Silicon Tetrachloride For Sale-manufacture,factory,supplier from China

In silicon tetrachloride purification, boron is the most difficult impurity to remove. Researchers have proposed compound method to remove boron from silicon tetrachloride, which has achieved satisfactory results and has been widely used in industrial production.

The main by-product of trichlorosilane, silicon tetrachloride, is also the main raw material for the manufacture of silicone, its finished products are silicone ester, silicone oil, high temperature insulating paint, silicone resin, silicone rubber and heat resistant cushion lining materials. High purity silicon tetrachloride is also an important raw material for manufacturing high purity silicon dioxide, inorganic silicon compounds, quartz fibers and optical fibers.

In recent years, China's polysilicon production has shown geometric development, but the disposal of polysilicon by-product silicon tetrachloride has become a difficult to step over the development of polysilicon industry "sill", let the silicon industry wear the hat of high pollution.

The basic principle of solid adsorption is adsorption separation based on the different polarity of chemical bonds of each component in a compound. Silicon tetrachloride is a symmetric molecule with no dipole moment. In contrast, the contained impurities such as BCl3, AlCl3, FeCl3, PCl3, etc. are asymmetric molecules with considerable dipole moments, which strongly tend to form additive chemical bonds and are easily adsorbed by the adsorbent.

Silicon tetrachloride is an important chemical raw material, it is widely used to produce high-purity silicon, silane, silicone ester, silicone oil, silica gel and other products, widely used in ink, paint, resin, rubber, medicine, grease and other fields; Silicon tetrachloride can also be used to manufacture optical fiber, polysilicon, silicon dioxide, etc., in communications, photovoltaic power generation, optical instruments and other fields of application; In addition, silicon tetrachloride can also be used in the military field, metallurgy, casting and other fields.

Silicon tetrachloride is mainly used in the manufacture of silicone esters, gaseous silica, silicone monomer, silicone oil, high temperature insulating paint, silicone resin, silicone rubber and so on. High-purity silicon tetrachloride is the main raw material for manufacturing fiber prefabricated rod, and the quality of fiber prefabricated rod directly determines the fiber performance. Therefore, high-purity silicon tetrachloride is the core raw material of fiber industry.

Silicon tetrachloride which chemical formula is SiCl4 is an inorganic compound, because silicon chloride only exists in the form of SiCl4, silicon tetrachloride is also directly called silicon chloride. The appearance of this product is light yellow liquid, and the appearance of high-purity silicon tetrachloride is colorless and transparent liquid, volatile, with special odor, toxicity and corrosion. Silicon tetrachloride can be miscible with benzene, chloroform, ether, carbon tetrachloride and other organic solvents. It can be hydrolyzed in humid air and react violently with water.

SiCl4 is one of the most important inorganic silicon compounds, is a colorless, transparent, flowing smoke liquid, with suffocating odor, soluble in benzene, ether, chloroform and other most organic solvents. Silicon tetrachloride is a volatile liquid with strong asphyxiating odor. It can be used as raw materials for the production of gaseous silica, high purity silicon and organosilicide. The upstream of the silicon tetrachloride industry chain is the raw material market, mainly silicon powder, ferrosilicon, hydrogen chloride, etc.

Distillation is the use of SiCl4, and the difference between the relative volatility of impurities components, through several partial gasification and partial condensation process, to achieve the separation of mixed liquid, so as to obtain high purity silicon tetrachloride products.

High temperature hydrogenation of silicon tetrachloride is an important method to treat silicon tetrachloride as a by-product of polysilicon. High temperature hydrogenation is silicon tetrachloride and hydrogen as raw materials, heated by 1200 ~ 1250℃ graphite heater, thermal reduction reaction to produce  trichlorosilane. The advantages of the process are that the whole system is closed circulation, suitable for continuous and stable operation; Trichlorosilane products of high purity, need to distillation links less.

Chlorine hydrogenation technology is to add HCl on the basis of low temperature hydrogenation technology to further reduce the reaction temperature and increase the yield of trichlorosilane. Chlorine hydrogenation reaction principle is as follows: 2SiCl4(g)+H2(g)+HCl(g)+Si(s)=3SiHCl3(g). Hydrogen plasma is generated by hydrogen discharge, which is passed into the reactor to react with silicon tetrachloride gas. Since hydrogen is dissociated into hydrogen atoms, the reactivity is greatly increased and it can easily react with silicon tetrachloride to form trichlorosilane.

