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Method for refining organosilicon hybrid ring body

A technology of mixing rings and refining methods, which is applied in the direction of silicon organic compounds, can solve the problems of easy introduction of carbon black impurities, cumbersome process steps, and inability to remove them, and achieve the effects of improving quality grades, simple processes, and low production costs

Active Publication Date: 2011-05-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process steps are cumbersome, the cost is high, and carbon black impurities are easily introduced
[0006] The article "Research on the Dehydration of Organosilicon in Pervaporation Rings" mentions the use of pervaporation membrane separation technology to remove water in organosilicon rings. The outstanding features are high separation efficiency, low energy consumption, simple process, and convenient operation. The method is very effective for dehydration, but it cannot remove other impurities in the ring body, especially the removal of chloride ions, which has a great impact on the quality of the ring body, has no effect

Method used

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  • Method for refining organosilicon hybrid ring body
  • Method for refining organosilicon hybrid ring body
  • Method for refining organosilicon hybrid ring body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Macroporous polystyrene resin is pretreated before use: wash with water first to remove fine powder of resin and a small amount of mechanical impurities. Then release water, rinse with four times the amount of 95% ethanol to wash away the residual organic matter in the resin, and finally treat it dynamically with deionized water for 30 minutes, and use a vacuum oven at 50°C and 720mmHg for 4 hours to remove part of the water.

[0021] Treatment of the mixed ring: use a φ60mm glass column, fill it with 120mm of treated resin, and control the flow rate of the mixed ring at 1000ml / h under normal temperature and pressure to adsorb impurities in the mixed ring.

[0022] The mixed ring body before and after treatment was tested for its chloride ion content by ion chromatography, and the results are shown in the attached table. The impurity content of the mixed ring body before and after treatment was measured by high performance liquid chromatography.

Embodiment 2

[0024] Adopt polar macroporous resin, resin filling height is 240mm, other is the same as embodiment 1.

Embodiment 3

[0026] Adopt non-polar resin, the outflow velocity of mixed ring body is 100ml / h, other is the same as embodiment 2.

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Abstract

The invention relates to method for refining an organic silicon hybrid ring body. A resin adsorption method is adopted to refine the ring body to reduce the impurity content therein. The method has the advantages that the process is simple, the production cost is low, the refine effect is good, the resin can be reutilized for 30 times or more, and the method is suitable for the industrial production and can meet the requirement for processing a top organic silicon product.

Description

technical field [0001] The invention relates to a method for refining an organosilicon mixed ring body, which mainly uses a macroporous resin to remove harmful impurities in the ring body. Background technique [0002] Dimethyldichlorosilane ((CH 3 ) 2 SiCl 2 ) is an important monomer for the preparation of silicone polymers, accounting for more than 80% of the total amount of mixed monomers. Monomers cannot be directly used to make silicone oil and silicone rubber, (CH 3 ) 2 SiCl 2 It needs to undergo water cracking to obtain the organosilicon mixed ring body, mainly including octamethylcyclotetrasiloxane, hexamethylcyclotrisiloxane, etc. The quality of the mixed ring has a great influence on the performance of the end product in the silicone production process and plays a pivotal role. At present, domestic organosilicon polymer manufacturers basically use mixed rings as raw materials to produce various polymers. Due to the poor quality of mixed rings, some high-qual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/21C07F7/20
Inventor 王刚杨金胜付学红周遵石翟荣霞李洪福
Owner PETROCHINA CO LTD