Method for producing dmc raw material by organosilicon low-ring-opening operation

A technology of organic silicon and raw materials, applied in the direction of silicon organic compounds, etc., can solve the problem of no literature report, and achieve the effect of less operators, low production cost and low price

Active Publication Date: 2015-08-19
TANGSHAN SANYOU SILICON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report on the method of producing DMC raw materials by using organosilicon low-ring open-loop technology at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The production method of embodiment 1 is as follows:

[0032] 1) Transport 1400L silicone low-ring material from the low-ring storage tank to the reactor.

[0033] 2) Raise the temperature of the organosilicon low-ring material to 65°C, let it stand for a period of time for stratification, and drain the acid water in the lower layer.

[0034] 3) Add 10ppm KOH solution and control the ring-opening temperature of D3 to 75°C.

[0035] 4) Take a sample to observe the state of the open-loop material, and add 500L of water after meeting the requirements.

[0036] 5) Sampling and analyzing the viscosity of the material, the D3 residue is 3.91%.

[0037] 6) Pipeline the material to the hydrolyzate storage tank, waiting for cracking and rectification to produce DMC.

[0038] For the parameters of other embodiments 2 to 8, refer to the values ​​expressed in the table; the specific production method is the same as the steps described in embodiment 1; only the specific parameter...

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PUM

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Abstract

The present invention relates to a method for producing a DMC material, and especially relates to the method for producing the DMC material by silicone low-ring opening process through using a silicone low-ring opening technology. The method comprises the following steps delivering the low-ring material from a low ring tank to a reactor; heating the material to 65 DEG C, standing for a period to stratify and drain the lower acidic water; adding a KOH catalyst and keeping the temperature at 65-100 DEG C for carrying out D3 ring opening; sampling and observing the state of the open-loop material, adding water when the requirement is satisfied; conversing the material from the reactor to the tank, waiting for cracking, distilling to produce the DMC. The invention adopts the KOH catalyst, temperature control, water addition and other means to make D3 in low ring react ring opening as far as possible to obtain the material with a small amount of D3 and low viscosity which can be used for cracking and distilling to produce the DMC. This invention possesses high operationality, thereby production cost of DMC can be reduced, and the production capacity of DMC can be increased.

Description

Technical field: [0001] The invention relates to a production method of a DMC raw material, in particular to a method for producing a DMC raw material by using an organosilicon low-ring-opening technology. Background technique: [0002] The known production process of organosilicon DMC is: organosilicon monomer dimethyldichlorosilane (referred to as dimethyl) is hydrolyzed to remove chlorine, and the hydrolyzate of dimethyl is obtained. The hydrolyzate is subjected to vacuum cracking, rearrangement and rectification to obtain DMC, a main silicone product mainly composed of D4 and D5. [0003] The known production process of silicone low ring is as follows: the hydrolyzate undergoes vacuum cracking and rearrangement to obtain the lysate siloxane mixed ring body (mainly composed of D3, D4, D5, D6, D7, D8, D9 and other components). During the process of removing D3 and pre-D3 components in the rectification system of the mixed ring body, a material with D3 as the main content ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/08C07F7/21
Inventor 李索海张建明李允浩陈春江郭佺刘秀芸王宝喜郭文涛
Owner TANGSHAN SANYOU SILICON IND
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