Abstract: A method comprises separate and consecutive steps (i) and (ii). Step (i) includes contacting a copper catalyst with hydrogen gas and a halogenated silane monomer at a temperature of 500° C. to 1400° C. to form a silicon-containing copper catalyst comprising at least 0.1% (w/w) of silicon. Step (ii) includes contacting the silicon-containing copper catalyst with an organohalide at a temperature of 100° C. to 600° C. to form a reaction product. The organohalide has formula HaCbXc, where X is a halogen atom, subscript a is an integer of 0 or more, subscript b is an integer of 1 or more, and subscript c is an integer of 2 or more. The method produces a reaction product. The reaction product includes a halogenated silahydrocarbylene.

Abstract: Provided are a coating composition for low refractive layer including fluorine-containing compound of the following Chemical Formula 1, an anti-reflection film using the same, and a polarizer and an image display device including the same, wherein the fluorine-containing compound of the following Chemical Formula 1 has a low refractive index of 1.28 to 1.40, thereby making it possible to easily adjust a refractive index of the anti-reflection film and be usefully used as a coating material of the anti-reflection film having an excellent mechanical property such as durability, or the like.

Abstract: The invention pertains to a process for the preparation of organohalosilanes. The process comprises contacting a first finely-divided silicon comprising from 0.08 to 0.25% (w/w) of aluminum with an organohalide in a reactor at a temperature of from 250 to 350° C. in the presence of a Direct Process catalyst comprising copper, and a promotor; and introducing a second finely-divided silicon into the reactor comprising from 0.001 to <0.10% (w/w) of aluminum into the reactor as needed in an amount sufficient to maintain an aluminum concentration of from 0.08 to 0.2% (w/w), based on a weight of unreacted silicon and aluminum.

Abstract: The present disclosure provides a method of preparing silylethynyl compounds in which two of the hydrocarbyl groups bonded to the silicon exclusive of the ethynyl group, are the same and one is different, that may be used in preparing novel silylethynyl functionalized acene semiconductor chromophores.

Abstract: The present disclosure provides a method of preparing silylethynyl compounds in which two of the hydrocarbyl groups bonded to the silicon exclusive of the ethynyl group, are the same and one is different, that may be used in preparing novel silylethynyl functionalized acene semiconductor chromophores.

Abstract: Silicon compounds containing Si—H groups are converted into silicon halides by reaction with hydrogen halide in the gas phase in the presence of a catalyst of gamma-alumina, which is also effective in dissociating hydrocarbons which may be present into lower boiling hydrocarbons.

Abstract: Silicon compounds having Si—H groups are converted into silicon compounds having Si—X groups by reaction with HX in the gas phase in the presence of a quaternary ammonium or phosphonium halide catalyst or an ionic chloride of a heterocycle organically substituted on the heteroatom.

Abstract: 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 concentration of oxygen in the chloromethane used is reduced by mixing a) chloromethane which contains oxygen, and b) chloromethane which contains a gaseous boron compound.

Abstract: 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 (?) a copper metal or a copper-based compound catalyst and (?) a catalyst promoter intermixture therefor which comprises an effective minor amount of an additive ?1 selected from the group consisting of tin, a tin-based compound and mixture thereof, optionally, an effective minor amount of an additive ?2 selected from the group consisting of zinc metal, a zinc-based compound and mixture thereof, an effective minor amount of an additive ?3 selected from the group consisting of cesium, potassium and rubidium, and compound and mixture thereof, and, optionally, an effective minor amount of an additive ?4 selected from the group consisting of the element phosphorus, a phosphorus-based compound and mixture thereof.

Abstract: The alkylhalosilanes are directly synthesized by reacting an alkyl halide with silicon in the presence of a catalytically effective amount of (?) a copper metal or a copper-based compound catalyst and (?) a catalyst promoter intermixture therefor which comprises an effective minor amount of an additive ?1 selected from the group consisting of tin, a tin-based compound and mixture thereof, an effective minor amount of an additive ?2 selected from the group consisting of cesium, potassium and rubidium, and compound and mixture thereof, and an effective minor amount of an additive ?3 selected from the group consisting of the element phosphorus, a phosphorus-based compound and mixture thereof.

