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A kind of preparation method of cerium tungstate and prepared cerium tungstate

A technology of cerium tungstate and raw materials, which is applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problems of high reaction temperature and long reaction time, and achieve the effects of simple operation steps, short reaction time and energy saving

Active Publication Date: 2021-07-16
沈阳中基新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there are problems such as long reaction time and high reaction temperature in the existing preparation method of cerium tungstate

Method used

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  • A kind of preparation method of cerium tungstate and prepared cerium tungstate

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preparation example Construction

[0028] The invention provides a kind of preparation method of cerium tungstate, comprises the following steps:

[0029] S1: weighing and mixing the cerium-containing raw material and the tungsten-containing raw material according to the molar ratio of the cerium element contained in the cerium-containing raw material and the tungsten element contained in the tungsten-containing raw material is 3:2, to obtain the mixed raw material A;

[0030] S2: According to the molar ratio of cerium and hydroxide is 1:5 to 5:1, add a basic compound to the mixed raw material A to obtain the mixed raw material B;

[0031] S3: at room temperature to 60° C., perform high-energy ball milling on the mixed raw material B for 1 to 8 hours, wash and filter with water, and obtain cerium tungstate.

[0032] Among them, high-energy ball milling is to provide enough energy for the reaction, and water washing is to remove soluble impurities.

Embodiment 1

[0035] Cerium chloride solid and ammonium tungstate solid are weighed and mixed according to the molar ratio of cerium element in cerium chloride and tungsten element in ammonium tungstate as 3:2; add ammonia water with a mass fraction of 28%, and the amount of ammonia water added is based on hydrogen The molar amount of oxygen radicals is: the molar ratio of cerium to hydroxide radicals is 1:5. At room temperature, after high-energy ball milling for 1 hour, wash and filter with water to obtain cerium tungstate.

[0036] like figure 1 As shown, it is the XRD pattern of cerium tungstate obtained in Example 1. The peaks and peak positions of the pattern are in one-to-one correspondence with the structure of cerium tungstate, indicating that the product is cerium tungstate; and the peak shape of each peak is sharp, indicating that the product is crystallized whole.

Embodiment 2

[0038] Cerium nitrate solid and ammonium metatungstate solid are weighed and mixed according to the molar ratio of cerium element in cerium nitrate and tungsten element in ammonium metatungstate 3:2, and then sodium hydroxide is added. The molar weight is: the molar ratio of cerium to hydroxide is 5:1. After high-energy ball milling at 60°C for 5 hours, wash and filter with water to obtain cerium tungstate.

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Abstract

The invention belongs to the technical field of rare earth metallurgy, and mainly relates to a preparation method of cerium tungstate, comprising the following steps: S1: combining the cerium-containing raw material and the tungsten-containing raw material according to the cerium element contained in the cerium-containing raw material and the tungsten contained in the tungsten-containing raw material. The molar ratio of the elements is mixed at 3:2 to obtain the mixed raw material A; S2: According to the molar ratio of cerium and hydroxide radicals of 1:5 to 5:1, add a basic compound to the mixed raw material A to obtain the mixed raw material B; S3: At room temperature to 60°C, the mixed raw material B is subjected to high-energy ball milling for 1 to 8 hours, washed with water and filtered to obtain cerium tungstate. The present invention also provides a sodium tungstate prepared by the above method. The invention can obtain cerium tungstate without sintering at a lower temperature, has simple operation steps, shorter reaction time, and saves energy.

Description

technical field [0001] The invention belongs to the technical field of rare earth metallurgy, and mainly relates to a preparation method of cerium tungstate and the prepared cerium tungstate. Background technique [0002] Tungstate is a very important class of inorganic functional materials. Tungstate has good chemical stability, excellent optical, electrical and magnetic properties, and has the characteristics of wear resistance, corrosion resistance and non-toxicity. It is widely used in optical materials, magnetic materials, ceramic materials, antibacterial materials, preservatives, catalysts and dyes, etc. The application of cerium tungstate mainly focuses on photocatalytic materials, luminescent materials and coating filling modification materials, etc., which has broad development prospects and predictable market potential. [0003] At present, there are about six methods for the preparation of cerium tungstate, which are high-temperature solid-phase method, 180°C hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00
CPCC01G41/00C01P2002/72
Inventor 边雪姜文雪吴文远
Owner 沈阳中基新材料有限公司