Abstract:
The present invention relates to a shell catalyst, comprising an active metal selected from the group of ruthenium, rhodium, palladium, platinum, and mixtures thereof, applied to a carrier material comprising silicon dioxide, wherein the pore volume of the carrier material is 0.6 to 1.0 ml/g, determined by Hg porosimetry, the BET surface area is 280 to 500 m2/g, and at least 90% of the pores present comprise a diameter from 6 to 12 nm, to a method for producing said shell catalyst, to a method for hydrogenating an organic compound comprising at least one hydrogenatable group using the shell catalyst, and to the use of the shell catalyst for hydrogenating an organic compound.
Abstract:
The invention relates to a method for hydrocarbon conversion in the presence of an acidic ionic liquid. The hydrocarbon conversion is preferably an isomerization, in particular an isomerization of methylcyclopentane (MCP) to form cyclohexane. Before the hydrocarbon conversion, a hydrogenation is performed. Preferably, benzene is hydrogenated to form cyclohexane. The cyclohexane arising in the hydrogenation and/or isomerization is preferably isolated from the method. In a preferred embodiment of the invention, low boilers, in particular C5-C6 alkanes such as cyclopentane or isohexanes, are removed by distillation from the hydrocarbon mixture used for the hydrocarbon conversion after the hydrogenation and before the hydrocarbon conversion.
Abstract:
The present invention relates to a process for the preparation of 4-cyclohexyl-2-methyl-2-butanol. The process involves the following steps: a) reaction of styrene with isopropanol at elevated temperature, giving 4-phenyl-2-methyl-2-butanol, and b) heterogeneous-catalytic hydrogenation of 4-phenyl-2-methyl-2-butanol over a catalyst suitable for the ring hydrogenation of aromatics.
Abstract:
The invention relates to a method for hydrogenating aromatic compounds with hydrogen in the presence of a catalyst containing ruthenium on a zirconium oxide support material. The invention also relates to the use of a catalyst containing ruthenium on a zirconium oxide support material for hydrogenating aromatic compounds.
Abstract:
The invention relates to a method for producing cyclohexane by isomerizing a hydrocarbon mixture (KG1) containing methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. A flow (S1) originating from a steam cracking process is used as a starting material. The hydrocarbon mixture (KG1) is obtained from said stream (S1) in a device for removing aromatics. The hydrocarbon mixture has a reduced aromatic content in comparison with the flow (S1). (KG1) can also be (nearly) free of aromatics. In dependence on the type and amount of the aromatics remaining in the hydrocarbon mixture (KG1), in particular if benzene is present, a hydrogenation of (KG1) additionally can be performed before the isomerization. Furthermore, additional purification steps can optionally be performed before or after the isomerization or hydrogenation in dependence on the presence of other components of (KG1). Preferably high-purity cyclohexane (in accordance with specifications) is isolated from the hydrocarbon mixture (KG2) arising during the isomerization, wherein the specifications are given, for example, by the use of the cyclohexane for the production of caprolactam known to the person skilled in the art.
Abstract:
The invention relates to a method for producing 4-isopropylcyclohexylmethanol (IPCHM) from para-cymene. The method for producing 4-isopropylcyclohexylmethanol (IPCHM) comprises an electrochemical method for producing a mixture of 4-isopropylbenzaldehyddimethylacetal and 4-(1-alkoxy-1-methyl-ethyl)-benzaldehyddimethylacetal and intermediates thereby passing through, a hydrolysis step for forming the corresponding benzaldehydes, and a hydrating of said mixture, forming 4-isopropylcyclohexylmethanol (IPCHM).
Abstract:
Procedimiento continuo para la preparación de al menos un ácido ciclohexanopolicarboxílico o un derivado del mismo, mediante puesta en contacto de al menos un ácido bencenopolicarboxílico correspondiente o un derivado del mismo con un gas que contiene hidrógeno, en presencia de al menos un catalizador de concha que contiene un metal activo elegido de entre el grupo consistente en rutenio, rodio, paladio, platino y mezclas de ellos, aplicado sobre un material de soporte que contiene dióxido de silicio, en el que el volumen de poro del material de soporte es de 0,6 a 1,0 ml/g, determinado mediante porosimetría de Hg, la superficie BET es de 280 a 500 m2/g, por lo menos 90% de los poros presentes exhibe un diámetro de 6 a 12 nm, y 40 a 70 % en peso del metal activo, referido a la cantidad total de metal activo, está presente en la concha del catalizador hasta una profundidad de penetración de 200 μm, caracterizado porque la puesta en contacto ocurre a una velocidad de tubo vacío de 20 a 50 m/h, en el que 10 el al menos un derivado del ácido bencenopolicarboxílico es un mono-, di-, tri-, tetraéster y anhídrido del ácido bencenopolicarboxílico.
Abstract:
La presente invención se refiere a un proceso para preparar 4-isopropilciclohexilmetanol (IPCHM) de para-cimeno. El proceso para preparar 4-sopropiIciclohexilmetanol (IPCHM) comprende un proceso electroquímico para preparar una mezcla de acetal 4-isopropilbenzaldehído dimetílico y acetal 4-(1-alcoxi-1-rnetilet il)benzaldehído dimetílico y los intermediarios pasaron por el procesos, un paso de hidrólisis para formar los benzaldehídos correspondientes y una hidrogenación de esta mezcla para formar 4-isopropilciclohexilmetanol (IPCHM).