Title:
ADSORBENT FOR RARE EARTH ELEMENT AND METHOD FOR RECOVERING RARE EARTH ELEMENT
Document Type and Number:
WIPO Patent Application WO/2014/157225
Kind Code:
A1
Abstract:
[Problem] To provide: an adsorbent for a rare earth element, which is capable of easily adsorbing and recovering a rare earth element contained in an aqueous solution at low cost, and which is also capable of selectively adsorbing and recovering a rare earth element that is coexistent with a base metal in an aqueous solution; and a method for recovering a rare earth element.
[Solution] In order to solve the above-mentioned problem, this adsorbent for a rare earth element, which is disposed in an aqueous phase and is brought into contact with an aqueous solution containing a rare earth element in order to adsorb and recover the rare earth element, has a configuration that is characterized by being composed of a base and a diglycol amic acid that is introduced into the base. This method for recovering a rare earth element is characterized by: bringing an aqueous solution containing a rare earth element into contact with the above-described adsorbent for a rare earth element so that the rare earth element is adsorbed on the adsorbent for a rare earth element; and having the rare earth element adsorbed on the adsorbent for a rare earth element desorbed by means of an acid of 1 normal or less.
Inventors:
OGATA TAKESHI (JP)
TANAKA MIKIYA (JP)
TANAKA MIKIYA (JP)
Application Number:
PCT/JP2014/058323
Publication Date:
October 02, 2014
Filing Date:
March 25, 2014
Export Citation:
Assignee:
NAT INST OF ADVANCED IND SCIEN (JP)
International Classes:
B01J20/22; B01J20/30; B01J20/34; C02F1/28; C22B3/24; C22B59/00; C07C235/06; C22B7/00
Foreign References:
| JP2007327085A | 2007-12-20 | |||
| JP2011001584A | 2011-01-06 |
Other References:
ANYUN ZHANG ET AL.: "Preparation of a Novel Macroporous Silica-based Diglycolamide Derivative-impregnated Polymeric Composite and its Adsorption Mechanism for Rare Earth Metal Ions", ADSORPTION SCIENCE & TECHNOLOGY, vol. 25, no. 5, pages 257 - 272
HIROCHIKA NAGANAWA ET AL.: "A New ''Green'' Extractant of the Diglycol Amic Acid Type for Lanthanides", SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT, vol. 14, 2007, pages 151 - 159
HIROCHIKA NAGANAWA ET AL.: "A New ''Green'' Extractant of the Diglycol Amic Acid Type for Lanthanides", SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT, vol. 14, 2007, pages 151 - 159
Attorney, Agent or Firm:
NAKAGAWA KUNIO (JP)
Kunio Nakagawa (JP)
Kunio Nakagawa (JP)
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