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Method for preparing ethyl silicate and magnesium fluoride from silicon tetrafluoride, ethanol and magnesium

A silicon tetrafluoride, ethyl silicate technology, applied in magnesium fluoride, magnesium halide, silicon organic compounds and other directions, can solve problems such as unreasonable utilization of silicon tetrafluoride, achieve novel process route, extend industrial chain, simple steps

Inactive Publication Date: 2013-04-24
云天化集团有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the existing unreasonable technical defects in the use of silicon tetrafluoride, and to provide a high value-added ethyl silicate prepared by reacting silicon tetrafluoride, a by-product of phosphate fertilizer enterprises, with magnesium powder in ethanol and magnesium fluoride, and the process will not produce difficult-to-handle waste that pollutes the environment, a method that can efficiently utilize phosphate fertilizers to produce by-product silicon tetrafluoride

Method used

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  • Method for preparing ethyl silicate and magnesium fluoride from silicon tetrafluoride, ethanol and magnesium

Examples

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Effect test

Embodiment 1

[0022] Add 100 mL of ethanol and 3.0 g of 38-micron magnesium powder into the reaction kettle, stir at 78°C for 2 h, then add 29.6 g of silicon tetrafluoride ethanol solution with a mass fraction of 22% into the reaction kettle until the reaction The system is neutral. After stirring for about 2 hours, filter the reaction system, wash the filter cake with ethanol and dry to obtain magnesium fluoride. The washing solution and filtrate are combined to remove unreacted ethanol under reduced pressure to obtain ethyl silicate .

Embodiment 2

[0024] Add 100 mL of ethanol and 3.0 g of 38-micron magnesium powder into the reaction kettle, stir at 78°C for 1.5 h, then add 29.6 g of silicon tetrafluoride ethanol solution with a mass fraction of 22% into the reaction kettle until the reaction The system is neutral. After stirring for about 4 hours, filter the reaction system, wash the filter cake with ethanol and dry to obtain magnesium fluoride. The washing solution and filtrate are combined to remove unreacted ethanol under reduced pressure to obtain ethyl silicate .

Embodiment 3

[0026] Add 100 mL of ethanol and 3.0 g of magnesium powder with a size of 5 microns into the reaction kettle, and after stirring for 2 h at 40 °C, add 65.1 g of silicon tetrafluoride ethanol solution with a mass fraction of 10% into the reaction kettle until the reaction The system is neutral. After stirring for about 4 hours, filter the reaction system, wash the filter cake with ethanol and dry to obtain magnesium fluoride. The washing solution and filtrate are combined to remove unreacted ethanol under reduced pressure to obtain ethyl silicate .

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Abstract

The invention relates to the technical field of chemical industry and in particular relates to a method for preparing ethyl silicate and magnesium fluoride by utilizing reactions of silicon tetrafluoride, ethanol and magnesium. The method comprises the following steps of: a. adding ethanol and magnesium powder to a reaction kettle; b. raising the temperature of the reaction system to a preset temperature to react; c. after reaction is completed, cooling the reaction system, adding prepared ethanol solution of silicon tetrafluoride to the reaction kettle until the reaction system is neutral; d. separating solid from liquid through filtration; e. washing the solid obtained in step d with ethanol and drying the washed solid to obtain the target product magnesium fluoride; and f. distilling the filtrate obtained in step d to remove ethanol, thus obtaining ethyl silicate with high boiling point. The method can be used for producing by-product silicon tetrafluoride by efficiently utilizing phosphate fertilizers.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a method for producing ethyl silicate and magnesium fluoride by using silicon tetrafluoride gas, ethanol and magnesium powder, especially for the high-benefit comprehensive utilization of fluorine and silicon resources in the by-products of phosphate fertilizer enterprises Methods. [0002] Background technique [0003] Ethyl silicate is a colorless flammable liquid and is an organic silicon compound. Ethyl orthosilicate is relatively easy to polymerize, so ethyl orthosilicate and its polymers are generally sold on the market, usually according to the SiO in the product 2 content, to determine the different grades, specifications have two kinds of CP and AR. The polyethyl silicate produced after hydrolysis is composed of polymers with different degrees of polymerization, so its SiO 2 The content is represented by the average value, and according to the degree of polymerizati...

Claims

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Application Information

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IPC IPC(8): C07F7/04C01F5/28
Inventor 黄忠李玉叶梁雪松田强
Owner 云天化集团有限责任公司
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