Monomethylhydrodichlorosilane (MeSiHCl2) is an important organosilicon compound that is widely used in the production of chemicals. In this article, we will introduce a common manufacturing method of monomethylhydrodichlorosilane.
I. Raw material preparation
1. Methylchlorosilane (MeSiCl3): as the main raw material, methylchlorosilane can be produced by reacting silicon metal with chloromethane.
2. Hydrogen (H2): as a reducing agent, it is used to reduce chlorine atoms in methylchlorosilane.
3. Catalyst: Precious metals such as platinum and palladium are usually chosen as catalysts to improve the reaction rate and selectivity.
II. Reaction process
1. Mix methylchlorosilane with hydrogen in a certain proportion and introduce catalyst.
2. Under a certain temperature and pressure, hydrogen and methylchlorosilane undergo a reduction reaction to produce monomethylhydrodichlorosilane.
Reaction equation: MeSiCl3 + H2 → MeSiHCl2 + HCl
3. Separate the monomethylhydrodichlorosilane generated by the reaction from the reaction system by means of distillation, condensation, etc. and remove unreacted raw materials and by-products.
3. Post-treatment
1. Purify the separated monomethylhydrodichlorosilane to remove the impurities.
2. Store the purified monomethylhydrodichlorosilane for subsequent use.
4. Precautions
1. During the whole manufacturing process, parameters such as reaction temperature and pressure need to be strictly controlled to ensure the smooth progress of the reaction and the quality of the product.
2. The activity of catalyst needs to be tested regularly to ensure its catalytic effect.
3. In the operation process, safety needs to be paid attention to in order to avoid the occurrence of accidents such as hydrogen leakage.
In conclusion, the manufacturing method of monomethylhydrodichlorosilane involves a number of links, and the operating conditions and parameters of each link need to be strictly controlled to ensure the quality and yield of the product. Meanwhile, safety needs to be paid attention to in the operation process to avoid accidents.