Abstract: The invention concerns a silicon powder for making alkyl- or aryl-halogenosilanes, with particle-size distribution less than 350 ?m, and containing less than 3% and preferably less than 2% of particles having a size less than 5 ?m. Said powder enables to improve efficiency of synthesis reaction.

Abstract: The invention provides a continuous process for preparing alkylchlorosilanes from the residues of direct synthesis of alkylchlorosilanes which comprise liquid constituents with a boiling point of at least 70° C. at 1013 hPa and may also contain solids, with hydrogen chloride, by passing the residues at a temperature not above 200° C. and hydrogen chloride at a temperature higher than the latter into a reactor so that the resultant reaction temperature is from 400° C. to 800° C.

Abstract: A method comprises reacting a compound of the general formula R14−mMOR3m wherein m is an integer from 2 to 4, OR3 is an alkoxy group, and M is an element selected from group 14 of the periodic table; with a compound of the general formula R2X2+Mg, wherein X2 is Br or I; where R1 and R2 are independently selected from alkyl, alkenyl, aryl, alkynyl, or epoxy, and wherein at least one of R1 and R2 is partially or fully fluorinated; so as to make a compound of the general formula R2R14−mMOR3m−1; followed by reacting R2R14−mMOR3m−1 with a halogen or halogen compound in order to replace one or more OR3 groups with a halogen group so as to form R2R14−mMOR3m−1−nXn, where X is a halogen and n is from 1 to 3 and m<n—except where R1 is fluorinated phenyl, M is Si and OR3 is ethoxy.

Abstract: There is disclosed a convenient and efficient process for producing a fluorinated silicon compound which comprises reacting a silicon compound having at least one group selected from the group consisting of a hydroxyl group, an alkoxy group, and an aryloxy group bonded to silicon atom, with a compound represented by the formula (1): wherein R1, R2, R3, and R4 may be the same or different, and each represents a substituted or unsubstituted, saturated or unsaturated alkyl group, or a substituted or unsubstituted aryl group; and R1 and R2 or R3 and R4 can bond to form a ring having one or more nitrogen atoms or having one or more nitrogen atoms and other hetero atoms; or R1 and R3 can bond to form a ring having two or more nitrogen atoms or having two or more nitrogen atoms and other hetero atoms, to fluorinate the groups.

Abstract: 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 of the copper-containing residues is oxidized to CuCl2 using mineral acid and oxidant, where mineral acid or oxidant or mineral acid and oxidant contain chlorine, giving an aqueous CuCl2 solution, and in a second step, the aqueous CuCl2 solution is reduced to CuCl using elemental iron.

Abstract: An electroluminescence element (EL) obtained by using a silacyclopentadiene derivation expressed by the general formula (I) and the derivative are provided. ##STR1## (wherein X and Y are independently hydrocarbon radicals with from 1 to 6 atoms and R.sub.1 to R.sub.4 are hydrogen, halogens, alkyl radicals with from 1 to 6 carbon atoms, or a condensed (un)substituted ring if being adjacent).

Abstract: An electroluminescence element (EL) obtained by using a silacyclopentadiene. derivation expressed by the general formula (I) and the derivative are provided. ##STR1## (wherein X and Y are independently hydrocarbon radicals with from 1 to 6 atoms and R.sub.1 to R.sub.4 are hydrogen, halogens, alkyl radicals with from 1 to 6 carbon atoms, or a condensed (un)substituted ring if being adjacent).

Abstract: A novel method for the synthesis of chlorinated or partially chlorinated organosilanes and organopolysilanes. The chlorination is effected by contacting an organosilanes or organopolysilanes with anhydrous CuCl.sub.2 in a nonpolar alkane solvent, preferably pentane or hexadecane, without the use of a catalyst. Copper metal, which is easily filtered, is a reaction product. The filtrate containing the chlorinated organosilane or organopolysilane can be used directly as a reactant to produce, for example, aminoorganosilanes.

