Abstract: A process for preparing 1,1-difluoroethane by contacting acetylene with hydrogen fluoride in the presence of an aluminum fluoride containing catalyst, the hydrofluorination being carried out at a temperature between 150 and 350.degree. C. employing a residence time of one to 60 seconds. The catalyst employed is one prepared by imbibing gamma or eta aluminum oxide with a solution of a bismuth salt and a manganese salt. The so-imbibed catalyst is heated at a temperature between 150 and 250.degree. C. initially in a nitrogen atmosphere and then, after complete drying, in a mixture of air employing increasing concentrations of hydrogen fluoride up to 100 percent hydrogen fluoride atmosphere. The finished catalyst contains:0.1 to 20 weight percent of bismuth,0.1 to 10 weight percent of manganese,20 to 38 weight percent of aluminum,32 to 60 weight percent of fluorine,The balance consisting essentially of oxygen.

Abstract: A process for preparing a silicon-nitrogen compound of the formula (R.sub.3 Si).sub.n NR'.sub.3-n or R.sub.2 Si(NR'.sub.2).sub.2 or RSi(NR'.sub.2).sub.3 or cyclic --R.sub.2 SiNR'--.sub.x wherein n is 1 or 2 or 3, R' is a hydrogen atom or an alkyl moiety of 1 to 8 carbon atoms or aryl moiety, R represents an alkyl moiety of 1 to 20 carbon atoms or aryl moiety and x is 3 or 4, by contacting a hydrogen silane of the formula R.sub.4-y SiH.sub.y where y is 1 or 2 or 3 and R has the above-described meaning with an ammonia or an amine of the formula NR'.sub.3-n H.sub.n' where R' and n have the above meanings in the presence of a catalyst.

Abstract: An improvement in a process for the preparation of an .alpha.-chloromethylsilane of the general formulaClCH.sub.2 (CH.sub.3).sub.3-n SiCl.sub.n (n = 0 to 3) IIby chlorination of a methylchlorosilane of the general formula(CH.sub.3).sub.4-n SiCl.sub.n Iwith elemental chlorine while exposing the reaction mixture to light, the improvement residing in maintaining the reaction mixture at a temperature in the vicinity of the boiling point of the methylsilane to be chlorinated by regulating the metering in of methylsilane to be chlorinated and continuously passing chlorine gas through the reaction zone at a constant rate and withdrawing reaction product at such a rate that the concentration of chloromethylsilane amounts up to 18 weight percent.

Abstract: A keto-group-containing silane of the formula ##STR1## WHEREIN R independently represents an alkyl, cycloalkyl, alkyloxyalkyl and phenyl group,R' represents an unsubstituted straight-chained or branched alkylene or alkenyl cycloalkylene or cycloalkenyl group having 2 to 8 carbon atoms,R" represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,R"' represents a hydrogen atom, a straight-chained or branched alkyl or alkenyl group having 1 to 6 carbon atoms or a C.sub.5 -C.sub.6 cycloalkyl group, andn has the value 1 or 2,And the condensation products thereof; processes for their production and the use thereof and facilitating the adhesion of inorganic oxidic and metallic surfaces to polyaddition or polycondensation polymeric compositions.

Abstract: An alkoxysilane of the formula ##STR1## WHEREIN: R is hydrogen, an alkyl radical of 1 to 4 carbon atoms or an alkenyl radical of C.sub.2 -C.sub.10 ;R' is alkyl;R" is tertiary alkyl;a is 1 or 2;b is 1 or 2;a + b does not exceed 3; andA process for preparing such alkoxysilane by the steps of:A. contacting in the liquid phase and without contacting in the gas phase a halogen silane of the formulaR.sub.a SiX.sub.4-awherein R is hydrogen, alkenyl of C.sub.2 -C.sub.10 or alkyl of C.sub.1 -C.sub.4, a is 1 or 2 and X is halogen with a primary or secondary alcohol having the formula R'OH wherein R' is an alkyl group, an alkylene group or a polymer hydroxyalkylene group having a terminal alkyl ether grouping, said alcohol present in an amount not in excess of a 10% stoichiometric excess whereby to produce a halogen alkoxysilane; andB. thereafter contacting said halogen alkoxysilane with an alcohol of the formula R"OH wherein R" is a tertiary alkyl group of C.sub.4 -C.sub.8 in the presence of an acid-binding agent.

Abstract: A sulfurous organosilicon compound of the general formula ##STR1## IN WHICH R represents a C.sub.1-4 alkyl, a cycloalkyl, a C.sub.1-4 alkyloxyalkyl or a phenyl radical,R' = a branched or unbranched alkylene radical of 1-6 carbon atoms, or a phenylene or benzylene radical,R" = oxygen or sulfur atom,R'" = hydrogen or CH.sub.3,X = 1 or 2, andn = 1 or 2,Processes for its production and its use as an adhesivizing agent to join inorganic substances to organic substances.

Abstract: An improvement in a process for preparing N,N'-bis-trimethylsilylurea by reaction of urea with hexamethyldisilazane at an elevated temperature accompanied with ammonia evolution wherein the reaction is carried out in the presence of an acid catalyst.

