Abstract:
A process for preparing C 1 -C 10 -aldehydes by oxidative dehydrogenation of C 1 -C 10 -alcohols over a shaped catalyst body obtainable by three-dimensional forming and/or arrangement in the space of silver-containing fibres and/or filaments, characterized in that the mean diameter or the mean diagonal length of an essentially rectangular or square cross section of these silver-containing fibres and/or filaments is in the range from 30 µm to 200 µm.
Abstract:
Disclosed a shaped catalyst body for preparing ethylene oxide, which comprises at least silver and rhenium applied to an alumina support, and also a process for producing it, wherein the alumina support has the geometry of a hollow cylinder and the shaped catalyst body has a rhenium content C R and C R /ppm by weight, based on the wall thickness of the hollow cylinder d w in mm, and calculated as element, in the range 120≤C R /d w ≤200.
Abstract:
The present invention relates to a method for producing hydrocarbons from methane, characterized in that in a first step (i) methane is reacted to give ethylene and in a later step (ii) the product mixture obtained in step (i) containing ethylene and methane is reacted to give superior hydrocarbons. The present invention further relates to a system for producing hydrocarbons from methane, characterized in that several system units are arranged one after the other in a row in a single system line, comprising: - a first reactor A for carrying out a reaction from methane to ethylene - a second reactor B for carrying out a reaction from ethylene to superior hydrocarbons.
Abstract:
The invention relates to a method for producing a catalyst comprising 0.05 - 0.25 wt % of noble metal, preferably for the oxidative dehydration of olefinically unsaturated alcohols, comprising the following steps: a) generating a direct current plasma, b) introducing metal and carrier material into the plasma, c) vaporizing metal and carrier material in the plasma or "blasting" the solid body of metal and carrier material in the plasma, and reacting the particles, d) cooling, wherein very small particles of composite material are obtained, and e) applying the composite material to the actual catalyst carrier. The invention further relates to a correspondingly produced catalyst, and to the use thereof.
Abstract:
Catalyst for the production of ethylene oxide, at least comprising silver applied to a carrier, said carrier having a BET constant ranging from 0 to 800 as per DIN ISO 9277.
Abstract:
Method for producing a catalyst that is used for the production of ethylene oxide and comprises silver and zinc applied to a carrier, said method at least including the steps of (i) providing a carrier, (ii) applying 10 ppm to 1500 ppm of zinc to the carrier from step (i) by bringing the carrier in contact with at least one mixture G1 comprising at least one zinc compound, the amount of applied zinc being calculated as an element and relative to the total weight of the carrier from step (i), (iii) drying and/or calcining the carrier obtained in step (ii), (iv) applying silver to the dry and/or calcined carrier by bringing the carrier in contact with at least one mixture G2 comprising at least one silver compound.
Abstract:
Proposed is a process for preparing isocyanates by dissociating the corresponding carbamates, which is characterized in that the carbamates are dissociated in the presence of a heterogeneous Lewis-acidic catalyst.