Method for preparing high boiling silicone oil by using organic silicon high boiling substances

A high-boiling silicone oil and high-boiling technology, applied in the field of organosilicon high-boiling to produce high-boiling silicone oil, can solve the problems of increased chlorine content, uncontrollable viscosity and high cost in the product, and achieve extended storage time, stable quality, The effect of reducing chlorine content

Inactive Publication Date: 2009-08-26
SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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AI Technical Summary

Problems solved by technology

There are following deficiencies in the above method: (1) adopt methanol to react with high boiler at normal temperature, cause reaction time to be long and chlorine atom can not be replaced completely, chlorine content increases in the product, and product quality is not high; (2) adopt methanol and organic Silicon high boiler reaction also has problems such as high cost, lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1: A method for preparing high-boiling silicone oil using organosilicon high-boiling substances, the steps are as follows:

[0029] Pump 100 parts of silicone high-boiling substance into the enamel kettle, start stirring at room temperature, add dropwise a mixed solution of 55 parts of ethanol and 3 parts of water to the silicone high-boiling substance, and add dropwise to half of the total mixed solution When the temperature was started, the temperature rose to 70°C when the dripping was completed, and the temperature was continued to rise to 80°C and refluxed for 2 hours, and then nitrogen was purged at 60°C for 1 hour to obtain acid silicone oil. The hydrogen chloride gas produced in the dripping process is sent to the spray tower through a fan for recovery.

[0030] At a constant temperature of 45°C, add 30 parts of urea from the hand hole of the reactor, then add 3 parts of zinc oxide, and finally add 20 parts of ammonium bicarbonate for neutralization. Ammoniu...

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PUM

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Abstract

The invention relates to a method for preparing high boiling silicone oil by using organic silicon high boiling substances, comprising hydrolyzation of alcohol and neutralization, wherein the organic silicon high boiling substances are hydrolyzed in the mixed liquid of alcohol and water and refluxed for 1-4 hours; nitrogen purging is carried out on the reactant, and then the reactant is added with hydrogen chloride dissolved in urea, zinc oxide and ammonium bicarbonate and in the system thereof. The invention integrally uses the organic silicon high boiling substances and lowers the chlorine content in silicon oil products, ensures the molecular weight and viscosity to be controllable and mass to be more stable; the usage of the neutralizing agent and latent solvent is reduced greatly, thus reducing the production cost; the process is simple and the industrial production is easy.

Description

technical field [0001] The invention relates to a method for preparing silicone oil, in particular to a method for producing high-boiling silicone oil from organosilicon high boilers. Background technique [0002] In recent years, with the rapid development of the organosilicon industry, the output of methyl chlorosilane monomer is increasing, which leads to the increasing output of by-product organosilicon high boilers. However, organosilicon high boilers cannot be made into useful organosiloxanes by simple methods due to their complex components, containing a large amount of silicon powder impurities, and easily releasing a large amount of corrosive hydrogen chloride gas when exposed to moisture. It has become a prominent problem encountered in the production of organic silicon monomers. [0003] At present, domestic and foreign researches on the conversion and utilization of organosilicon high boilers are mainly focused on the methods of cracking to produce chlorosilane ...

Claims

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Application Information

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IPC IPC(8): C08G77/388
Inventor 胡生祥刘娜桑圣凯
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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