxide) and the purged liquor is treated to recover sulfate therefrom.