Abstract: A dried silica gel containing a reagent in insolubilized form which reagent is normally soluble, especially a dried silica gel containing an insolubilized form of a normally soluble colorimetric analytical agent and a method of preparing such dried silica gel by hydrolyzing a silane having from 1 to 4 alkoxy groups in a homogeneous phase in the presence of a reagent which is normally soluble in a solvent, recovering the resultant gel and drying the same.

Abstract: The present invention relates to the cleavage of organosiloxanes with hydrogen chloride with the formation of organochlorosilanes. In accordance with the invention, this cleavage is performed at temperatures below 20.degree. C., and the dihydrates and trihydrates of the hydrogen chloride are formed. These settle as the specifically heavier, liquid phase and thus can easily be separated from the organochlorosilanes. The preferred temperature range in which the procedure of the invention is performed is between +10.degree. C. and -10.degree. C., while yields of as much as 99% of the desired organochlorosilane are obtained. The process can also be performed continuously.The inventive process is particularly useful because it can be used to convert contaminated organosiloxanes, such as used heat exchange or hydraulic oil materials, into useful products.

Abstract: An adduct of phenol with an aminoorganosilane ester with salt-like charge-transfer-complex structure of the general formula ##STR1## wherein R represents an alkyl moiety of 1 to 8 carbon atoms or ethylene glycol or polyethylene glycol or propylene glycol or polypropylene glycol moieties terminally closed with a lower alkyl or acyl group;R' represent hydrogen or alkyl moieties having 1 to 20 carbon atoms optionally containing one or more ether bridges, a cycloalkyl moiety or an aryl moiety;R" represents alkyl with 1 to 8 carbon atoms;X represents halogen or C.sub.1-14 alkyl moieties or a nitro group;a being a value of 0 to 3;b a value of 0 to 5;c a value of 0 to 20; andn a value of 1 to 6;and a process for preparing the same.

Abstract: A compound of tetravalent vanadium of the general formula ##STR1## wherein M represents a metal of the fourth group of the Periodic Table of the Elements and R represents and alkyl, cycloalkyl or aryl moiety of 1 to 20 carbon atoms and a process for its preparation. Also disclosed is the use of such vanadium compound as a catalyst for homopolymerization, copolymerization or terpolymerization of various monomers including olefins and vinyl monomers.

Abstract: Process for purifying hexamethyldisiloxane contaminated with toluene or other solvents that cannot be completely separated from the hexamethyldisiloxane by distillation, based on the discovery that hexamethyldisiloxane forms a previously unknown azeotrope with acetonitrile. This azeotrope has a heavier phase that is rich in acetonitrile and a lighter phase that is rich in hexamethyldisiloxane. These phases are mutually immiscible. The azeotrope starts to boil at 71.4.degree. C., which permits the hexamethyldisiloxane to be separated at relatively low temperatures from the impurities. The process involves one or more entrainment distillations in the presence of an excess of acetonitrile and the re-separation of the acetonitrile from the resulting lighter phase by distillation. Two further novel azeotropic systems, one consisting of hexamethyldisiloxane and toluene and the other of acetonitrile and toluene, are provided.

Abstract: A compound of tetravalent vanadium of the general formula ##STR1## wherein M represents a metal of the fourth group of the Periodic Table of the Elements and R represents and alkyl, cycloalkyl or aryl moiety of 1 to 20 carbon atoms and a process for its preparation. Also disclosed is the use of such vanadium compound as a catalyst for homopolymerization, copolymerization or terpolymerization of various monomers including olefins and vinyl monomers.

Abstract: A process for the preparation of a halogen silane and an aromatic compound having at least one --C.dbd.O-- of ##STR1## group, while simultaneously effecting cleavage of a siloxane by contacting a compound having at least one aromatically bound mono and/or dihalogen methylene group or an aromatic compound having a mono-, di and or trihalogen methyl group of the formula ##STR2## wherein the aromatic moiety can be optionally otherwise substituted, with a siloxane of the formula ##STR3## wherein each R moiety is independently selected from the group consisting of halogen, alkyl, alkenyl and O-SiR.sub.

Abstract: A dried silica gel containing a reagent in insolubilized form which reagent is normally soluble, especially a dried silica gel containing an insolubilized form of a normally soluble colorimetric analytical agent and a method of preparing such dried silica gel by hydrolyzing a silane having from 1 to 4 alkoxy groups in a homogeneous phase in the presence of a reagent which is normally soluble in a solvent, recovering the resultant gel and drying the same.

