Sud-Chemie Ag

Sued-Chemie Catalysts Italia S.rl.

Sud-Chemie Catalysts Italia S.r.l.

Sued-Chemie IP Gmbh & Co. Kg

Süd-Chemie IP Gmbh & Co Kg

Clariant Prodotti (Italia) Spa

Marvin Estenfelder

Alberto Cremona

Christian Guckel

Christian Gückel

Edoardo Vogna

Harald Dialer

Helmut Hartsberger

Gerhard Mestl

Klaus Wanninger

Werner Pitschi

Willi Michael Brandstädter

Leopold Streifinger

Markus Niedermeier

Andreas Reitzmann

Roberto Zaino

Uwe Dürr

Claudia Fischer

Christian Gūckel

Bastian Käding

Bastian KÄDING

Wermer Pitschi

Ammonia oxidation catalyst units comprising a pair of honeycomb-type blocks having interplaced between them a layer of a gas permeable material performing the function of radially mixing the gas flow, said blocks comprising an ammonia oxidation catalysts, and having height of less than 15 cm and the interplaced layer height of 3 to 0.5 cm.

Ammonia oxidation catalysts

The invention relates to a shaped catalyst body for the catalytic conversion of organic and inorganic components in fixed-bed reactors, wherein the shaped catalyst body is formed as cylinder with a base, a cylinder surface, a cylinder axis and at least one continuous opening running parallel to the cylinder axis, and the base of the cylinder has at least four corners.

Shaped catalyst body for flow-through fixed-bed reactors

Mixed oxides catalysts usable in particular in the full oxidation to COand HO of volatile organic compounds (VOC), in the decomposition of nitrogen protoxide to nitrogen and oxygen and the combustion of CO, Hand CHoff gases in fuel cells, comprising oxides of manganese, copper and LaOand/or NdO, having a percentage composition by weight expressed as MnO, CuO, LaOand/or NdOrespectively of 35-56%, 19-31% and 20-37%. The oxides are supported on inert porous inorganic oxides, preferably alumina.

Mixed oxides catalysts

A catalyst for removing nitrogen protoxide from gas mixtures which contain it, comprising mixed oxides of cobalt, manganese and rare earth metals having composition expressed as percentage by weight of CoO, MnO and transition metal oxide in the lowest state of valence as follows: MnO 38-56%, CoO 22-30%, rare earth metal oxide 22-32%.

Catalyst for the decomposition of nitrogen protoxide

A method for applying a washcoat suspension to a support structure. To provide coatings with largely uniform thickness starting from washcoat suspensions, the method uses a device () set up to produce, by means of a process gas (), a fluid bed of support structures in which the support structures circulate elliptically or toroidally, the method comprising the steps of:

Method for applying a wash coat suspension to a carrier structure

A process for the fixed bed oxidation of methanol to formaldehyde wherein the bed comprises at least two layers having different catalytic activity, wherein the layer of lower activity is comprised in the part of the bed from which the reactant gas mixture enters and its activity is calibrated so that the maximum hot spot temperature in the layer is comprised between 350&#xb0; C. and 430&#xb0; C. and is higher than the maximum hot spot temperature of the layer of greater activity formed by pure catalyst, and wherein during the period in which the situation of the maximum hot spot temperature of the layer of lower activity remains at the values cited above, the conversion of methanol is higher than 96% by mols.

Process for oxidation on fixed catalytic bed of methanol to formaldehyde

The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO, characterized in that at least a portion of the TiOused has the following properties: (a) the BET surface area is more than 15 m/g, (b) at least 25% of the total pore volume is formed by pores having a radius between 60 and 400 nm, and (c) the primary crystal size is more than 22 &#xe5;ngstr&#xf8;m. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.

Catalyst and method for producing phthalic anhydride

The invention relates to a shaped catalyst body for preparing maleic anhydride, which comprises mixed oxides of vanadium and of phosphorus as catalyst components. To develop a generic shaped catalyst body further so that it has improved properties, it is proposed that the basic geometric body enveloping the shaped catalyst body () be a prism () having a first triangular face and a second triangular face and the shaped catalyst body () be provided with three through openings () which extend from a first face of the shaped body () which contacts the first triangular face of the prism () to a second face of the shaped body () which contacts the second triangular face of the prism ().

