Title:
SELENIUM-TUNGSTEN POLYOXOMETALATE AND PREPARATION METHOD THEREFOR, AND USE THEREOF IN ULTRA-FILTRATION SEPARATION OF ACTINIDE IONS
Document Type and Number:
WIPO Patent Application WO/2024/066260
Kind Code:
A1
Abstract:
Disclosed in the present invention are a selenium-tungsten polyoxometalate and a preparation method therefor, and the use thereof in the ultra-filtration separation of actinide ions. The selenium-tungsten polyoxometalate {Se6W45} is [(CH3)2NH2]15Na0.8(H3O)8.2[Se6W45O159(H2O)9]·27H2O, and belongs to a monoclinic system; the space group is P21/m; and the cell parameters are: a = 15.6207(6), b = 33.5801(11), c = 20.8294(7), α = 90º, β = 98.130(2)º, γ = 90º, and V = 10816.1(7) Å3. By dissolving an Na24[H6Se6W39O144]·74H2O precursor in water and sequentially adding an organic amine and an inorganic acid thereto to treat same, the selenium-tungsten polyoxometalate {Se6W45} is obtained. The selenium-tungsten polyoxometalate {Se6W45} is provided with a hole having a planar donor site, and the site is precisely coordinated with a pentagonal pyramid coordination geometrical shape of a hexavalent actinide ion. The selenium-tungsten polyoxometalate {Se6W45} prepared in the present invention can be selectively coordinated with a hexavalent actinide ion to form a nanocluster, such that efficient complexing and separation of the actinide ions are achieved, the interception coefficient of the actinide ions is up to 96%, the recovery rate of americium recovered by means of ultra-filtration separation reaches 92% or higher, and the problem of hexavalent americium being difficult to stabilize and separate is effectively solved.
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Inventors:
WANG SHUAO (CN)
ZHANG HAILONG (CN)
WANG YAXING (CN)
LI AO (CN)
LI KAI (CN)
ZHANG HAILONG (CN)
WANG YAXING (CN)
LI AO (CN)
LI KAI (CN)
Application Number:
PCT/CN2023/084553
Publication Date:
April 04, 2024
Filing Date:
March 29, 2023
Export Citation:
Assignee:
UNIV SOOCHOW (CN)
International Classes:
C07C211/04; C07C209/00; C22B3/24; C22B58/00; C22B60/00; C30B7/14; C30B29/54
Foreign References:
| CN115626877A | 2023-01-20 | |||
| CN114988500A | 2022-09-02 | |||
| CN103392018A | 2013-11-13 | |||
| US20090026138A1 | 2009-01-29 | |||
| US5609745A | 1997-03-11 |
Attorney, Agent or Firm:
CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE (CN)
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