Basf Se Corporation

Cornelia Katharina Dobner

Frank Rosowski

Josef Macht

Ulrich Hammon

Christian Walsdorff

Hagen Wilmer

Jürgen Zühlke

Cathrin Alexandra Welker-Nieuwoudt

Klaus Joachim Mueller-Engel

Torsten Mäurer

Andrey Karpov

Tobias Rosendahl

Holger Borchert

Hans-Martin Allmann

Stefan Altwasser

Thomas Lautensack

Johanna Wanka

Klaus Joachim Müller-Engel

Andreas Raichle

Marco Bosch

Ulrich Cremer

Marco Hartmann

Catharina Horstmann

Christian Bartosch

Bastian Ewald

Kazuhiko Amakawa

Thomas Geiger

Robert Schloegl

Juergen Zuehlke

Andreas Lehr

Achim Gritsch

Joseph John Zakzeski

Stefan Lipp

Hao Chen

Christine Schmitt

Mark Eichelbaum

Annettte Trunschke

Philipp Gruene

Multimetal oxide composition comprising Mo, Bi, Fe, Cu and one or more than one of the elements Co and Ni and use thereof.

Multimetal oxide compositions comprising Mo, Bi, Fe and Cu

The invention relates to a catalyst molded body for preparing maleic anhydride by gas-phase oxidation of a hydrocarbon having at least four carbon atoms using a catalytically active composition containing vanadium, phosphorus and oxygen. The shaped catalyst body has an essentially cylindrical body having a longitudinal axis. The cylindrical body has at least two parallel internal holes which are essentially parallel to the cylinder axis of the body and go right through the body. The catalyst molded body has a large outer surface area, a lower pressure loss and sufficient mechanical stability.

Catalyst and method for producing maleic anhydride

The invention relates to an oxidation catalyst comprising at least one inorganic, oxidic or ceramic, shaped support body having a BET surface area of less than 0.5 m/g, based on the support, which is at least partly coated with a catalytically active multielement oxide, the catalyst being precious metal-free and the shaped support body having the form of a saddle whose saddle surface is curved oppositely in the two principal directions, to a process for producing it, to its use in various catalytic gas phase oxidations, and to corresponding processes for catalytic gas phase oxidation.

Oxidation catalyst with saddle-shaped support body

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 hollow cylindrical shaped catalyst body for gas phase oxidation of an alkene to an &#x3b1;,&#x3b2;-unsaturated aldehyde and/or an &#x3b1;,&#x3b2;-unsaturated carboxylic acid comprises a compacted multimetal oxide having an external diameter ED, an internal diameter ID and a height H, wherein ED is in the range from 3.5 to 4.5 mm; the ratio q=ID/ED is in the range from 0.4 to 0.55; and the ratio p=H/ED is in the range from 0.5 to 1. The shaped catalyst body is mechanically stable and catalyzes the partial oxidation of an alkene to the products of value with high selectivity. It provides a sufficiently high catalyst mass density of the catalyst bed and good long-term stability with acceptable pressure drop.

Mechanically stable hollow cylindrical shaped catalyst bodies for gas phase oxidation of an alkene to an unsaturated aldehyde and/or an unsaturated carboxylic acid

Process for preparing a vinylidenecarboxylic acid or ester thereof, wherein a reaction gas comprising gaseous formaldehyde, molecular oxygen and an alkycarboxylic acid or ester thereof is brought into contact with a solid catalyst whose active composition comprises a vanadium-phosphorus oxide having an average oxidation state of vanadium of from +4.40 to +5.0 to give a product gas comprising the vinylidenecarboxylic acid or ester thereof.

Process for preparing vinylidenecarboxylic acid (ester)s by reaction of formaldehyde with alkylcarboxylic acid (ester)s

What is described is a catalyst for preparation of an &#x3b1;,&#x3b2;-unsaturated carboxylic acid by gas phase oxidation of an &#x3b1;,&#x3b2;-unsaturated aldehyde, comprising a shaped support body with an active composition applied thereto, wherein the active composition coverage q is at most 0.3 mg/mm, where Q is the active composition content of the catalyst in % by weight and Sis the specific geometric surface area of the shaped support body in mm/mg. Also described are a process for preparing the catalyst and a process for preparing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid by gas phase oxidation of an &#x3b1;,&#x3b2;-unsaturated aldehyde over a fixed catalyst bed comprising a bed of the catalyst. The catalyst, with constantly high conversion of acrolein, reduces overoxidation to COand increases the selectivity of acrylic acid formation.

