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. 16, 1979
Filed:
Nov. 03, 1977
Applicant:
Inventor:
William W Carlin, Portland, TX (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ;
U.S. Cl.
CPC ...
204 89 ; 423596 ; 75 / ; 75-2 ;
Abstract
Disclosed is a method of opening iron oxide-chromic oxide ores of trivalent chromium by contacting the ore with an aqueous alkali metal hypochlorite bleach and recovering a liquid containing hexavalent chromium from the reaction media. The hexavalent chromium produced by the bleaching action is normally in the form of alkali metal chromate. According to a preferred exemplification, the alkali metal chromate is electrolytically converted to an alkali metal dichromate.