| Patent Number |
Title Of Patent |
Date Issued |
| 7402288 |
Reactor for testing catalyst systems |
July 22, 2008 |
| A reactor for testing catalyst systems which has a plurality of catalyst tubes (2) which are arranged parallel to one another in the interior space of the reactor and whose ends are welded into tube plates and also has caps (3) at each end of the reactor which each bound a cap space (4), |
| 7390911 |
Method for producing phthalic anhydride |
June 24, 2008 |
| The invention relates to a process for preparing phthalic anhydride, in which the catalytic gas-phase oxidation of o-xylene and/or naphthalene is carried out over at least three zones of catalysts of increasing activity, with only the last zone of the catalyst system containing phosp |
| 7371893 |
Production of aldehydes, carboxylic acids and/or carboxylic acid anhydrides by means of catalyst |
May 13, 2008 |
| A description is given of a process for preparing aldehydes, carboxylic acids and/or carboxylic anhydrides, in particular phthalic anhydride, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed at elevated temperature over a bed of a first catalyst |
| 7338918 |
Catalyst having a silver-vanadium oxide phase and a promoter phase |
March 4, 2008 |
| A catalyst is described which has a catalytically active composition which contains a phase A and a phase B in the form of three-dimensional delimited regions, wherein phase A is a silver-vanadium oxide bronze and phase B a mixed oxide phase based on titanium dioxide and vanadium pen |
| 7271279 |
Method for the production of unsaturated nitriles from alkanes |
September 18, 2007 |
| The invention relates to a process for preparing unsaturated nitrites from the corresponding alkanes which comprises the steps: a) feeding an alkane into a dehydrogenation zone and catalytically dehydrogenating the alkane to the corresponding alkene to obtain a product gas stream A whi |
| 7253310 |
Preparation of (meth)acrylic acid |
August 7, 2007 |
| A process for preparing (meth)acrylic acid by heterogeneously catalyzed gas phase partial oxidation of a saturated hydrocarbon precursor compound, in which the charging gas mixture contains from 5 to 25% by volume of steam and the molar ratio of molecular oxygen present in the chargi |
| 7176335 |
Method for producing methacrolein from isobutane |
February 13, 2007 |
| A process prepares methacrolein from isobutane by subjecting isobutane to a partial catalytic dehydrogenation in the gas phase and using the isobutenic product gas mixture to charge an oxidation zone in which the isobutene is oxidized to methacrolein in the gas phase with heterogeneous |
| 7151184 |
Preparation of phthalic anhydride |
December 19, 2006 |
| Process for preparing phthalic anhydride by gas-phase oxidation of xylene, naphthalene or mixtures thereof in a shell-and-tube reactor thermostatted by means of a heat transfer medium over three or more different fixed-bed catalysts arranged in zones, wherein the process is carried out s |
| 7134848 |
Pump for transporting heat-exchange medium for a multi-tube reactor |
November 14, 2006 |
| The invention relates to a pump (1) having a pump guide tube (13) for the transport of a heat-exchange medium (6) for a reactor having a bundle of catalyst tubes (2), where the pump (1) has a casing (14) which surrounds the pump guide tube (13), having an aperture (15) in the lower part |
| 7019169 |
Preparation of (meth)acrylic acid |
March 28, 2006 |
| A process for preparing (meth)acrylic acid by conducting a saturated hydrocarbon precursor compound through a catalyst bed I whose catalysts I have, as the active composition, a multimetal oxide I which has a specific X-ray diffractogram and contains the elements Mo and V, at least o |
| 7012157 |
Preparation of (meth)acrylic acid |
March 14, 2006 |
| A process for preparing (meth)acrylic acid, in which a saturated hydrocarbon precursor compound is conducted through a catalyst charge which consists of two spatially successive catalyst beds I, II in the flow direction of the reaction mixture, each of which contains different cataly |
| 6933407 |
Method for producing methacrylic acid from isobutane |
August 23, 2005 |
| A process prepares methacrylic acid from isobutane by subjecting isobutane to a partial catalytic dehydrogenation in the gas phase and charging an oxidation zone with the isobutenic product gas mixture after the components other than isobutane and isobutene have been substantially re |
| 6781017 |
Method for the production of acrolein or acrylic acid or the mixture thereof from propane |
August 24, 2004 |
| In a process for the preparation of acrolein or acrylic acid or a mixture thereof from propane, the propane is subjected, in a first reaction stage, to a partial dehydrogenation under heterogeneous catalysis to give propene, of the components contained in the product gas mixture formed i |
| 6528683 |
Method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic hydroca |
March 4, 2003 |
| The invention relates to a method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic carboxylic acids and/or carboxylic acid anhydrides comprised of a supporting core and of catalytically active metal oxides which are deposited in a shell-shaped manner |
