Catalytic Converter Arrangement with Optimized Surface for Producing Phthalic Anhydride

A catalytic converter arrangement for producing phthalic anhydride by means of a gas phase oxidation of aromatic hydrocarbons, comprising a reactor with a gas inlet side for a reactant gas, a gas outlet side for a product gas, a first catalytic converter layer made of catalytic converter elements, and at least one second catalytic converter layer made of catalytic converter elements. The first catalytic converter layer is arranged on the gas inlet side, and the second catalytic converter layer is arranged downstream of the first catalytic converter layer in the gas flow direction. The catalytic converter elements have an outer layer of an active compound. The invention is characterized in that the active compound content in the first catalytic converter layer and/or in the second catalytic converter layer is below 7 wt. %, based on the total weight of the catalytic converter elements, and the ratio of the total surface of the active compound to the volume of the catalytic converter layer is preferably 10000 cm−1 to 20000 cm−1, in each catalytic converter layer. 1. A catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons comprising a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas , a first catalyst zone made up of catalyst bodies , at least one second catalyst zone made up of catalyst bodies , where the first catalyst zone is arranged at the gas inlet end and the second catalyst zone is arranged downstream of the first catalyst zone in the gas flow direction and the catalyst bodies have an outer layer of active composition , wherein the active composition content in the first catalyst zone and/or in the second catalyst zone is less than 7% by weight , based on the total weight of the catalyst bodies , and the ratio of the total surface area of the active composition to the volume of the catalyst zone in the respective catalyst zone is from 10 000 cmto 20 000 cm.2. The catalyst ...

METHOD FOR PRODUCING A METAL-CONTAINING SHELL CATALYST WITHOUT INTERMEDIATE CALCINING

A method for producing a shell catalyst which comprises, in the outer shell, one or more of the following metals: Pd, Pt, Ag and Au. Also the use of the shell catalyst produced using the method according to the invention for the production of vinyl acetate monomer, in the hydrogenation of hydrocarbons, in particular the selective hydrogenation of polyunsaturated hydrocarbon compounds, or in the oxidation of alcohols to ketones/aldehydes/carboxylic acids. 1. A method for producing a shell catalyst , in which a substantially chloride-free Pd- , Pt- , Ag- or Au-containing precursor compound is applied to a support body by spraying the support body with a solution containing the precursor compound , while the support bodies are mixed by a controlled glide layer consisting of air and/or inert gas , and in which the support body with the applied precursor compound is subjected to a temperature treatment in the range of from 80° C. to 500° C. in a non-oxidizing atmosphere.2. The method according to claim 1 , in which claim 1 , before or after the temperature treatment claim 1 , a further substantially chloride-free Pd- claim 1 , Pt- claim 1 , Ag- or Au-containing precursor compound is applied to the support body.3. The method according to claim 2 , in which the one precursor compound and the further precursor compound can form the following pairs:(a) Pd-containing precursor compound and Au-containing precursor compound;(b) Pt-containing precursor compound and Au-containing precursor compound;(c) Pd-containing precursor compound and Ag-containing precursor compound;(d) Pt-containing precursor compound and Ag-containing precursor compound;(e) Ag-containing precursor compound and Au-containing precursor compound; or(f) Pd-containing precursor compound and Pt-containing precursor compound.4. The method according to claim 2 , in which claim 2 , if the further precursor compound is applied after the temperature treatment claim 2 , the support body with the applied further ...

METHOD FOR PRODUCING A SHELL CATALYST AND SHELL CATALYST

A method for producing a shell catalyst is provided which comprises a porous catalyst support shaped body with an outer shell in which at least one transition metal in metal form is contained, comprising: providing catalyst support shaped bodies; applying a transition-metal precursor compound to an outer shell of the catalyst support shaped bodies; and converting the metal component of the transition-metal precursor compound into the metal form by reduction in a process gas at a temperature of from 50 to 500° C., wherein the temperature and the duration of the reduction are chosen such that the product of reduction temperature in ° C. and reduction time in hours lies in a range of from 50 to 5000, more preferably 80 to 2500, further preferably 80 to 2000, and more preferably 100 to 1500. 117.-. (canceled)181040. Method for producing a shell catalyst which comprises a porous catalyst support shaped body with an outer shell in which at least one transition metal in metal form is contained , using a device () which is set up to cause a circulation of the catalyst support shaped bodies by means of a process gas () , comprising{'b': 10', '40, 'providing catalyst support shaped bodies, comprising charging the device () with the catalyst support shaped bodies and causing a circulation of the catalyst support shaped bodies by means of the process gas ();'}applying a transition-metal precursor compound to an outer shell of the catalyst support shaped bodies, comprising spraying the outer shell of the circulating catalyst support shaped bodies with a solution containing the transition-metal precursor compound at a temperature of from 60° C. to 90° C.; andfollowing the application, converting the metal component of the transition-metal precursor compound into the metal form by reduction in the process gas at a temperature of from 50° C. to 140° C., preferably 80° C. to 120° C., wherein the temperature and the duration of the reduction are chosen such that the product of ...

Copper-promoted shell catalyst for producing alkenyl carboxylic acid esters

A method for producing a shell catalyst which is suitable for the synthesis of alkenyl carboxylic acid esters, in particular for producing vinyl acetate monomer (VAM) from ethylene or allyl acetate monomer from propylene by means of oxy-acetylation. Also, a shell catalyst that can be obtained by the method according to the invention, as well as the use of the shell catalyst produced using the method for producing alkenyl carboxylic acid esters, in particular vinyl acetate monomer (VAM) and allyl acetate monomer.

Pre-Gold-Plating PD-AU-Coated Shell Catalysts

The present invention relates to a method for producing a shell catalyst that is suitable for producing vinyl acetate monomer (VAM). The present invention also relates to a shell catalyst that can be obtained by the method according to the invention as well as the use of the shell catalyst according to the invention for producing VAM. 1. Method for producing a shell catalyst , comprising the steps of:(a) subjecting a packed bed of a catalyst support body to a circulating movement;(b) bringing an atomized aqueous solution containing an Au-containing precursor compound into contact with the packed bed of the catalyst support body subjected to the circulating movement by spraying on of the solution;(c) bringing an atomized aqueous solution containing a Pd-containing precursor compound with the catalyst support body produced after step (b); and(d) reducing the metal components of the precursor compounds to elemental metals by subjecting the catalyst support body obtained in step (c) to a temperature treatment in a non-oxidizing atmosphere.2. Method according to claim 1 , wherein claim 1 , during the bringing into contact in step (c) claim 1 , the solution is sprayed onto a packed bed of the catalyst support body subjected to a circulating movement.3. Method according to claim 1 , wherein the temperature treatment is carried out within a range of from 60° C. to 500° C.4. Method according to claim 2 , wherein the circulating movement of the catalyst support bodies is carried out with a process gas.5. Method according to claim 2 , wherein the circulating movement of the catalyst support bodies takes place in a fluid bed or a fluidized bed.6. Method according to claim 1 , wherein the ratio of the weight of the solution sprayed on in step (b) or (c) to the weight of the packed bed of the support body lies in the range of from 0.005 to 0.1.7. Method according to claim 1 , wherein in step (c) an Au-containing precursor compound is applied to the catalyst support body.8. Method ...

