Provided is a method of producing a silicon compound material, including the steps of: storing a silicon carbide preform in a reaction furnace; supplying a raw material gas containing methyltrichlorosilane to the reaction furnace to infiltrate the preform with silicon carbide; and controlling and reducing a temperature of a gas discharged from the reaction furnace at a predetermined rate to subject the gas to continuous thermal history, to thereby decrease generation of a liquid or solid by-product derived from the gas.

A process can be used for the preparation of tris(trichlorosilyl)dichlorogallylgermane, which is a chlorinated, uncharged substance.

In the hydrochlorination reaction, silicon tetrachloride (STC), metallurgical silicon, and hydrogen are converted to trichlorosilane (TCS) at about 540° C. Previously, a pilot-scale reactor was used to study the yield of TCS produced by the hydrochlorination reaction. The yield observed by experimentation compared favorably with a scalable mathematical model developed to predict the rate of TCS conversion. The model predicted that 90% of the final amount of TCS produced was achieved after the reactant gas traveled a quarter of the vertical distance in the reaction section of the reactor. The pilot-scale reactor was shortened to verify the model predictions. In addition, some catalytic effects on the reaction were studied.

According to one embodiment, a determination method is provided. The determination method determines progress of a treatment of a side-product produced in a process of reacting a substance containing a halogen and silicon or reacting a substance containing silicon and a substance containing a halogen. The treatment of the side-product includes bringing the side-product into contact with a treatment fluid containing water to obtain a first solid matter. The determination method includes determining the progress of the treatment of the side-product based on a signal according to a chemical analysis of at least one of an Si-α bond (α is at least one selected from the group consisting of F, Cl, Br, and I) and an Si—H bond, of the first solid matter.

According to one embodiment, a determination method is provided. The determination method determines progress of a treatment of a side-product produced in a process of reacting a substance containing a halogen and silicon or reacting a substance containing silicon and a substance containing a halogen. The treatment of the side-product includes bringing the side-product into contact with a treatment fluid containing water to obtain a first solid matter. The determination method includes determining the progress of the treatment of the side-product based on a signal according to a chemical analysis of at least one of an Si-α bond (α is at least one selected from the group consisting of F, Cl, Br, and I) and an Si—H bond, of the first solid matter.

A novel process provides for the preparation of the chlorinated, uncharged substance tetrakis(trichlorosilyl)germane, and for the use thereof.

The purpose of the present invention is to produce a high quality hydrogenated polysilane compound by reducing process troubles using the halosilane raw material and the reducing agent.

A method for producing a hydrogenated polysilane compound (CX) of the present invention contains a reducing step (P1) in which a halosilane raw material (C0) selected from a polyhalosilane compound (C1) comprising a Si—Si bond and a Si—X bond (X represents a halogen atom) in the same molecule, a salt of the polyhalosilane compound (C2), and a complex of the polyhalosilane compound (C3) is contacted with a reducing agent (R2) to reduce the halosilane raw material (C0), and a removing step in which a reaction solution of the reducing step (P1) is subjected to one or more steps selected from the following (T1) to (T4) to remove the reducing agent (R2) and/or a resulting material of the reducing agent (R2) contained in the reaction solution. (T1) separating step of a solid and a liquid (T2) separating step of one liquid and another comprising a reaction solution, a concentrated solution of the reaction solution, or a washing solution of the reaction solution or the concentrated solution of the reaction solution (T3) contacting step with an acid aqueous solution (T4) distilling step of the hydrogenated polysilane compound (CX)

The present disclosure discloses a method for graded utilization of fluorine and silicon resources in a phosphate ore. While the phosphate ore reacts with sulfuric acid, a fluorine-containing and silicon-containing tail gas is produced. SiO.sub.2 and H.sub.2SiF.sub.6 solution with a high concentration are obtained by concentrating and filtering a solution containing HF and H.sub.2SiF.sub.6 formed after tail gas is absorbed by water. Crude SiF.sub.4 and a solution containing HF and H.sub.2SO.sub.4 are obtained by extracting, adsorbing, and dehydrating the H.sub.2SiF.sub.6 solution. SiF.sub.4 with a 5N purity is obtained after the crude SiF.sub.4 is adsorbed and distilled, at the same time, an impurity-enriched SiF.sub.4 is returned to operations of concentration and filtration to react with the solution containing HF and H.sub.2SiF.sub.6 to generate the H.sub.2SiF.sub.6 and SiO.sub.2. High-purity HF and waste sulfuric acid are obtained after the H.sub.2SO.sub.4 solution containing HF is separated by steam stripping and distillation.

A method is useful for preparing partially hydrogenated chlorosilanes by selective hydrogenation with a compound of the formula R.sub.2AlH, wherein R is a branched or cyclic hydrocarbon. Partially hydrogenated chlorosilanes can be prepared with said method, in particular partially hydrogenated chlorosilanes represented by the formula Cl.sub.3SiSi(SiH.sub.3).sub.3, (Cl.sub.3Si).sub.2Si(SiH.sub.3).sub.2 or HSi(SiH.sub.3).sub.2SiCl.sub.3.

A method of preparing pentachlorodisilane is disclosed. The method comprises partially reducing hexachlorodisilane with a metal hydride compound to give a reaction product comprising pentachlorodisilane. The method further comprises purifying the reaction product to give a purified reaction product comprising the pentachlorodisilane. The purified reaction product comprising pentachlorodisilane formed in accordance with the method is also disclosed.