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| Number | Title | Issue Date |
| 8030510 | Process for the direct synthesis of alkylhalosilanes Process for preparing alkylhalosilanes are provided. The process involve reacting an alkyl halide with a solid body formed of silicon and a catalytic system. ... | 10/04/2011 |
| 7626050 | Direct method for synthesising alkylhalogenosilanes Process for the preparation of alkylhalosilanes by reaction of an alkyl halide, preferably CH3Cl, with a solid body, referred to as contact body, formed of silicon and of a catalytic system comprising (α) a copper catalyst and (β) a group of promoting a... | 12/01/2009 |
| 7521574 | Making of contact mass for organohalosilane preparation and preparation of organohalosilanes Organohalosilanes are prepared by charging a reactor with a contact mass comprising metallic silicon and a catalyst and feeding an organohalide-containing gas to the reactor. The contact mass is prepared by premixing metallic silicon and a tin compound and heat trea... | 04/21/2009 |
| 7429672 | Process for the direct synthesis of trialkoxysilane This invention discloses a process to improve reaction stability in the Direct Synthesis of trialkoxysilanes. The process is particularly effective in the Direct Synthesis of triethoxysilane and its higher alkyl cognates providing improved triethoxysilane yields. | 09/30/2008 |
| 7420075 | Preparation of organohalosilanes Organohalosilanes are prepared by charging a reactor with a contact mass of metallic silicon and a catalyst and feeding an organohalide-containing gas to the reactor. Tin or a tin compound is used as the catalyst. Then organohalosilanes can be produced quite efficie... | 09/02/2008 |
| 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 |
| 7279590 | Preparation of organohalosilanes Organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst. A contact mass composed of metallic silicon and copper catalyst contains an effective amount of a catalyst powder obtained by mechanical ... | 10/09/2007 |
| 7265235 | Method for producing halosilanes by impinging microwave energy Silanes containing halogen which is bound to silicon are prepared using microwave energy. Silicon is reacted with mixtures of elements or compounds selected from the group consisting of halogen or halogen and organohalogen compounds or halogen and hydrogen or haloge... | 09/04/2007 |
| 7238638 | Composite copper/tin/alkali metal catalysts for the direct synthesis of alkylhalosilanes The alkylhalosilanes are directly synthesized while diminishing the formation of coke by reacting an alkyl halide with silicon in the presence of a catalytically effective amount of (α) a copper metal or a copper-based compound catalyst and (β) a catalyst promoter... | 07/03/2007 |
| 7211683 | Process for preparing organosilanes The invention relates to a process for preparing organosilanes of the general formula 1 R3Si—R′,  (1) in which hydrosilanes of the general formula 2 R3Si—H  (2) are reacted with halohydrocar... | 05/01/2007 |
| 7205426 | Process for preparing methylchlorosilanes A process for the direct synthesis of methylchlorosilanes by reaction of chloromethane with a contact composition comprising silicon, copper catalyst and from 10 to 90 ppm of strontium leads to increased selectivity and higher production rate. ... | 04/17/2007 |
| 7205258 | 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... | 04/17/2007 |
| 7202192 | Composite catalysts for the direct synthesis of alkylhalosilanes The alkylhalosilanes are directly synthesized by reacting an alkyl halide with silicon in the presence of a catalytically effective amount of (α) a copper metal or a copper-based compound catalyst and (β) a catalyst promoter intermixture therefor which comprises a... | 04/10/2007 |
| 7195011 | Convertible fluid feed system with comformable reservoir and methods A feed system for an aerosolizer utilizes an ampoule containing a liquid and includes a housing having an ampoule region into which the ampoule is held, and a liquid receiving region that is adapted to receive liquid dispensed from the ampoule. An interface is used ... | 03/27/2007 |
| 7179933 | Preparation of organohalosilanes Organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst. A contact mass composed of the metallic silicon and the copper catalyst contains an effective amount of a catalyst alloy containing 0.2â€... | 02/20/2007 |
| 7153991 | Rochow-Müller direct synthesis using nanosized copper catalyst precursors A Direct Synthesis of making organohalosilanes with greater selectivity to the dialkyldihalosilane is disclosed herein. By using nanosized copper catalyst precursors, and preferably nanosized promoters as well, D/T values of greater than 10, and preferably greater t... | 12/26/2006 |
| 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 |
| 7100600 | Fluid filled ampoules and methods for their use in aerosolizers A fluid filled ampoule comprises an ampoule body having a top end, a bottom end and a sealed interior containing a liquid. A top tab is coupled to the top end and is removable to create a drain vent in the top end. A bottom tab is coupled to the bottom end and is re... | 09/05/2006 |
| 7032590 | Fluid filled ampoules and methods for their use in aerosolizers A fluid filled ampoule comprises an ampoule body having a top end, a bottom end and a sealed interior containing a liquid. A top tab is coupled to the top end and is removable to create a drain vent in the top end. A bottom tab is coupled to the bottom end and is re... | 04/25/2006 |
| 7018447 | Method of cleaning a rotary concentrator A method of cleaning the adsorbent media of a rotary concentrator in-situ while maintaining operation of the concentrator, including directing washing liquid into the sectors in the desorb plenum, then rotating the sectors one full revolution plus at least one secto... | 03/28/2006 |