Composite Material Containing A Bismuth-Molybdenum-Nickel Mixed Oxide Or A Bismuth-Molybdenum-Cobalt Mixed Oxide And SIO2

The present invention relates to a process for producing a composite material and also the composite material itself. The composite material contains a bismuth-molybdenum-nickel mixed oxide or a bismuth-molybdenum-cobalt mixed oxide and a specific SiO2 as pore former. The present invention also relates to the use of the composite material according to the invention for producing a washcoat suspension and also a process for producing a coated catalyst using the composite material according to the invention. Furthermore, the present invention also relates to a coated catalyst which has a catalytically active shell comprising the composite material according to the invention on a support body. The coated catalyst according to the invention is used for preparing [alpha],[beta]-unsaturated aldehydes from olefins.

BASIC CATALYST SUPPORT BODY HAVING A LOW SURFACE AREA

A catalyst support body containing an SiO-containing material and a metal selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals and mixtures thereof, wherein the total metal content lies in the range of from 0.5 to 10 wt.-%, relative to the total weight of the catalyst support. Also, a catalyst that comprises a catalyst support body according to the invention and a catalytically active metal, in particular palladium and/or gold. Also, a method for producing a catalyst support, wherein an SiO-containing material is treated with a metal-containing compound, dried and then calcined. Also, a method for producing a catalyst, in which a solution having a precursor compound of a catalytically active metal is applied to a catalyst support body. 1. A catalyst support body containing an SiO-containing material and a metal selected from the group consisting of alkali metals , alkaline earth metals , rare earth metals and mixtures thereof , wherein the total metal content lies in the range of from 0.5 to 10 wt.-% , relative to the total weight of the catalyst support body , and wherein the BET surface area of the catalyst support body lies in the range of from 50 to 150 m/g.2. The catalyst support body according to claim 1 , wherein the catalyst support body is present in the form of spheres or rings.3. The catalyst support body according to claim 1 , having an average pore radius in the range of from 12 to 30 nm.4. The catalyst support body according to claim 1 , having a total pore volume in the range of from 280 to 550 mm/g.5. The catalyst support body according to claim 1 , having a bulk density in the range of from 0.8 to 1.2 g/cm.6. The catalyst support body according to claim 1 , having BET surface area in the range of from 50 to 140 m/g.7. The catalyst support body according to claim 1 , having a basicity in the range of from 100 to 800 μval/g.8. The catalyst support body according to claim 1 , wherein the metal is Li claim 1 , Na ...

Post-Gilding of PD-AU-Coated Shell Catalysts

The invention relates to a method for producing a shell catalyst that is suitable for producing vinyl acetate monomer (VAM). The invention further relates to a shell catalyst that is obtainable by the method according to the invention and to the use of the shell catalyst according to the invention for producing VAM. 1. A process for producing an eggshell catalyst , comprising the steps of:(a) subjecting a bed of a catalyst support body to a circulating motion;(b) contacting an atomized aqueous solution comprising a Pd-containing precursor compound and an Au-containing precursor compound with the bed of the catalyst support body subjected to the circulating motion by spraying, or contacting an atomized aqueous solution comprising a Pd-containing precursor compound and an atomized aqueous solution comprising an Au-containing precursor compound with the bed of the catalyst support body subjected to the circulating motion by spraying;(c) contacting an atomized aqueous solution comprising an Au-containing precursor compound with the catalyst support body obtained after step (b); and(d) metal reduction by subjecting the catalyst support body obtained in step (c) to a thermal treatment in a nonoxidizing atmosphere.2. The process as claimed in claim 1 , wherein the contacting in step (c) includes spraying the solution onto a bed of the catalyst support body subjected to a circulating motion.3. The process as claimed in wherein the thermal treatment is conducted within a range from 40° C. to 500° C.4. The process as claimed in claim 2 , wherein the circulating motions are conducted with the aid of a process gas.5. The process as claimed in claim 2 , wherein the circulating motions take place in a moving bed or fluidized bed.6. The process as claimed in claim 1 , wherein the ratio of the weight of the solution sprayed on in step (b) or (c) to the weight of the bed of the catalyst support body is within the range from 0.005 to 0.1.7. The process as claimed in claim 1 , wherein ...

Composite Material Containing A Bismuth-Molybdenum-Nickel Mixed Oxide Or A Bismuth-Molybdenum-Cobalt Mixed Oxide And SIO2

The present invention relates to a process for producing a composite material and also the composite material itself. The composite material contains a bismuth-molybdenum-nickel mixed oxide or a bismuth-molybdenum-cobalt mixed oxide and a specific SiO2 as pore former. The present invention also relates to the use of the composite material according to the invention for producing a washcoat suspension and also a process for producing a coated catalyst using the composite material according to the invention. Furthermore, the present invention also relates to a coated catalyst which has a catalytically active shell comprising the composite material according to the invention on a support body. The coated catalyst according to the invention is used for preparing [alpha],[beta]-unsaturated aldehydes from olefins. 1. A process for producing a composite material , comprising the steps of:(a) preparing a first aqueous solution containing salts of bismuth and of nickel or of bismuth and of cobalt;(b) preparing a second aqueous solution containing a molybdenum compound and optionally a binder;(c) adding the first aqueous solution to the second aqueous solution, forming a first suspension;{'sub': '2', '(d) adding a second suspension to the first suspension to form a third suspension, the second suspension containing SiOwhich has a pore volume in the range from 0.1 to 10 ml/g and an average particle size in the range from 3 to 20 μm; and'}(e) spray-calcining the third suspension at a temperature in the range from 200 to 600° C., to give the composite material containing a bismuth-molybdenum-nickel mixed oxide or bismuth-molybdenum-cobalt mixed oxide.2. The process as claimed in claim 1 , wherein in step (a) the first aqueous solution further comprises a salt of magnesium claim 1 , a salt of iron or a combination thereof.3. The process as claimed in claim 1 , wherein in step (a) the first aqueous solution contains a potassium compound.4. The process as claimed in claim 1 , ...

METHOD FOR PRODUCING A CATALYST FOR THE PARTIAL OXIDATION/AMMOXIDATION OF OLEFINS

The present invention relates to a method for producing a supported catalyst, a catalyst which is obtainable using the method, and use thereof for the partial oxidation or ammoxidation of olefins, in particular for the oxidation of propene to acrolein, of isobutene to methacrolein, and/or the ammoxidation of propene to acrylonitrile. The method according to the invention includes the following steps: a) providing a solution in which precursor compounds of the catalytically active component are essentially completely dissolved in a suitable solvent; b) bringing the solution obtained in step a) into contact with a (chemically) inert, porous support having a specific surface of 1 to 500 m/g; c) heat treatment of the material obtained in step b), in which the precursor compounds of the catalytically active component are converted to their oxides. 1. Method for producing a catalyst which includes as the catalytically active component a compound having the general formula MoBiFeABCDO , where A stands for Ni and/or Co , B stands for one or more metals selected from Mg , Cr , Mn , Zn , Ce , and Ca and combinations thereof , C stands for W , and D stands for one or more alkali metals , where x stands for a number from 10 to 14 , y stands for a number from 0.1 to 5 , z stands for a number from 0.5 to 5 , a stands for a number from 1 to 10 , b stands for a number from 0.1 to 6 , c stands for a number from ≧0 to 2 , d stands for a number from 0.02 to 2 , and v is determined by the oxidation state of the elements , the method including the following steps:a) Providing a solution in which precursor compounds of the catalytically active component are essentially completely dissolved in a suitable solvent;{'sup': '2', 'b) Bringing the solution obtained in step a) into contact with a chemically inert, porous support having a specific surface of 1 to 500 m/g;'}c) Heat treatment of the material obtained in step b), in which the precursor compounds of the catalytically active component ...

