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| Number | Title | Issue Date |
| 8168152 | Method for producing trichlorosilane and method for utilizing trichlorosilane The present invention relates to a method for producing trichlorosilane. In this method for producing trichlorosilane, first, silicon tetrachloride and hydrogen are subjected to a conversion reaction at a temperature of equal to or higher than 1000° C. and equal to... | 05/01/2012 |
| 8043591 | Process for preparing trichloromonosilane A process for preparing trichloromonosilane, in which silicon particles are reacted with hydrogen chloride in a fluidized bed reactor, wherein the silicon particles used are a silicon dust which is obtained as a waste product in the preparation of defined silicon pa... | 10/25/2011 |
| 7790132 | Method for producing trichlorosilane and method for producing polycrystalline silicon The present invention includes a step of separating an effluent produced in a hydrogenation step of making tetrachlorosilane (STC) react with hydrogen into trichlorosilane (TCS), into a chlorosilane fraction containing a hydrocarbon and a TCS fraction, and a chlorin... | 09/07/2010 |
| 7740822 | Method for purification of disilicon hexachloride and high purity disilicon hexachloride The objective of the present invention is to provide a method for obtaining a high purity disilicon hexachloride by removing a silanol with good efficiency from a disilicon hexachloride material containing the silanol as an impurity. The purification method for disi... | 06/22/2010 |
| 7736614 | Process for removing aluminum and other metal chlorides from chlorosilanes A process for removing aluminum and other metal chlorides from liquid chlorosilanes with the steps of: introducing a source of seed into a source of impure liquid chlorosilanes, initiating the crystallization of aluminum and other metal chlorides on the seed from th... | 06/15/2010 |
| 7691356 | Method for producing trichlorosilane A by-product mixture produced in a process for producing polycrystalline silicon is made to react with chlorine to form tetrachlorosilane (STC) distillate in a chlorination reaction vessel, and the tetrachlorosilane (STC) distillate is made to react with hydrogen in... | 04/06/2010 |
| 7462341 | Method for production of trichlorosilane and silicon for use in the production of trichlorosilane The present invention relates to a method for the production of trichlorosilane by reaction of silicon with HCl gas at a temperature between 250 and 1100° C., and an absolute pressure of 0.5-30 atm in a fluidized bed reactor, in a stirred bed reactor or a solid bed... | 12/09/2008 |
| 7323583 | Catalysts for the production of methylchlorosilanes using zinc oxide promoters The present invention provides a catalyst that may be used to facilitate the formation of dimethylchlorosilanes. A catalyst in which copper oxide and zinc oxide are in intimate contact and form agglomerated particles allows for the increased selectively of the produ... | 01/29/2008 |
| 7323155 | Method for producing silanes The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper... | 01/29/2008 |
| 7282738 | Fabrication of crystalline materials over substrates A method of forming crystalline or polycrystalline layers includes providing a substrate and a patterning over the substrate. The method also includes providing nucleation material and forming the crystalline layer over the nucleation material. The crystalline mater... | 10/16/2007 |
| 7273588 | Methods of sampling halosilanes for metal analytes Methods for determining the amount of at least one metal analyte present in a liquid or gas sample of a halosilane supply (e.g., a chlorosilane supply) are disclosed herein. A sample of a halosilane supply is contacted and reacted with an aqueous hydrofluoric acid s... | 09/25/2007 |
| 7238122 | Ormocer composites for golf ball components A golf ball comprising a core; a cover layer; and a barrier layer disposed between the core and the cover layer, the barrier layer being formed from a composition comprising an organically-modified ceramic material (also referred to as ormocers, ceramers, ormosils, ... | 07/03/2007 |
| 7204963 | Process for the separation of chlorosilanes from gas streams Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase. ... | 04/17/2007 |
| 7177168 | Power converting apparatus and power generating apparatus AC module makers must prepare two types of AC modules for the 100-V and 200-V outputs only for domestic supply. For foreign countries, the makers must manufacture AC modules compatible with more system voltages. To solve these problems, the control circuit of an AC ... | 02/13/2007 |
| 7108734 | Silicon powder for preparing alkyl- or aryl-halogenosilanes The invention concerns a silicon powder for making alkyl- or aryl-halogenosilanes, with particle-size distribution less than 350 μm, and containing less than 3% and preferably less than 2% of particles having a size less than 5 μm. Said powder enables to improve e... | 09/19/2006 |
| 7090809 | Production of aluminum compounds and silica from ores A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from in... | 08/15/2006 |
| 7074377 | Production of tetrafluorosilane Tetrafluorosilane is produced by a process comprising a step (1) of heating a hexafluorosilicate, a step (2-1) of reacting a tetrafluorosilane gas containing hexafluorodisiloxane produced in the step (1) with a fluorine gas, a step (2-2) of reacting a tetrafluorosil... | 07/11/2006 |
| 7056484 | Method for producing trichlorosilane The invention relates to a method for producing trichlorosilane by reacting silicon with hydrogen, silicon tetrachloride and, optionally, hydrogen chloride, whereby the silicon is provided in comminuted form, and the silicon is mixed with a catalyst during comminuti... | 06/06/2006 |
| 7037965 | Golf balls comprising glass ionomers, ormocers, or other hybrid organic/inorganic compositions A golf ball comprising a core and a cover layer, wherein at least one of the core or cover layer comprises a hybrid material that contains fatty acid-modified glass ionomers, an ormocer or other inorganic-organic materials. ... | 05/02/2006 |
| 7033561 | Process for preparation of polycrystalline silicon A process for preparing polycrystalline silicon comprising the steps of (A) reacting trichlorosilane with hydrogen thereby forming silicon and an effluent mixture comprising tetrachlorosilane and disilane described by formula HnCl6—nSi2 where n is a value of 0 to ... | 04/25/2006 |
