Method for preparing inertia high-boiling silicone oil from organic silicone high-boiling residues

Abstract

The invention discloses a method for preparing inertia high-boiling silicone oil from organic silicone high-boiling residues. With organic silicone high-boiling residues as the reaction raw material, the method includes the four steps of hydrolysis, hydrosilylation, neutralization, and devolatiligation and decoloration. The organic silicone high-boiling residues as the raw material are rectified high-boiling residues or decomposed high-boiling residues. The rectified high-boiling residues are high-boiling residues obtained by separating dimethyldichlorosilance out of the organic silicone high-boiling residues in advance through rectification. The decomposed high-boiling residues are high-boiling residues obtained by decomposing the organic silicone high-boiling residues in advance through a decomposing device and separating out monosilane. The decomposed high-boiling residues or rectified high-boiling residues which are difficult to process and use are used as the raw material, and the inertia high-boiling silicone oil which is controllable in viscosity, low in activity and high in stability is prepared through hydrolysis, addition and other reaction. The method is controllable in reaction process, simple in post-processing method, conventional in reaction device, high in production efficiency, stable in product quality and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing high-boiling silicone oil, in particular to a method for preparing inert high-boiling silicone oil by using organosilicon high-boiling matter. Background technique [0002] Organosilicon high boilers are a yellow, pungent and highly corrosive high-boiling chlorosilane mixture produced during the synthesis of methylchlorosilane monomers. Silicon-silicon bonds, silicon-carbon-silicon, silicon -Oxygen-silicon bonds, and also contain insoluble Cu, Zn, Al and a small amount of fine silicon powder left over from the synthesis reaction. The density of silicone high boiler is about 1.13g / cm 3 , the boiling range is 80-215°C. [0003] With the rapid development of the world's organosilicon industry, the output of methylchlorosilane is increasing, resulting in a large amount of organosilicon high boilers; in the process of synthesizing methylchlorosilane by direct method, every ton of crude monomer synthesized, ...

AI Technical Summary

Problems solved by technology

The preparation process uses methanol and chlorine groups in high-boiling substances to carry out alkoxy substitution, but in general, complete substitution cannot be achieved, and alkoxy groups are unstable, resulting in uncontrollable viscosity of high-boiling silicone oil products and low product quality , poor stability

[0010] Alcoholyzed high-boiling silicone oil is essentially an alkoxysilane with complex components and difficult quality control. The alkoxy group has high reactivity and will undergo cross-linking reaction when it meets water or moisture, resulting in the loss of silicone oil. Viscosity increases, even becomes elastic, which seriously affects its application