Basf Se Corporation

The Dow Chemical Company

Dow Global Technolgoies LLC

Christian Bartosch

Joaquim Henrique Teles

Philip Kampe

Ulrich Mueller

Kai Gumlich

Richard Jacubinas

Peter Bassler

Meinolf Weidenbach

Andrey Karpov

Juergen Zuehlke

Andrei-Nicolae Parvulescu

Christian Walsdorff

Markus Weber

Dominic Riedel

Hans-Georg Goebbel

Bianca Seelig

Ulrich Müller

Holger Borchert

Daniel Urbanczyk

Marco Bosch

Nicolas Duyckaerts

Ulrike Wegerle

Goetz-Peter Schindler

Götz-Peter Schindler

Marco Oskar Kennema

Miguel Angel Romero Valle

Cornelia Katharina Dobner

Jürgen Zühlke

Thorsten Johann

Natalia Trukhan

Armin Lange De Oliveira

Peter Resch

Werner J Witzl

Hans-Georg Göbbel

Alexander Schroeder

Guido Wasserschaff

Peter Baβler

Thomas Grassler

Joseph John Zakzeski

Soo Yin Chin

Andreas Lehr

Carlos Lizandara Pueyo

Daniela Rieck

Michael Kraemer

Gerhard Krennrich

Martin Cogswell

Mauricio Grobys

Christian Almer

Alexander SCHRÖDER

Jürgen ZÜHLKE

Peter BAßler

Thomas Graßler

A process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising: directing a feed comprising gaseous ethylene and gaseous oxygen through a packing of individual shaped catalyst bodies, under conditions conducive to obtain a reaction mixture containing at least 2.7 vol.-% of ethylene oxide, wherein each shaped catalyst body comprises silver deposited on a refractory support and is characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a BET surface area in the range of 1.6 to 3.0 m/g; a first face side surface, a second face side surface and a circumferential surface with a plurality of passageways extending from the first face side surface to the second face side surface; and a uniform multilobed cross-section; and a longest direct diffusion pathway d, with 2being in the range of 0.7 to 2.4 mm, wherein the longest diffusion pathway d is defined as the shortest distance from the geometric surface of the shaped catalyst body to a point inside the structure of the shaped catalyst body for which point the shortest distance is the largest among all points. The process allows for increased activity and/or stability of the catalyst while maintaining or increasing selectivity at high productivity.

Process for producing ethylene oxide by gas-phase oxidation of ethylene

A shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene, comprising silver deposited on a porous refractory support, the shaped catalyst body having a first face side surface, a second face side surface and a circumferential surface, characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a multilobe structure; a plurality of passageways extending from the first face side surface to the second face side surface, outer passageways being arranged around a central passageway with one outer passageway being assigned to each lobe, wherein neighboring outer passageways are arranged essentially equidistantly to each other and the outer passageways are arranged essentially equidistantly to the central passageway; a minimum wall thickness A between two neighboring passageways in the range of 0.6 to 1.3 mm; a minimum wall thickness B between each outer passageway and the circumferential surface in the range of 1.1 to 1.8 mm; and a BET surface area in the range of 1.6 to 3.0 m/g. The shaped catalyst bodies allow for a favorable balance between mechanical stability, pressure drop and selectivity. The invention also relates to a process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising reacting ethylene and oxygen in the presence of a shaped catalyst body as defined above. The invention further relates to a process for preparing a shaped catalyst body as above, comprising i) impregnating a refractory support having a BET surface area in the range of 1.4 to 2.5 m/g with a silver impregnation solution; and ii) subjecting the impregnated refractory support to a calcination process; wherein steps i) and ii) are optionally repeated.

Catalyst for producing ethylene oxide by gas-phase oxidation

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.

Catalyst for the oxidation of ethylene to ethylene oxide

The present invention relates to a process for the regeneration of a catalyst comprising a titanium-containing zeolite, said catalyst having been used in a process for the preparation of an olefin oxide and having phosphate deposited thereon, said process for the regeneration comprising the steps: (a) separating the reaction mixture from the catalyst, (b) washing the catalyst obtained from (a) with liquid aqueous system; (c) optionally drying the catalyst obtained from (b) in a gas stream comprising an inert gas at a temperature of less than 300&#xb0; C.; (d) calcining the catalyst obtained from (c) in a gas stream comprising oxygen at a temperature of at least 300&#xb0; C.

Regeneration of a titanium containing zeolite

A continuous process for the preparation of propylene oxide, comprising (i) providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, water, optionally propane, and at least one dissolved potassium salt of a phosphorus oxyacid wherein the molar ratio of potassium relative to phosphorus in the at least one potassium salt of a phosphorus oxyacid is in the range of from 0.6 to 1.4; (ii) passing the liquid feed stream provided in (i) into an epoxidation reactor comprising a catalyst comprising a titanium zeolite of structure type MWW comprising zinc, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation reactor, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the at least one dissolved potassium salt of a phosphorus oxyacid, optionally propene, and optionally propane; (iii) removing an effluent stream from the epoxidation reactor, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the at least one dissolved potassium salt of a phosphorus oxyacid, optionally propene, and optionally propane.

Process for preparing propylene oxide

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.

Catalyst for the epoxidation of alkenes

A process for producing propylene oxide comprising reacting propene with hydrogen peroxide in the presence of a catalyst to give a mixture (G1) comprising propylene oxide, unreacted propene, and oxygen; separating propylene oxide from mixture (G1) to give a mixture (GII) comprising propene and oxygen; and adding hydrogen to mixture (GII) and reducing the oxygen comprised in mixture (GII) at least partially by reaction with hydrogen in the presence of a catalyst comprising copper in elemental and/or oxidic form on a support, wherein copper is present on the support in an amount of 30 to 80 wt.-% based on the whole catalyst and calculated as CuO.

Process for producing propylene oxide

A continuous process for the production of propylene oxide comprising reacting propene with hydrogen peroxide in methanolic solution in the presence of a titanium silicalite-1 catalyst to obtain propylene oxide, wherein a reaction feed comprising propene, methanol and hydrogen peroxide is introduced into a reactor, said reaction feed containing potassium cations and phosphorus in the form of anions of at least one phosphorus oxyacid.

Process for the production of propylene oxide

A method for separating acetonitrile from water, comprising (i) providing a stream Scontaining at least 95 wt.-%, based on the total weight of S, acetonitrile and water, wherein the weight ratio of acetonitrile: water is greater than 1; (ii) adding a stream P, comprising at least 95 wt.-% C3, based on the total weight of stream P, to Sto obtain a mixed stream S, C3 being propene optionally admixed with propane with a minimum weight ratio of propene: propane of 7:3; (iii) subjecting Sto a temperature of 92&#xb0; C. at most and a pressure of at least 10 bar, obtaining a first liquid phase Lessentially consisting of C3, acetonitrile, and water, and a second liquid phase Lessentially consisting of water and acetonitrile wherein the weight ratio of acetonitrile: water in Lis less than 1; (iv) separating Lfrom L

Method for the separation of acetonitrile from water

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Mannheim, Germany

Christian Bartosch