SYNTHESIS OF A MOVNBTE CATALYST HAVING A REDUCED NIOBIUM AND TELLURIUM CONTENT AND HIGHER ACTIVITY FOR THE OXIDATIVE DEHYDROGENATION OF ETHANE

A novel mixed oxide material is disclosed which contains molybdenum, vanadium, tellurium and niobium and the use of the molybdenum mixed oxide material as catalyst for the oxidative dehydrogenation of ethane to ethene or the oxidation of propane to acrylic acid and a process for producing the mixed oxide material. 1. A mixed oxide material comprising the elements molybdenum , vanadium , niobium and tellurium which in the XRD using Cu—Kα radiation has diffraction reflections h , i , k and I whose peaks are approximately at the diffraction angles (2θ) 26.2°±0.5° (h) , 27.0°±0.5° (i) , 7.8°±0.5° (k) and 28.0°±0.5° (I) , said mixed oxide material having the following stoichiometry:{'br': None, 'sub': 1', 'a', 'b', 'c', 'n, 'MoVNbTeO\u2003\u2003(I)'}a=0.2 to 0.35,b=greater than 0 to 0.08,c=greater than 0 to 0.08,n=an integer determined by the valence and abundance of the elements other than oxygen in (I).2. The mixed oxide material as claimed in claim 1 , wherein said mixed oxide material has a BET surface area which is greater than 15 m/g.3. A process for producing a mixed oxide material as claimed in claim 1 , comprising the steps:a) production of a mixture of starting compounds containing molybdenum, vanadium, niobium and a tellurium-containing starting compound in which tellurium is present in the oxidation state +4, and also oxalic acid and at least one further oxo ligand,b) hydrothermal treatment of the mixture of starting compounds at a temperature of from 100° C. to 300° C. to give a product suspension,c) isolation and drying of the mixed oxide material present in the suspension resulting from step b).4. The process as claimed in claim 3 , wherein the tellurium-containing starting compound is tellurium dioxide or a compound of the formula MTeOwhere n=1 or 2 and x=2/n claim 3 , where M is an alkali metal or alkaline earth metal.5. The process as claimed in claim 3 , wherein the mixture of starting compounds is present as aqueous suspension.6. The process as ...

Method For Producing A Shell Catalyst, The Catalyst And Its Use For The Synthesis Of Alkenyl Carboxylic Esters

The present invention relates to a method for producing a shell catalyst which is suitable for the synthesis of alkenyl carboxylic acid esters, in particular for producing vinyl acetate monomers (VAM) from ethylene and allyl acetate monomers from propylene by means of oxy-acetylation. The present invention also relates to a shell catalyst that can be obtained by the method according to the invention as well as the use of the shell catalyst produced using the method according to the invention or of the shell catalyst according to the invention for producing alkenyl carboxylic acid esters, in particular VAM and allyl acetate monomer. 1. Method for producing a shell catalyst , comprising the steps of:(a) applying an acetate to a support body;(b) applying a Pd precursor compound and an Au precursor compound to a support body obtained after step (a); and(c) reducing the metal components of the precursor compounds of the support body obtained after step (b) to the elemental metals.2. Method according to claim 1 , wherein the acetate is an alkali acetate.3. Method according to claim 1 , wherein the Pd precursor compound is a hydroxo complex.4. Method according to claim 1 , wherein the Au precursor compound is an aurate.5. Method according to claim 1 , wherein the application of the acetate takes place by spray impregnation of a solution containing the acetate.6. Method according to claim 1 , wherein the application of the Pd precursor compound and of the Au precursor compound takes place simultaneously by spray impregnation of a mixed solution containing both precursor compounds or by spray impregnation of two solutions each containing one of the precursor compounds.7. Method according to claim 1 , wherein before step (b) an Au precursor compound is additionally applied to the support body obtained after step (a).8. Method according to claim 1 , wherein before step (c) an Au precursor compound is additionally applied to the support body obtained after step (b).9. Method ...

Production Of Shell Catalysts In A Coating Device

The present invention relates to a method for producing a shell catalyst which is suitable for the synthesis of alkenyl carboxylic acid esters, in particular for producing vinyl acetate monomers (VAM) from ethylene and allyl acetate monomers from propylene by means of oxy-acetylation. The present invention also relates to a shell catalyst that can be obtained by the method according to the invention as well as the use of the shell catalyst produced using the method according to the invention or of the shell catalyst according to the invention for producing alkenyl carboxylic acid esters, in particular VAM and allyl acetate monomer. 1. Method for producing a shell catalyst , comprising the steps of:(a) introducing a support body into a coating device;(b) applying a Pd precursor compound and an Au precursor compound, in each case in dissolved form, to the support body by spray coating in the coating device;(c) drying the support body coated with the precursor compounds in the coating device;(d) reducing the metal components of the precursor compounds to the elemental metals in the coating device; and(e) removing the support body from the coating device.2. Method according to claim 1 , wherein the Pd precursor compound is a hydroxo complex.3. Method according to claim 1 , wherein the Au precursor compound is an aurate.4. Method according to claim 1 , wherein step (b) is carried out by simultaneous application of the Pd precursor compound and the Au precursor compound.5. Method according to claim 1 , wherein the application of the Pd precursor compound and of the Au precursor compound in step (b) takes place either by spray coating of a mixed solution containing both precursor compounds or by spray coating of two solutions each containing one of the precursor compounds.6. Method according to claim 1 , wherein an Au precursor compound is additionally applied to the support body between steps (a) and (b).7. Method according to claim 1 , wherein an Au precursor compound is ...

New catalyst system for producing maleic anhydride by means of the catalytic oxidation of n-butane

The invention relates to a catalyst system for producing maleic anhydride by means of the catalytic oxidation of n-butane, comprising at least one reactor tube, which has two catalyst layers consisting of different catalyst particles, characterized in that the geometric surface area per catalyst particle is greater in the catalyst layer that is first in the gas flow direction than in the second catalyst layer. The invention further relates to a process for producing maleic anhydride by means of the catalytic oxidation of n-butane, wherein a mixture of oxygen and n-butane is fed through the catalyst system according to the invention and the at least one reactor tube is at elevated temperature.

Catalyst Material for the Oxidation of Hydrocarbons

A catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, in particular for the selective oxidation of propane to acrylic acid, is specified, comprising a) molybdenum (Mo), b) vanadium (V), c) niobium (Nb), d) tellurium (Te), e) nickel (Ni), f) tungsten (W) and g) manganese (Mn), in which the molar ratio of at least one element, which is selected from nickel, tungsten and manganese, to molybdenum lies in the range 0.01 to 0.2, more preferably 0.05 to 0.15 and particularly preferably from 0.0025:1 to 0.3:1. Furthermore, a catalyst for the oxidation and/or oxidative dehydrogenation of hydrocarbons, a use of the catalyst material or of the catalyst, a method for producing a catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons and a method for the selective oxidation of propane to acrylic acid is specified. 2. Catalyst material according to claim 1 , in which the molar ratio of at least one element claim 1 , which is selected from vanadium claim 1 , niobium and tellurium claim 1 , to molybdenum lies in the range of from 0.15:1 to 0.3:1 or 0.17:1 to 0.27:1; and/or with an X-ray diffractogram which has diffraction reflexes h claim 1 , i claim 1 , k and l the peaks of which lie at the diffraction angles (2θ) 26.2±0.5 (h) claim 1 , 27.0±0.5 (i) claim 1 , 7.8±0.5 (k) and 28.0±0.5 (l); and/or{'sub': h', 'i', 'k', 'l', 'x (x=1 to 3), 'claim-text': [{'br': None, 'i': R', '=P', 'P', '+P, 'sub': 1', 'h', 'h', 'i, '/()>0.3, preferably >0.35 and particularly preferably >0.4; and/or'}, {'br': None, 'i': R', '=P', 'P', '+P, 'sub': 2', 'i', 'i', 'l, '/()>0.5, preferably >0.6 and particularly preferably >0.63; and/or'}, {'br': None, 'i': R', '=P', 'P', '+P, 'sub': 3', 'i', 'i', 'k, '/()<0.8, preferably <0.75, particularly preferably <0.7; and/or'}], 'in which the intensities P, P, P, Pof the diffraction reflexes h, i, k and l of the X-ray diffractogram satisfy the following equations, with Ras the intensity ratio defined by ...