Shaped catalyst body for partial oxidation reactions

The present invention relates to a catalyst for preparing phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, comprising at least three catalyst zones which have different compositions and, from the gas inlet side toward the gas outlet side, are referred to as first, second and third catalyst zone, the catalyst zones having in each case an active composition comprising TiOwith a content of Na of less than 0.3% by weight, and the active composition content decreasing from the first catalyst zone disposed toward the gas inlet side to the third catalyst zone disposed toward the gas outlet side, with the proviso that

Multi-layer catalyst for producing phthalic anhydride

The invention relates to a coated catalyst, especially for oxidation of methanol to formaldehyde, which, on an inert, preferably essentially nonporous, support body, has at least one coating which comprises, before the removal of the organic fractions of components b) and c): (a) oxides, or precursor compounds convertible to the corresponding oxides, of molybdenum and iron, where the molar ratio of Mo:Fe is between 1:1 and 5:1, and optionally further metallic components or metal oxide components or precursor compounds convertible to the corresponding oxides, (b) at least one organic binder, preferably an aqueous dispersion of copolymers, especially selected from vinyl acetate/vinyl laurate, vinyl acetate/ethylene, vinyl acetate/acrylate, vinyl acetate/maleate, styrene/acrylate or mixtures thereof, and (c) at least one further component selected from the group consisting of SiOsol or precursors thereof, AlOsol or precursors thereof, ZrOsol or precursors thereof, TiOsol or precursors thereof, waterglass, MgO, cement, monomeric, oligomeric or polymeric silanes, alkoxysilanes, aryloxysilanes, acryloyloxysilanes, aminosilanes, siloxanes or silanols. Additionally described is a process for preparing the catalyst and its preferred use.

Shell catalyst, in particular for oxidation of methanol to formaldehyde, and also method for production thereof

The present invention relates to a catalyst for preparing phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, comprising at least three catalyst zones which have different compositions and, from the gas inlet side toward the gas outlet side, are referred to as first, second and third catalyst zone, the catalyst zones having in each case an active composition comprising TiO, and the active composition content decreasing from the first catalyst zone disposed toward the gas inlet side to the third catalyst zone disposed toward the gas outlet side, with the proviso that Also described is a preferred process for preparing such a catalyst and the preferred use of the titanium dioxide used in accordance with the invention.

The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO, characterized in that at least a portion of the TiOused has the following properties: (a) the BET surface area is more than 15 m/g, (b) the primary crystal size is more than 210 &#xe5;ngstr&#xf8;m. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.

Catalyst and method for preparing phthalic anhydride

The present invention relates to the use of a catalyst comprising at least one first catalyst zone located towards the gas inlet, a second catalyst zone located closer to the gas outlet and a third catalyst zone located even closer to or at the gas outlet for the preparation of phthalic anhydride by gas-phase oxidation of o-xylene and/or naphthalene, with the catalyst zones preferably each having an active composition comprising TiO, characterized in that the catalyst activity of the first catalyst zone is higher than the catalyst activity of the second catalyst zone. Furthermore, a preferred process for the preparation of phthalic anhydride is described.

Use of a multi-layer catalyst for producing phthalic anhydride

The present invention relates to processes for improving or optimizing a catalyst for the preparation of phthalic anhydride by gas-phase oxidation of o-xylene and/or naphthalene, which comprises the following steps: a) provision of a starting catalyst (C) comprising at least one first catalyst zone located towards the gas inlet and a second catalyst zone located closer to the gas outlet, with the catalyst zones preferably each having an active composition comprising TiO; b) replacement of part of the first catalyst zone by an upstream zone of a catalyst having a higher activity than the first catalyst zone in order to provide an improved catalyst. Furthermore, an improved catalyst obtainable by this process is described.

Growing community of inventors

Karlsruhe, Germany

Marvin Estenfelder