Bisdiglycolamide ligand and preparation method thereof and lanthanum serial/actinium serial separation and extraction system containing bisdiglycolamide ligand

A bisglyceride and ligand technology, which is applied in the field of nuclear fuel cycle and nuclear waste treatment, can solve the problems of unsatisfactory and insufficient separation factor, achieve strong practicability, improve radiation resistance stability, and expand the scope of application Effect

Inactive Publication Date: 2017-06-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with N-containing heterocyclic extractants such as BTPs and BTBPs, NTAamide (C8) extracts Am 3+ /Eu 3+ The separation factor is not high enough [SF of BTPs, BTBPs Am/Eu The value can reach ~100, while the SF of NTAamide (C8) Am/Eu The value is only ~10, and its separ...

Method used

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  • Bisdiglycolamide ligand and preparation method thereof and lanthanum serial/actinium serial separation and extraction system containing bisdiglycolamide ligand
  • Bisdiglycolamide ligand and preparation method thereof and lanthanum serial/actinium serial separation and extraction system containing bisdiglycolamide ligand
  • Bisdiglycolamide ligand and preparation method thereof and lanthanum serial/actinium serial separation and extraction system containing bisdiglycolamide ligand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This example prepares N,N,N"',N"'-tetraethyl-N',N"-ethylenediyl-bisdiglyceramide (TEE-BisDGA) with the structural formula (10). The route looks like this:

[0050]

[0051] The preparation process of the above-mentioned TEE-BisDGA comprises the following steps:

[0052] (1) Diglycolic anhydride (2.9g, 0.025mol) was added to 40mL of tetrahydrofuran, and placed in an ice-water bath at 0°C, and diethylamine (1.8g, 0.025mol) was added dropwise while stirring. After the addition was complete, remove In an ice-water bath, react at 25°C for 3 hours under stirring conditions; then rotary steam the product obtained from the reaction to remove tetrahydrofuran, and then add dropwise an aqueous solution of hydrochloric acid with a volume concentration of 50% to the product obtained from the reaction of removing tetrahydrofuran, and white crystals are precipitated. Suction filtration, and recrystallization and purification using a mixed solvent of methanol / water with a volume ra...

Embodiment 2

[0063] This example prepares N,N,N"',N"'-tetraethyl-N',N"-propanediyl-bisdiglyceramide (TEP-BisDGA) with structural formula (11). The route looks like this:

[0064]

[0065] The preparation process of above-mentioned TEP-BisDGA comprises the following steps:

[0066] (1) Diglycolic anhydride (2.9g, 0.025mol) was added to 40mL 1,4-dioxane, and placed in an ice-water bath at 2°C, diethylamine (2.0g, 0.027mol) was added dropwise while stirring , after the dropwise addition, the ice-water bath was removed, and the reaction was carried out at 25°C for 2.5 hours under stirring conditions; In the obtained product, a hydrochloric acid aqueous solution with a volume concentration of 50% was added dropwise, and white crystals were precipitated. The white crystals were subjected to suction filtration, and recrystallized and purified using a mixed solvent of methanol / water with a volume ratio of 1:1 to obtain N , N-diethyl-3-oxoglutaric acid;

[0067] (2) N, N-diethyl-3-oxoglutaric...

Embodiment 3

[0071] In this example, N,N"'-dimethyl-N,N"'-diethyl-N',N"-butanediyl-bisdiglyceramide (DMDEB-BisDGA) with structural formula (12) was prepared. ), and its synthetic route is as follows:

[0072]

[0073] The preparation process of above-mentioned DMDEB-BisDGA comprises the following steps:

[0074] (1) Diglycolic anhydride (2.9g, 0.025mol) was added to 30mL of dichloromethane, and placed in an ice-water bath at 4°C, and methylethylamine (1.5g, 0.025mol) was added dropwise while stirring. After the dropwise addition, Remove the ice-water bath, and react at 25°C for 2.5 hours under stirring conditions; then rotary steam the product obtained from the reaction to remove dichloromethane, and then add dropwise an aqueous solution of hydrochloric acid with a volume concentration of 50% to the reaction product obtained by removing dichloromethane, and a white Crystals, the white crystals were suction filtered, and recrystallized and purified using a mixed solvent of methanol / wate...

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Abstract

The invention discloses a bisdiglycolamide ligand and a preparation method thereof and a lanthanum serial/actinium serial separation and extraction system containing the bisdiglycine amide ligand. The extraction system is formed by mixing an organic phase and an aqueous phase in equal volume, wherein the organic phase contains 0.1-0.7mol/L N,N,N',N',N',N'-hexa n-octyl-nitrilotriacetamide [NTAamide (C8)] as an extraction agent, and the aqueous phase contains the 0.005-0.02mol/L bisdiglycine amide ligand as a masking agent. The N,N,N',N',N',N'-hexa n-octyl-nitrilotriacetamide [NTAamide] in the extraction system has a unique non-N-heterocyclic triangular structure, so that the irradiation-resistant stability of the extraction system can be greatly improved, secondary pollutants are not generated, and the environmental protection is facilitated; and the extraction system which takes the water soluble bisdiglycolamide ligand as the masking agent has the characteristic of more tending to be complex with lanthanum series, and the lanthanum series can be effectively masked in the aqueous phase, so that selective separation of actinium series and lanthanum series is realized.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel cycle and nuclear waste treatment, relates to an extraction system for the separation of lanthanides / actinides, in particular to a bis-diglyceramide ligand and a preparation method thereof and a lanthanide containing a bis-diglyceramide ligand / Actinide separation extraction system. Background technique [0002] The rational handling and disposal of nuclear fuel is one of the key issues for the sustainable development of nuclear energy. The "separation-transmutation" method is a generally preferred nuclear fuel reprocessing method, the main point of which is to selectively separate the small but highly toxic actinides from the high-level waste liquid by solvent extraction, and then It transmutes to short-lived or stable nuclides. At present, relatively mature processes for the separation of actinides mainly include TRUEX, DIDPA, TRPO, DIAMEX and other processes (Gu Zhongmao et al., Atomic ...

Claims

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Application Information

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IPC IPC(8): C07C235/10B01D11/04G21F9/12
CPCB01D11/0492C07C235/10G21F9/125
Inventor 丁颂东王志鹏胡晓阳张利荣刘莹宋莲君陈志力
Owner SICHUAN UNIV
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