SYNTHESIS OF A MOVNBTE CATALYST HAVING AN INCREASED SPECIFIC SURFACE AND HIGHER ACTIVITY FOR THE OXIDATIVE DEHYDROGENATION OF ETHANE TO ETHYLENE

The invention relates to a mixed oxide material comprising the elements molybdenum, vanadium, niobium and tellurium, which, when using the Cu-Kα radiation, has diffraction reflections h, i, k and l in the XRD spectrum, said diffraction reflexes having their apex points at the diffraction angles (2·) 26.2°±0.5° (h), 27.0°±0.5° (i), 7.8°±0.5° (k) and 28.0°±0.5° (l), characterized in that the mixed oxide material has a pore volume of >0.1 cm/g. The mixed oxide material according to the invention is produced by a method comprising the steps of: a) producing a mixture of starting compounds containing molybdenum, vanadium, niobium and tellurium dioxide as a tellurium-containing starting compound as well as oxalic acid and a further oxoligand selected from the group consisting of dicarboxylic acids and diols, b) hydrothermally treating the mixture of starting compounds at a temperature of 100 to 300° C., c) separating and drying the mixed oxide material which is contained in the suspension resulting from step b). 1. A mixed oxide material comprising the elements molybdenum , vanadium , niobium and tellurium which in the XRD using Cu-Kα radiation has diffraction reflections h , i , k and l whose peaks are approximately at the diffraction angles (2θ) 26.2°±0.5° (h) , 27.0°±0.5° (i) , 7.8°±0.5° (k) and 28.0°±0.5° (l) , charactcrizcd in that wherein the mixed oxide material has a pore volume of greater than 0.1 cm3/g.2. The mixed oxide material as claimed in claim 1 , wherein it has a BET surface area of more than 30 m2/g.3. The mixed oxide material as claimed in claim 1 , wherein it has a volume of the pores smaller than 10 nm of more than 0.2 cm/g.4. The mixed oxide material as claimed in claim 1 , wherein the molar Mo:Te ratio is ≤11 and the molar Mo:Nb ratio is ≤11.5. A process for producing a mixed oxide material as claimed in claim 1 , comprising the steps:a) production of a mixture of starting compounds containing molybdenum, vanadium, niobium and a tellurium-containing ...

Synthesis of a MoVNbTe Shell Catalyst for Oxidative Dehydrogenation of Ethane to Ethylene

A novel coated catalyst having an outer shell which is composed of a catalyst material having high surface area and contains molybdenum, vanadium, tellurium and niobium, and the use of this catalyst for the oxidative dehydrogenation of ethane to ethene or the oxidation of propane to acrylic acid and also a process for producing the catalyst is disclosed.

Process for producing a vpo catalyst

The disclosure relates to a process for producing a VPO catalyst containing molybdenum and a vanadyl pyrophosphate phase, which comprises the steps: a) provision of a reaction mixture comprising a V(V) compound, a P(V) compound, an Mo compound, a reducing agent and a solvent, b) reduction of the V(V) compound by means of the reducing agent at least in parts to give vanadyl hydrogenphosphate in order to obtain an intermediate suspension, c) filtration of the intermediate suspension from step b) in order to obtain an intermediate, d) drying of the intermediate at a temperature of not more than 350° C. in order to obtain a dried intermediate and e) activation of the dried intermediate at a temperature above 200° C., characterized in that not more than 0.2% by weight of water, based on the weight of the reaction mixture, is present in step a) and no water is withdrawn during the reduction in step b). The disclosure further relates to a VPO catalyst which is able to be produced by the process of the disclosure and also a catalyst containing the molybdenum-containing vanadium-phosphorus mixed oxide.

CATALYST FOR THE OXIDATION OF HYDROCARBONS CONSISTING OF MOLYBDENUM, VANADIUM, NIOBIUM, TELLURIUM, MANGANESE AND COBALT

A catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, in particular for the selective oxidation of propane to acrylic acid, comprising a) molybdenum (Mo), b) vanadium (V), c) niobium (Nb), d) tellurium (Te), e) manganese (Mn) and cobalt, in which the molar ratio of at least one element, which is selected from manganese and cobalt, to molybdenum lies in the range 0.01 to 0.2. Furthermore, a catalyst for the oxidation and/or oxidative dehydrogenation of hydrocarbons, a use of the catalyst material or of the catalyst, a method for producing a catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, and a method for the selective oxidation of propane to acrylic acid. 2. The catalyst material according to claim 1 , in which the molar ratio of at least one element claim 1 , which is selected from vanadium claim 1 , niobium and tellurium claim 1 , to molybdenum lies in the range of from 0.1:1 to 0.3:1 or 0.13:1 to 0.27:1; and/orin which nickel is contained in a molar ratio to molybdenum in the range of from 0 to 0.04.3. The catalyst material according to with an X-ray diffractogram which has diffraction reflexes h claim 1 , i claim 1 , k and l the peaks of which lie at the diffraction angles (2θ) 26.0±0.5 (h) claim 1 , 27.1±0.5 (i) claim 1 , 7.8±0.5 (k) and 28.0±0.5 (l); and/or{'sub': h', 'i', 'k', 'l', 'x (x=1 to 3), 'claim-text': [{'br': None, 'i': R', '=P', 'P', '+P, 'sub': 1', 'h', 'h', 'i, '/()>0.3; and/or'}, {'br': None, 'i': R', '=P', 'P', '+P, 'sub': 2', 'i', 'i', 'l, '/()>0.5; and/or'}, {'br': None, 'i': R', '=P', 'P', '+P, 'sub': 3', 'i', 'i', 'k, '/()<0.8; and/or'}], 'in which the intensities P, P, P, Pof the diffraction reflexes h, i, k and l satisfy the following equations, with Ras the intensity ratio defined by the equationsin which, in the X-ray diffractogram, the diffraction reflex i has the second highest intensity and/or the diffraction reflex h has the third highest intensity.4. The catalyst ...

Alkali Metal-Modified Vanadium-Phosphorus Oxide (VPO) Catalyst

The present invention relates to a catalyst containing a vanadium-phosphorus oxide and an alkali metal, wherein the proportion by weight of alkali metal in the vanadium-phosphorus oxide is in the range from 10 to 400 ppm, based on the total weight of the vanadium-phosphorus oxide, a process for producing it and also the use of the catalyst for the gas-phase oxidation of hydrocarbons, in particular for preparing maleic anhydride.

SYNTHESIS OF A MOVTENB CATALYST FROM LOW-COST METAL OXIDES

A novel catalyst and process for producing a mixed oxide material containing molybdenum, vanadium, tellurium and niobium is disclosed. The material can be used as a catalyst for the oxidative dehydrogenation of ethane to ethene or the oxidation of propane to acrylic acid.

