Production process of barium carbonate

A production process, barium carbonate technology, applied in the direction of barium carbonate, calcium carbonate/strontium/barium, etc., can solve the problems of large amount of dispersant, small specific surface area, complex production process, etc.

Pending Publication Date: 2021-04-09
宜昌华昊新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of producing high-purity barium carbonate is to react barium chloride and ammonium bicarbonate. The reaction raw materials are all liquid, the production process is complicated, there are many by-products, th...

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  • Production process of barium carbonate

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Effect test

Embodiment 1

[0027] A kind of production technology of barium carbonate, described method comprises the following steps:

[0028] S1: Add barium hydroxide to high-purity water, place it in a dissolving pump for dissolution, and obtain a barium hydroxide solution;

[0029] S2: Add liquid ammonia to the barium hydroxide solution prepared in step S1, and stir at a constant temperature for 10-60 min at 40° C.;

[0030] S3: Pass carbon dioxide into the barium hydroxide solution that is added with liquefied ammonia described in step S2 through a micro-reaction device under stirring state, stop passing carbon dioxide when pH=6, obtain barium carbonate solution;

[0031] S4: heating the barium carbonate solution prepared in step S3 to make it fully react; then carry out precipitation and filtration to obtain barium carbonate precipitate;

[0032] S5: drying the barium carbonate precipitate in step S4 in a desiccator to obtain high-purity electronic grade barium carbonate.

[0033] Preferably, th...

Embodiment 2

[0044] A kind of production technology of barium carbonate, described method comprises the following steps:

[0045] S1: Add barium hydroxide to high-purity water, place it in a dissolving pump for dissolution, and obtain a barium hydroxide solution;

[0046] S2: Add liquid ammonia to the barium hydroxide solution prepared in step S1, and stir at a constant temperature for 30 minutes at 30° C.;

[0047] S3: Pass carbon dioxide into the barium hydroxide solution that is added with liquefied ammonia described in step S2 through the micro reaction device under stirring state, stop passing carbon dioxide when pH=7, obtain barium carbonate solution;

[0048] S4: heating the barium carbonate solution prepared in step S3 to make it fully react; then carry out precipitation and filtration to obtain barium carbonate precipitate;

[0049] S5: drying the barium carbonate precipitate in step S4 in a desiccator to obtain high-purity electronic grade barium carbonate.

[0050] Preferably,...

Embodiment 3

[0061] A kind of production technology of barium carbonate, described method comprises the following steps:

[0062] S1: Add barium hydroxide to high-purity water, place it in a dissolving pump for dissolution, and obtain a barium hydroxide solution;

[0063] S2: Add liquid ammonia to the barium hydroxide solution prepared in step S1, and stir at a constant temperature of 45° C. for 46 minutes;

[0064] S3: Pass carbon dioxide into the barium hydroxide solution that is added with liquefied ammonia described in step S2 through a micro-reaction device under stirring state, stop passing carbon dioxide when pH=7.5, obtain barium carbonate solution;

[0065] S4: heating the barium carbonate solution prepared in step S3 to make it fully react; then carry out precipitation and filtration to obtain barium carbonate precipitate;

[0066] S5: drying the barium carbonate precipitate in step S4 in a desiccator to obtain high-purity electronic grade barium carbonate.

[0067] Preferably,...

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Abstract

The invention relates to a production process of barium carbonate. The production process comprises the following steps: adding barium hydroxide into high-purity water, and dissolving in a dissolving pump to obtain a barium hydroxide solution; adding liquid ammonia into the barium hydroxide solution, and stirring for 10-60 minutes at a constant temperature of 30-80 DEG C; introducing carbon dioxide into the barium hydroxide solution added with the liquid ammonia through a micro reaction device in a stirring state, and stopping introducing the carbon dioxide when the pH value is equal to 6-9, so as to obtain a barium carbonate solution; heating the prepared barium carbonate solution to enable the barium carbonate solution to fully react; precipitating and filtering to obtain a barium carbonate precipitate; and drying the barium carbonate precipitate in a dryer to obtain high-purity electronic-grade barium carbonate. According to the invention, carbon dioxide and barium hydroxide are used as raw materials for gas-liquid reaction, the production process is simple, no by-product is produced in the reaction, the product purity is high, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to a production process of barium carbonate, in particular to a production method of high-purity electronic grade barium carbonate. Background technique [0002] High-purity barium carbonate is mainly used for solid phase synthesis of electronic sensitive ceramic main crystal phase materials such as titanate, zirconate, stannate, etc. In recent years, with the development of the information and communication industry, the electronic component industry such as laminated capacitors, capacitor-inductor dual-function components, and the barium titanate supercapacitor industry have put forward higher requirements for the specific surface area of ​​high-purity barium carbonate. At the same time, more stringent attention has been paid to the strontium impurity content affecting the sintering temperature. At present, the method for producing high-purity barium carbonate is to react barium chloride and ammonium bicarbonate. The reaction r...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/188C01P2006/12C01P2006/80
Inventor 林福平
Owner 宜昌华昊新材料科技有限公司
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