Title:
CESIUM AND/OR STRONTIUM ADSORBENT
Document Type and Number:
WIPO Patent Application WO/2017/141931
Kind Code:
A1
Abstract:
Provided is an adsorbent that has the ability to adsorb cesium and strontium, and in particular can efficiently adsorb strontium from a medium such as water containing a low concentration of strontium. Also provided is an adsorbent manufacturing method that is suitable for the manufacture of said adsorbent. This cesium and/or strontium adsorbent is a strontium adsorbent that includes a group 5 element M-containing crystalline silicotitanate, in which a crystalline silicotitanate expressed by the general formula A2Ti2O3(SiO4)∙nH2O (where A indicates one or two types of alkali element selected from Na and K, and n indicates a number from 0 to 2) contains a group 5 element M, wherein, when X-ray diffraction measurement is performed with a diffraction angle (2θ) range of 5° to 80° and using Cu-Kα as an X-ray source, the width at half height of a main peak within 2θ=11° to 12° is 0.320° or less, and no peak is observed in the range 2θ=29° to 30°.
Inventors:
KINOSE YUTAKA (JP)
MIYABE SHINSUKE (JP)
NOGUCHI EIJI (JP)
SAKAMOTO TAKESHI (JP)
SUGIHARA KAORI (JP)
MIYABE SHINSUKE (JP)
NOGUCHI EIJI (JP)
SAKAMOTO TAKESHI (JP)
SUGIHARA KAORI (JP)
Application Number:
PCT/JP2017/005404
Publication Date:
August 24, 2017
Filing Date:
February 15, 2017
Export Citation:
Assignee:
NIPPON CHEMICAL IND (JP)
International Classes:
B01J20/10; B01J20/28; B01J20/30; C01B33/20; G21F9/12
Domestic Patent References:
| WO2016010142A1 | 2016-01-21 |
Other References:
CHITRA, S. ET AL.: "Optimization of Nb-substitution and Cs+/Sr+2 ion exchange in crystalline silicotitanates (CST", JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, vol. 295, no. 1, 12 May 2012 (2012-05-12), pages 607 - 613, XP035152898
CHEN, TZU-YU: "Immobilisation of caesium from crystalline silicotitanate by hot isostatic pressing", PH.D. THESIS, 2012, XP055410560, Retrieved from the Internet [retrieved on 20170428]
CHEN, TZU-YU: "Immobilisation of caesium from crystalline silicotitanate by hot isostatic pressing", PH.D. THESIS, 2012, XP055410560, Retrieved from the Internet
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