Abstract: The invention relates to an adhesive tape for jacketing elongated items such as more particularly leads or cable sets, comprising a tapelike carrier provided on at least one side with a curable adhesive, characterized in that the adhesive tape is further provided on one side of the tapelike carrier with a release layer of carbamate.

Abstract: A two-stage process for the preparation of organic isocyanates by reacting primary amines with phosgene in which: a) in a first stage, amine and phosgene are reacted in an adiabatically managed reaction, in which the temperature of reaction is restricted to values between 100 and 220° C. by actively adjusting the absolute pressure in the reactor to values between 8 and 50 bar by decompression, and the temperature is held at values between 100 and 220° C. until the stoichiometric conversion of phosgene has reached at least 80%; and then b) in a second stage, the reaction mixture from a) is decompressed to an absolute pressure of 1 to 15 bar and the reaction mixture is reacted further at temperatures between 90 and 240° C., optionally with the introduction of heat.

Abstract: The invention relates to a process for the production of Raney nickel catalysts. In this process, the melt of an alloy comprising from 40 to 95 wt. % aluminum, from 5 to 50 wt. % nickel, 0 to 20 wt. % iron, from 0 to 15 wt. % of one or more transition metals selected from the group consisting of cerium, cerium mixed metal, vanadium, niobium, tantalum, chromium, molybdenum and manganese, and, optionally, additional glass-forming elements, is brought into contact with one or more rotating cooling rollers or cooling plates and is allowed to cool and solidify thereon. The cooling rollers have a surface structured by means of transverse grooves, and the cooling plates have a surface structured by means of grooves extending outwards from the axis of rotation. The rapidly solidified alloy on the cooling rollers or the cooling plates is then subjected to treatment with one or more organic or inorganic bases.

Abstract: The present invention provides a catalyst containing titanium in bonded form, non-crystalline silicon dioxide and at least one crystalline silicate phase which has a zeolite structure, wherein the non-crystalline silicon dioxide is applied to at least one of the crystalline silicate phases which have a zeolite structure and wherein at least one of the crystalline silicate phases which have a zeolite structure contains silicon-carbon bonds with which non-hydrolytically separable organic groups R are bonded to silicon. Furthermore, the present invention provides a process for preparing this catalyst and a process for producing an epoxide from a compound which contains a carbon-carbon double bond (preferably from propene) comprising reacting the compound which contains a carbon-carbon double bond with hydrogen peroxide in the presence of the catalyst according to the invention.

Abstract: The present invention provides a catalyst containing titanium in bonded form, non-crystalline silicon dioxide and at least one crystalline silicate phase which has a zeolite structure, wherein the non-crystalline silicon dioxide is applied to at least one of the crystalline silicate phases which have a zeolite structure and wherein at least one of the crystalline silicate phases which have a zeolite structure contains silicon-carbon bonds with which non-hydrolytically separable organic groups R are bonded to silicon. Furthermore, the present invention provides a process for preparing this catalyst and a process for producing an epoxide from a compound which contains a carbon-carbon double bond (preferably from propene) comprising reacting the compound which contains a carbon-carbon double bond with hydrogen peroxide in the presence of the catalyst according to the invention.

Abstract: The present invention provides a catalyst containing titanium in bonded form, non-crystalline silicon dioxide and at least one crystalline silicate phase which has a zeolite structure, wherein the non-crystalline silicon dioxide is applied to at least one of the crystalline silicate phases which have a zeolite structure and wherein at least one of the crystalline silicate phases which have a zeolite structure contains silicon-carbon bonds with which non-hydrolytically separable organic groups R are bonded to silicon. Furthermore, the present invention provides a process for preparing this catalyst and a process for producing an epoxide from a compound which contains a carbon-carbon double bond (preferably from propene) comprising reacting the compound which contains a carbon-carbon double bond with hydrogen peroxide in the presence of the catalyst according to the invention.

Abstract: The present invention relates to noble metal-containing catalysts which are composed of at least one organic/inorganic hybrid material which is composed of at least one titanium component and at least one Si—H group. The catalysts of the present invention have increased activity compared to known catalysts.

Abstract: A two-stage process for the preparation of organic isocyanates by reacting primary amines with phosgene in which a) in a first stage, amine and phosgene are reacted in an adiabatically managed reaction, in which the temperature of reaction is restricted to values between 100 and 220° C. by actively adjusting the absolute pressure in the reactor to values between 8 and 50 bar by decompression, and the temperature is held at values between 100 and 220° C. until the stoichiometric conversion of phosgene has reached at least 80%, and then b) in a second stage, the reaction mixture from a) is decompressed to an absolute pressure of 1 to 15 bar and the reaction mixture is reacted further at temperatures between 90 and 240° C., optionally with the introduction of heat.

