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:
Aug. 24, 1976
Filed:
Aug. 20, 1975
Applicant:
Inventor:
Svend Aage Markland, Follenslev, DK;
Assignee:
Atomenergikommissionen, , DK;
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
7510 / ; 7510 / ; 75121 ; 423 63 ;
Abstract
The invention is concerned with the recovery and separation of tantalum and/or niobium from a solution of these elements in aqueous mineral acid, preferably sulfuric acid. The element or elements is/are extracted from the acid solution thereof by means of an amine, preferably a tertiary, long-chained alkyl amine, in the presence of hydrogen peroxide and of fluoride ions. Thereby the extraction and separation can be performed effectively at comparatively low acid concentration, normally below a concentration of 4N.