Abstract: A process for preparing a silacyclohexane compound of the general formula ##STR1## wherein R and Q are, respectively, defined substituents, which process comprising the steps of converting a compound of the following formula ##STR2## to a halosilacyclohexane of the following formula ##STR3## wherein X is a halogen, reacting the halosilacyclohexane with an alcohol to obtain an alkoxysilacyclohexane of the formula which is equilibrated in steric configuration, and ##STR4## reducing the equilibrated alkoxysilacyclohexane whereby a trans form silacyclohexane compound is predominantly produced.

Abstract: By reacting Si(OR).sub.4 with HF, FSi (OR).sub.3 of high purity can be obtained easily and economically.

Abstract: The invention is directed to the preparation of fluorosilanes, such as, for example, alkyl, cycloalkyl, aryl, alkoxy, aryloxy and siloxy fluorosilanes by the action of hydrogen fluoride on substrates containing at least one silicon-hydride bond.

Abstract: A process for the selective high yield halogenation R--CH.sub.3 wherein R is ##STR1## Si(Cl).sub.m (CH.sub.3).sub.n, wherein m is 1 to 3, n is 1 to 3 and m+n is 3; phenyl; or phenyl substituted with Cl, Br, F, OR.sup.1, SR.sup.1 or NO.sub.2 ; R.sup.1 is C.sub.1 -C.sub.3 alkyl; and X is chlorine or bromine; under reactive distillation conditions which continuously and selectively separate the mono, di, or trihalogenated product from the reaction zone and which does not require recycling of the starting materials is disclosed.

Abstract: Dimethylchlorosilane and a triorganochlorosilane of the formula: R.sup.1 R.sup.2 R.sup.3 SiCl wherein R.sup.1, R.sup.2, and R.sup.3 are independently selected from monovalent hydrocarbon groups are concurrently prepared by reacting dimethyldichlorosilane with a SiH bond-containing silane compound of the formula: R.sup.1 R.sup.2 R.sup.3 SiH in the presence of a Lewis acid catalyst. The method is especially effective for concomitant preparation of dimethylchlorosilane and trimethylchlorosilane or t-butyldimethylchlorosilane in an inexpensive, simple, safe manner and in high yields.

Abstract: A process for recovering chlorine present in a gaseous vent stream. The process comprises contacting a gaseous vent gas comprising hydrogen chloride and a hydrosilane with a chlorination catalyst to form a more chlorinated silane. The chlorination of the hydrosilane captures the chlorine of the hydrogen chloride as a substituent of the resulting chlorosilane and provides for a readily condensable chlorosilane.

Abstract: A triorganomonohalogenosilane is prepared by reacting a triorganomonohydrosilane represented by the following general formula (I):R.sup.1.sub.3 S i H (I)with a halogenated allyl compound represented by the following general formula (II): ##STR1## in the presence of metal palladium, or a salt or complex of palladium to replace the hydrogen atom directly bonded to the silicon atom of the triorganomonohydrosilane with a halogen atom. In Formula ( I ), the substituents R.sup.1 's directly bonded to the silicon atom may be identical to or different from one another and each represents a monovalent organic group. In Formula (II), the substituents R.sup.2 's may likewise be identical to or different from one another and each represents a hydrogen atom or a monovalent alkyl group and X represents a chlorine atom, a bromine atom or an iodine atom.

Abstract: A method for the preparation of triorganochlorosilane with the general formulaR.sup.1 R.sup.2 R.sup.3 SiCl,where R.sup.1, R.sup.2, and R.sup.3 are independently selected from a group consisting of substituted and unsubstituted monovalent hydrocarbon groups, wherein said method is characterized by the reaction of hydrogen chloride with triorganohydrosilane with the general formulaR.sup.1 R.sup.2 R.sup.3 SiH,where R.sup.1, R.sup.2 and R.sup.3 are as previously described, in the presence of a Group 8 transition metal or complex thereof.

Abstract: The present invention is a process wherein silanes containing hydrogen atoms bonded directly to silicon are removed from silanes of the general formulaR.sub.x Cl.sub.3-x Si--[SiR.sub.y Cl.sub.2-y ].sub.n --A (I)and mixtures thereof, in which R denotes an optionally halogen-substituted hydrocarbon radical having 1 to 18 carbon atoms which is free from ethylenic double bonds, A denotes a chlorine atom or a radical R, x has the value of 0, 1, 2 or 3, y has the value of 0, 1 or 2 and n has the value of 0 or 1. The silanes containing hydrogen atoms bonded directly to silicon are reacted with hydrogen chloride in the presence of silver or gold as catalysts to give the corresponding chlorosilanes.