Abstract: The invention relates to a process for the production of Raney nickel catalysts. In this process, the melt of an alloy comprising from 40 to 95 wt. % aluminium, from 5 to 50 wt. % nickel, 0 to 20 wt. % iron, from 0 to 15 wt. % of one or more transition metals selected from the group consisting of cerium, cerium mixed metal, vanadium, niobium, tantalum, chromium, molybdenum and manganese, and, optionally, additional glass-forming elements, is brought into contact with one or more rotating cooling rollers or cooling plates and is allowed to cool and solidify thereon. The cooling rollers have a surface structured by means of transverse grooves, and the cooling plates have a surface structured by means of grooves extending outwards from the axis of rotation. The rapidly solidified alloy on the cooling rollers or the cooling plates is then subjected to treatment with one or more organic or inorganic bases.

Abstract: The present invention provides a catalyst containing titanium in bonded form, non-crystalline silicon dioxide and at least one crystalline silicate phase which has a zeolite structure, wherein the non-crystalline silicon dioxide is applied to at least one of the crystalline silicate phases which have a zeolite structure and wherein at least one of the crystalline silicate phases which have a zeolite structure contains silicon-carbon bonds with which non-hydrolytically separable organic groups R are bonded to silicon. Furthermore, the present invention provides a process for preparing this catalyst and a process for producing an epoxide from a compound which contains a carbon-carbon double bond (preferably from propene) comprising reacting the compound which contains a carbon-carbon double bond with hydrogen peroxide in the presence of the catalyst according to the invention.

Abstract: The present invention provides hydro-oxidation catalysts for the oxidation of hydrocarbons, containing an organic-inorganic hybrid material as well as gold particles and/or silver particles, a process for the production thereof, and the use thereof as a catalyst.

Abstract: This invention relates to a process for the production of a composition containing gold and/or silver particles, mixed oxides containing titanium and silicon which have been surface-modified, to the compositions producible in this process and to the use thereof in processes for the selective oxidation of hydrocarbons in the presence of oxygen and a reducing agent. The catalytically active compositions exhibit constantly high selectivities and productivities.

Abstract: The present invention provides hydro-oxidation catalysts for the oxidation of hydrocarbons, containing an organic-inorganic hybrid material as well as gold particles and/or silver particles, a process for the production thereof, and the use thereof as a catalyst.

Abstract: The present invention provides hydro-oxidation catalysts for the oxidation of hydrocarbons, containing an organic-inorganic hybrid material as well as gold particles and/or silver particles, a process for the production thereof, and the use thereof as a catalyst.

Abstract: The present invention relates to a catalyst containing gold in elemental or bound form and molybdenum in oxidation state +VI, and to a process for the oxidation of a hydrocarbon containing at least one double bond to an epoxide, which process involves reacting the hydrocarbon with oxygen in the presence of hydrogen and in the presence of the catalyst according to the invention.

Abstract: The present invention relates to a process for preparing a composition containing gold and/or silver particles and an amorphous, organic/inorganic titanium/silicon mixed oxide, the compositions which can be prepared by this process and their use as catalysts for the selective oxidation of hydrocarbons.

Abstract: The present invention relates to a process for the production of a dinitronaphthalene isomer mixture, in which naphthalene and/or 1-nitronaphthalene is reacted with nitric acid in the presence of a zeolite.

Abstract: This invention relates to a process for the production of a composition containing gold and/or silver particles, mixed oxides containing titanium and silicon which have been surface-modified, to the compositions producible in this process and to the use thereof in processes for the selective oxidation of hydrocarbons in the presence of oxygen and a reducing agent. The catalytically active compositions exhibit constantly high selectivities and productivities.

Abstract: The present invention relates to the continuous production of nano-scale precious metal particles on SiH-containing support materials, the compositions themselves, and the use of these precious metal-containing compositions as catalyst. The continuous process according to the invention includes impregnating support materials and, after thermal activation, drying the support materials by spraying or by fluidized bed technology leads to form precious metal-containing support compositions that are active in the catalysis of oxidation reactions. The catalytically active precious metal-containing support compositions exhibit high selectivities and productivities and have very long catalyst service lives without deactivation. The invention also relates to a process for the oxidation of hydrocarbons in the presence of oxygen, a reducing agent and the precious-metal containing support compositions of the present invention.

Abstract: The present invention concerns a process for the production of methylenedianiline (MDA) having a high monomer content.