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, 1987
Filed:
Dec. 18, 1985
Applicant:
Inventors:
Kent H Carpenter, Ann Arbor, MI (US);
Roger F Sebenik, Ann Arbor, MI (US);
Assignee:
Amax Inc., Greenwich, CT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 84 ; 266905 ;
Abstract
Molybdenum trioxide in granular or powder form is reduced to molybdenum metal by stagewise fluid bed reduction wherein molybdenum trioxide is reduced to molybdenum dioxide using ammonia as the fluidizing-reducing gas at 400.degree. C. to 650.degree. C. and molybdenum dioxide is reduced to metal using hydrogen as the fluidizing-reducing gas at 700.degree. C. to 1400.degree. C. The content of impurities such as lead, zinc, bismuth and copper is reduced during the process.