Manufacturing method of dimethyldichlorosilane
Dimethyldichlorosilane (CH3)2SiCl2 is an important organosilicon compound, which is widely used in the field of raw materials for chemical production. This article will introduce the manufacturing method of dimethyldichlorosilane, including raw material preparation, reaction process, post-treatment and precautions.
I. Raw material preparation
1. Methanol: CH3OH, colorless transparent liquid with irritating odor, used as one of the reactants.
2. Silicon powder: Si, gray or black powder, insoluble in water, used as one of the reactants.
3. Copper chloride: CuCl2, yellowish green to brown crystalline powder, used as catalyst.
II. Reaction process
1. Add methanol and silica powder to the reactor in a certain proportion and mix well.
2. Under the condition of stirring, add copper chloride catalyst gradually, and control the appropriate addition speed to keep the reaction temperature stable.
3. Hydrogen and hydrogen chloride gases will be generated during the reaction process, which need to be led out through the pipeline and absorbed.
4. At the end of the reaction, the reaction solution is cooled and filtered to remove solid impurities.
5. The dimethyldichlorosilane product is separated by distillation.
3. Post-treatment
1. Treat the distillation residue and recover the useful substances therein.
2. Emission or further utilization of hydrogen and hydrogen chloride gases after absorption treatment.
3. Clean and maintain the production equipment to ensure the smooth running of the next production.
4. Precautions
1. Strictly control the quality and proportion of raw materials to ensure the smooth running of the reaction.
2. The addition rate of catalyst needs to be appropriate to avoid too intense reaction or generation of by-products.
3. Properly dispose of the hydrogen and hydrogen chloride gases generated to prevent environmental pollution.
4. Keep the equipment running well during the production process, and maintain and overhaul the equipment in time.
Through the above steps, we can manufacture dimethyl dichlorosilane. This compound has a wide range of applications in the field of raw materials for chemical production, so mastering its manufacturing method is of great significance for improving production efficiency and reducing costs. At the same time, attention needs to be paid to safety, environmental protection and other aspects of the production process to ensure the smooth progress of production.
In conclusion, the manufacturing method of dimethyl dichlorosilane involves a number of links and precautions, and needs to be carried out in strict accordance with the operating procedures. Through reasonable preparation of raw materials, control of the reaction process, post-treatment and observance of precautions, we can produce high-quality dimethyl dichlorosilane products and provide a stable supply of raw materials for the production of chemicals.
