DMC (dimethylcyclosiloxane) production method and DMC production device

Abstract

The invention discloses a DMC (dimethylcyclosiloxane) production method and a DMC production device. The DMC production method includes step 1, inputting crushed recycled plastic, benzenesulfonic acidand sulfuric acid into a twin-screw machine from a raw material tank according to a preset weight ratio, performing premixing to form a premix and outputting the premix; step 2, subjecting the premixoutput by the twin-screw machine to cracking, precipitation, rearrangement and adsorption to form a DMC product. The DMC production method and the DMC production device have the advantages that the crushed recycled plastic, benzenesulfonic acid and sulfuric acid materials are input into the twin-screw machine according to the preset weight ratio, are mixed and dispersed by the twin-screw machine,and are further mixed and ground according to the characteristics of the twin-screw machine, including a small gap between double screws and a high rotating speed; the ground materials are uniformlymixed, the particle size is small, and continuous grinding can be realized; waste and manual transfer of the materials do not exist in the process, the raw materials can be directly input from the corresponding device, and finished products can be output from the output end, so that labor costs are saved, and the production cycle is shortened.

Description

technical field [0001] The invention relates to the technical field of DMC preparation, in particular to a DMC production method and device. Background technique [0002] The primary form of dimethylcyclosiloxane (DMC) is mainly used for ring-opening polymerization to form silicone oil, silicone rubber and silicone resin with different degrees of polymerization. These polymers are further processed into products that are widely used in various fields such as construction, electronics, textiles, automobiles, personal care, food, and mechanical processing, and there are also a small amount of direct applications. [0003] The primary form of dimethylcyclosiloxane is an organic-inorganic compound with dimethyldichlorosilane as the main raw material, which is synthesized by hydrolysis, with silicon-oxygen (Si-O) bonds as the main chain, and silicon atoms directly connected to organic groups. compound. The primary form of dimethylcyclosiloxane has a ring-shaped molecular struct...

AI Technical Summary

Problems solved by technology

[0005] At present, the existing DMC is produced by the traditional reactor process, that is, all the recycled plastics are first crushed and then mixed with benzenesulfonic acid and sulfuric acid for mixing and dispersing. Due to the high degree of manual operation, the transfer process is wasteful and requires a long time for mixing and mixing. Long, high energy consumption, low production efficiency

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