Abstract:
The invention relates to a method for the aromatisation of non-aromatic hydrocarbons with 6 or more carbon atoms in the presence of water vapour and a catalyst that contains a support comprising zirconium oxide, in addition to tin and platinum in a ratio of at least 1. The invention also relates to the aforementioned catalyst.
Abstract:
The invention relates to a method for the dealkylation of alkyl-substituted aromatic hydrocarbons, such as for example toluol or other monoalkyl- or polyalkyl-substituted benzols or higher aromatics, to obtain benzol with the aid of water vapour in the presence of a catalyst that contains a support comprising zirconium oxide and rhodium. The invention also relates to the aforementioned catalyst.
Abstract:
The invention relates to a method for dealkylating alkyl-substituted aromatic hydrocarbons with the aid of water vapour in the presence of a dealkylation catalyst, by means of a gas containing oxygen.
Abstract:
The invention relates to a method for carrying out in a stable manner a continuous process for continuously producing acrolein or acrylic acid or the mixture thereof from propane consisting in using a fresh propane supply flow in the form of a regulation variable for a stable and stationary operation
Abstract:
The invention concerns a method for producing propene from propane, said method consisting in: A) preparing an input gas stream (a) containing propane; B) introducing the input gas stream (a), containing propane, optionally water vapour and optionally an oxygen-containing gas stream, into a dehydrogenation zone then dehydrogenating propane to form propene, a product gas stream (b), containing propane, propene, methane, ethane, ethene, nitrogen, carbon monoxide, carbon dioxide, water vapour, optionally hydrogen and optionally oxygen, being obtained; C) cooling and optionally compressing the product gas stream (b) then separating water vapour by condensing a product gas stream (c) depleted in water vapour (c) being obtained; D) separating the non-condensable gas constituents or with low boiling point by contacting the product gas stream (c) with an inert absorbent then by desorbing the gases dissolved in said inert absorbent, a C 3 hydrocarbon stream (d1) and a residual gas stream (d2) containing methane, ethane, ethene, nitrogen, carbon monoxide, carbon dioxide, optionally hydrogen and optionally oxygen, being obtained; E) cooling and optionally compressing the C 3 hydrocarbon stream (d1), a gaseous or liquid C 3 hydrocarbon stream (e1) being obtained; F) optionally introducing the C 3 hydrocarbon stream (e1) into a first distillation zone then separating same by distillation into a propane and propene stream (f1) and a stream (f2) containing ethane and ethene; G) introducing the stream (e1) or (f1) into a (second) distillation zone then separating by distillation into a propene stream (g1) and a propane stream (g2), the stream (g2) being recycled at least partly to the dehydrogenation zone.
Abstract:
Disclosed is a method for producing at least one partial propylene oxidation and/or ammoxidation product, according to which the propylene is produced from raw propane by means of dehydration and is subjected to a heterogeneously catalyzed partial gas phase oxidation and/or partial gas phase ammoxidation in the presence of unreacted propane as a component of a gas mixture 2 containing
Abstract:
A process for the long-term operation of a continuously operated heterogeneous catalyzed partial dehydrogenation of a hydrocarbon to be dehydrogenated, in which a stream of reaction gas mixture containing the hydrocarbon to be dehydrogenated in a molar starting amount HC is passed through a total catalyst bed containing the total amount M of dehydrogenation catalyst and deactivation of the total catalyst bed is counteracted by, as the period of operation increases, the conversion contribution of the first third in the flow direction of the total amount M of dehydrogenation catalyst decreasing, the conversion contribution of the last third in the flow direction of the total amount M of dehydrogenation catalyst increasing and the conversion contribution of the second third in the flow direction of the total amount M of dehydrogenation catalyst going through a maximum.
Abstract:
The invention relates to a method for producing aromatic hydrocarbons from a C 1 -C 4 alkane or a mixture of C 1 -C 4 alkanes. Said method is characterized in that a) an educt flow A containing a C 1 -C 4 alkane or a mixture of C 1 -C 4 alkanes is brought in contact with a catalyst, and some of the C 1 -C 4 alkane or some of the mixture of C 1 -C 4 alkanes is reacted to aromatic hydrocarbon/s, b) the product flow B resulting from step a) is separated into a low-boiling flow C containing the main portion of the hydrogen and the non-reacted C 1 -C 4 alkane or mixture of C 1 -C 4 alkanes, and a high-boiling flow D or several high-boiling flows D' containing the main portion of the obtained aromatic hydrocarbon, and c) the low-boiling flow C is fed to another process consuming C 1 -C 4 alkane, the hydrogen contained in the low-boiling flow C being optionally eliminated beforehand.
Abstract:
The invention relates to a catalyst support and to catalysts comprising said support and having a defined tortuosity. The invention also relates to the use thereof for heterogeneous catalytic hydrogenation processes of hydrocarbons.
Abstract:
The invention relates to a method for hydrocyanation of 1,3-butadiene on at least one nickel(o) complex with phosphor-containing ligands as a catalyst, wherein 1,3-butadiene is used in a mixture with n-butane and the mixture contains 60 - 90 vol. % 1,3-butadiene and 40 -10 vol. % n-butane.