Catalyst Arrangement With Optimized Void Fraction For The Production Of Phthalic Acid Anhydride

The invention relates to a catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons, which comprises a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas and also a first catalyst zone made up of catalyst bodies and at least one second catalyst zone made up of catalyst bodies, where the first catalyst zone is arranged at the gas inlet end and the second catalyst zone is arranged downstream of the first catalyst zone in the gas flow direction and the length of the first catalyst zone in the gas flow direction is less than the length of the second catalyst zone in the gas flow direction, characterized in that the first catalyst zone has a higher gap content compared to the second catalyst zone.

METHOD FOR PRODUCING MIXED OXIDE MATERIALS CONTAINING MOLYBDENUM

The invention relates to a method for producing a mixed oxide material containing the elements molybdenum, vanadium, niobium and tellurium, comprising the following steps: a) producing a mixture from starting compounds containing molybdenum, vanadium, niobium and a tellurium-containing starting compound, present in the tellurium in the +4 oxidation state, b) hydrothermal treatment of the mixture from starting compounds at a temperature of between 100° C. to 300° C., in order to obtain a product suspension, c) separating off and drying the solid material from the product suspension obtained in step b), d) activating the solid material in inert gas in order to obtain the mixed oxide material. The invention is characterized in that the tellurium-containing starting compound has a particle size Dof less than 100 μm. 1. A method for preparing a mixed-oxide material containing the elements molybdenum , vanadium , niobium , and tellurium , comprising the following steps:a) preparation of a mixture of starting compounds that contains molybdenum, vanadium, niobium, and a tellurium-containing starting compound in which tellurium is in oxidation state +4,b) hydrothermal treatment of the mixture of starting compounds at a temperature of 100° C. to 300° C. to obtain a product suspension,c) separation and drying of the solid from the product suspension resulting from step b),{'sub': '90', 'd) activation of the solid in inert gas to obtain the mixed-oxide material, characterized in that the tellurium-containing starting compound has a particle size Dsmaller than 100 μm.'}2. The method as claimed in claim 1 , wherein the mixture of starting compounds is an aqueous suspension.3. The method as claimed in claim 1 , wherein the tellurium-containing starting compound is tellurium dioxide or a compound of formula MTeOwhere n=1 or 2 and x=2/n and wherein M is an alkali metal or alkaline earth metal.4. The method as claimed in claim 1 , wherein one of the starting compounds is ammonium ...

Method for producing a shell catalyst and corresponding shell catalyst

The present invention relates to a method for producing a shell catalyst which comprises a porous shaped catalyst support body with an outer shell in which at least one catalytically active species is present. In order to provide a shell catalyst production method by means of which shell catalysts can be produced, said shell catalysts having, over a comparatively large region of their shell thickness, a substantially uniform concentration of catalytically active species and having a substantially uniform shell thickness, what is proposed is a method using an device which is designed to generate, by means of a process gas, a fluid bed of shaped catalyst support bodies in which the shaped catalyst support bodies circulate elliptically or toroidally, preferably toroidally, comprising the steps of charging the device with shaped catalyst support bodies and generating a shaped catalyst support body fluid bed by means of a process gas, the shaped catalyst support bodies circulating elliptically or toroidally in the fluid bed, preferably toroidally; impregnating an outer shell of the shaped catalyst support body with a catalytically active species or precursor thereof by spraying the shaped catalyst support bodies circulating elliptically or toroidally in the fluid bed with a solution comprising a catalytically active species or a precursor thereof; drying the shaped catalyst support bodies sprayed with the solution.

Zirconium oxide-doped catalyst support, method for producing the same and catalyst containing a zirconium oxide-doped catalyst support

The present invention relates to a porous catalyst support, consisting of a material comprising a natural sheet silicate, containing ZrO2 dispersed throughout the material. The present invention also relates to a method for the production of the catalyst support according to the invention and to a shell catalyst containing the catalyst support according to the invention and also the use of the catalyst according to the invention in particular for the production of vinyl acetate monomer (VAM).

Doped Pd / Au coated catalyst, process for its preparation and its use

Die vorliegende Erfindung betrifft einen Schalenkatalysator für die Herstellung von Vinylacetat-Monomer (VAM), umfassend einen als Formkörper ausgebildeten, oxidischen porösen Katalysatorträger mit einer äußeren Schale, in welcher metallisches Pd und Au enthalten sind. Um einen Schalenkatalysator für die Herstellung von VAM bereitzustellen, der eine verhältnismäßig hohe Aktivität aufweist und relativ kostengünstig erhältlich ist, wird vorgeschlagen, dass der Katalysatorträger mit zumindest einem Oxid eines Elementes, ausgewählt aus der Gruppe, bestehend aus Li, P, Ca, V, Cr, Mn, Fe, Sr, Nb, Ta, W, La und den Seltenerdmetallen dotiert ist. The present invention relates to a coated catalyst for the production of vinyl acetate monomer (VAM), comprising a formed as a shaped body, oxidic porous catalyst support having an outer shell, in which metallic Pd and Au are included. In order to provide a shell catalyst for the production of VAM which has a relatively high activity and is relatively inexpensive to obtain, it is proposed that the catalyst support be provided with at least one oxide of an element selected from the group consisting of Li, P, Ca, V, Cr, Mn, Fe, Sr, Nb, Ta, W, La and the rare earth metals is doped.

VAM shell catalyst, process for its preparation and its use

Die vorliegende Erfindung betrifft einen Schalenkatalysator zur Herstellung von Vinylacetat-Monomer (VAM), umfassend einen mit Pd und Au beladenen porösen, als Formkörper ausgebildeten Katalysatorträger auf der Basis eines natürlichen Schichtsilikates, insbesondere auf der Basis eines säurebehandeltator für die Herstellung von VAM bereitzustellen, der sich durch eine verhältnismäßig hohe VAM-Selektivität sowie eine hohe Aktivität auszeichnet, wird vorgeschlagen, dass der Katalysatorträger eine Oberfläche von kleiner als 130 m<SUP>2</SUP>/g aufweist. The present invention relates to a coated catalyst for the production of vinyl acetate monomer (VAM), comprising a loaded with Pd and Au porous, formed as a shaped catalyst support based on a natural phyllosilicate, in particular on the basis of an acid treatment for the preparation of VAM to provide is characterized by a relatively high VAM selectivity and high activity, it is proposed that the catalyst support has a surface area of less than 130 m <SUP> 2 </ SUP> / g.

Pd/Au-Schalenkatalysator enthaltend HfO2, Verfahren zu dessen Herstellung sowie dessen Verwendung

Die vorliegende Erfindung betrifft einen Schalenkatalysator für die Herstellung von Vinylacetat-Monomer, umfassend einen oxidischen porösen Katalysatorträger mit einer äußeren Schale, enthaltend metallisches Pd und Au, wobei die Gerüststruktur des porösen Katalysatorträgers Hafniumoxideinheiten enthält. Dieser Schalenkatalysator ist für die Herstellung von VAM geeignet und zeichnet sich durch eine verhältnismäßig hohe Aktivität und VAM-Selektivität aus und behält über verhältnismäßig lange Standzeiten hinweg diese Aktivität und Selektivität bei. Außerdem betrifft die vorliegende Erfindung ein Verfahren zur Herstellung des Schalenkatalysators.

