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Production method of sodium metasilicate pentahydrate

A technology of sodium metasilicate pentahydrate and its production method, which is applied in the direction of silicate and alkali metal silicate, can solve problems such as coal combustion, environmental pollution, and increased production costs, so as to save production costs and avoid environmental pollution. Pollution, the effect of simplifying the production process

Inactive Publication Date: 2006-11-01
刘增刚
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  • Summary
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AI Technical Summary

Problems solved by technology

This treatment process not only directly increases the production cost, but also burns with coal, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use a centrifugal pump to transfer 72kg of liquid caustic soda (sodium oxide content 45%) into the metering and stirring tank. After starting to stir, add 28kg of weighed quartz powder (above 200 mesh, silicon dioxide content 98%). The pump is input into the drum or reactor, and the drum or reactor is stirred by steam, the temperature is 170°C, and the pressure is controlled at 8 atmospheres. After 4 hours, open the discharge valve, and the material in the drum or reactor flows into the crystallization tank. , when the temperature is cooled to 62°C, add 10% seed crystals (sodium metasilicate pentahydrate) to cool and crystallize naturally, crush it into more than 100 meshes and weigh and pack it.

Embodiment 2

[0016] The production process is the same as in Example 1, wherein 70.8kg of liquid caustic soda (44% sodium oxide content) and 29.2kg of quartz powder (96% silicon dioxide content). The reaction temperature is 180°C, the pressure is 9 atmospheres, and the reaction time is 6 hours.

Embodiment 3

[0018] The production process is the same as in Example 1, wherein 70.8kg of liquid caustic soda (sodium oxide content 46.6%), and quartz powder 29.2kg (silicon dioxide content 96%).

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Abstract

The production method of sodium metasilicate pentahydrate is to use quartz powder with a silicon dioxide content of more than 90% and liquid caustic soda with a sodium oxide content of 38-80% as reaction raw materials, and cool and crystallize it after the reaction is completed. The invention adopts quartz powder and liquid caustic soda with high silica content as reaction raw materials, reacts under heating and pressure, and then directly cools and crystallizes without steaming off water, and realizes the production process of obtaining sodium metasilicate pentahydrate in one step , when using a high content of sodium oxide liquid caustic soda, the product can also be obtained by directly replenishing water in the reaction raw materials. The invention not only greatly saves the production cost, but also avoids environmental pollution, and has good economic and social benefits.

Description

technical field [0001] The invention relates to a production method of sodium metasilicate pentahydrate. Background technique [0002] The usual production process of sodium metasilicate pentahydrate in the market is the reaction production process of water glass and sodium hydroxide. In the production process, it must go through the process of evaporating water. This treatment process not only directly increases the production cost, but also burns with coal, causing environmental pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production method for producing sodium metasilicate pentahydrate without evaporating water, so as to reduce production cost. [0004] The production method of sodium metasilicate pentahydrate of the present invention is characterized in that be that the quartz powder that silicon dioxide content is more than 90% and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/32
Inventor 刘增刚
Owner 刘增刚
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