Preparation method of anhydrous lanthanum chloride

A technology of lanthanum chloride trihydrate and lanthanum chloride, applied in chemical instruments and methods, inorganic chemistry, rare earth metal chlorides, etc., to achieve the effects of low preparation cost, simple operation, and good dehydration effect

Inactive Publication Date: 2017-12-22
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the above-mentioned prior art, the present invention provides a preparation method of anhydrous lanthanum chloride, which has the advantages of simple and easy process, high dehydration efficiency, low preparation temperature, and alleviates the problem of equipment corrosion, while the environment Little pollution, and the prepared anhydrous lanthanum chloride has high purity

Method used

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preparation example Construction

[0023] The invention provides a preparation method of anhydrous lanthanum chloride. The preparation method uses lanthanum chloride heptahydrate as a raw material, and specifically carries out segmental fluidized dehydration under a hydrogen chloride protective atmosphere, so as to obtain high-purity, dehydrated lanthanum chloride simply and efficiently. Anhydrous lanthanum chloride works well.

[0024] It is worth noting that the preparation method of anhydrous lanthanum chloride according to the present invention is based on a fluidized dehydration device with three chambers.

[0025] It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0026] Specific reference figure 1 , the fluidized dehydration device includes a first fluidized chamber 11, a second fluidized chamber 12 and a third flu...

Embodiment 1

[0051] In Example 1, the feed rate was controlled to be 100kg / h, and the temperatures of the first-stage fluidized dehydration, the second-stage fluidized dehydration, and the third-stage fluidized dehydration were respectively 70°C, 100°C, and 140°C. At the same time, the first-stage fluidized dehydration , two-stage fluidized dehydration and three-stage fluidized dehydration are all 20 minutes, and finally anhydrous lanthanum chloride product is obtained.

[0052] The anhydrous lanthanum chloride product obtained in the present embodiment was analyzed, wherein the water-insoluble content was 7.0% (wt%); the moisture content was 7.0% (wt%) detected by the Karl Fischer moisture analyzer; XRD analysis shows that the main component of the product is anhydrous lanthanum chloride.

Embodiment 2

[0054] In Example 2, the feed rate was controlled to be 100kg / h, and the temperatures of the first-stage fluidized dehydration, the second-stage fluidized dehydration, and the third-stage fluidized dehydration were 80°C, 130°C, and 140°C, respectively. At the same time, the first-stage fluidized dehydration , two-stage fluidized dehydration and three-stage fluidized dehydration are all 20 minutes, and finally anhydrous lanthanum chloride product is obtained.

[0055] The anhydrous lanthanum chloride product obtained in the present embodiment was analyzed, wherein the water-insoluble content was 4.0% (wt%); the moisture content was 4.0% (wt%) detected by the Karl Fischer moisture analyzer; XRD analysis shows that the main component of the product is anhydrous lanthanum chloride.

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Abstract

The invention discloses a preparation method of anhydrous lanthanum chloride. The preparation method comprises the following steps: S1, carrying out first-section fluidization dehydration on lanthanum chloride heptahydrate at 60 DEG C to 100 DEG C to obtain a lanthanum chloride trihydrate crude product; S2, carrying out second-section fluidization dehydration on the lanthanum chloride trihydrate crude product at 120 DEG C to 130 DEG C to obtain a lanthanum chloride monohydrate crude product; S3, carrying out third-section fluidization dehydration on the lanthanum chloride monohydrate crude product at 140 DEG C to 160 DEG C to obtain the anhydrous lanthanum chloride, wherein the three sections of fluidization dehydration are carried out in a hydrogen chloride gas atmosphere. According to the preparation method of the anhydrous lanthanum chloride, disclosed by the invention, the lanthanum chloride heptahydrate is subjected to sectioned fluidization dehydration and a hydrogen chloride protection gas atmosphere is provided, so that a hydrolysis effect in a process of dehydrating an intermediate product lanthanum chloride monohydrate into the anhydrous lanthanum chloride is effectively inhibited and the purity of a product is greatly improved; the preparation method of the anhydrous lanthanum chloride has the advantages of low dehydration temperature, low preparation cost and good dehydration effect.

Description

technical field [0001] The invention belongs to the technical field of rare earth material preparation, and specifically relates to a method for preparing anhydrous lanthanum chloride by using lanthanum chloride heptahydrate as a raw material. Background technique [0002] Rare earth elements are elements with a strategic position in the 21st century. With their unique physical and chemical properties such as light, electricity, and magnetism, they are widely used in various fields of the national economy and defense industry. Therefore, rare earth elements are called "new materials of the 21st century". treasury". In recent years, rare earth elements have attracted more and more attention due to their important biological activities and pharmacological effects. [0003] The method for preparing anhydrous rare earth chloride has following 4 kinds at present: (1) tetrahydrofuran complex method, namely Deacon in 1979, the method for preparing anhydrous rare earth chloride by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/271
Inventor 韩继龙都永生孙庆国韩凤清李斌凯
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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