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:
Apr. 30, 1985
Filed:
May. 25, 1983
Tadao Asami, Yokohama, JP;
Tetsuro Suehiro, Yatabemachi, JP;
Hisao Ichijo, Yatabemachi, JP;
Aizo Yamauchi, Sakuramura, JP;
Shigeo Ogawa, Yatabemachi, JP;
Mitsuo Suzuki, Tokyo, JP;
Mitsutaka Uzumaki, Tokyo, JP;
Agency of Industrial Science & Technology, all of, JP;
Nitivy Co., Ltd., all of, JP;
Seimi Chemical Co., Ltd., all of, JP;
Abstract
Rare earth metals are adsorbed on an ion exchange fiber comprising an ion exchanger having a strong cation exchange group and a weak cation exchange group, and the adsorbed metals are fractionally eluted with an aqueous solution of a chelating agent, whereby the respective rare earth metals can be separated at high efficiency in a short time. According to this method, elution can be accomplished at an elution rate of 5.0 or above in terms of space velocity.