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:
Jan. 13, 1976
Filed:
Oct. 21, 1974
Michael A Vertes, Weston, CT (US);
Richard A Ronzio, Golden, CO (US);
Amax Inc., New York, NY (US);
Abstract
A method for purifying technical grade molybdenum oxide derived from the roasting of molybdenite concentrates by which the molybdenum oxide feed material is admixed with sulfuric acid and pugged to form a plurality of reaction pellets which are heated to an elevated temperature to effect a baking and subsequent roasting thereof and a reaction between the metal contaminants and the sulfuric acid to produce aqueous soluble sulfate compounds. The resultant roasted pelletized oxide is ground and leached to remove the contaminating metal sulfates, whereafter the leached pellets are contacted with an aqueous ammoniacal solution for converting the molybdenum oxide constituent therein to ammonium molybdate dissolved in the solution, which is separated from the insoluble residue, which is discarded to waste and the solution is crystallized to recover the ammonium molybdate product which, in turn, may be calcined to produce a high purity molybdenum oxide product.