Patents in Class 556/472

Matches 1 - 50 out of 122

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Match	Document	Document Title
1	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.
2	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...
3	7569716	Method of selecting silicon having improved performance Chemical grade silicon metalloid having improved performance in the direct process for making organohalosilanes is selected by (A) measuring the temperature of each batch of silicon metalloid...
4	7550620	Process for preparing methylchlorosilanes The invention relates to a process for the direct synthesis of methylchlorosilanes by reaction of chloromethane with a contact composition comprising silicon and copper catalyst, wherein the...
5	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...
6	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...
7	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...
8	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...
9	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...
10	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...
11	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 ...
12	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 ...
13	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...
14	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 ...
15	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...
16	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 c...
17	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...
18	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,...
19	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...
20	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...
21	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 ...
22	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 RaSiCl4−a (1)involves reacting finely divided silicon metal with R—Cl in a fluidized bed, whereR is hydrogen, methyl or eth...
23	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...
24	6425850	Method for determining eta phase copper A proportion of Cu3Si 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...
25	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...
26	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...
27	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...
28	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...
29	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...
30	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...
31	6258970	Method for promoting dialkyldihalosilane formation during direct method alkylhalosilane production A method is described for enhancing the formation of alkylhalosilane during the direct method reaction between powdered silicon and a catalyst comprising copper, zinc, tin, and phosphorus. An...
32	6252102	Process for the preparation of methylchlorosilanes In the process for the direct synthesis of methylchlorosilanes from chloromethane and silicon in the presence of a copper catalyst and promoter, the reaction mixture comprising chloromethane,...
33	6211394	Process for the preparation of organochlorosilanes The invention relates to a continuous process for the direct synthesis of methylchlorosilanes by reacting chloromethane with a catalyst composition comprising silicon, zinc promoter and copper...
34	6169195	Process for the removal of chlorohydrocarbons from organochlorosilanes The invention relates to a process for cleavage of chlorohydrocarbons which are present as an impurity in organochlorosilanes, in which the chlorohydrocarbons are brought into contact with steel...
35	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 ...
36	6057469	Process for manufacturing active silicon powder for the preparation of alkyl- or aryl-halosilanes A process for the preparation of active silicon powder for use in the Rochow reaction consisting of grinding metallurgical silicon to a particle size less than 350 μm in the presence of at least ...
37	6025513	Preparation of alkylhalosilanes An alkylhalosilane is prepared by charging a reactor with a contact mass comprising a metallic silicon powder and a copper catalyst, and feeding an alkyl halide into the reactor whereby the silane...
38	5986123	Preparation of alkylhalosilanes An alkylhalosilane is prepared by charging a reactor with a contact mass comprising a metallic silicon powder and a copper catalyst, and feeding an alkyl halide into the reactor whereby the silane...
39	5973177	Method for selecting silicon metalloid having improved performance in the direct process for making organohalosilanes A method for selecting chemical grade silicon metalloid having improved performance in a direct process for making organohalosilanes. The method comprises (A) heating a chemical grade silicon...
40	5880307	Process for the preparation of alkylhalosilanes A process for the use of water granulated silicon in the preparation of alkylhalosilanes. The process comprises contacting an alkyl halide described by formula RX, with a particulate water...
41	5876609	Process for treating methylchlorosilanes by-products The instant invention relates to a novel process for the hydrolysis of the by-products produced during the manufacture of methyldichlorosilanes comprising combining the by-products with an aqueous...
42	5877337	Process for preparing alkylchlorosilanes from the residues of direct synthesis of alkylchlorosilanes Alkylchlorosilanes are prepared continuously from the residue of direct synthesis of alkylchlorosilanes containing liquid constituents with a boiling point of at least 70° C. at 1013 hPa and solid ...
43	5874604	Process for preparing alkyl halosilanes The present invention relates to a process for preparing alkyl halosilanes by reacting a contact material which comprises, in addition to silicon, at least one copper-containing compound as...
44	5817855	Copper-based catalysts, processes for their production and their use and a process for the production of alkyl halosilanes The invention relates to copper-based catalysts, processes for their production and their use and to a process for the production of alkyl halosilanes in the presence of said catalysts.
45	5783721	Preparation of silanes An (alkylhalo)silane is prepared by charging a reactor with a contact mass comprising metallic silicon powder and a copper catalyst and feeding a gas containing an alkyl halide into the reactor...
46	5777146	Process for preparing methylchlorosilanes In a process for the direct synthesis of methylchlorosilanes by reacting methyl chloride with a catalytic composition comprising silicon, copper catalyst and promoters, where at least some of the...
47	5756794	Process for producing alkylhalogenosilanes The process for producing alkylhalogenosilanes, which comprises reacting a physical mixture of silicon, a selenium or tellurium promoter and a copper catalyst with an alkyl halide.
48	5714131	Metallurgical silicon containing phosphorus for the preparation of organohalogenosilanes A metallurgical silicon is disclosed which contains substantially from 30 to 180 ppm of phosphorus comprised of a crystalline phase of primary silicon having a dissolved phosphorus content between...
49	5712405	Preparation of silanes An (alkylhalo)silane is prepared by using a fluidized bed reactor equipped with a feed line for reactant gas and a delivery line for product gas, charging the reactor with a contact mass comprising...
50	5679823	Method of producing alkyl halogen silanes A method of producing alkyl halogen silanes, more particularly methyl chlorosilanes, by reacting silicon with an alkyl halide in the presence of at least one catalyst and easily volatile or gaseous...

Matches 1 - 50 out of 122

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