| 6921818 | Purification of oligomers Compositions and methods are disclosed which facilitate purification of oligomers and other compounds. The disclosed compositions are silyl compositions that can be directly coupled, or coupled through a linking group, to a compound of interest, preferably to an oli... | 07/26/2005 |
| 6905576 | Method and system for producing silane This invention relates to a continuous process for the preparation of silane by catalytic disproportionation of trichlorosilane in a reactive/distillative reaction zone having a catalyst bed of catalytically active solid. ... | 06/14/2005 |
| 6858195 | Process for forming a low dielectric constant fluorine and carbon-containing silicon oxide dielectric material The invention provides a process for forming a low k fluorine and carbon-containing silicon oxide dielectric material by reacting with an oxidizing agent one or more silanes that include one or more organofluoro silanes selected from: (a) an organofluoro silane cont... | 02/22/2005 |
| 6846473 | Process for producing hexachlorodisilane A process for producing hexachlorodisilane comprising, condensing an exhaust gas discharged from a reactor for producing polycrystalline silicon from a chlorosilane and hydrogen to separate the hydrogen, distilling the resultant condensate to separate the unreacted ... | 01/25/2005 |
| 6822020 | Tetrahalosilane blends for treating silica Modified silica fillers are prepared by contacting silica with blends or mixtures containing diorganodihalosilanes and tetrahalosilanes in weight ratios of 1:0.1 to 1:2, respectively. While dialkyldichlorosilanes and tetrahalosilanes such as dimethyldichlorosilane a... | 11/23/2004 |
| 6770253 | Process for producing silicon tetrafluoride A process for producing silicon tetrafluoride includes reacting at 250° C. or higher elemental silicon with hydrogen fluoride, thereby producing a gas product containing silicon tetrafluoride. This reaction can be conducted such that the gas product contains at lea... | 08/03/2004 |
| 6680038 | Process for the separation of chlorosilanes from gas streams Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.... | 01/20/2004 |
| 6628016 | Molecular dipolar rotors Molecular dipolar rotors comprising a base, an axle connected to said base and oriented substantially perpendicular to said base, and a rotor portion having an electric dipole moment are provided. The molecular dipolar rotors may be attached to a surface.... | 09/30/2003 |
| 6602482 | Separation of metal chlorides from their suspensions in chlorosilanes A process for separating metal chlorides from a suspension of metal chlorides in chlorosilanes, in which the suspension is filtered under pressure in the absence of air and moisture forming a filter cake, which is granulated and passed to a dissolution zo... | 08/05/2003 |
| 6482381 | Method for hydrogenating halogen-substituted silicon compounds Halogen-substituted silicon compounds are hydrogenated by reaction with hydrogen in a chloroaluminate salt melt as a reaction medium containing a finely divided metal capable of forming interstitial hydrides which are suspended in the melt, the finely div... | 11/19/2002 |
| 6451277 | Method of improving the efficiency of a silicon purification process Methods for Heating a Fluidized Bed Silicon Deposition Apparatus with the steps of: one or more heaters and entries to the reactor for the gas or gases which can be heated without decomposition separate from one or more heaters and entries for the gas or ... | 09/17/2002 |
| 6399037 | Dental materials having a nanoscale filler A low-viscosity dental material contains a non-settling nanoscale filler. Improvements of the mechanical properties of the dental materials, including the abrasive resistance and the compressive strength are provided. Furthermore, the dental materials hav... | 06/04/2002 |
| 6375911 | Method and device for treating exhaust gas A process and an apparatus for treating an exhaust gas, in which a raw gas and high-boiling intermediate products contained in the exhaust gas let out from a CVD system employing a silicon-containing gas is brought into contact with a transition metal suc... | 04/23/2002 |
| 6372190 | Process for filling and emptying a vessel charged with flammable and aggressive gas The present invention relates to an apparatus for the safe filling and emptying of a pressurized vessel charged with flammable and/or aggressive gas. The apparatus features an upper flap combination, an intermediate lock vessel having a flushing apparatus... | 04/16/2002 |
| 6368568 | Method for improving the efficiency of a silicon purification process A Method for Improving the efficiency of a silicon purification process is by controlling the temperature and composition of the effluent to a feedstock recovery composition and temperature, rapidly quenching the effluent at or near the recovery compositi... | 04/09/2002 |
| 6342194 | NF3 treating process A process for treating NF3 useful as a dry etching gas and cleaning gas in processes for producing LSI, TFT, and solar cell and in an electron photographic processes. The treating process comprises following step: (a) preparing a reactor includ... | 01/29/2002 |
| 6291698 | Process for preparing vinyl chlorosilanes The invention relates to a process for preparing vinyl chlorosilanes, that includes thermally and non-catalytically reacting chlorosilane with vinyl chloride at a temperature of 550 to 700° C. by flowing the chlorosilane and vinyl chloride through a ring... | 09/18/2001 |
| 6217840 | Production of fumed silica A method for producing fumed silica and a fluorine-containing product from a source of silica in solid form and a solid material containing fluorine, the solid material selected from the group consisting of sodium aluminum tetrafluoride, cryolite, aluminu... | 04/17/2001 |
| 6123908 | Method of treating spent potliner material from aluminum reduction cells A process of treating spent potliner material from aluminum reduction cells and recovering useful products. In the process of the present invention, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. As a r... | 09/26/2000 |
| 6090966 | Preparation of contract mass for alkylhalosilane production and process for producing alkylhalosilanes Alkylhalosilanes are produced by first fluidizing a metallic silicon powder with an inert gas, preheating the silicon powder at a temperature between 200° C. and a steady reaction temperature while keeping the silicon powder fluidized, adding a copper ca... | 07/18/2000 |
