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Sodium silicate deferrization refining method

A refining method and technology of sodium silicate, applied in silicate, alkali metal silicate and other directions, can solve the problems of restricting the use of sodium silicate, and achieve the effects of low cost, simple process and good iron removal effect.

Inactive Publication Date: 2012-05-09
山西天一纳米科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above sodium silicate refining method is mainly to refine sodium silicate through physical filtration. This method can remove solid impurities in sodium silicate, but there are a large number of metal impurities in ionic state in sodium silicate, especially Iron ions are ubiquitous and cannot be removed by filtration alone
The presence of these metal ions limits the use of sodium silicate on higher-level products

Method used

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  • Sodium silicate deferrization refining method

Examples

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Effect test

Embodiment 1

[0017] The specific gravity is 1.4, the modulus is 3.0, and 1400 kg of sodium sodium silicate with an iron content greater than 30PPM is sent to the reaction kettle, 42 kg of industrial sodium sulfide and 14 kg of copper sulfate are added, stirred and heated to 60 ° C, continuously stirred for 45 minutes, and then the reaction The material is sent into the settling tank and left to stand for 36 hours and then filtered to obtain a pure sodium silicate product with an iron content of 4.8PPM.

Embodiment 2

[0019] 1100 kg of sodium sodium silicate with a specific gravity of 1.1, a modulus of 2.6, and an iron content of 25PPM is placed in a reaction kettle, 44 kg of industrial sodium sulfide and 11 kg of copper sulfate are added, stirred and heated to 65°C, continuously stirred for 30 minutes, and the reactant Import into sinking tank and let stand for 24 hours and then filter to obtain pure sodium silicate product, wherein the iron content is 4.7PPM.

Embodiment 3

[0021] Specific gravity 1.3, modulus 3.4, 1300 kg of sodium sodium silicate with iron content of 15PPM, add 78 kg of industrial sodium sulfide, 13 kg of copper sulfate, stir and heat to 70 ° C, continue stirring for 60 minutes, import into the settling tank and let it stand for 72 hours before filtering. Obtain iron content and be the pure sodium silicate product of 4.9PPM.

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Abstract

The invention discloses a sodium silicate deferrization refining method, through the method of adding chemical sedimentation agent, ferric ion and other metal ions in sodium silicate can be reacted with the sedimentation agent to produce solid particles with larger particle size, and then the particles are removed through filtering. The method disclosed by the invention is simple in process, is good in deferrization effect and is low in cost. With the method disclosed by the invention, pure sodium silicate products with the ferric content less than or equal to 5PPM can be obtained. Other metal ions can be simultaneously removed. Through the detection, the key technical indexes are as follows: Fe is less than or equal to 5PPM, Ca is less than or equal to 3 PPM, Cu is less than or equal to 5 PPM, Mg is less than or equal to 5 PPM, other heavy metals can be basically removed, and the broad selection space for the application of the sodium silicate can be provided.

Description

technical field [0001] The invention relates to a method for removing various metal ions such as iron in sodium silicate, which belongs to the refining process of inorganic silicon chemical raw materials. Background technique [0002] Sodium silicate is one of the very important inorganic chemical raw materials in both traditional and modern industries. In addition to being used as detergent and adhesive components, it is also used in the manufacture of silica gel, molecular sieves, silica sol, white carbon black, etc. As an important raw material for a series of fine chemicals, the quality of sodium silicate itself, that is, the purity, has a great impact on the production and quality of its downstream products, and the raw solution of sodium silicate is mixed with a large amount of impurities in the production process, which is very turbid. Traditionally The stock solution is purified by gravity sedimentation method, but the equipment used in this method is huge, occupies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
Inventor 赵建卿张原僖周日升梁建强
Owner 山西天一纳米科技股份有限公司