Solvent-free process method for continuously producing methyl hydrogen silicone oil

Abstract

The invention discloses a solvent-free process method for continuously producing methyl hydrogen silicone oil. The process method is a production method which uses an organosilicone monomer production by-products-methyldichlorosilane and chlorotrimethylsilane as raw materials and sequentially comprises the steps of hydrolysis, layering, washing extraction, telomerization and oiling so as to prepare methyl hydrogen silicone oil finished products. By means of the solvent-free process method, the defect that an existing traditional intermittent method enables the product efficiency to be low and the quality to be unstable during production and introduces an organic solvent in the traditional production and the like is changed, and the purposes of saving energy and reducing consumption can be achieved. The solvent-free process method has characteristics of environmental pollution reduction and the like, further has the advantages of reducing the production cost, shortening a production period, improving the product quality, increasing finished product yield, being high in industrial operation safety and the like and has good industrial operability.

Description

technical field [0001] The invention relates to the technical field of production of methyl hydrogen-containing silicone oil, in particular to a process for continuously producing methyl hydrogen-containing silicone oil without solvent. Background technique [0002] Methyl hydrogen-containing silicone oil is one of the most important products in silicone oil products. Its siloxane main chain contains living wave group hydrogen, which has high activity and can react with a variety of active groups. Its distinctive features are It is waterproof. In actual use, methyl hydrogen-containing silicone oil can be cross-linked at low temperature to form a film, and form a waterproof layer on the surface of the substance, used as a ceramic antifouling, oil-proof, and waterproof treatment agent; various modified silicone oils and silicone rubbers can be synthesized It can be used as an important intermediate; it can be used as a waterproof and softening agent for natural and synthetic ...

AI Technical Summary

Problems solved by technology

[0004] (1) Most of the existing production processes adopt the "kettle type" batch reaction production process, which easily leads to problems such as low production efficiency;

[0005] (2) In the hydrolysis reaction, solvents such as toluene and petroleum ether are used as the main solvent. After the hydrolysis is completed, the separated oil layer is washed three times with water, and concentrated sulfuric acid is added for telomerization. After filtering, the finished product is obtained, and the operation steps are cumbersome. At the same time, toluene, petroleum ether, etc. are used as solvents, and the product will inevitably have peculiar smell, which also limits the use of the product;

[0006] (3) Alkaline solution is generally introduced into the production system in the subsequent production process, which leads to the production of products lower than high-quality products in terms of color and odor, which limits the use of the product, and at the same time, the product in the process The loss of hydrogen is also very large, the product quality is very unstable, and the consumption of production is much higher than that of foreign production levels, which has greatly limited the production efficiency

[0007] The current situation is that patent documents CN102516545B (method for continuous production of hydrogen-containing silicone oil, 2013.08.07), CN103554502A (solvent-free hydrogen-containing silicone oil and its preparation method, 2014.02.05), CN102030905B (preparation of solvent-free high Silicone oil method, 2012.10.31), CN102643428A (method for preparing methyl hydrogen-containing silicone oil, 2012.08.22), CN103788377A (a production process for continuous production of high hydrogen-containing silicone oil, 2014.05.14) in the existing traditional process Improvements have been made on the basis. First, the production process has been improved, and a continuous production method with higher efficiency than the traditional batch production process has been disclosed, especially the patent documents CN102516545B and CN102030905B, and it is also particularly disclosed that the continuous production depends on The reaction equipment is a reaction kettle, and at the same time, the addition of organic solvents such as toluene and petroleum ether is avoided in the hydrolysis reaction, which effectively improves the product quality of methyl hydrogen silicone oil; on this basis, the patent document CN103788377A proposes A production method of high hydrogen-containing silicone oil with a hydrogen content of 1.56-1.60wt%, but from the perspective of its preparation process, there are also defects such as unstable product quality and low production efficiency. Therefore, the present invention emerges as the times require

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