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Process for treating mixtures in presence of packings of fluorated vinylpolymers

A technology for vinyl polymers and mixtures, applied in chemical instruments and methods, chemical/physical/physical chemical processes, chemical/physical processes, etc., to solve problems such as unstable quality, unstable water content, and difficult polymer processing

Inactive Publication Date: 2007-01-31
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further processing of the polymer is difficult due to variable quality, variable water content and the presence of aluminum and iron compounds

Method used

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Embodiment Construction

[0008] In processing containing HCl, H 2 Under the main condition of the mixture of O and siloxane, the fluorinated vinyl polymer filler has chemical stability, mechanical stability and thermal stability.

[0009] The fluorinated vinyl polymer may be partially or fully fluorinated, preferably a fluorinated vinyl polymer consisting of structural units of formula 1

[0010] -(CR 2 -CF 2 ) n - (1),

[0011] wherein R represents hydrogen or fluorine.

[0012] The value of n is preferably at least 100, particularly preferably at least 500.

[0013] Particularly preferred are polyvinylidene fluoride (PVDF) and polytetrafluoroethylene (PTFE).

[0014] The packing can have any shape, for example rings, spirals and saddles are suitable, they preferably have interrupted walls and / or struts to increase their surface area. Particular preference is given to Pall rings.

[0015] In addition to HCl, H 2 In addition to O and siloxanes, the process...

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Abstract

The invention relates to a method for processing mixtures which contain HCl, H2O and siloxanes in the presence of packings comprising fluorinated vinyl polymers.

Description

technical field [0001] The present invention relates to the processing of compounds containing HCl, H in the presence of fluorinated vinyl polymer fillers 2 O and siloxane mixture method. Background technique [0002] Silicone oils or polyorganosiloxanes are produced by the polymerization of cyclic or linear polydiorganosiloxane intermediates by hydrolysis and polycondensation of diorganodichlorosilanes . Hydrochloric acid is usually used as the source of reaction water required for hydrolysis. The hydrogen chloride produced by the hydrolysis reacts with methanol to form methyl chloride and is used again for the synthesis of dimethyldichlorosilane according to the direct synthesis method. [0003] In this case, the product containing HCl, H 2 A mixture of O and siloxane. For example US 3,493,595 A and US 5,476,916 A describe the production of α,ω-dihydroxypolydiorganosiloxanes from crude hydrolysates consisting of cyclic and linear chlorine-containing polydiorganosiloxa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/24C08G77/50B01J19/30
CPCB01J2219/30203C08G77/06B01J2219/30215B01J2219/30466B01J2219/30265B01J19/30
Inventor 斯特凡·博伊特尔豪泽赫尔穆特·恩塔姆尔克劳斯·克普勒
Owner WACKER CHEM GMBH
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