Abstract: Hexachlorodisilane and residues formed therefrom are disposed of without generating pyrophoric compositions by reaction with urea and alcohol in nonpolar solvent.

Abstract: Highly efficient thermal insulation is produced at low cost by blending pyrogenic silica with a silicon-containing ash, the mixture thus produced containing no perlite. The pyrogenic silica has a synergistic effect in lowering thermal conductivity.

Abstract: The invention relates to a method for producing neopentasilanes of the general formula (1) Si(SiR3)4 (1), wherein silicon compounds of the general formula (2) R3Si—(Si—)xSiR3 (2), wherein R is selected from H, Cl, Br, and I and x stands for a nonnegative integer up to 5, are reacted in the presence of ether compounds (E).

Abstract: A process for preparing 1,3,5-triethyl-2,4,6-trihydrido-2,4,6-triethylamino-1,3,5-triaza-2,4,6-trisilacyclohexane, wherein trichlorosilane is reacted with ethylamine in a solvent.

Abstract: Ultra high purity hexachlorodisilane is prepared from hexachlorodisilane-containing mixtures from numerous sources by distillation wherein water is present at less than 10 ppbw.

Abstract: The invention relates to cyclic aza-sila compounds that are made of 4 to 10 units of the general formulas (I) and (II) bonded by means of Si—Si or Si—N single bonds, wherein Y is selected from among —NR1R2, hydrogen, and a halogen, R1 and R2 are selected from among hydrogen and a hydrocarbon group having 1 to 20 carbon atoms, and R3 is a hydrocarbon group having 1 to 20 carbon atoms, with the stipulation that at least two units of the general formula (I) are bonded to each other in the ring by means of an Si—Si single bond, that at most 35 mol % of the groups Y is a hydrogen, and that at most 15 mol % of the groups Y is a halogen, and to a method for the production thereof.

Abstract: The invention relates to a method for producing oligoaminosilanes of the general formula (I) SinY2n+2, wherein oligohalosilanes of the general formula (II) SinX2n+2 are reacted with primary amines of the general formula (III) R—NH2 in hydrocarbons as solvents, wherein X is selected from among chlorine, bromine, and iodine, Y is a halogen, hydrogen, or R—NH, R is a hydrocarbon group having 1 to 20 carbon atoms, and n is values from 1 to 20, with the stipulation that at most 35 mol % of the groups Y is a hydrogen and at most 15 mol % of the groups Y is a halogen, wherein activated carbon is added to the reaction mixture. The invention further relates to a method for stabilizing the oligoaminosilanes of the general formula (I), wherein the oligoaminosilanes are treated with activated carbon.

Abstract: Hexachlorodisilane and residues formed therefrom are disposed of without generating pyrophoric compositions by reaction with urea and alcohol in nonpolar solvent.

Abstract: The invention relates to a method for removing titanium compounds from hexachlorodisilane, wherein hexachlorodisilane is treated with an organic compound (V) which contains the structural units ?C—S— or ?C—O—.

Abstract: A process for preparing 1,3,5-triethyl-2,4,6-trihydrido-2,4,6-triethylamino-1,3,5-triaza-2,4,6-trisilacyclohexane, wherein trichlorosilane is reacted with ethylamine in a solvent.

Abstract: The invention relates to cyclic aza-sila compounds that are made of 4 to 10 units of the general formulas (I) and (II) bonded by means of Si—Si or Si—N single bonds, wherein Y is selected from among —NR1R2, hydrogen, and a halogen, R1 and R2 are selected from among hydrogen and a hydrocarbon group having 1 to 20 carbon atoms, and R3 is a hydrocarbon group having 1 to 20 carbon atoms, with the stipulation that at least two units of the general formula (I) are bonded to each other in the ring by means of an Si—Si single bond, that at most 35 mol % of the groups Y is a hydrogen, and that at most 15 mol % of the groups Y is a halogen, and to a method for the production thereof.

Abstract: The invention relates to a method for producing oligoaminosilanes of the general formula (I) SinY2n+2, wherein oligohalosilanes of the general formula (II) SinX2n+2 are reacted with primary amines of the general formula (III) R—NH2 in hydrocarbons as solvents, wherein X is selected from among chlorine, bromine, and iodine, Y is a halogen, hydrogen, or R—NH, R is a hydrocarbon group having 1 to 20 carbon atoms, and n is values from 1 to 20, with the stipulation that at most 35 mol % of the groups Y is a hydrogen and at most 15 mol % of the groups Y is a halogen, wherein activated carbon is added to the reaction mixture. The invention further relates to a method for stabilizing the oligoaminosilanes of the general formula (I), wherein the oligo ammosilanes are treated with activated carbon.

Abstract: The invention relates to a method for removing titanium compounds from hexachlorodisilane, wherein hexachloro-disilane is treated with an organic compound (V) which contains the structural units ?C—S— or ?C—O—.

Abstract: The invention relates to a method for producing neopentasilanes of the general formula (1) Si(SiR3)4 (1), wherein silicon compounds of the general formula (2) R3Si—(Si—)xSiR3 (2), wherein R is selected from H, Cl, Br, and I and x stands for a nonnegative integer up to 5, are reacted in the presence of ether compounds (E).

Abstract: Ultra high purity hexachlorodisilane is prepared from hexachlorodisilane-containing mixtures from numerous sources by distillation wherein water is present at less than 10 ppbw.