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:
Sep. 09, 1986
Filed:
Feb. 28, 1984
Kiyoshi Fujiwara, Kudamatsu, JP;
Shoji Yoshinaga, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Uranium is stably stripped from an organic solvent containing a uranium-laden, amine-based extracting agent into an aqueous ammonium sulfate solution with a very high stripping efficiency in an emulsion-formable high pH range by mixing the organic solvent, the aqueous ammonium sulfate solution and an alkali as a pH-controlling agent, thereby forming a mixture having a pH of 4.5 to 6.0 and a temperature of 15.degree. to 50.degree. C., preferably 25.degree. to 40.degree. C., and subjecting the resulting mixture to an action of centrifugal force of 850 G or higher, thereby separating it into an organic solvent freed from the uranium and an aqueous ammonium sulfate solution containing the uranium.