Basf Se Corporation

Guido Wasserschaff

Stephan Andreas Schunk

Thomas Roussiere

Andrian Milanov

Andreas Strasser

Ekkehard Schwab

Gerhard Cox

Grigorios Kolios

Marco Bosch

Andrey Karpov

Andreas Bode

Dirk Klingler

Matthias Kern

Rene Koenig

Christian Bartosch

Bernd Zoels

Claudia Querner

Jens Bernnat

Bernd Hinrichsen

Friedrich Glenk

Juergen Zuehlke

Carlos Lizandara Pueyo

Sabine Schmidt

Carlos Lizandara

Michael Kraemer

Ulrich Floerchinger

Thomas ROUSSIÈRE

Robert MÜLLER

Rene KÖNIG

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

A hexaaluminate-containing catalyst containing a hexaaluminate-containing phase which includes cobalt and at least one further element of La, Ba or Sr. The catalyst contains 2 to 15 mol % Co, 70 to 90 mol % Al, and 2 to 25 mol % of the further element of La, Ba or Sr. In addition to the hexaaluminate-containing phase, the catalyst can include 0 to 50% by weight of an oxidic secondary phase. The process of preparing the catalyst includes contacting an aluminum oxide source with cobalt species and at least with an element from the group of La, Ba and Sr. The molded and dried material is preferably calcined at a temperature greater than or equal to 800&#xb0; C. In the reforming process for reacting hydrocarbons in the presence of CO, the catalyst is used at a process temperature of greater than 700&#xb0; C., with the process pressure being greater than 5 bar.

Hexaaluminate-comprising catalyst for the reforming of hydrocarbons and a reforming process

The invention relates to a process for the parallel preparation of hydrogen, carbon monoxide and a carbon-comprising product, wherein one or more hydrocarbons are thermally decomposed and at least part of the pyrolysis gas formed is taken off from the reaction zone of the decomposition reactor at a temperature of from 800 to 1400&#xb0; C. and reacted with carbon dioxide to form a gas mixture comprising carbon monoxide and hydrogen (synthesis gas).

Parallel preparation of hydrogen, carbon monoxide and a carbon-comprising product

A hexaaluminate-containing catalyst for reforming hydrocarbons. The catalyst consists of a hexaaluminate-containing phase, which consists of cobalt and at least one further element from the group consisting of La, Ba, and Sr, and an oxidic secondary phase. To prepare the catalyst, an aluminum source is brought into contact with a cobalt-containing metal salt solution, dried, and calcined. The metal salt solution additionally contains the at least one further element. The reforming of methane and carbon dioxide is great economic interest since synthesis gas produced during this process can form a raw material for the preparation of basic chemicals. In addition, the use of carbon dioxide as a starting material is important in the chemical syntheses in order to bind carbon dioxide obtained as waste product in numerous processes by a chemical route and thereby avoid emission into the atmosphere.

The invention relates to a nickel hexaaluminate-comprising catalyst for reforming hydrocarbons, preferably methane, in the presence of carbon dioxide, which comprises hexaaluminate in a proportion in the range from 65 to 95% by weight, preferably from 70 to 90% by weight, and a crystalline, oxidic secondary phase selected from the group consisting of LaAlO, SrAlOand BaAlOin the range from 5 to 35% by weight, preferably from 10 to 30% by weight. The BET surface area of the catalyst is &#x2267;5 m/g, preferably &#x2267;10 m/g. The molar nickel content of the catalyst is &#x2266;3 mol %, preferably &#x2266;2.5 mol % and more preferably &#x2266;2 mol %. The interlayer cations are preferably Ba and/or Sr. The process for producing the catalyst comprises the steps: (i) production of a mixture of metal salts, preferably nitrate salts of Ni and also Sr and/or La, and a nanoparticulate aluminum source, (ii) molding and (iii) calcination. The catalyst of the invention is brought into contact with hydrocarbons, preferably methane, and COin a reforming process, preferably at a temperature of &#x3e;800&#xb0; C. The catalyst is also distinguished by structural and preferred properties of the nickel, namely that the nickel particles mostly have a tetragonal form and the particles have a size of &#x2266;50 nm, preferably &#x2266;40 nm and particularly preferably &#x2266;30 nm, and are present finely dispersed as grown-on hexaaluminate particles. The catalyst has only a very low tendency for carbonaceous deposits to be formed.

Nickel hexaaluminate-containing catalyst for reforming hydrocarbons in the presence of carbon dioxide

The present invention relates to a process for producing a catalyst for the reforming of hydrocarbons, preferably methane, in the presence of CO, water and/or hydrogen. The production of the catalyst is based on contacting of a hydrotalcite-comprising starting material with a fusible metal salt. The compounds which have been brought into contact with one another are intimately mixed and treated thermally, resulting in the fusible metal salt forming a melt. After molding, the material is subjected to a high-temperature calcination step. The metal salt melt comprises at least one metal selected from the group consisting of K, La, Fe, Co, Ni, Cu and Ce, preferably Ni. The metal salt melt more preferably comprises nickel nitrate hexahydrate. In addition, the invention relates to the use of the catalyst of the invention for the reforming of hydrocarbons, preferably methane, in the presence of CO, water and/or hydrogen at elevated pressures which are greater than 5 bar, preferably greater than 10 bar, particularly preferably greater than 20 bar. The catalyst according to the invention is distinguished from the prior art by particular, preferred physicochemical properties.

Process for producing a reforming catalyst and the reforming of methane

The present invention relates to a process for producing a catalyst for carrying out methanation reactions. The production of the catalyst is based on contacting of a hydrotalcite-comprising starting material with a fusible metal salt. The compounds brought into contact with one another are intimately mixed, thermally treated so that the metal salt fraction melts and subsequently subjected to a low-temperature calcination step and a high-temperature calcination step. The metal salt melt comprises at least one metal selected from the group consisting of K, La, Fe, Co, Ni, Cu and Ce, preferably Ni. The metal salt melt more preferably comprises/contains nickel nitrate hexahydrate. The hydrotalcite-comprising starting material is preferably hydrotalcite or a hydrotalcite-like compound as starting material, and the hydrotalcite-comprising starting material preferably comprises magnesium and aluminum as metal species. The catalyst of the invention is preferably used for carrying out methanation reactions at elevated pressures (from 10 to 50 bar) and elevated temperatures.

Process for producing a methanation catalyst and a process for the methanation of synthesis gas

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Neckargemuend, Germany

Guido Wasserschaff