Process for the preparation of a coated catalyst and coated catalyst

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Schalenkatalysators, der einen porösen Katalysatorträger-Formkörper mit einer äußeren Schale umfasst, in welcher zumindest eine katalytisch aktive Spezies enthalten ist. Um ein Schalenkatalysator-Herstellungsverfahren bereitzustellen, mittels welchem Schalenkatalysatoren hestellbar sind, die über einen verhältnismäßig großen Bereich ihrer Schalendicke hinweg eine weitgehend einheitliche Konzentration an katalytisch aktiver Spezies aufweisen und die eine weitgehend einheitliche Schalendicke aufweisen, wird vorgeschlagen, ein Verfahren unter Nutzung einer Vorrichtung (10), die eingerichtet ist, mittels eines Prozessgases (40) ein Fließbett von Katalysator-Formkörpern zu erzeugen, in welchem die Katalysatorträger-Formkörper elliptisch oder toroidal umlaufen, vorzugsweise toroidal, umfassend die Schritte des a) Beschickens der Vorrichtung (10) mit Katalysatorträger-Formkörpern und Erzeugens eines Katalysatorträger-Formkörper-Fließbettes mittels eines Prozessgases (40), wobei die Katalysatorträger-Formkörper in dem Fließbett elliptisch oder toroidal umlaufen, vorzugsweise toroidal; b) Imprägnierens einer äußeren Schale der Katalysatorträger-Formkörper mit einer katalytisch aktiven Spezies oder einem Vorläufer davon durch Besprühen der in dem Fließbett elliptisch oder toroidal umlaufenden Katalysatorträger-Formkörper mit einer eine katalytisch aktive Spezies oder einem Vorläufer davon enthaltenden ... The present invention relates to a process for producing a coated catalyst comprising a porous catalyst support molded body having an outer shell in which at least one catalytically active species is contained. In order to provide a shell catalyst production process by means of which shell catalysts can be prepared which have a substantially uniform concentration of catalytically active species over a relatively large range of shell thickness and which have a substantially uniform shell thickness, it is ...

Zirkoniumoxid-dotierter VAM-Schalenkatalysator, Verfahren zu dessen Herstellung sowie dessen Verwendung

Die vorliegende Erfindung betrifft einen Schalenkatalysator für die Herstellung von Vinylacetat-Monomer (VAM), umfassend einen porösen Katalysatorträger-Formkörper mit einer äußeren Schale, in welcher metallisches Pd und Au enthalten sind. Um einen Schalenkatalysator für die Herstellung von VAM bereitzustellen, der sich durch eine verhältnismäßig hohe Aktivität und VAM-Selektivität auszeichnet sowie über verhältnismäßig lange Standzeiten hinweg diese Aktivität und Selektivität beibehält, wird vorgeschlagen, dass der Katalysatorträger-Formkörper zumindest im Bereich der äußeren Schale aus einer ein natürliches Schichtsilikat umfassenden Matrix gebildet ist, insbesondere aus einer einen säurebehandelten kalzinierten Betonit umfassenden Matrix, in welcher Zirkoniumoxid(ZrO<SUB>2</SUB>)-Partikel gleichmäßig verteilt enthalten sind.

SHELL CATALYST, PROCESS FOR THE PREPARATION THEREOF AND USE OF SAID CATALYST.

La présente invention concerne un catalyseur en coquille, un procédé pour sa préparation ainsi que l'utilisation de ce catalyseur en coquille. The present invention relates to a shell catalyst, a process for its preparation as well as the use of this shell catalyst.

NEW REACTOR SYSTEM FOR THE PRODUCTION OF MALEIC ACID ANHYDRIDE BY CATALYTIC OXIDATION OF N-BUTANE

Die Erfindung betrifft ein Reaktorsystem zur Herstellung von Maleinsäureanhydrid durch katalytische Oxidation von n-Butan, umfassend mindestens eine Reaktorröhre mit einem Innendurchmesser größer 23 mm, die mit Katalysatorpartikeln befüllt ist, dadurch gekennzeichnet, dass in der befüllten Reaktorröhre das Verhältnis der spezifischen geometrischen Partikeloberfläche der Katalysatorpartikel zur Querschnittsfläche der Reaktorröhre gleich oder kleiner als 2,5 g-1ist. Die Erfindung betrifft des Weiteren ein Verfahren zur Herstellung von Maleinsäureanhydrid durch katalytische Oxidation von n-Butan, wobei ein Gemisch aus Sauerstoff und n-Butan durch ein erfindungsgemäßes Reaktorsystem geleitet wird und die mindestens eine Reaktorröhre bei erhöhter Temperatur vorliegt. Die Erfindung betrifft außerdem die Verwendung einer Reaktorröhre mit einem Innendurchmesser größer 23 mm zur Herstellung von Maleinsäureanhydrid durch die selektive katalytische Oxidation von n-Butan mit Katalysatorpartikeln, die eine geometrische Oberfläche von mehr als 2 cm2aufweisen The invention relates to a reactor system for the production of maleic anhydride by catalytic oxidation of n-butane, comprising at least one reactor tube with an inner diameter greater than 23 mm, which is filled with catalyst particles, characterized in that the ratio of the specific geometric particle surface area of the catalyst particles in the filled reactor tube to the cross-sectional area of the reactor tube is equal to or less than 2.5 g-1. The invention also relates to a method for producing maleic anhydride by catalytic oxidation of n-butane, a mixture of oxygen and n-butane being passed through a reactor system according to the invention and the at least one reactor tube being at an elevated temperature. The invention also relates to the use of a reactor tube with an internal diameter greater than 23 mm for the production of maleic anhydride by the selective catalytic oxidation of n-butane with catalyst particles ...

Catalyst material for the oxidation of hydrocarbons

A catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, in particular for the selective oxidation of propane to acrylic acid, is specified, comprising a) molybdenum (Mo), b) vanadium (V), c) niobium (Nb), d) tellurium (Te), e) nickel (Ni), f) tungsten (W) and g) manganese (Mn), in which the molar ratio of at least one element, which is selected from nickel, tungsten and manganese, to molybdenum lies in the range 0.01 to 0.2, more preferably 0.05 to 0.15 and particularly preferably from 0.0025:1 to 0.3:1. Furthermore, a catalyst for the oxidation and/or oxidative dehydrogenation of hydrocarbons, a use of the catalyst material or of the catalyst, a method for producing a catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons and a method for the selective oxidation of propane to acrylic acid is specified.

Use of a device for producing a coated catalyst and coated catalyst

Schalenkatalysator, umfassend einen porösen Katalysatorträger-Formkörper sowie zumindest eine katalytisch aktive Spezies, die in einer äußeren Schale des Katalysatorträger-Formkörpers enthalten ist, dadurch gekennzeichnet, dass der Schalenkatalysator ein Element einer Charge einer Vielzahl von Schalenkatalysatoren ist, wobei das Verhältnis der Standardabweichung der Schalendicken der Schalenkatalysatoren der Charge zum Mittelwert der Schalendicken der Schalenkatalysatoren der Charge kleiner/gleich 20 % ist, vorzugsweise kleiner/gleich 15 %, bevorzugt kleiner/gleich 12 % und mehr bevorzugt kleiner/gleich 10 % oder 3 bis 18 %, vorzugsweise 3 bis 15 % und der Katalysatorträger-Formkörper auf der Basis eines natürlichen Schichtsilikats, insbesondere eines kalzinierten säurebehandelten Bentonits, gebildet ist. Coated catalyst comprising a porous catalyst support shaped body and at least one catalytically active species contained in an outer shell of the catalyst support shaped body, characterized in that the coated catalyst is an element of a batch of a plurality of coated catalysts, the ratio of the standard deviation of the shell thicknesses of the batch of coated catalysts to the mean value of the shell thicknesses of the batch of coated catalysts is less than/equal to 20%, preferably less than/equal to 15%, preferably less than/equal to 12% and more preferably less than/equal to 10% or 3 to 18%, preferably 3 to 15 % and the catalyst support shaped body is formed on the basis of a natural layered silicate, in particular a calcined acid-treated bentonite.

