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:
Apr. 21, 1981
Filed:
Apr. 09, 1979
Applicant:
Inventors:
Raymond D Symens, Lakewood, CO (US);
Robert S Rickard, Golden, CO (US);
Assignee:
Earth Sciences, Inc., Golden, CO (US);
Primary Examiner:
Int. Cl.
CPC ...
B03D / ; C01B / ;
U.S. Cl.
CPC ...
210705 ; 210727 ; 4233 / ; 4233 / ;
Abstract
A process is disclosed for removing colloidal and non-colloidal humic matter from an aqueous solution of phosphoric acid, the process comprising (a) treating the phosphoric acid solution with a flocculant to flocculate the humic matter, (b) adding to the aqueous solution an effective amount of a phenol compound in order to destabilize the colloidal humic matter contained in the solution and to aid in the formation of froth, and (c) separating the humic matter from the solution by froth flotation.