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Method and device for preparing high-boiling silicon oil

A technology for high-boiling silicone oil and high-boiling substance, which is applied in the field of preparing high-boiling silicone oil, can solve the problems of limited industrialization and application, high viscosity of high-boiling silicone oil, difficult filtration operation, etc., so as to increase added value, reduce dosage and improve production. The effect of efficiency

Inactive Publication Date: 2014-12-10
HUBEI XINGFA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively high viscosity of the high-boiling silicone oil prepared by this type of process, the filtration operation is difficult and takes a long time. At the same time, the filter residue obtained by filtration is not easy to handle, which also limits the industrialization of this process to a certain extent. Promote application

Method used

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  • Method and device for preparing high-boiling silicon oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 100 parts by weight of high boilers in the organic silicon slurry to the enamel reaction kettle, start the reaction kettle to stir, and add ethanol and water mixed solvent (ethanol:water (V / V)=1:0.1) to the kettle dropwise at room temperature 60 Parts by weight, control the reaction speed, the hydrogen chloride gas produced by the reaction is sent to the water washing tower for absorption and treatment; after the ethanol water solvent is added dropwise, raise the temperature of the reaction kettle to 75°C, open the compressed air valve at the bottom of the kettle, control the air flow rate, and continue the reaction 2h; The liquid after the complete reaction is transported to the high level tank of the acid separation by a magnetic pump to stand for stratification, and the crude acidic silicone oil and glycolic acid solution are obtained; the glycolic acid solution is injected into the ethanol distillation tank for purification and then reacts with the high boiler aga...

Embodiment 2

[0024] Other implementation conditions are the same as 1. When ethanol and water are mixed solvents (ethanol: water (V / V) = 1:0.3), the viscosity of the obtained high boiling silicone oil (25°C, mm 2 / s): 42.36, Refractive index (25°C): 1.4456.

Embodiment 3

[0026] Other implementation conditions are the same as 1. When ethanol and water are mixed solvents (ethanol: water (V / V) = 1:0.01), the viscosity of the obtained high-boiling silicone oil (25°C, mm 2 / s): 19.47, Refractive index (25°C): 1.4489.

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Abstract

The invention provides a method and device for preparing high-boiling silicon oil. The method comprises the following steps: reacting high-boiling substances in organic silica slag slurry with an alcohol-water mixed solvent, and introducing compressed air to backflush the reaction solution at certain temperature to remove hydrogen chloride gas, thereby obtaining rough acidic silicon oil and an alkyd solution; and distilling the alkyd solution, reacting with the high-boiling substances, reacting the rough acidic silicon oil under the actions of a neutralizer, a fluxing agent and a right amount of water for some time, standing to stratify, and discharging the understratum brine solution, thereby obtaining the finished neutral high-boiling silicon oil product. The neutral high-boiling silicon oil has the advantages of controllable viscosity and stable quality. The method reduces the consumption of the neutralizer, lowers the industrial production cost, can easily implement industrial production, lowers the industrial investment cost, saves abundant filtering time, and enhances the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical organosilicon production, and in particular relates to a method for preparing high-boiling silicone oil by using high-boiling substances in organic silicon slag slurry. Background technique [0002] With the rapid development of the organosilicon industry, the output of organosilicon chlorosilane monomers is also increasing. It is estimated that by the end of this year, the total production capacity of domestic organosilicon monomer manufacturers will be about 2500kt / a. Organosilicon high boilers are one of the by-products of the production of organosilane chlorosilane monomers. There are two main sources: one is obtained through rectification of organosilane chlorosilane monomers. This type of high boilers accounts for about About 5%, it is easier to carry out industrial development and utilization; the second is derived from organic silicon slurry, this type of high boiling matter accounts fo...

Claims

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Application Information

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IPC IPC(8): C08G77/388C08G77/398C08G77/04C08G77/06
Inventor 苗刚陈海平王文金汪民康黄潇
Owner HUBEI XINGFA CHEM GRP CO LTD
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