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:
May. 04, 1982
Filed:
Feb. 27, 1980
Applicant:
Inventor:
Harold V Larson, Houston, TX (US);
Assignees:
Olin Corporation, New Haven, CT (US);
United States Gypsum Company, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ; C01F / ; C01B / ;
U.S. Cl.
CPC ...
423166 ; 423-2 ; 423167 ; 423249 ; 423319 ; 4233 / ; 423555 ;
Abstract
Disclosed is a method for treating substantially homogeneous monocalcium phosphate (MCP) solutions that contain undesirable amounts of radium which comprises centrifuging these MCP solutions sufficiently to separate at least a portion of the radium from the solution. Such treated MCP solutions may then be reacted with sulfuric acid to simultaneously produce a phosphoric acid solution and a calcium sulfate precipitate such as gypsum having low levels of radium content.