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. 23, 2001
Filed:
Jul. 14, 1994
Applicant:
Inventors:
Michael R. Woolery, Marlvern, AR (US);
Ledell Rigsby, Hot Springs, AR (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 3/400 ; C22B 2/300 ; C22B 2/600 ;
U.S. Cl.
CPC ...
C22B 3/400 ; C22B 2/300 ; C22B 2/600 ;
Abstract
High yields of vanadium containing virtually no nickel or magnesium are obtained from natural bitumen ash consisting of up to 5% carbon, more than 95% of water-soluble compounds of vanadium, nickel and magnesium by mixing the ash with water to produce a 20% solids slurry of pH below 6.5 and temperature of 80-85° C. oxidizing any reduced vanadium in the slurry and then separating and removing the resulting polyvanadate precipitate from the liquid phase containing substantially all the nickel and magnesium values of the ash.