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. 02, 1979
Filed:
Apr. 14, 1978
Joseph Pugach, Ho-Ho-Kus, NJ (US);
Halcon Research & Development Corporation, New York, NY (US);
Abstract
A process is provided for extracting monovalent thallium and alkali metal values from a liquid medium containing a carboxylic acid having limited solubility in water and containing dissolved trivalent thallium values, monovalent thallium values and, optionally, alkali metal compound, which comprises contacting the carboxylic acid medium with an extractant comprising an acidic aqueous medium having a pH of not greater than about 6 to preferentially extract monovalent thallium and alkali metal values into the aqueous medium, and recovering a raffinate comprising a treated carboxylic acid medium containing trivalent thallium carboxylate and depleted of monovalent thallium and alkali metal values.