Abstract: Novel bis-(silylethyl)-oligosulphides are obtained by reacting a vinyl silane of the formula (CH.sub.2 .dbd.CH).sub.m -SiR.sub.n.sup.1 R.sub.4-(m+n) in which R represents chlorine, bromine, iodine, C.sub.1 -C.sub.3 -alkoxy, 2-methoxyethoxy, 2-ethoxyethoxy or hydroxy, R.sup.1 represents C.sub.1 -C.sub.3 -alkyl, phenyl or C.sub.5 -C.sub.7 -cycloalkyl, n is 0, 1 or 2, m is 1 or 2 and m+n is 1, 2 or 3 with sulphur as well as in a given case hydrogen sulphide in molar ratios of vinyl silane to sulphur of from 1:2.5 to 1:10 and vinyl silane to hydrogen sulphide of from 1:0 to 1:5 at temperatures between about 100.degree. and 200.degree. C. under pressure of from 1 to 25 bars (total pressure at the reaction temperature) and in the presence of sulphidation catalysts known per se, in a given case followed by hydrolysis or partial hydrolysis of the reaction products.

Abstract: There are prepared aqueous solutions of cationic organosilicon compounds which are produced by reacting an alkoxysilylalkyl halide of the formula (RO).sub.3-n R.sub.n.sup.1 --Si--R.sup.2 --X (I) where R is C.sub.1 to C.sub.5 alkyl, methoxy, ethoxy, phenyl, or C.sub.5 to C.sub.8 cycloalkyl; R.sup.1 is C.sub.1 to C.sub.5 alkyl, phenyl, tolyl, benzyl, or C.sub.5 to C.sub.8 cycloalkyl; R.sup.2 is a divalent ethylenic double bond free hydrocarbon group having 3 to 8 carbon atoms, n is zero, 1 or 2 and X is chlorine, bromine, or iodine with a tertiary amine of the formula R.sup.3 NR.sup.4 R.sup.5 (II) where R.sup.3, R.sup.4, and R.sup.5 are the same or different and each is an alkyl group or benzyl in which the number of carbon atoms of the alkyl group or the alkyl groups together is up to 30 or R.sup.4 and .sup.

Abstract: In order to be independent of the situation in regard to methane and natural gas and at the same time to obtain a heating gas there is employed in the hydrocyanic acid-methane-ammonia process (the BMA process) in place of methane an alkanol or alkanediol having 2-4 carbon atoms, preferably ethyl alcohol, and this is reacted with ammonia in a C:N ratio of 0.8:1 to 2:1. Optionally additional hydrogen can be present.

Abstract: Novel bis-(silylethyl)-oligosulphides are obtained by reacting a vinyl silane of the formula (CH.sub.2 .dbd.CH).sub.m -- SiR.sub.n.sup.1 R.sub.4 -(m+n) in which R represents chlorine, bromine, iodine, C.sub.1 -C.sub.3 -alkoxy, 2-methoxyethoxy, 2-ethoxyethoxy or hydroxy, R.sup.1 represents C.sub.1 -C.sub.3 -alkyl, phenyl or C.sub.5 -C.sub.7 -cycloalkyl, n is 0, 1 or 2, m is 1 or 2 and m+n is 1, 2 or 3 with sulphur as well as in a given case hydrogen sulphide in molar ratios of vinyl silane to sulphur of from 1:2.5 to 1:10 and vinyl silane to hydrogen sulphide of from 1:0 to 1:5 at temperatures between about 100.degree. and 200.degree. C. under pressure of from 1 to 25 bars (total pressure at the reaction temperature) and in the presence of sulphidation catalysts known per se, in a given case followed by hydrolysis or partial hydrolysis of the reaction products.

Abstract: The subject of the invention is a process for the manufacture of (iodoorganyl)alkoxysilanes of the general formula: ##STR1## in which R.sup.1 is an alkylene group, R.sup.2 is an alkoxy group and R.sup.3 and R.sup.4 an alkoxy group and/or an alkyl or aryl group, whereby the chlorine or bromine compound corresponding to that of formula (1) is caused to react with stoichiometric to double molar quantities of an inorganic iodine donor in the presence of 0.01-5 mol % of an organic substituted onium salt of nitrogen, phosphorus, arsenic or antimony or an organic substituted sulfonium salt or a crown ether as catalyst, in certain solubilizing agents.

