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. 27, 1979
Filed:
Apr. 27, 1978
William B Darlington, Portland, TX (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
Disclosed is a method of electrolyzing an alkali metal chloride brine in an electrolytic cell by feeding an aqueous alkali metal chloride brine containing less than 20 parts per billion dissolved alkaline earth metal ions, e.g., calcium, to the anolyte compartment of an electrolytic cell. Also disclosed is an alkali metal chloride brine containing less than 20 parts per billion of alkaline earth metal ions, e.g., calcium ion. There is also disclosed a method of purifying alkaline earth metal-containing brines, e.g., calcium-containing brines, by maintaining the brine alkaline, adding a phosphate to the alkaline brine whereby to form a calcium compound substantially insoluble in brine and thereafter separating the compound from the brine.