Abstract: The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.

Abstract: A catalyst bed contains one or more segments of monolithic catalyst, wherein the monolithic catalyst includes a mono-lithic honeycomb structure and a layer of catalyst coating the honeycomb structure; the honeycomb structure contains a plurality of channels aligned side by side; and each channel includes an inlet positioned at a first terminus of the channel, an outlet positioned at a second terminus of the channel, and openings positioned along the channel in the direction of fluid flow through the channel for transverse fluid flow in and/or out of the channel.

Abstract: The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.

Abstract: A method for preparing a silver impregnation solution comprises (a) charging a neutralization reactor R1 with an aqueous organic amine; (b) adding oxalic acid powder through a first feeding conduit to the neutralization reactor R1 to obtain an aqueous oxalic acid-organic amine solution; (c) directing the aqueous oxalic acid-organic amine solution from the neutralization reactor to a complexation reactor R2; (d) adding particulate silver oxide through a second feeding conduit to the complexation reactor R2 to obtain a silver impregnation solution; and, optionally, (e) subjecting the silver impregnation solution to filtration. The silver impregnation solution is used for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide. The method allows for the preparation of a silver impregnation solution in an efficient and occupationally and environmentally safe way.

Abstract: Process for the preparation of alpha, beta unsaturated aldehydes by oxidation of alcohols in the presence of a liquid phase wherein the liquid phase contains 0.1 to less than 25 weight-% water and wherein the liquid phase contains at least 25 weight-% of alcohol(s) of general formula (II) and alpha, beta unsaturated aldehyde(s) of general formula (I) and wherein the oxidant is oxygen and/or hydrogen peroxide.

Abstract: The invention relates to a silver-comprising catalyst system for the preparation of aldehydes and/or ketones by oxidative dehydrogenation of alcohols, in particular the oxidative dehydrogenation of methanol to form formaldehyde, comprising a first catalyst layer and a second catalyst layer, wherein the first catalyst layer consists of a silver-comprising material in the form of balls of wire, gauzes or knitteds having a weight per unit area of from 0.3 to 10 kg/m2 and a wire diameter of from 30 to 200 ?m and the second catalyst layer consists of a silver-comprising material in the form of granular material having an average particle size of from 0.5 to 5 mm and the two catalyst layers are in direct contact with one another. The invention further relates to a corresponding process for the preparation of aldehydes and/or ketones, in particular of formaldehyde, by oxidative dehydrogenation of corresponding alcohols over a silver-comprising catalyst system.

Abstract: Process for the preparation of alpha, beta unsaturated aldehydes by oxidation of alcohols in the presence of a liquid phase wherein the liquid phase contains 0.1 to less than 25 weight-% water and wherein the liquid phase contains at least 25 weight-% of alcohol(s) of general formula (II) and alpha, beta unsaturated aldehyde(s) of general formula (I) and wherein the oxidant is oxygen and/or hydrogen peroxide.

Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.

Abstract: The present invention relates to a catalyst for the epoxidation of alkenes, comprising silver, rhenium, cesium, lithium, tungsten and sulfur on a support. The present invention further relates to a process for producing the catalyst and the use of the catalyst for the oxidation of alkylenes to alkylene oxides. In addition, the present invention relates to a process for preparing ethylene oxide from ethylene, which comprises the oxidation of ethylene with oxygen in the presence of said catalyst.

Abstract: A process for separating water from pyrolysis gasoline obtained from a steam cracking step uses a coalescer for the water separation. And a device comprises a coalescer for water separation from pyrolysis gasoline.

Abstract: A process for separating water from pyrolysis gasoline obtained from a steam cracking step uses a coalescer for the water separation. And a device comprises a coalescer for water separation from pyrolysis gasoline.

Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.

Abstract: A process for separating water from pyrolysis gasoline obtained from a steam cracking step uses a coalescer for the water separation. And a device comprises a coalescer for water separation from pyrolysis gasoline.

Abstract: Zeolite material of the pentasil type has an alkali metal and alkaline earth metal content of not more than 100 ppm and a molar ratio of Si to Al of from 250 to 1500, at least 90% of the primary particles of the zeolite material being spherical and 95% by weight of the spherical primary particles having a diameter of less than or equal to 1 ?m.

Abstract: A method for enhanced oil recovery, comprising selecting a target reservoir comprising hydrocarbons; inputting a plurality of parameters concerning the reservoir and the hydrocarbons into a simulator; and modeling an enhanced oil recovery technique with the simulator using dynamic local grid refinement to provide additional model resolution of a front between an enhanced oil recovery injectant and the hydrocarbons.

Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.

Abstract: Zeolite material of the pentasil type has an alkali metal and alkaline earth metal content of not more than 100 ppm and a molar ratio of Si to Al of from 250 to 1500, at least 90% of the primary particles of the zeolite material being spherical and 95% by weight of the spherical primary particles having a diameter of less than or equal to 1 ?m.

Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.

Abstract: Zeolite material of the pentasil type has an alkali metal and alkaline earth metal content of not more than 100 ppm and a molar ratio of Si to Al of from 250 to 1500, at least 90% of the primary particles of the zeolite material being spherical and 95% by weight of the spherical primary particles having a diameter of less than or equal to 1 ?m.

Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.