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Process for producing superfine barium carbonate and strontium carbonate

A preparation process, barium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of complex process flow, large equipment investment, high production cost, etc., achieve good quality, less equipment investment, and improve product quality.

Inactive Publication Date: 2008-11-12
HENGYANG JINYUAN NANO TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

There are also scientific research units using rotating packed bed in the laboratory to use liquid-liquid reaction to produce ultra-fine barium carbonate and strontium carbonate with barium chloride and strontium chloride plus ammonium bicarbonate, which has complicated process flow, large equipment investment and high production cost. , low output rate, easy to block and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: 150kg of ionized water, temperature 75°C, add 15kg of strontium hydroxide monohydrate and stir thoroughly, pump into the reaction tower, the reaction motor speed is 800 rpm, feed carbon dioxide, react for 12 minutes, add 150kg of dispersant, the reaction is complete Finally, the strontium carbonate precipitate was washed once with deionized water, filtered, and the strontium carbonate was dried at 150°C for 3 hours to obtain 5kg of strontium carbonate, the particle size was below 100nm, the average particle size was about 70nm, and the crystal form was spindle type.

Embodiment 2

[0017] Embodiment 2: motor speed is 1500 rev / mins, by 1: 20 concentration with deionized water 200kg, barium sulfide 10kg, other conditions are with embodiment 1, and the barium carbonate particle diameter that obtains is below 100nm, and average particle diameter is 50nm Left and right, crystal spindle type.

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Abstract

A novel process for preparing ultra-fine barium carbonate and strontium carbonate, wherein barium sulphide solution or barium hydrate solution are used as raw material to be carbonized by carbon dioxide in helical channel type revolving bed, obtaining precipitate, then ultramicro fine barium carbonate is obtained through washing, dewatering and drying, and strontium sulfide solution or strontium hydroxide solution are used as raw material to be carbonized by carbon dioxide in helical channel type revolving bed, obtaining precipitate, then ultramicro fine strontium carbonate is obtained through washing, dewatering and drying.

Description

technical field [0001] The invention belongs to the field of inorganic chemical industry and relates to a preparation process of barium carbonate and strontium carbonate, in particular to a novel preparation process of ultrafine barium carbonate and strontium carbonate. Background technique [0002] Ultrafine barium carbonate and strontium carbonate are important chemical products. Due to my country's rich mineral resources, barium carbonate and strontium carbonate are important export inorganic chemical products. Due to the progress of science and the increasing development of information and biological industries, the market has higher and higher requirements for the quality of raw materials, especially in the electronics, ceramics, glass and other industries where barium carbonate and strontium carbonate are widely used. The particle size and uniformity requirements are getting higher and higher. At present, the industrial production of barium carbonate and strontium car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 谭耀李绍国周继承颜晓红谭云喜夏绍伟廖立民
Owner HENGYANG JINYUAN NANO TECH
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