Mitsubishi Materials Corporation

Nippon Aerosil Co., Ltd.

Eiji Komai

Toshiyuki Ishii

Harumi Satoh

Hirokuni Shirono

Naruyasu Ishibashi

Masamichi Murota

Takeyoshi Shibasaki

Akira Inoue

Ralph M Brandes

An apparatusfor manufacturing trichlorosilane includes a decomposition furnaceinto which polymers and hydrogen chloride are introduced, the decomposition furnaceincludes: a heating devicewhich heats an interior of the decomposition furnace; a reaction chamberwhich is formed in the decomposition furnace; a center tubewhich is inserted in the reaction chamberalong a longitudinal direction of the reaction chamber and has a lower-end opening portion; raw-material-supply pipesandwhich supplies the polymer and the hydrogen chloride to the reaction chamberat an exterior of the center tube; and a gas-discharge pipewhich leads out reacted gas from the center tube, the apparatusfurther includes a finthat leads the polymer and the hydrogen chloride to the lower-end opening portionof the center tubeso as to stir the polymer and the hydrogen chloride.

Method and apparatus for manufacturing trichlorosilane

An apparatus for producing trichlorosilane includes: a decomposing furnace, a heating unit heating the inside of the decomposing furnace, a raw material supplying tube for guiding polymer and hydrogen chloride to be guided to the inner bottom portion of the decomposing furnace, and a gas discharge tube for discharging reaction gas from the top of the reaction chamber provided between the outer peripheral surface of the raw material supplying tube and the inner peripheral surface of the decomposing furnace, a fin, which guides a fluid mixture of the polymer and the hydrogen chloride supplied from the lower end opening of the raw material supplying tube to be agitated and rise upward in the reaction chamber, and is formed integrally with at least one of the outer peripheral surface of the raw material supplying tube and the inner peripheral surface of the decomposing furnace.

Apparatus for producing trichlorosilane and method for producing trichlorosilane

Firstly, a powder matrix is kept in a fluent state, said powder matrix consisting of a first oxide having an absorbed water amount of 0.1 to 50%, an averaged particle diameter of 0.005 to 0.5 &mgr;m and a surface hydroxyl group number of 0.1 to 25 &mgr;mol/m . Then, one or both of a halide and an alkoxide including metal or semi-metal identical with or different from the metal or semi-metal constituting said first oxide is allowed to contact with said powder matrix kept in the fluent state, by means of an inert carrier gas, and then they are heated at a temperature of from 25 to 800&deg; C., to thereby coat said powder matrix by a coating layer consisting of a second oxide. Further, a reaction by-product consisting of one or both of a hydrogen halide or an alcohol generated by said contacting is heated at a temperature of from 200 to 1000&deg; C. within the inert carrier gas to thereby eliminate the reaction by-product.

Oxide powder and method for preparing the same, and product using the same

The tribo-electro static charge is stabilized by treating the surface of the metallic-oxide fine powders such as a silica powder, using the mixed solution which consists of a specific silane coupling agent containing primary amino group, other silane coupling agent containing amino group and the hydrophobic agent The powder such as silica has the small charge variation with time, and is suitable as the additive of the powder coatings or the electrophotographic toner.

Surface-treated metallic-oxide fine powder, and its production and use

A fine powder of hydrophobic titanium oxide, which, when added to toner powder, gives it high flowability and good electrification stability. The titanium oxide is prepared by hydrolyzing a volatile titanium compound while in a high-temperature vapor-phase condition, in the presence of a combustible or incombustible gas, and has a BET specific surface area of from 55 to 150 m,/g and an anatase/rutile crystal structure with a ratio of anatase falling between 0.3 and 0.98. It is processed for surface modification with a silane coupling agent and/or a silicone compound to produce a fine powder of hydrophobic titanium oxide.

Fine powder of hydrophobic titanium oxide, and method for producing it

A fine powder of a hydrophobic metal oxide is provided which is produced through surface treatment of fine powder of a metal oxide with an epoxy compound and an alkylsilazane or ammonia thereby ring-opening the epoxy groups in the surface of the fine powder followed by introducing an amino group and an alkylsilyl group, or an amino group into the ring-opened epoxy groups. The fine hydrophobic metal oxide powder has good dispersability, flowability and electrification properties, and has good time-dependent stability. A toner composition for electrophotography that contains the fine hydrophobic metal oxide powder has stable and good imaging capabilities for a long period of time. Also provided is a method for modifying the surface of the fine metal oxide powder with a surface modifier, in which ammonia is introduced into the reaction system prior to the treatment of the fine powder with the surface modifier.

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Yokkaichi, Japan

Eiji Komai