Abstract: An improved process for the hydrochlorination of vinyltrichlorosilane to prepare .beta.-chloroethyltrichlorosilane, which hydrochlorination is carried out by reacting the vinyltrichlorosilane with HCl in the presence of a Lewis catalyst, the improvement lying in carrying out the reaction at a temperature between 30.degree. and 65.degree. C, preferably at normal pressure.

Abstract: An improvement in a process for preparing silicon tetrachloride or silicon trichloride wherein elemental silicon is contacted with hydrogen chloride in a fluidized bed, the improvement residing in carrying out the process in the presence of an iron compound, which iron compound is present in an amount such that when calculated as iron, the iron content is 10 to 43 weight percent based on the weight of the total solids in the fluidized bed, at a temperature in the range of 260.degree.-600.degree. C, preferably in the absence of an inert gas.

Abstract: An improvement in a process for the preparation of an alkoxysilane of the formula:R.sub.4.sub.-n.sub.-m Si(OR').sub.n Cl.sub.mwhereinR is hydrogen or a saturated or unsaturated, chlorinated or unchlorinated alkyl radical of 1 to 12 carbon atoms;R' is an alkyl radical of 1 to 11 carbon atoms which can contain a hetero atom in the chain;m equals 0 to 3;n equals 1 to 4;n + M is equal to or less than 4;By esterification of a chlorosilane of the formula:R.sub.4.sub.-n SiCl.sub.

Abstract: A method for protecting the surface of a metal surface which comprises applying to said surface an organophosphorus compound of the formula ##STR1## wherein A IS 0 OR 1R is a branched or unbranched chained bivalent alkylene radical of 1 to 12 carbon atoms which is substituted or unsubstituted and can contain in the chain structure --O--, --S--, ##STR2## R' is a branched or unbranched alkyl radical of 1 to 12 carbon atoms which can be halogen substituted and can contain in the chain structure ##STR3## X is an epoxy ring, halogen, alkylene, carboxylic acid ester residue, amino, isocyanato, isothiocyanato, urea, thiourea, urethano, alkyl substituted thio radical or the radical or a heterocyclic ring containing O, S or N in the ring structure; a new organophosphorus compounds having the formula set forth above and more particularly defined by specific chemical structures.

Abstract: The use of certain chloroplatinic complex compounds of the formula:[Pt R.sup.1 Cl.sub.2 ].sub.awherein a is 1 or 2 and R.sup.1 is an unsaturated ketone residue, to catalyze the addition of alkoxy, aryloxy or halo hydrogen silanes to aliphatically unsaturated compounds (carbon to carbon unsaturation such as olefins and/or acetylenes). The products of the reaction can be used as additives for plastics and synthetic resins.

Abstract: A process for preparing monosilane and low silane esters thereof which comprises contacting a hydrogen silane ester of the formula H.sub.x Si(OR).sub.4.sub.-x, wherein R represents an alkyl or alkoxyalkyl moiety and x is 1, 2 or 3, with a catalyst of an element of the first group and/or the second or third main or secondary group of the periodic system or iron or manganese or and organic nitrogen compound under distillation conditions and recovering a product having the formula H.sub.x.sub.+1 Si(OR).sub.4.sub.-x.sub.-1 and/or a product of the formula H.sub.x.sub.-1 Si(OR).sub.4.sub.-x.sub.+1.

Abstract: A process for the purification of contaminated 1,1,1-trifluoro-2-chloro-2-bromoethane by reaction of the compound with organic amines, yielding 1,1,1-trifluoro-2-chloro-2-bromoethane of sufficient purity for use as an anaesthetic.

Abstract: A process for the preparation of a partial or complete trichlorosilane ester of the formulaH-Si(OR).sub.3-n Cl.sub.nwherein n is 0 or 1, R is an alkyl group of 1 to 11 carbon atoms, an alkyl group of 1 to 11 carbon atoms containing an oxygen atom in the chain, or an alkyl group of 1 to 11 carbon atoms containing a sulfur atom in the chain which comprises:1. Forming a partial esterification product by contacting a trichlorosilane with up to a 10% stoichiometric excess of a primary alcohol, the stoichiometric amount corresponding to only partial esterification of said trichlorosilane, said contacting being conducted only in the liquid phase without any contact in the vapor phase;2. Removing HCl formed from the reaction vessel;3. Thereafter contacting the partial esterification product with additional primary alcohol and removing liberated residual HCl from the reaction vessel.

Abstract: Improvement in the catalytic hydrofluorination of halogenated hydrocarbons by carying out the hydrofluorination with a catalyst which is 0.1 to 20 wt. % bismuth, 35 to 66 wt. % fluorine, 24 to 42 wt. % aluminum, and the remainder oxygen. A preferred catalyst also contains manganese.

Abstract: The use of certain chloroplatinic complex compounds of the formula:[Pt R.sup.1 Cl.sub.2 ].sub.awherein a is 1 or 2 and R.sup.1 is an unsaturated ketone residue, to catalyze the addition of alkoxy, aryloxy or halo hydrogen silanes to aliphatically unsaturated compounds (carbon to carbon unsaturation such as olefins and/or acetylenes).

Abstract: Glycidylexypropylalkoxysilanes are produced by thermal treatment of novel siliceous dioxalane derivatives of the formula: ##EQU1## wherein a is 0 to 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.