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Preparation method of large granular potassium fluosilicate

A technology of potassium fluorosilicate and large particles, which is applied in the field of preparation of large particles of potassium fluorosilicate, which can solve the problems of difficult drying, low yield and fine particle size of the production method of potassium fluorosilicate, and achieve reduction in processing Low cost, easy drying, uniform distribution effect

Active Publication Date: 2014-12-17
福建三明金氟化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still some problems in the traditional production process of potassium fluorosilicate: 1) The production method of potassium fluorosilicate has a low yield, and the current production of potassium fluorosilicate The yield is only about 85%; 2) Potassium fluorosilicate products have high chloride ion content; 3) The product has fine particle size and poor fluidity. , easy to agglomerate when drying, not easy to dry, easy to change color, large dust when drying and using

Method used

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  • Preparation method of large granular potassium fluosilicate
  • Preparation method of large granular potassium fluosilicate
  • Preparation method of large granular potassium fluosilicate

Examples

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Effect test

Embodiment 1

[0032] A preparation method for large particle potassium fluorosilicate, comprising the following steps:

[0033] (1) First add 200kg potassium fluorosilicate mother liquor to the synthesis tank;

[0034] (2) Turn on the steam, stir and heat up to 70°C;

[0035] (3) Add magnesium sulfate, open the feeding valves of the fluosilicic acid solution and the potassium chloride solution at the same time, turn on the agitator, adjust the stirring speed to 30 rpm, calibrate the feeding amount and feeding speed, and the feeding speed of the fluosilicic acid is 21.1kg / minute, the feeding speed of Repone K is 20kg / minute, after feeding intake ends; After continuing to stir and react for 5 minutes, stop stirring, leave standstill and settle for 7 minutes, and the supernatant liquid is emitted;

[0036] (4) Adjust the reaction temperature to 65°C, and complete the second feeding according to the operation of step (3);

[0037] (5) Adjust the reaction temperature to 60°C, and complete t...

Embodiment 2

[0045] A preparation method for large particle potassium fluorosilicate, comprising the following steps:

[0046] (1) First add 200kg potassium fluorosilicate mother liquor to the synthesis tank;

[0047] (2) Turn on the steam, stir and heat up to 70°C;

[0048] (3) Add magnesium sulfate, open the feeding valves of the fluosilicic acid solution and the potassium chloride solution at the same time, turn on the agitator, adjust the stirring speed to 40 rpm, calibrate the feeding amount and feeding speed, and the feeding speed of the fluosilicic acid is 28.31kg / minute, the feeding speed of Repone K is 15kg / minute, after feeding, stop stirring, leave standstill and settle for 10 minutes, the supernatant liquid is emitted;

[0049] (4) Adjust the reaction temperature to 65°C, and complete the second feeding according to the operation of step (3);

[0050] (5) Adjust the reaction temperature to 60°C, and complete the third feeding according to the operation of step (3);

[005...

Embodiment 3

[0058] A preparation method for large particle potassium fluorosilicate, comprising the following steps:

[0059] (1) First add 300kg potassium fluorosilicate mother liquor to the synthesis tank;

[0060] (2) Turn on the steam, stir and heat up to 70°C;

[0061](3) Add magnesium sulfate, open the feeding valves of the fluosilicic acid solution and potassium chloride solution at the same time, turn on the agitator, adjust the stirring speed to 35 rpm, calibrate the feeding amount and feeding speed, and the feeding speed of the fluosilicic acid is 15kg / Minutes, the feeding rate of Repone K is 15.5kg / min, after the feeding finishes, after continuing to stir and react for 7 minutes, stop stirring, leave to settle for 12 minutes, and the supernatant liquid is emitted;

[0062] (4) Adjust the reaction temperature to 65°C, and complete the second feeding according to the operation of step (3);

[0063] (5) Adjust the reaction temperature to 60°C, and complete the third feeding acc...

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Abstract

The invention belongs to the technical field of production of chemical products, and in particular relates to a preparation method of large granular potassium fluosilicate. The preparation method comprises the following steps: firstly, adding potassium fluosilicate mother liquid into a synthetic tank, and feeding a fluosilicic acid solution and a potassium chloride solution at 70 DEG C to complete the first feeding; secondly, respectively completing the second feeding, the third feeding, the fourth feeding and the fifth feeding at 65 DEG C, 55 DEG C and 50 DEG C according to previous operations. The particle sizes of potassium fluosilicate particles are as follows: the particle size of more than 50% of the potassium fluosilicate particles is equal to 100 meshes, and the particle size of less than 5% of the potassium fluosilicate particles is equal to -325 meshes. The potassium fluosilicate particles disclosed by the invention have the advantages as follows: the potassium fluosilicate particles are convenient for suction filtration in production operation, are convenient to dry in a drying process, can not be agglomerated and discolored, and the like. Large granular potassium fluosilicate disclosed by the invention is more suitable for the field of optical glass production, is good in fluidity and uniform in distribution, is less in dust in use, and has market competitiveness. In a preparation process, the fluosilicic acid solution and potassium chloride solution are fed into the synthetic tank for a plurality of times, so that the preparation method disclosed by the invention is beneficial for full implementation of double decomposition reaction, improves the yield of products, and has the yield of more than 92%; in addition, mother liquid water is recycled, so that the wastewater treatment cost can be reduced, and the market competitiveness can be provided.

Description

technical field [0001] The invention belongs to the production technical field of chemical products, and in particular relates to a preparation method of large-grain potassium fluorosilicate. Background technique [0002] Potassium fluorosilicate is mainly used in wood preservation, ceramic manufacturing, aluminum and magnesium smelting, agricultural pesticides, and also in optical glass manufacturing, synthetic mica and enamel manufacturing. The existing potassium fluorosilicate is mainly produced by fluoride salt production enterprises and phosphorus chemical enterprises. At present, the production of potassium fluorosilicate is mostly produced by the process of fluosilicic acid and organic fluorine by-products of phosphorus chemical or hydrofluoric acid production enterprises. The spent potassium chloride reacts to generate potassium fluorosilicate precipitate, and after treatment, potassium fluorosilicate product is obtained. [0003] However, there are still some probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/10
Inventor 张蒙左立勇吴文敬
Owner 福建三明金氟化工科技有限公司