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:
Feb. 17, 1976
Filed:
Nov. 14, 1974
Applicant:
Inventor:
Andrew Irwin Bellingham, Artarmon, AU;
Assignee:
Warman Equipment (International) Limited, Artarmon, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ;
U.S. Cl.
CPC ...
423 55 ; 423 58 ;
Abstract
The known process of separating molybdenum from a tungsten-molybdenum containing alkaline solution has been improved by carrying out the chemical reaction between the solution treated with sulphuric acid and an added sodium bisulphide solution in a continuous process within a multi-stage stirred-tank reactor system, whereby the freed hydrogen sulphide is recycled for absorption by the alkaline solution thus reducing substantially the amount of additional sulphuric acid required for the reaction.