A kind of method adopting water glass and lime emulsion to prepare microporous calcium silicate

A technology of microporous calcium silicate and water glass solution, applied in the direction of silicate, alkaline earth metal silicate, etc., can solve the problems of difficulty in providing products with stable quality, poor product quality stability, complex production process, etc., and achieves remarkable results. Economic and environmental benefits, easy industrialization and promotion, and the effect of simple operation of the production process

Active Publication Date: 2017-08-25
临沂三禾生物质科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of the raw material source of this method, the production process is complicated, the investment is large, and the cost is high. At the same time, the production process is affected by the fluctuation of the alumina extraction process conditions in the previous stage, and the product quality stability is poor. So far, it is difficult to provide products with stable quality to meet market demand.

Method used

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  • A kind of method adopting water glass and lime emulsion to prepare microporous calcium silicate
  • A kind of method adopting water glass and lime emulsion to prepare microporous calcium silicate
  • A kind of method adopting water glass and lime emulsion to prepare microporous calcium silicate

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Experimental program
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Effect test

Embodiment 1

[0028] First, in the reaction tank, an appropriate amount of milk of lime with a concentration of 85g / L (calculated as CaO) is added, and after the stirring is started, the sodium silicate solution is quickly added, and the concentration of the sodium silicate solution is 25g / L (SiO 2 meter), the modulus is 0.5, and the reaction is carried out by mixing evenly. The reaction conditions are: milk of lime (calculated as CaO) and sodium silicate (SiO 2 The molar ratio of meter) is 0.6:1, the reaction temperature is normal temperature, the reaction time is 20min, and the stirring linear velocity can be 0.9m / s. After the reaction is completed, the obtained product slurry is dehydrated, washed with hot water at 90°C, and dried at 95°C to obtain microporous calcium silicate powder.

[0029] The microporous calcium silicate powder that present embodiment obtains carries out index test, and the results are shown in Table 1 and figure 1 .

[0030] Table 1. The indicators of the micropo...

Embodiment 2

[0033] The microporous calcium silicate powder was prepared by the method in Example 1, except that the modulus of the sodium silicate solution used was 0.8. The microporous calcium silicate powder obtained in this example was tested for indicators, and the results are shown in Table 2. and figure 2 .

[0034] Table 2. The indicators of the porous calcium silicate powder obtained in Example 2

[0035]

Embodiment 3

[0037]Microporous calcium silicate powder was prepared by the method in Example 1, except that the molar ratio of milk of lime and sodium silicate was 0.8:1, and the microporous calcium silicate powder obtained in this example was tested for indicators , the results are shown in Table 3 and image 3 .

[0038] Table 3. The indicators of the microporous calcium silicate powder obtained in Example 3

[0039]

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Abstract

The invention relates to a method for preparing synthetic micro-hole calcium silicate by adopting water glass and a lime emulsion. The method comprises the following steps: adjusting the water glass raw material to the modulus and concentration required for reaction to obtain a water glass solution meeting the reaction requirements; adding the water glass solution and the purified lime emulsion to a reaction container; reacting under a specific condition to obtain synthetic micro-hole calcium silicate slurry; and purifying, dewatering, washing and baking the calcium silicate slurry to obtain synthetic micro-hole calcium silicate powder. The mother liquor dewatered by the micro-hole calcium silicate slurry disclosed by the invention is used for adjusting the concentration and the modulus of the water glass raw material; and washing water is used for digesting quick lime, thus achieving closed cycle of water. The micro-hole calcium silicate obtained by the method has the characteristics of high whiteness, large specific surface area, high porosity, low density and high oil absorption value, is a functional fine chemical material with high adsorptivity and ion exchange ability, can be applied to papermaking, plastic fillers, paints, pigments and the like, and has wide application fields.

Description

technical field [0001] The invention relates to a method for preparing synthetic microporous calcium silicate by using water glass and lime emulsion, belonging to the field of inorganic salt synthesis and processing applications. Background technique [0002] With the continuous development and improvement of industrial technology and equipment level, the processing industry not only has an increasing demand for inorganic silicate powder products, but also has higher and higher requirements for its functional characteristics and environmental protection, especially for papermaking and plastics. The urgent need for the development of industries such as coatings and coatings has given birth to the emergence of various new environmentally friendly inorganic powder material production technologies and processing technologies. [0003] Calcium silicate is an inorganic powder material commonly used in the processing industry. According to different sources of raw materials and pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/24
Inventor 宋宝祥赵向男郭建文
Owner 临沂三禾生物质科技有限公司
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