Production method of anhydrous sodium metasilicate

A technology of anhydrous sodium metasilicate and its production method, which is applied in the direction of silicate and alkali metal silicate, can solve the problem of not meeting the content requirements of anhydrous sodium metasilicate, small transportation volume, increased transportation cost, and affecting kiln production. Furnace service life and other issues, to achieve the effect of low maintenance and cost, long drying time and high specificity

Active Publication Date: 2015-12-30
山东龙港硅业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) The kiln firing method requires a large investment in equipment and occupies a large area, and the refractory material of the kiln body can also react with alkali, which affects the service life of the kiln and the purity of the product; due to the need for 1200-1400 ° C temperature, so this method has problems such as high equipment maintenance costs, high production energy consumption, and low product purity.
[0009] (2) Spray drying method, because the liquid is atomized in the dryer by the atomizer, and the contact time with the dry hot air can only reach a dozen or tens of seconds, so it is difficult to achieve complete dehydration, and its water content is > 10 %, cannot meet the content requirements of anhydrous sodium metasilicate, and because the dried product after atomization is powder, its particles are fine and the bulk density is small, the customer has a lot of dust when feeding, and the transportation volume is small, which increases the transportation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of production method of anhydrous sodium metasilicate, described production method comprises the following steps:

[0035] (1) Get 25kg of quartz sand (silicon dioxide content is 99.3%), caustic soda (sodium oxide content is 45%) 45kg, react 4 hours under the condition of pressure 1.6MPa, temperature 200 ℃, get liquid sodium silicate thick liquid ;

[0036] (2) At 80°C, add a flocculant to the crude liquid sodium silicate liquid. The flocculant is preferably a polyacrylamide flocculant. The amount of the flocculant added is 0.2‰ of the weight of the liquid sodium silicate crude liquid. Stir for 30 Minutes, stand still for 15 hours to get flocculant, add filter aid to flocculant, the weight of filter aid is 0.2% of the weight of flocculant, filter aid is the mixture of diatomite and activated carbon, diatomite and activated carbon The weight ratio of is 2:1, filters through filtering device, obtains sodium silicate refining solution and filter residue;

[0037] ...

Embodiment 2

[0041] A kind of production method of anhydrous sodium metasilicate, described production method comprises the following steps:

[0042] (1) Get quartz sand (silicon dioxide content is 99.5%) 28kg, caustic soda (sodium oxide content is 48%) 42kg, react 8 hours under the condition of pressure 1.0MPa, temperature 180 ℃, get liquid sodium silicate thick liquid ;

[0043] (2) At 90°C, add a flocculant to the crude liquid sodium silicate liquid. The flocculant is preferably a polyacrylamide flocculant. The amount of the flocculant added is 0.3‰ of the weight of the liquid sodium silicate crude liquid. Minutes, stand still for 13 hours to get flocculant, add filter aid to flocculant, the weight of filter aid is 1% of the weight of flocculant, filter aid is the mixture of diatomite and activated carbon, diatomite and activated carbon The weight ratio of is 2:1, filters through filtering device, obtains sodium silicate refining solution and filter residue;

[0044] (3) Mix sodium si...

Embodiment 3

[0048] A kind of production method of anhydrous sodium metasilicate, described production method comprises the following steps:

[0049] (1) Get 30kg of quartz sand (silicon dioxide content is 100%), caustic soda (sodium oxide content is 50%) 48kg, react 12 hours under the condition of pressure 0.6MPa, temperature 150 ℃, get liquid sodium silicate thick liquid ;

[0050] (2) At 95°C, add a flocculant to the liquid sodium silicate crude liquid, the flocculant is preferably a polyacrylamide flocculant, the amount of the flocculant added is 0.5‰ of the weight of the liquid sodium silicate crude liquid, stir for 60 Minutes, stand for 10 hours to get flocculant, add filter aid to the flocculant, the weight of the filter aid is 2% of the weight of the flocculant, the filter aid is a mixture of diatomite and activated carbon, diatomite and activated carbon The weight ratio of is 2:1, filters through filtering device, obtains sodium silicate refining solution and filter residue;

[...

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Abstract

The invention belongs to the technical field of sodium metasilicate production, and particularly relates to a production method of anhydrous sodium metasilicate. The production method comprises the following steps of (1) preparing crude sodium silicate liquid; (2) refining and filtering the crude sodium silicate liquid; (3) preparing sodium metasilicate liquid; (4) drying and granulating the sodium metasilicate liquid; (5) screening. According to the production method provided by the invention, a product prepared by using the production method has high purity and content, product particles are uniform, the specific gravity is large, the production equipment investment is small, an occupied area is small, the amount of maintenance and cost are low, and the effects of energy conservation and environmental friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of sodium metasilicate production, in particular to a production method of anhydrous sodium metasilicate. Background technique [0002] The relative bulk density of anhydrous sodium metasilicate is 1.05-1.35g / ml, the melting point is 1089°C, and the relative molecular weight is 212. It is a non-toxic, tasteless and pollution-free product; it is easily soluble in water, insoluble in alcohol and acid, and aqueous solution Alkaline, easy to absorb moisture and deliquescence when placed in the air; strong decontamination ability, large PH buffering capacity; excellent detergency, emulsification, dispersion, wetting, penetration and other properties. [0003] Anhydrous sodium metasilicate products are used as washing aids, especially suitable for the production of super-concentrated detergents, industrial cleaning agents, and metal surface treatment agents; as the main raw materials of additives, they are used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
Inventor 王敬伟赵贝贝
Owner 山东龙港硅业科技有限公司
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