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Environment-friendly potassium silicate solution preparation method

A potassium silicate solution, an environment-friendly technology, applied in silicate, alkali metal silicate and other directions, can solve problems such as high production cost, environmental pollution, poor catalyst strength, etc., achieve low manufacturing cost, solve environmental pollution, The effect of low manufacturing cost

Inactive Publication Date: 2021-04-09
HANGZHOU WEISHINUOWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method for preparing potassium silicate by this hot melt method has the following defects: the impurity content of potassium silicate is high, especially the metal ion content exceeds the standard, which seriously affects the application of potassium silicate; the modulus of potassium silicate produced is on the low side , generally no more than 3.4; high temperature melting, high energy consumption, high production cost; carbon dioxide gas will be released during the production process, causing pollution to the environment
In the high modulus potassium silicate prepared by the above-mentioned method, the network structure formed by SiO2 is relatively loose, and it is added in the catalyst as a silicon source, so that the strength of the catalyst is relatively poor, and when the catalyst is prepared, the small holes below 5nm in the catalyst are difficult to obtain. removal, easily lead to high selectivity of methane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: an environment-friendly preparation method of potassium silicate solution is characterized in that the following steps are adopted: take silicon powder and pure water according to a molar ratio of 1:30, mix to obtain 7.25 tons of mixed solution, and heat and stir Aqueous potassium hydroxide solution with a mass concentration of 48% is added dropwise, the dropping rate is 15 kg / min, the amount added is 4950 kg, the heating temperature is 80-100°C, and the reaction is completed to obtain a potassium silicate solution with a modulus of 1.0. The technical indicators of the obtained potassium silicate solution are as follows: SiO2%≥12.5-14.0, K2O%≥19.5-20.5, modulus 1.0±0.1, density (g / cm3) 1.35-1.39, sulfur%≤0.03, Water-insoluble %≤0.02, and said percentages are all mass percentages.

Embodiment 2

[0011] Embodiment 2: a kind of environment-friendly preparation method of potassium silicate solution, it is characterized in that adopting the following steps: Take silicon powder and pure water according to molar ratio 1:13, after mixing, obtain mixed solution 8 tons, under heating and stirring state Add dropwise potassium hydroxide aqueous solution with a mass concentration of 48%, the dropping rate is 15 kg / min, the dropping amount is 3975 kg, the heating temperature is 80-100°C, and the reaction is completed to obtain a potassium silicate solution with a modulus of 2.4. The technical indicators of the obtained potassium silicate solution are as follows: SiO2% ≥ 25.5-26.5, K2O% ≥ 15.5-16.5, modulus 2.4 ± 0.1, density (g / cm3) 1.44-1.49, sulfur % ≤ 0.03, Water-insoluble %≤0.02, and the stated percentages are all mass percentages.

Embodiment 3

[0012] Embodiment 3: a kind of environment-friendly preparation method of potassium silicate solution, it is characterized in that adopting following steps: Take silicon powder and pure water according to molar ratio 1:14.5, after mixing, obtain mixed solution 7.5 tons, under heating and stirring state Add dropwise an aqueous potassium hydroxide solution with a mass concentration of 48%, with a dropping rate of 10 kg / min, a dropping amount of 2700 kg, a heating temperature of 80-100°C, and a potassium silicate solution with a modulus of 3.2 after the reaction is completed. The technical indicators of the obtained potassium silicate solution are as follows: SiO2% ≥ 24.5-26.5, K2O% ≥ 10.5-12, modulus 3.2 ± 0.1, density (g / cm3) 1.35-1.4, sulfur % ≤ 0.03, Water-insoluble %≤0.02, and said percentages are all mass percentages.

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Abstract

The invention relates to an environment-friendly potassium silicate solution preparation method, which is characterized by comprising the following steps: weighing silicon powder and purified water according to a molar ratio of 1: 13-31.5, mixing to obtain a mixed solution, dropwise adding a potassium hydroxide aqueous solution with a mass concentration of 48% in a heating and stirring state at a dropwise adding speed of 5-15 kg / min, wherein the dropwise adding amount is 141.667-682.759 kg per ton of the mixed solution, the heating temperature is 80-100 DEG C, and the potassium silicate solution with the modulus of 1-4.8 is obtained after the reaction is completed. The method has the advantages that the method is environmentally friendly and low in manufacturing cost, the obtained potassium silicate solution is high in purity and controllable in modulus, and the modulus of the prepared potassium silicate solution can be between 1-4.8.

Description

【Technical field】 [0001] The invention relates to the technical field of potassium silicate preparation, in particular to a method for preparing an environmentally friendly potassium silicate solution. 【Background technique】 [0002] Potassium silicate, also known as potassium water glass, has a wide range of applications, including: as a detergent in the manufacture of glass and ceramics; the phosphor is glued to the picture tube and coated on the outside of the welding rod to overcome splashing; Used as a vat dye, fire retardant, welding rod adhesive and inorganic coating binder; it can also be used in the production of soap, medicine, and refractory materials. The main components of potassium silicate are K2O.mSiO2.nH2O, where m and n are different according to the model. Existing potassium silicate basically all adopts quartz sand as raw material, some are prepared by liquid phase method, and some are prepared by solid phase method. The modulus of potassium silicate pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
CPCC01B33/32
Inventor 蔡小伶颜建荣
Owner HANGZHOU WEISHINUOWEI TECH
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