Pre-goldplating of pd-au-coated shell catalysts

Catalyst support with increased thermal conductivity

Katalysatorträger, insbesondere für den Einsatz in der Synthese von Vinylacetat-Monomer, umfassend eine offenporige Matrix, die aus einem einen säurebehandelten kalzinierten Bentonit enthaltenden Material gebildet ist, dadurch gekennzeichnet, dass in der Matrix elementarer Kohlenstoff verteilt enthalten ist. Catalyst support, in particular for use in the synthesis of vinyl acetate monomer, comprising an open-pore matrix which is formed from a material containing an acid-treated calcined bentonite, characterized in that elemental carbon is contained in the matrix in a distributed manner.

Catalyst arrangement with optimized void fraction for the production of phthalic acid anhydride

Catalyst for oxidizing methanol into formaldehyde

The invention relates to a supported catalyst comprising a molded support and a layer that is made of a metal oxide of a main group metal, an early transition metal, or a lanthanoid, is arranged on the molded support, and is composed of individual particles. An oxide composition, the surface density of which corresponds at least to a monolayer and which contains molybdenum and/or vanadium and/or iron, is provided on the layer or on the individual particles. The invention further relates to the use of said catalyst for reacting methanol into formaldehyde.

SHELL CATALYST, PROCESS FOR ITS MANUFACTURE AND USE.

Die vorliegende Erfindung betrifft einen Schalenkatalysator, ein Verfahren zu dessen Herstellung sowie die Verwendung des erfindungsgemäben Schalenkatalysator. The present invention relates to a coated catalyst, a process for its production and the use of the coated catalyst according to the invention.

Catalyst carrier, useful to prepare e.g. shell-type catalyst, comprises open-porous matrix formed from material containing natural silicate layer, where the matrix surface is portion wise coated with coating material containing graphite

Catalyst carrier preferably for the production of shell-type catalysts, which is useful in the synthesis of vinyl acetate monomer, comprises an open-porous matrix, which is formed from a material containing natural silicate layer, preferably from an acid-treated calcinated bentonite containing material, where the surface of the matrix is portion wise coated with a coating material containing graphite. An independent claim is included for the preparation of the catalyst carrier comprising providing the catalyst carrier structure; separating the graphitized organic material from at least a part of the surface of the matrix; and graphitizing the separated organic material.

SURFACE OPTIMIZED CATALYST ARRANGEMENT FOR PHTALIC ANHYDRIDE PRODUCTION, ITS USE AND PROCESS TO PREPARE PHTALIC ANHYDRIDE BY GASEOUS PHASE OXIDATION OF AROMATIC HYDROCARBONS

arranjo de conversor catalítico com superfície otimizada para produção de anidrido ftálico. a invenção refere-se a um arranjo de conversor catalítico para produzir anidrido ftálico por meio de oxidação em fase gasosa de hidrocarbonetos aromáticos, compreendendo um reator com um lado de entrada de gases para um gás reagente, um lado de saída de gases para um gás de produto, uma primeira camada de conversor catalítico, feita de elementos conversores catalíticos, e pelo menos uma segunda camada de conversor catalítico feita de elementos conversores catalíticos. a primeira camada de conversor catalítico está disposta no lado de entrada de gases, e a segunda camada de conversor cata-lítico está disposta a jusante da primeira camada de conversor catalítico no sentido do fluxo de gás. os elementos conversores catalíticos possuem uma camada externa de um composto ativo. a invenção é caracterizada pelo fato de que o teor de composto ativo na primeira camada do conversor analítico e/ou na segunda camada do conversor catalítico é inferior a 7% em peso, com base no peso total dos elementos conversores analíticos, e a razão entre a superfície total do composto ativo e o volume da camada do conversor analítico é de preferência 10.000 cm-1 a 20.000 cm-1, sendo especialmente preferível de 12.000 cm-1 a 16.000cm-1, em cada camada do conversor catalítico. surface optimized catalytic converter arrangement for phthalic anhydride production. The invention relates to a catalytic converter arrangement for producing phthalic anhydride by means of gas phase oxidation of aromatic hydrocarbons, comprising a reactor with a gas inlet side for a reactant gas, a gas outlet side for a gas of product, a first catalytic converter layer made of catalytic converting elements, and at least a second catalytic converter layer made of catalytic converting elements. the first catalytic converter layer is arranged on the gas inlet side, and the second catalytic converter layer is arranged downstream of the ...

Reactor concept and process for preparing ethylene oxide from ethanol

The invention relates to a catalyst arrangement for preparation of ethylene oxide from ethanol, comprising a first catalyst [1] which is suitable for dehydration of ethanol to ethylene and is in direct fluid connection to a second catalyst [2] suitable for oxidation of ethylene to ethylene oxide with oxygen, characterized in that at least the first catalyst [1] is configured as a fixed catalyst bed. The invention also relates to a process for preparing ethylene oxide from ethanol, wherein a gas stream comprising oxygen and ethanol is guided through the catalyst arrangement according to the invention in order to obtain a product gas stream.

Synthesis of a movtenb catalyst from low-cost metal oxides

The invention relates to a method for producing a mixed oxide material, comprising the steps of: a) producing a mixture of starting compounds containing molybdenum, vanadium, niobium and tellurium-containing starting compounds as well as two chelating oxoligands, b) hydrothermally treating the mixture of starting compounds at a temperature of 100 °C to 300 °C to obtain a product suspension, c) separating and drying the solid which is contained in the product suspension resulting from step b), d) activating the solid obtained in step c) in inert gas. The invention also relates to a mixed oxide material for the oxidation of ethane, comprising the elements molybdenum, vanadium, niobium and tellurium, having the following stoichiometry: Mo1VaNbbTecOx with 0.27 < a < 0.31; 0.08 < b < 0.12; 0.08 < c < 0.12, which, when using the Cu-Kα radiation, has in the XRD spectrum diffraction reflections h, i, k and l, whose apex points are approximately at the diffraction angles (2•) 26.2° ± 0.5° (h), 27.0° ± 0.5° (i), 7.8° ± 0.5° (k) and 28.0° ± 0.5° (l), which can be produced according to the inventive method.

Shell catalyst for producing alkenyl carboxylic acid esters with improved pd and au distribution

Die vorliegende Erfindung betrifft einen Pd- und Au-haltigen Schalenkatalysator, der sich durch eine verbesserte Verteilung des Pd und Au auszeichnet. Außerdem betrifft die Erfindung auch zwei Verfahren zur Herstellung dieses Katalysators sowie ein Verfahren zur Herstellung von Vinylacetat-Monomer unter Verwendung dieses Katalysators.

