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Tricarboxylic acid rare earth complex as well as preparation method and application thereof

A technology of rare earth complexes and tricarboxylic acids, which is applied in the preparation of carboxylate, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of shielding effect, mechanical properties, heat resistance and radiation resistance. , to achieve the effect of good protection, excellent absorption capacity and light weight

Inactive Publication Date: 2012-06-27
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of nuclear energy and nuclear reactors, the requirements for nuclear shielding materials and shielding systems are getting higher and higher. Many existing shielding materials are difficult to meet the requirements, mainly in the shielding effect of shielding materials and other properties such as mechanical properties and heat resistance. It is difficult to balance the performance and radiation resistance

Method used

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  • Tricarboxylic acid rare earth complex as well as preparation method and application thereof
  • Tricarboxylic acid rare earth complex as well as preparation method and application thereof
  • Tricarboxylic acid rare earth complex as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] According to La 2 o 3 Dosing with tricarboxylic acid molar ratio of 1:2, weighing La 2 o 3 and C 22 h 34 o 6 , La 2 o 3 Prepare LaCl by dissolving with 6mol / L hydrochloric acid 3 solution. Tribasic carboxylic acid was dissolved in 30% NaOH solution to prepare tribasic carboxylic acid sodium salt.

[0027] LaCl 3 The solution was transferred to a reaction kettle, and the LaCl 3 The solution is added dropwise into the tribasic carboxylic acid sodium salt solution to react for 3-5 hours to obtain a white precipitate of the tribasic carboxylic acid rare earth, which is separated by filtration to obtain the tribasic carboxylic acid rare earth complex.

Embodiment 2

[0029] Press Sm 2 o 3 Dosing with tricarboxylic acid molar ratio of 1:1.5, weighing Sm 2 o 3 and C 22 h 34 o 6 , Sm 2 o 3 Dissolving with 6mol / L nitric acid to prepare Sm(NO 3 ) 3 , Tribasic carboxylic acid was dissolved in 3M ammonia water to prepare tribasic carboxylic acid ammonium salt.

[0030] Sm(NO 3 ) 3 The solid is dissolved in a pH=4-7 buffer solution (acetic acid-sodium acetate), and under the condition of 70-90°C water bath and mechanical stirring, add the tribasic carboxylate ammonium salt solution dropwise into the buffer system and react for 3-5 hours , the white precipitate of tribasic carboxylic acid rare earth can be obtained, and the tribasic carboxylic acid rare earth complex can be obtained by filtration and separation.

Embodiment 3

[0032] Press Gd 2 o 3 Dosing with tricarboxylic acid molar ratio of 1:2, weighing Gd 2 o 3 and C 22 h 34 o 6 , Gd 2 o 3 Prepare GdCl by dissolving with 6mol / L hydrochloric acid 3 solution, and then the GdCl 3 The solution converts to Gd(OH) 3 Solid, spare.

[0033] Gd(OH) 3 The solid was placed in a reaction kettle and reacted with tricarboxylic acid under stirring at 120°C, and the white solid obtained after 24 hours of reaction was tricarboxylic acid rare earth complex.

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Abstract

The invention discloses a tricarboxylic acid rare earth complex the composition of which is RE(C22H31O6). In the composition RE(C22H31O6), C22H31O6 is a tervalent ion obtained by removing proton in C22H34O6; and the structural formula of the complex is as shown in a formula (I), wherein RE is a rare earth ion, most preferably, RE is La ion, Sm ion or Gd ion. The tricarboxylic acid rare earth complex is prepared by carrying out a reaction on rare earth hydroxide and tricarboxylic acid C22H34O6, or carrying out a reaction on soluble rare earth salt and tricarboxylic acid C22H34O6 or salt thereof. According to the invention, the absorption capabilities of the rare earth complex disclosed by the invention on low-energy and middle-energy rays are superior to those of lead; the rare earth complex is light in weight, and a shielding material made from the rare earth complex has the characteristic of light weight compared with the traditional lead shielding material; the rare earth complex is the rare earth complex of tricarboxylic acid, a ligand contains multiple carboxyl groups, does not contain unsaturated bonds, and has better protective effect compared with rare earth oxide.

Description

technical field [0001] The present invention relates to a trivalent carboxylic acid rare earth complex and its preparation method and radiation protection application. The complex can be used to prepare rare earth / polymer composite materials. The invention provides shielding and radiation protection functions of sources, and belongs to the chemical technical field of rare earth complexes. Background technique [0002] With the development of nuclear energy and nuclear reactors, the requirements for nuclear shielding materials and shielding systems are getting higher and higher. Many existing shielding materials are difficult to meet the requirements, mainly in the shielding effect of shielding materials and other properties such as mechanical properties and heat resistance. It is difficult to balance the performance and radiation resistance. Since rare earth elements have anti-radiation properties, the main function of nuclear radiation shielding materials is to absorb or w...

Claims

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Application Information

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IPC IPC(8): C07C61/35C07C51/00C08L7/00C08K5/092G21F1/10
Inventor 赵景婵蓝春波张百鑫代燮陈陶静沙碧静鲜苗唐薇莉
Owner NORTHWEST UNIV
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