Silicon tetrachloride is an important raw material and intermediate product in the process of organic silicon synthesis and polysilicon production. Under different environmental conditions, silicon tetrachloride can react with a variety of substances to produce new substances.

The method of species co-production of cyclohexylamine and dicyclohexylamine and the catalyst system used for the method. The method includes the following steps :(1) the raw material aniline, cyclohexanone, ammonia, hydrogen after the loading load RhNi catalyst first section reactor, the first reaction liquid.(2) The reaction solution containing cyclohexylamine and dicyclohexylamine was obtained through the second stage reactor loaded with RhCo catalyst.

The invention uses nitro-benzene and hydrogen as raw materials. Adding solvent, nitro-benzene and catalyst into the reaction kettle, controlling the reaction pressure of 0.5 ~ 4MPa, reaction temperature of 60 ~ 160℃, reaction for 2 ~ 8h, cyclohexylamine and dicyclohexylamine are obtained, and the catalyst used is Pd/CNTs catalyst or PD-Ni /CNTs catalyst. 

Trichlorosilane is mainly used in the manufacture of polysilicon and silane coupling agents, among which polysilicon is the most important downstream application area of trichlorosilane, accounting for 32% of the consumption in 2021, and silane coupling agent consumption accounted for 25%. The market is still in good condition.

With the rapid growth of downstream PV demand, photovoltaic grade trichlorosilane continues to be in short supply. The application of PV grade trichlorosilane in the production of polysilicon includes a one-time requirement for the first commissioning, which accounts for about 20% of the total capacity. Second, the requirement for chlorine supplementation during continuous production accounts for about 10 to 30 percent of total production. On the supply side, the expansion of trichlorosilane production has been conservative in the past.

The invention relates to a method for the synthesis of N-chlorinated dicyclohexylamine with low concentration of sodium hypochlorite. The mass of dicyclohexylamine is weighed, and the amount of sodium hypochlorite of low concentration required for the reaction is calculated according to the molar ratio of dicyclohexylamine and sodium hypochlorite =1:1.051.20. Put dicyclohexylamine into the reactor, and keep the reactor temperature.

At present, there are two main synthesis methods of trichlorosilane: one is the traditional synthesis method, that is the silicon chloride method. The other is hydrolyzation of tetrachloride. At present, the mainstream method of polysilicon production is the modified Siemens method, using trichlorosilane reduction method. In recent years, with the continuous decline of polysilicon price, polysilicon production enterprises pay more and more attention to the control of production cost.

The invention relates to a tail gas refining method, especially a method for hydrogenation of aniline to produce dicyclohexylamine tail gas deamination and hydrogen refining, which belongs to the technical field of chemical industry.

Cyclohexylamine, an organic compound with the chemical components of c6h13n, is a drab to yellow liquid, soluble in water and miscible in most organic solvents. It is mainly used as a solvent, and can also be used to prepare desulfurizer, rubber antioxidant, vulcanization accelerator (CZ), cyclamate, medical raw materials, chemical additives for plastics and textiles, boiler feed water treatment agent, metal corrosion inhibitor, emulsifier, preservative, antistatic agent and latex coagulant. 

Since May 2022, trichlorosilane has been sustained upward by the downward trend in silicon metal prices.

The principle is to reduce high purity trichlorosilane with high purity hydrogen on the high purity silicon core at about 1100℃ to generate polycrystalline silicon deposited on the silicon core. On the basis of the traditional Siemens process, the improved Siemens process is equipped with a supporting process of energy saving, consumption reduction, recycling and utilization of a large amount of H2, HCI, SiCI4 and other by-products and a large amount of by-production heat energy.

Cyclohexylamine, an organic compound with the chemical formula of C6H13N, is a colorless to yellow liquid, soluble in water and miscible in most organic solvents. UsageIt is mainly used as solvent, and can also be used to prepare desulfurizer, rubber antioxidant, vulcanization accelerator, chemical additives for plastics and textiles, boiler feed water treatment agent, metal corrosion inhibitor, emulsifier, preservative, antistatic agent, latex coagulant, petroleum additive, bactericide, insecticide and dye intermediate.SpecificationProjectItemBest gradeFirst grade    

Silane coupling agent product price growth is very obvious, compared with the same period last year growth of 118%. Upstream raw material trichlorosilane price rise, silane products for the high price operation provides a strong support. Reporters learned that trichlorosilane is mainly used in the production of polysilicon, silane coupling agent, silane coupling agent is the second largest downstream market of trichlorosilane, in recent years the demand is more exuberant.