Abstract: There are prepared nitrogen containing alkoxysilanes of the formula (RO).sub.3-n (CH.sub.3).sub.n Si(CH.sub.2).sub.m NHCON.sub.3 in which R is an alkyl group having 1 to 3 carbon atoms, n is 0, 1 or 2 and m is 1, 2 or 3 by a process comprising dissolving in an inert solvent an isocyanate group containing silane of the formula (RO).sub.3-n (CH.sub.3).sub.n Si(CH.sub.2).sub.m N.dbd.C.dbd.O in which R, n and m are as defined above and reacting the silane with a water free hydrogen nitride or with hydrogen halide and an alkali metal-alkaline earth metal-, or ammonium azide at a temperature between 0.degree. C. and the boiling point of the inert solvent. The compounds are useful in making phosphinimines.

Abstract: There is required titanium disulfide of high purity and stoichiometric composition as electrode material for certain types of batteries. With the known process for reacting preheated gaseous titanium tetrachloride with an excess of preheated gaseous hydrogen sulfide at 400.degree. to 600.degree. C., there is obtained a product which is not optimally usable. A titanium disulfide quality of higher purity and stoichiometry is obtained by forcing a deposition of the titanium disulfide on the inner walls of the reactor through regulating the temperature at the reactor walls and/or the residence time of the gaseous mixture. The titanium disulfide can be mechanically stripped off the walls and removed countercurrently to the waste gas stream from the reactor.

Abstract: Hydrogen cyanide in hydrogen cyanide containing gas is transformed into ammonia by a special iridium catalyst in the presence of at least the equivalent amount of hydrogen for the change. The ammonia is analyzed to provide a measure of the hydrogen cyanide in the hydrogen cyanide containing gas.

Abstract: By introducing the reaction gas mixture of hydrocarbons and ammonia at increased velocity through an inlet tube with one or more openings in a customary reaction tube in the hydrocyanic acid-methane-ammonia (BMA) process the yield of HCN is increased considerably.

Abstract: For the reduction of the ammonia content in the product gas of the hydrocyanic acid-methane-ammonia (BMA) process and accordingly to increase the yield the reaction gas mixture of this process is brought into contact with zeolite and the ammonia thereafter desorbed from the zeolite preferably again employed in the reaction step. If the desorption is carried out with a flushing gas such as the hydrocarbon used in the reaction then this mixture can be directly supplied again to the BMA reactor. Through this procedure the amount of ammonia previously lost to the process can again be made useful in the process itself.

Abstract: There is prepared pyrogenically produced silicon dioxide-mixed oxide having a BET surface area of 50 to 400 m.sup.2 /g which contains as a constituent of the mixed oxide:0.01 to 10 weight % zirconium dioxide or0.01 to 10 weight % iron oxide (ferric oxide) or0.01 to 9.9 weight % titanium dioxide.Because of the doping with the foreign oxide the silicon dioxide-mixed oxide is more temperature stable than the undoped silicon dioxide. The product can be used as thermal insulation either as unpressed material in free bulk form or as a compacted mixture.

Abstract: The known hydrocyanic acid-methane-ammonia (BMA) process for the production of hydrogen cyanide can now be carried out with liquified gases namely through the presence of additional hydrogen at the beginning of the reaction. The atomic ratio of carbon to nitrogen and hydrogen is from 1:1:7.1 to 1:1.33:13. As additional hydrogen there is the portion of hydrogen present coming out of the reaction "hydrocarbon+NH.sub.3 ". Otherwise the reaction conditions are the same as in the known BMA process.

Abstract: There is provided temperature stabilized pyrogenically produced aluminum oxide-mixed oxide having a BET surface area of 50 to 200 m.sup.2 /g which contains 0.5 to 20 weight % silicon dioxide as a constituent thereof. Because of the silicon dioxide constituent the aluminum oxide does not change into the .alpha.-Al.sub.2 O.sub.3 phase until 1350.degree. C. The temperature stabilized aluminum oxide-mixed oxide is suitable for the production of thermal insulation compositions.

Abstract: The invention relates to coordination compounds of rhodium with silicon-substitued dialkyl or diaryl sulfide groups as ligands in monomeric, polymeric or carrier-fixed forms. The substance can be used as catalysts.

Abstract: Hydrogen cyanide in hydrogen cyanide containing gas is transformed into ammonia by a special iridium catalyst in the presence of at least the equivalent amount of hydrogen for the change.

Abstract: 4,4'-isopropylidene-bis(2,6-dibromophenol) is produced by reacting 4,4'-isopropylidene diphenol with hydrogen bromide or a mixture of hydrogen bromide with up to an equimolar amount of free bromine in admixture with hydrogen peroxide and in the presence of water and an inert organic liquid.