Abstract: A novel method is proposed for the chlorination of a silicon compound having, in a molecule, at least one hydrogen atom directly bonded to the silicon atom. The method comprises the step of reacting the starting silicon compound with anhydrous copper (II) chloride as a chlorinating agent in the presence of copper (I) iodide as a catalyst so as to substitute a chlorine atom for the silicon-bonded hydrogen atom. When the starting silicon compound has two or more of silicon-bonded hydrogen atoms, the chlorination reaction proceeds stepwise so that the inventive method provides a possibility of selective chlorination.

Abstract: Halogenated polycarbosilanes with uniform or mixed halogenation prepared from aryl-substituted, particularly phenyl-substituted polycarbosilanes by reaction with halogenating reagents under polar or ionic reaction conditions, optionally in the presence of a Lewis acid catalyst. The halogen atom introduced can optionally subsequently be replaced by another halogen atom through a transhalogenation reaction.

Abstract: There is disclosed a process for abstracting electro-negative elements from hetero-molecules, comprising reacting said hetero-molecules under anhydrous conditions with reactive organo-silicon intermediates selected from the group consisting of silyl free radicals and silylenes. The process is particularly suitable for the destruction of existing chlorinated fluorocarbons.

Abstract: A process is disclosed for working up the high-boiling, solids-containing residues obtained in the synthesis of organochlorosilanes which are hydrolyzed and then optionally oxidized, with oxygen-containing gases, comprising adding during hydrolysis and/or oxidation a surface-active substance which hydrophilicizes the surface of the solids.

Abstract: A process is disclosed for working up the high-boiling, solids-containing residues obtained in the synthesis of organochlorosilanes which are hydrolyzed and then optionally oxidized, comprising adding during hydrolysis and/or oxidation a surface-active agent which hydrophilicizes the surface of the solids.

Abstract: A method for the production of tertiary-alkyldimethylhalosilane with the following general structural formula ##STR1## which comprises reacting a silicon compound having the general structural formula(CH.sub.3).sub.3 SiCR.sub.2 X.sup.1,with a Lewis acid metal halide.

Abstract: A method for producing chlorosilanes, which are useful in a wide range of industrial field as an intermediate for organosilicon products such as silicone rubbers, silicone oils, silicone resins, etc. as well as a raw material for the production of organic chemicals such as medicines, agricultural chemicals, dyestuffs, etc., represented by the general formula, ##STR1## wherein R.sub.1 and R.sub.4, which may be the same or different, represent an alkyl group having from 1 to 5 carbon atoms, a chloromethyl group, an ethynyl group or a halogen atom; R.sub.2 and R.sub.3, which may be the same or different, represent an alkyl group having from 1 to 3 carbon atoms; R.sub.5 and R.sub.6, which may be the same or different, represent an alkyl group having from 1 to 2 carbon atoms; and R.sub.7 represents an alkyl group having from 1 to 18 carbon atoms, which comprises reacting a disiloxane represented by the general formula, ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.

Abstract: A process is provided for the treatment of high-boiling, solids- and copper-containing residues produced during organochlorosilane synthesis. The process comprises hydrolyzing, oxidizing the hydrolyzed residues with a free oxygen-containing gas and separating-out a copper-containing solution.

Abstract: Organo(poly)siloxanes having halogen bonded directly to silicon, or acetoxysiloxanes are prepared by reacting organo(poly)siloxanes having hydrogen bonded directly to silicon, with an allyl compound in the presence of metallic palladium, ruthenium or rhodium, or an acetylacetone or phosphine complex, or compound containing palladium, ruthenium or rhodium in which the allyl compound is an allyl halide having 3 carbon atoms per molecule or allyl acetate.

Abstract: A process for the preparation of hydrogenosilanes or halogenosilanes corresponding to the general formula I:R--SiR'.sub.

Abstract: Dicyanogen is prepared by reacting trimethylsilyl cyanide with cyanogen halides in the presence of Lewis acids.