Catalyst for preparation of an unsaturated carboxylic acid by gas phase oxidation of an unsaturated aldehyde

Process for producing a supported silver catalyst, which comprises (a) reacting oxalic acid with an alkali metal base in a solvent, preferably water, to the second equivalence point of oxalic acid to give alkali metal oxalate; (b) reacting the alkali metal oxalate obtained according to (a) with silver salt in a solvent, preferably water, to give silver oxalate; (c) forming a complexation of the silver oxalate obtained according to (b) with a diamine compound in a solvent, preferably water, to give a diamine-silver oxalate complex.

Process for producing a supported silver catalyst

An &#x3b1;,&#x3b2;-unsaturated aldehyde and/or an &#x3b1;,&#x3b2;-unsaturated carboxylic acid are prepared by gas phase oxidation of alkene with molecular oxygen over a fixed catalyst bed comprising a bed of hollow cylindrical shaped catalyst bodies having a multimetal oxide active composition. The fixed catalyst bed comprises at least three successive reaction zones; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor outlet; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor inlet; and the value WT=(ED&#x2212;ID)/2 in the reaction zone in which the highest local temperature in the fixed catalyst bed occurs is lower than in the other reaction zones, in which ED is the external diameter and ID is the internal diameter of the shaped catalyst body. The yield of the products of value is enhanced in this way.

Process for preparing an unsaturated aldehyde and/or an unsaturated carboxylic acid

An eggshell catalyst consisting of a hollow cylindrical support body of length 2 to 10 mm, external diameter 4 to 10 mm and wall thickness 1 to 4 mm, and an eggshell, applied to the outer surface of the support body, of catalytically active oxide material of the general formula I,MoVWCuXXO&#x2003;&#x2003;(I)in which the variables are each defined as follows:

Eggshell catalyst consisting of a hollow cylindrical support body and a catalytically active oxide material applied to the outer surface of the support body

The invention relates to a catalyst molded body for preparing maleic anhydride by gas-phase oxidation of a hydrocarbon having at least four carbon atoms using a catalytically active composition contains vanadium, phosphorus and oxygen, where the shaped catalyst body has an essentially cylindrical body having a longitudinal axis, wherein the cylindrical body has at least two parallel internal holes which are essentially parallel to the cylinder axis of the body and go right through the body. The catalyst molded body has a large outer surface area, a lower pressure loss and sufficient mechanical stability.

The present invention relates to a process for gas-phase oxidation, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed through two or more catalyst zones. Furthermore, the present invention relates to a catalyst system for gas-phase reaction using a preliminary zone.

Catalyst system and method for gas phase oxidation using an upstream layer

A process for producing a catalytically active composition being a mixture of a multielement oxide comprising the elements Mo and V and at least one oxide of molybdenum, in which spray drying of an aqueous solution or of an aqueous suspension of starting compounds comprising the elements of the multielement oxide produces a spray powder P, a pulverulent oxide of molybdenum and optionally shaping assistants are added thereto, shaped bodies are shaped from the resulting mixture and these are converted to the catalytically active composition by thermal treatment.

Process for producing a catalytically active composition being a mixture of a  multielement oxide comprising the elements Mo and V and at least one oxide of molybdenum

The present invention relates to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver and rhenium applied to an alumina support, and also to a process for producing it, wherein the alumina support has the geometry of a hollow cylinder and the shaped catalyst body has a rhenium content Cand C/ppm by weight, based on the wall thickness of the hollow cylinder din mm, and calculated as element, in the range 120&#x2266;C/d&#x2266;200.

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Ludwigshafen, Germany

Cornelia Katharina Dobner