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Synthesis method for producing hydroxy silicone oil from waste silicone rubber

A technology of hydroxy silicone oil and synthesis method, applied in recycling technology, plastic recycling and other directions, can solve problems such as waste of resources and aggravate environmental burden, and achieve the effect of avoiding pollution and good economic benefits

Inactive Publication Date: 2017-05-31
扬州宏远新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cause waste of resources and increase the burden on the environment

Method used

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  • Synthesis method for producing hydroxy silicone oil from waste silicone rubber
  • Synthesis method for producing hydroxy silicone oil from waste silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The present invention is carried out according to the following process steps: extract the dimethylsiloxane mixed ring body in the waste silicone rubber into the reaction kettle, raise the temperature of the crude oil to 93°C, add acetic anhydride, use sulfuric acid as a catalyst, Polymerize at low temperature for 4 hours; then raise the temperature to 155°C, remove low molecular weight, cool to 70°C, then add water and sodium carbonate for neutralization reaction to neutrality, and obtain hydroxyl silicone oil after cooling.

Embodiment 2

[0013] The present invention is carried out according to the following process steps: extract the dimethylsiloxane mixed ring body in the waste silicone rubber into the reaction kettle, raise the temperature of the crude oil to 90°C, add acetic anhydride, use sulfuric acid as a catalyst, Polymerize at low temperature for 3.5 hours; then raise the temperature to 160°C to remove low molecular weight, cool to 60°C, then add water and sodium carbonate for neutralization reaction to neutrality, and obtain hydroxyl silicone oil after cooling.

Embodiment 3

[0015] The present invention is carried out according to the following process steps: extract the dimethylsiloxane mixed ring body in the waste silicone rubber into the reaction kettle, raise the temperature of the crude oil to 100°C, add acetic anhydride, use sulfuric acid as a catalyst, Polymerize at low temperature for 3.5-5 hours; then raise the temperature to 150°C to remove low molecular weight, cool to 70°C, then add water and sodium carbonate to neutralize the reaction to neutrality, and obtain hydroxyl silicone oil after cooling.

[0016] Reaction equation of the present invention is:

[0017]

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Abstract

The present invention relates to a synthesis method for producing hydroxy silicone oil from waste silicone rubber. The process steps comprise: sucking the dimethylcyclosiloxane in waste silicone rubber into a reaction kettle, heating crude oil to a temperature of 90-100 DEG C, adding acetic anhydride, carrying out a polymerization reaction for 3.5-5 h under a negative pressure condition by using sulfuric acid as a catalyst, heating to a temperature of 150-160 DEG C, removing the low molecular weight molecule, cooling to a temperature of 60-80 DEG C, adding water and sodium carbonate, carrying out a neutralization reaction to achieve a neutral state, and cooling to prepare the hydroxy silicone oil. According to the present invention, by using high-temperature cracking and other advanced technologies, waste computers, mobile phone keys, waste glass glues and other waste silicone rubbers produced in production and life are subjected to high temperature cracking to produce the hydroxy silicone oil; and with the synthesis method, the waste is re-utilized to obtain the silicone oil having the high economic value, such that the good economic benefits are obtained, and the environment pollution is avoided.

Description

technical field [0001] The invention relates to a method for synthesizing hydroxy silicone oil, in particular to a method for producing hydroxy silicone oil using dimethylsiloxane mixed rings produced from waste silicone rubber. Background technique [0002] In the past, the production process of amino silicone oil in my country was generally to extract organosilicon monomers from crustal rocks to produce hydroxyl silicone oil. This process is relatively complicated and consumes a lot of energy. [0003] Nowadays, my country's economy is developing rapidly, and industries such as electronics, communications, and IT are advancing by leaps and bounds, and more and more waste silicone rubber is produced. These waste silicone rubbers cannot be degraded in the natural environment, and they could only be landfilled in the past. Cause waste of resources and increase the burden on the environment. Contents of the invention [0004] The present invention aims at the above defects,...

Claims

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Application Information

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IPC IPC(8): C08G77/16C08J11/10
CPCY02W30/62
Inventor 赵剑王明
Owner 扬州宏远新材料股份有限公司
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