Decolorizing method of alkoxy silane low polymer

Abstract

The invention discloses a decolorizing method of an alkoxy silane low polymer, belonging to the technical field of production of organosilicone. The decolorizing method of the alkoxy silane low polymer comprises the following steps of: a, drying white carbon black to constant weight; b, adding the dried white carbon black into the alkoxy silane low polymer for decolorizing, wherein the specific surface area of the white carbon black is 40-340 m<2> / g; and c, filtering to obtain a decolorized alkoxy silane low polymer. The white carbon black raw materials taking as a decolorizing agent in the decolorizing method disclosed by the invention is readily-available and has low cost; the method has the advantages of good decolorizing effect, high yield and high filtering speed; and residual impurities are eliminated, secondary pollution is avoided, and adverse effects on the purity and mass of an alkoxy silane low polymer product are eliminated.

Description

technical field [0001] The invention relates to a method for decolorizing alkoxysilane oligomers, and belongs to the technical field of organosilicon production. Background technique [0002] Alkoxysilane oligomers are made from silicon tetrachloride and lower aliphatic alcohols. It is an important organic silicon intermediate and can be used in the fields of anti-rust zinc-rich coatings, precision casting and refractory materials. It is a class of fine chemicals with a wide range of uses. Alkoxysilane oligomers are usually produced from polysilicon by-product silicon tetrachloride, lower aliphatic alcohols and water through reaction, distillation, neutralization and filtration processes. In the production process, a large amount of hydrogen chloride gas is produced by-product, which is easy to corrode pipelines and equipment, and generates iron-containing impurities, which seriously pollutes the product and causes the product to change color; in addition, the raw material ...

AI Technical Summary

Problems solved by technology

Chemical methods include oxidation, reduction, and addition methods. Oxidation methods generally use oxidants such as potassium permanganate, concentrated nitric acid, potassium dichromate, and concentrated sulfuric acid to convert ethanol, Impurities such as aldehydes and ketones are oxidized into acetaldehyde and carboxylic acid, and the decolorization effect is poor; the reduction method generally uses reducing agents such as lithium aluminum hydride and sodium borohydride, which are expensive and has poor decolorization effect; the addition method generally uses sodium bisulfite, which has a poor decolorization effect poor effect

It can be seen that alkoxysilane oligomers are not suitable for decolorization by heating and chemical methods

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