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Calcium carbonate preparation method for accelerating carbonatation reaction

A technology of carbonation and calcium carbonate, applied in calcium carbonate/strontium/barium, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of long reaction time of calcium carbonate, uneven product quality, acceleration, etc., and achieve uniform and stable quality , Accelerate the carbonation reaction rate, the effect of low energy consumption

Active Publication Date: 2018-05-18
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a calcium carbonate preparation method for accelerating carbonation reaction, so as to solve the technical problems that the calcium carbonate prepared in the prior art has a long reaction time and uneven and stable product quality

Method used

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  • Calcium carbonate preparation method for accelerating carbonatation reaction
  • Calcium carbonate preparation method for accelerating carbonatation reaction

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Experimental program
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Embodiment 1

[0020] Improved carbonation reactor:

[0021] Improved coating of carbon dioxide adsorbent materials in a stirred batch bubbling carbonation reactor. A layer of glue with a thickness of 3mm is evenly coated on the inner wall of the reaction kettle, and the silica powder with carbon dioxide adsorption properties is evenly sprayed on the surface of the glue before the glue is dried and solidified, so that the silica is evenly attached to the surface of the glue. The silicon dioxide fixed on the surface can be used after the glue dries. The average specific surface area of ​​silica is 379m 2 / g, the average pore diameter of the silica channel is 5nm.

Embodiment 2

[0023] Improved carbonation reactor:

[0024] Coating improvements for carbon dioxide adsorbent materials in high-gravity carbonation reactors. In parts by weight, mix 1 part of silica gel powder with carbon dioxide adsorption performance with 5 parts of paint, and then coat the inner wall of the high-gravity carbonation reaction kettle, and use it after the coating material is completely dry; the carbon dioxide adsorption The average specific surface area of ​​the material is 263m 2 / g, the average pore diameter of the pores of the carbon dioxide adsorbing material is 8nm.

Embodiment 3

[0026] Improved carbonation reactor:

[0027] Improved coating of carbon dioxide adsorbent materials in a stirred batch bubbling carbonation reactor. Evenly coat a layer of glue with a thickness of 1mm on the inner wall of the reaction kettle. Before the glue is dried and solidified, evenly spray silica and aluminosilicate powder with carbon dioxide adsorption properties on the surface of the glue to make the silica and aluminosilicate powder Evenly attached to the glue surface. The silicon dioxide and aluminosilicate powders fixed on the surface by the glue can be used; the average specific surface area of ​​the carbon dioxide adsorption material is 86m 2 / g, and the average pore diameter of the pores of the carbon dioxide adsorbing material is 19 nm.

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Abstract

The invention discloses a calcium carbonate preparation method for accelerating a carbonatation reaction and belongs to the technical field of calcium carbonate powder preparation. The calcium carbonate preparation method for accelerating the carbonatation reaction comprises the steps that the inner wall of a carbonatation reaction kettle is coated with a carbon dioxide gas adsorption material, and after the coating material fixed on the inner wall of the reaction kettle, by using the reaction kettle which is improved through coating, the carbonatation reaction is conducted to prepare precipitated calcium carbonate. According to the calcium carbonate preparation method, the problems are solved that in the prior art, prepared calcium carbonate is long in reaction time and uneven and unstable in product quality.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate powder preparation, and in particular relates to a calcium carbonate preparation method for accelerating carbonation reaction. Background technique [0002] The carbonation process is very important in the production process of calcium carbonate. Crystallization control technology includes pure process control technology and additive control technology. Calcium carbonate production in Japan is mainly based on process control technology, and European countries such as Germany are mainly based on additive control technology. At present, there are many kinds of carbonation reactors for preparing nano-calcium carbonate in China, including traditional bubbling carbonation reactors, intermittent bubbling stirring carbonation reactors, and newly used spray carbonation reactors, supergravity carbonation reactors Reactor, Venturi jet carbonation reactor, etc. [0003] Simple and outdated carbon...

Claims

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Application Information

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IPC IPC(8): C01F11/18B82Y30/00
CPCB82Y30/00C01F11/181
Inventor 王权广童张法蒙杨平廖丹葵周文英杨征宇钟玲萍黄绍权
Owner GUANGXI UNIV
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