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Continuous esterification production process of polyethyl silicate

A polyethyl silicate and production process technology, applied in the field of silicon chemical industry, can solve the problems of long reaction cycle, high production cost, unstable product quality, etc., and achieve the goal of reducing labor costs, reducing environmental pressure, and stable and uniform product quality Effect

Inactive Publication Date: 2013-10-23
淄博市临淄齐泉工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problems of high production cost and long reaction cycle and unstable product quality caused by intermittent production in the production of polysilicate in the prior art, and provide a polysilicate The continuous esterification production process, especially the continuous esterification production process of polyethylsilicate synthesized by the by-product silicon tetrachloride produced as a side reaction in the production of chloropropyl coupling agent, in order to achieve continuous production and shorten the reaction cycle

Method used

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  • Continuous esterification production process of polyethyl silicate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Such as figure 1 Shown, silicon tetrachloride storage tank 1 and ethanol storage tank 8 are respectively connected to the top of synthetic tower 3 by pipeline, and silicon tetrachloride storage tank 1 connecting pipeline is provided with the first transfer pump 2, ethanol storage tank 8 The connecting pipeline is provided with a second transfer pump 7, and the top of the synthesis tower 3 is provided with a spout for silicon tetrachloride and ethanol raw materials, so that the raw materials are continuously sprayed out in the form of small droplets during synthesis. The bottom third of the tower section of the synthesis tower 3 is provided with an air inlet, from which water vapor and inert light components 10 are filled to form a countercurrent flow with the falling liquid droplets. The top of the synthesis tower 3 has an interface connected with a vacuum pump, so as to obtain the negative pressure environment required for the reaction, and continuously suck out the hy...

Embodiment 2

[0024] Reaction device is with embodiment 1, and concrete processing steps are as follows:

[0025] 1. According to the mass ratio batching of effective silicon tetrachloride and ethanol 1: 1.20, the by-product silicon tetrachloride raw material with a mass fraction of 95% is squeezed into silicon tetrachloride storage tank 1; 95% ethanol raw material is added into ethanol storage tank Tank 8 is ready for use;

[0026] 2. Turn on the vacuum pump to evacuate, control the vacuum degree in the synthesis tower 3 at 0.01-0.05MPa, pump in the by-product silicon tetrachloride raw material from the top of the tower at a rate of 150Kg / h and pump in 95% of the by-product silicon tetrachloride at a rate of 180Kg / h The ethanol raw material is filled with water vapor and inert light components 10 from one-third of the tower section. The filling rate of water vapor is 9.9Kg / h, and the rate of inert gas filling varies with the degree of vacuum. Keep the temperature of the kettle at 83°C, ma...

Embodiment 3

[0029] Reaction device is with embodiment 1, and concrete processing steps are as follows:

[0030] 1. According to the mass ratio batching of effective silicon tetrachloride and ethanol 1: 1.16, the by-product silicon tetrachloride raw material with a mass fraction of 92% is squeezed into silicon tetrachloride storage tank 1; 95% ethanol raw material is added to the ethanol storage tank 8 for use;

[0031] 2. Turn on the vacuum pump to evacuate, control the vacuum degree in the synthesis tower 3 at 0.01-0.05MPa, pump in the by-product silicon tetrachloride raw material from the top of the tower at a rate of 150Kg / h and pump in 95% of the by-product silicon tetrachloride at a rate of 168Kg / h The raw material of ethanol is filled with water vapor and inert light components 10 from one-third of the tower section. The filling rate of water vapor is 7.4Kg / h, and the filling rate of inert gas changes with the degree of vacuum. Keep the temperature of the kettle at 77°C, make the m...

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Abstract

The invention discloses a continuous esterification production process of polyethyl silicate, belongs to the technical field of silicon chemical engineering, and particularly relates to a production process of the polyethyl silicate, in particular to a production process for directly and continuously producing the polyethyl silicate by using silicon tetrachloride with lower purity. The production process comprises the following steps: performing an esterification process in a synthetic tower; pumping silicon tetrachloride and 95% ethanol used as raw materials from a tower top; filling vapour and inert light components from a 1 / 3 position of a tower section to keep a certain kettle temperature so as to ensure full reaction in the synthetic tower; and removing hydrogen chloride gas under vacuum and continuously extracting polyethyl silicate esterifying liquid. The purity yield of the polyethyl silicate obtained by the process meets the market requirement, the production operation is simple and easy, the labour resources are saved, the process operation is continuous and stable, and therefore, the production efficiency of an enterprise is effectively improved, and production increase and income creating are achieved.

Description

technical field [0001] A continuous esterification production process of polyethylsilicate belongs to the technical field of silicon chemical industry, and specifically relates to a production process of polyethylsilicate, especially the direct synthesis of polyethylsilicate with relatively low-purity silicon tetrachloride A production process for continuous production. Background technique [0002] Ethyl polysilicate is one of the main raw materials for the preparation of chemical-resistant coatings, heat-resistant coatings, silicone solvents, investment casting adhesives, and infinite zinc-rich primers. At present, the production of ethyl silicate mostly adopts a batch-type production process: pure silicon tetrachloride and ethanol are reacted in a batch kettle, the synthetic liquid after the reaction is rectified, and then the unreacted ethanol is distilled out to obtain ethyl silicate. The batch production method has a long reaction cycle and unstable product quality be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/02
Inventor 孔德强刘继国谢正涛
Owner 淄博市临淄齐泉工贸有限公司