| 6984748 | Co-catalyst and process for the preparation of organohalosilanes In a Rochow process, organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and a co-catalyst. The invention uses as the co-catalyst a powder of co-catalyst active element-copper alloy containi... | 01/10/2006 |
| 6948491 | Convertible fluid feed system with comformable reservoir and methods A feed system for an aerosolizer utilizes an ampoule containing a liquid and includes a housing having an ampoule region into which the ampoule is held, and a liquid receiving region that is adapted to receive liquid dispensed from the ampoule. An interface is used ... | 09/27/2005 |
| 6911552 | Preparation method of alkyldichlorosilanes A method for preparing alkyldichlorosilanes having a Si—H bond by directly reacting metallic silicon with a mixture of alkyl chloride and (i) hydrogen chloride, or (ii) an alkyl chloride which can generate hydrogen chloride at a reaction temperature in the presenc... | 06/28/2005 |
| 6894181 | Preparation of organohalosilanes In an industrial process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phos... | 05/17/2005 |
| 6768018 | Preparation of organohalosilanes When oganohalosilanes are prepared by charging a reactor with a contact mass containing metallic silicon and a copper catalyst, and introducing an organohalide-containing gas feed into the reactor, the partial pressure of organohalide gas in the gas feed is manipula... | 07/27/2004 |
| 6727376 | Preparation of organohalosilanes In an industrial process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phos... | 04/27/2004 |
| 6717004 | Method for making alkylhalosilanes A method for making alkylhalosilanes is provided comprising reacting an alkyl halide and silicon in the presence of a copper catalyst comprising copper powder, particulated copper, copper flake, or combinations thereof and at least one co-catalyst. ... | 04/06/2004 |
| 6686312 | Metallic copper catalyst and process for making organohalosilanes In the synthesis of organohalosilanes by the direct process of reacting an organic halogen with metallic silicon powder, a metallic copper catalyst in the form of a thermally active metallic copper powder having large strain energy is used.... | 02/03/2004 |
| 6528674 | Method for preparing a contact mass A method for making an alkylhalosilane is provided wherein the method comprises heat treating silicon and a form of copper at a temperature greater than about 500° C. to produce a contact mass and effecting reaction between an alkyl halide and silicon in... | 03/04/2003 |
| 6506923 | Preparation of organohalosilanes In a process for preparing oganohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains a minute, but effective amount ... | 01/14/2003 |
| 6465674 | Dust recirculation in the direct synthesis of chlorosilanes and methylchlorosilanes in a fluidized bed A continuous process for the direct synthesis of silanes of the formula 1 Ra SiCl4-a (1) involves reacting finely divided silicon metal with R--Cl in a fluidized bed, where R is hydrogen, methyl or ethyl and a is 0, 1, 2, 3 or 4, where a prod... | 10/15/2002 |
| 6433205 | Magnetic separation for silicon-containing materials Magnetic separators are used for treating silicon-containing materials from chlorosilane reactors to remove magnetically influenced components in the silicon-containing materials. The removal of such impurities allows for enhanced reactivity of the silico... | 08/13/2002 |
| 6425850 | Method for determining eta phase copper A proportion of Cu3 Si in a contact mass is determined by treating the mass with an inorganic ammonium salt, which selectively dissolves all forms of copper including free copper in deference to Cu3 Si, which is not dissolved. An ini... | 07/30/2002 |
| 6423860 | Method for promoting dialkyldihalosilane formation during direct method alkylhalosilane production Dialkyldihalosilane formation during direct method alkylhalosilane production is promoted by effecting reaction between alkyl halide and powdered silicon in the presence of a catalyst comprising copper, zinc, and aluminum and further comprising an amount ... | 07/23/2002 |
| 6407276 | Method for improving selectivity for dialkyldichlorosilane A method for forming a dialkyldichlorosilane, comprising reacting elemental silicon with an alkyl chloride using copper as a catalyst together with promoters zinc, tin, and a special promoter. The special promoter is silver, a silver compound, gold, a gol... | 06/18/2002 |
| 6395917 | Preparation of organohalosilanes When oganohalosilanes are prepared by charging a reactor with a contact mass containing a metallic silicon powder, a copper catalyst and a co-catalyst, and introducing an organohalide-containing gas into the reactor to effect the direct reaction, the cata... | 05/28/2002 |
| 6365766 | Metallic copper catalyst and process for the synthesis of organohalosilanes Organohalosilanes are prepared by reacting an organic halide with metallic silicon particles in the presence of a metallic copper catalyst which is a metallic copper powder in flake form having a bulk specific gravity of 1-3 g/cm3 and a mean pa... | 04/02/2002 |
| 6339167 | Process for preparing organohalosilanes Organohalosilanes are prepared by reacting metallic silicon with a halogenated hydrocarbon in the presence of a copper or copper compound catalyst and an activated aluminum, aluminum alloy or aluminum carbide promotor. The reaction is carried out at a tem... | 01/15/2002 |
| 6323357 | Process for the direct synthesis of organochlorosilanes using recovered CuCl catalyst A process for the direct synthesis of organochlorosilanes using CuCl prepared from the copper-containing residues from the direct synthesis of organochlorosilanes, where, in the preparation of the CuCl, in a first step, copper from an aqueous suspension o... | 11/27/2001 |
| 6288258 | Preparation of organohalosilanes When oganohalosilanes are prepared by charging a reactor with a contact mass containing metallic silicon and a copper catalyst and introducing an organohalide-containing gas into the reactor to effect the direct reaction, 50-10,000 ppm of bronze phosphide... | 09/11/2001 |
