Manufacturing method of monomethyltrichlorosilane
Monomethyltrichlorosilane (CH3SiCl3) is an important organosilicon compound, widely used in the field of raw materials for chemical production. This article will introduce a common manufacturing method of monomethyltrichlorosilane.
I. Raw materials and equipment
1. Raw materials: methanol (CH3OH), silica powder (Si), hydrogen chloride (HCl)
2. Equipment: reaction kettle, condenser, fractionator, storage tank, pump, stirrer, etc.
II. Manufacturing steps
1. Add methanol and silica powder into reaction kettle according to a certain molar ratio, and stir well.
2. Pass in hydrogen chloride gas, control certain flow rate and reaction temperature, and carry out the reaction.
3. During the reaction, monomethyltrichlorosilane and water are generated, and the water and unreacted methanol are recovered through a condenser.
4. At the end of the reaction, the reaction solution is fractionated to separate out the monomethyltrichlorosilane and other by-products.
5. The separated monomethyltrichlorosilane is refined to remove the impurities.
3. Reaction principle
The reaction principle of the manufacturing method is as follows:
CH3OH + Si + 3HCl → CH3SiCl3 + H2O
4. Precautions
1. Strictly control the quality and proportion of the raw materials to ensure the smooth progress of the reaction and the quality of the product.
2. Maintain proper stirring speed and reaction temperature during the reaction to avoid local overheating and generation of by-products.
3. Ensure the purity and yield of the product during fractionation to avoid waste and environmental pollution.
4. Pay attention to safety during operation, avoid leakage and contact with fire source.
V. Application Fields
As an important organosilicon compound, monomethyltrichlorosilane is widely used in the following fields:
1. Silicone Rubber: It is used for the preparation of high-temperature vulcanized silicone rubber, which has excellent heat-resistance, cold-resistance, oxidation-resistance, and electrical insulation properties.
2. Silicone Oil: Used in the preparation of various silicone oils with excellent heat resistance, oxidation resistance, shear resistance and low surface tension.
3. Coupling agent: Used to enhance the compatibility between inorganic fillers and organic resins and improve the performance of composite materials.
4. Surface treatment agent: Used for waterproof, oilproof and antifouling treatment of glass, ceramics, metal and other surfaces.
All in all, monomethyltrichlorosilane has a wide range of application prospects in the field of raw materials for chemical production, and by mastering its manufacturing method, it can provide strong support for the development of related fields.
