Preparation method of calcium hydroxide with high dispersity and high specific surface area

A technology with high specific surface area and calcium hydroxide, applied in the field of preparation of calcium hydroxide with high dispersibility and high specific surface area, can solve the problems of easy agglomeration and affect the quality of finished products, achieve low price, avoid agglomeration, improve dispersibility and The effect of stability

Inactive Publication Date: 2020-02-21
衢州顺天钙业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When quicklime reacts with water, it is easy to agglomerate and affect the quality of the finished product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add the quicklime obtained by calcining into the digester, then add natural nanocellulose and sodium carboxymethyl cellulose, the addition of natural nanocellulose is 2% of the dry mass of quicklime, and the addition of sodium carboxymethylcellulose is 2% of quicklime 0.2% of absolute dry mass, shear at a shear rate of 1500 rpm for 1.5 hours; after uniform dispersion, add water, control the mass ratio of calcium oxide and water to 1:6, and ultrasonicate for 30 min at an ultrasonic power of 300W ; After the reaction, the product is washed, centrifuged, dried and ground to obtain the finished product.

Embodiment 2

[0018] Add the quicklime obtained by calcining into the digester, then add natural nanocellulose and sodium carboxymethyl cellulose, the addition of natural nanocellulose is 2.5% of the dry mass of quicklime, and the addition of sodium carboxymethylcellulose is 2.5% of quicklime 0.2% of absolute dry mass, shear at a shear rate of 1500 rpm for 1.5 hours; after uniform dispersion, add water, control the mass ratio of calcium oxide and water to 1:6, and ultrasonicate for 30 min at an ultrasonic power of 300W ; After the reaction, the product is washed, centrifuged, dried and ground to obtain the finished product.

Embodiment 3

[0020] Add the quicklime obtained by calcining into the digester, then add natural nanocellulose and sodium carboxymethyl cellulose, the addition of natural nanocellulose is 3% of the dry mass of quicklime, and the addition of sodium carboxymethylcellulose is 3% of quicklime 0.2% of absolute dry mass, shear at a shear rate of 1500 rpm for 1.5 hours; after uniform dispersion, add water, control the mass ratio of calcium oxide and water to 1:6, and ultrasonicate for 30 min at an ultrasonic power of 300W ; After the reaction, the product is washed, centrifuged, dried and ground to obtain the finished product.

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Abstract

The invention relates to a preparation method of calcium hydroxide with high dispersity and high specific surface area. Quicklime is used as a raw material, natural nanocellulose with rich oxygen-containing groups is added in the digestion reaction process to serve as a template and a surfactant sodium carboxymethyl cellulose is added in the digestion reaction process, high-speed shearing and sufficient mixing are performed, nucleation and growth of calcium hydroxide are achieved based on the ultrasonic action, and calcium hydroxide with high specific surface area is obtained through washing,centrifuging, drying and grinding. According to the method, natural nanocellulose is used as a template to realize controllable synthesis of calcium hydroxide with high specific surface area, the surfactant sodium carboxymethyl cellulose is added in the process to synergistically improve the dispersibility and stability of calcium hydroxide, and the application range of calcium hydroxide is greatly widened on the basis of improving the performance of calcium hydroxide.

Description

technical field [0001] The invention belongs to the technical field of calcium hydroxide preparation, and in particular relates to a preparation method of calcium hydroxide with high dispersion and high specific surface area. Background technique [0002] In recent years, the rapid development of cities and the increase of population have led to an increasing amount of domestic waste. At present, waste incineration is an effective treatment method. Not only can it be implemented in large quantities, reducing land occupation, but the heat generated by waste incineration can also be used for production and life. However, after the garbage is incinerated at high temperature, a large amount of smoke and dust will be produced, especially the sulfur dioxide contained in the smoke, which poses a huge threat to human health and the living environment. Therefore, the implementation of flue gas desulfurization and reduction of sulfur dioxide emissions will help improve air quality, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/06
CPCC04B2/06
Inventor 童斌雷胜丰
Owner 衢州顺天钙业有限公司
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