Abstract: An adduct of phenol with an aminoorganosilane ester with salt-like charge-transfer-complex structure of the general formula ##STR1## wherein R represents an alkyl moiety of 1 to 8 carbon atoms or ethylene glycol or polyethylene glycol or propylene glycol or polypropylene glycol moieties terminally closed with a lower alkyl or acyl group;R' represent hydrogen or alkyl moieties having 1 to 20 carbon atoms optionally containing one or more ether bridges, a cycloalkyl moiety or an aryl moiety;R" represents alkyl with 1 to 8 carbon atoms;X represents halogen or C.sub.1-4 alkyl moieties or a nitro group;a being a value of 0 to 3;b a value of 0 to 5;c a value of 0 to 20; andn a value of 1 to 6; and a process for preparing the same.

Abstract: A water-insoluble dye pigment especially useful in the coloring of plastic articles and a method of preparing the same by hydrolyzing a water-soluble dye with an organooxysilane and drying the resultant gel.

Abstract: A process for preparing a gamma amino propyl alkoxy silane of the formula ##STR1## wherein R is an alkyl moiety of 1 to 4 carbon atoms, R' is methyl or phenyl, and y is 0, 1 or 2 which comprises contacting the corresponding gamma-chloropropyl alkoxy silane with ammonia under pressure at a temperature between 50.degree. and 90.degree. C. while stirring the reaction mixture.

Abstract: An improvement in a process for the esterification of a organochlorosilane by feeding alcohol into a chlorosilane maintained within a reaction zone without said alcohol contacting said chlorosilane in the gas phase wherein the esterification is performed stepwise with extraction of hydrogen chloride which has developed, the improvement which comprises employing in at least a final esterification step an organochlorosilane of the formulaH.sub.a R.sub.b SiCl.sub.4-a-bwhereinR represents an optionally halogen-substituted alkyl radical which can also contain an oxygen or sulfur atom in the chain, or a halogen or a NO.sub.2 group or a protected phenolic group containing aryl radical,a equals 0, 1, or 2,b equals 1 or 2, anda+b amounts to a maximum of 3,said final esterification step being performed with the addition of heat.

Abstract: An improvement in a process for forming an orthosilicic acid ester or an oligomer thereof by contacting a tetrachlorosilane or higher homolog thereof with a primary alcohol, the improvement which comprises introducing the alcohol directly into a tetrachlorosilane liquid phase without said alcohol touching the gas phase and, after completion of the reaction, removing hydrogen chloride formed during the reaction from the reaction zone.

Abstract: An improved process for the preparation of alkylsilanes and/or alkylsilanes substituted at the alkyl group by an addition reaction in the presence of a platinum or palladium supported catalyst wherein the reaction mixture is heated to its boiling point, condensed and the condensate contacts the catalyst, the improvement residing in vaporizing the reaction mixture and maintaining the vapors in out of contact relationship with respect to the platinum or palladium supported catalyst and contacting the reaction mixture only after it has condensed with the platinum or palladium supported catalyst and recovering the condensed reaction product.

Abstract: Glycidyloxypropylalkoxysilanes are produced by thermal treatment of novel siliceous dioxolane derivatives of the formula: ##STR1## wherein a is 0 or 1 and R represents an oxygen radical or two hydrogen atoms and R' and R" each represents an alkyl radical, wherein the R" 's can be the same or different. The glycidyl products are useful as adhesives.

Abstract: A process for the production of an ethylsilane, which comprises contacting vinyl chloride with hydrogen silane in the presence of a platinum or palladium catalyst at a pressure of not less than 5 bars.

Abstract: An improvement in a method of preparing 1,1-difluoroethylene from 1,1-difluoroethane by photochlorinating 1,1-difluoroethane to 1,1-difluoro-1-chloroethane and immediately thereafter reacting the reaction products of the photochlorination at a temperature between 550 and 750.degree. C. without isolation of the 1,1-difluoro-1-chloroethane, the improvement residing in employing as the difluoroethane charge an unrefined product of the hydrofluorination of acetylene which unrefined reaction product contains up to 3 volume percent acetylene and a maximum of 8 volume percent vinyl fluoride, especially a unrefined reaction product in which the difluoroethane has not been isolated.

Abstract: An improvement in the process for the esterification of chlorosilanes with alcohols wherein the esterification is carried out in the presence of a chlorohydrocarbon and in the absence of an acid binding agent.

Abstract: In a process for preparing a halogen alkyl silane by contacting an alkyl silane of the formulaR.sub.n SiR'.sub.4-nwhereinR represents a substituted or unsubstituted alkyl or alkenyl group,R' represents an alkyl group, andN represents 0, 1, or 2With a hydrogen halide in the presence of a catalyst, the improvement which comprises employing as the catalyst an aluminum oxide-containing composition.

Abstract: Method of preparing 1,1-difluoroethylene from 1,1-difluoroethane by photochlorinating 1,1-difluoroethane to 1,1-difluoro-1-chloroethane and immediately thereafter reacting the reaction products of the photochlorination at temperatures between 550 and 750.degree. C. without isolation of the 1,1-difluoro-1-chloroethane.