Method for optimizing the activity of a phthalic anhydride catalyst

Verfahren zur Bereitstellung eines Reaktorsystems zur Herstellung von Phthalsäureanhydrid durch Gasphasenoxidation aromatischer Kohlenwasserstoffe an zumindest einem Katalysator Am,n, umfassend Katalysatorkörper, welche ein vanadiumhaltiges Aktivmaterial enthalten, wobei:- ein Rohrbündelreaktor bereitgestellt wird,- mit einer Anzahl b von Rohren, welche- einen Durchmesser D, sowie- eine Rohrlänge L aufweisen; wobei die Rohre eine Rohrwand aufweisen, welche von einem Kühlmittel umströmt wird, welches eine mittlere Kühlmitteltemperatur TKaufweist;- in den Rohren eine zumindest eine Lage Lmumfassende Katalysatorphase bereitgestellt wird, wobei die Lage Lmdurch eine Katalysator Am,nbereitgestellt wird, wobei m einen ganzzahligen Wert zwischen 1 und der maximalen Anzahl der Lagen annimmt und n ein Index von 1 bis n ist, welcher einen bestimmten Katalysator kennzeichnet, wobei die Lage Lmeine Aktivität Zm,naufweist, die von dem Katalysator Am,nbereitgestellt wird; und- durch die Rohre ein eine Gasphase bildendes Reaktionsgas geleitet wird, welches zumindest eine Reaktionskomponente enthält;- ein Modell bereitgestellt wird, welches für den Rohrbündelreaktor für die Gasphase und die Katalysatorphase in den Rohren des Rohrbündelreaktors- eine Wärmebilanz und- jeweils für die Gasphase und die Katalysatorphase eine Stoffbilanz, sowie- einen Stofftransport im Katalysator Am,nund- eine Reaktionskinetik für die Herstellung von Phthalsäureanhydrid durch Gasphasenoxidation aromatischer Kohlenwasserstoffe beschreibt;- Betriebsbedingungen des Rohrbündelreaktors festgelegt werden, indem zumindest- ein bestimmter Durchfluss des Reaktionsgases pro Rohr;- eine bestimmte Konzentration der zumindest einen Reaktionskomponente im Reaktionsgas und- eine bestimmte mittlere Kühlmitteltemperatur Tkdes Kühlmittels eingestellt werden;- ein Leistungsmerkmal bestimmt wird, welches Werte Wnannehmen kann;- mit dem Modell eine Differenz Δ ermittelt wird, indema) einer Grenzdifferenz ΔGein Wert ...

Post gilding of pd-au-coated shell catalysts

The invention relates to a method for producing a shell catalyst that is suitable for producing vinyl acetate monomer (VAM). The invention further relates to a shell catalyst that is obtainable by the method according to the invention and to the use of the shell catalyst according to the invention for producing VAM.

Method for producing mixed oxide materials containing molybdenum

The invention relates to a method for producing a mixed oxide material containing the elements molybdenum, vanadium, niobium and tellurium, comprising the following steps: a) producing a mixture from starting compounds containing molybdenum, vanadium, niobium and a tellurium-containing starting compound, present in the tellurium in the +4 oxidation state, b) hydrothermal treatment of the mixture from starting compounds at a temperature of between 100°c to 300°C, in order to obtain a product suspension, c) separating off and drying the solid material from the product suspension obtained in step b), d) activating the solid material in inert gas in order to obtain the mixed oxide material. The invention is characterized in that the tellurium-containing starting compound has a particle size D90of less than 100 µm.

METHOD AND EQUIPMENT FOR ESTABLISHING A TARGET CONNECTION

Die Erfindung schlägt ein Verfahren zur Herstellung einer Zielverbindung, bei dem ein Einsatzgemisch (A) auf eine Vielzahl parallel angeordneter Reaktionsrohre (10) eines Rohrbündelreaktors (100) verteilt und in den Reaktionsrohren (10) einer oxidativen katalytischen Umsetzung unterworfen wird, wobei die katalytische Umsetzung mittels in den Reaktionsrohren (10) hintereinander angeordneter Katalysezonen (11, 12, 13) mit unterschiedlicher Aktivität durchgeführt wird, und wobei in den Katalysezonen (11, 12, 13) jeweils ein oder mehrere katalytisch aktive Materialien und ein oder mehrere katalytisch inaktive Materialien bereitgestellt sind. Die unterschiedliche Aktivität der Katalysezonen (11, 12, 13) wird durch Bereitstellen des einen oder der mehreren katalytisch aktiven Materialien mit identischer elementarer Zusammensetzung und identischer Grundrezeptur bewirkt, wobei das eine oder die mehreren, katalytisch aktiven Materialien unter Verwendung unterschiedlicher Kalzinierintensitäten hergestellt ist oder sind. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung. The invention proposes a process for preparing a target compound, in which a feed mixture (A) is distributed over a large number of reaction tubes (10) arranged in parallel in a tube bundle reactor (100) and is subjected to an oxidative catalytic reaction in the reaction tubes (10), the catalytic reaction being by means of catalytic zones (11, 12, 13) with different activities arranged one behind the other in the reaction tubes (10), and wherein one or more catalytically active materials and one or more catalytically inactive materials are provided in each of the catalytic zones (11, 12, 13). are. The different activity of the catalytic zones (11, 12, 13) is brought about by providing the one or more catalytically active materials with identical elemental composition and identical basic recipe, the one or more catalytically active materials being produced using different calcination intensities ...

New catalyst system for producing maleic anhydride by means of the catalytic oxidation of n-butane

Method for producing a catalyst arrangement for the production of phthalic anhydride

A method for producing phthalic anhydride by catalytic gas-phase oxidation of o-xylene and/or naphthalene, carried out by means of a catalyst arrangement which has a first catalyst layer at the gas inlet side and at least one second catalyst layer after the first catalyst layer in the gas flow direction with different catalytic activity, wherein when the gas-phase oxidation is being carried out a lower maximum temperature is formed in the first catalyst layer than in the second catalyst layer. Furthermore, a method for producing the catalyst arrangement, as well as the catalyst arrangement itself.

Method and plant for producing a target compound

The invention relates to a method for producing a target compound, wherein an input mixture (A) is distributed at a temperature in a first temperature range to a plurality of parallel reaction tubes (10) of a tube bundle reactor (100), subjected to heating to a temperature in a second temperature range in first tube portions (11) of the reaction tubes (10), and subjected to an oxidative catalytic reaction in second tube portions (12) of the reaction tubes (10) located downstream of the first tube portions (11) using one or more catalysts provided in the second tube portions (12). The method is characterised in that the heating is at least partially carried out using a catalyst which is provided in the first tube portions (11) and has a light-off temperature in the first temperature range. The invention also relates to a corresponding plant.

Catalyst arrangement useful in a reactor for the oxidation of methanol to formaldehyde, comprises supported catalysts containing two catalyst beds, where the catalytic activity of the catalyst is different in each catalyst bed

The catalyst arrangement comprises supported catalysts containing two catalyst beds, where the catalytic activity of the catalyst is different in each catalyst bed. The portion of active mass of the catalyst bed is smaller than the portion of active mass of another catalyst bed. The catalyst of the catalyst beds has same catalytic activity. The portion of the active mass of the catalyst of one of the catalyst bed is 5-20 wt.% and the portion of the active mass of the catalyst of another catalyst bed is 20-50 wt.%. The catalyst arrangement comprises supported catalysts containing two catalyst beds, where the catalytic activity of the catalyst is different in each catalyst bed. The portion of active mass of the catalyst bed is smaller than the portion of active mass of another catalyst bed. The catalyst of the catalyst beds has same catalytic activity. The catalyst of the catalyst beds has same or different active mass composition, where the portion of the active mass of the catalyst of one of the catalyst bed is 5-20 wt.% and the portion of the active mass of the catalyst of the another catalyst bed is 20-50 wt.%. The molar ratio of the catalytic active element such as iron: molybdenum: vanadium in the component is 1:3:0 to 1:11:0, 1:0:3 to 1:0:11, 1:3:1 and 1:11:1 and/or 1:10:2. The catalyst arrangement has a band in Raman spectrum at 975+- 15 cm 1>. The active mass of the catalyst comprises promoter component. The carrier body of the catalyst is chemically inert and is non-porous. The catalyst beds are arranged in a tube.

Method for producing a nanocrystalline molybdenum mixed oxide

The invention relates to a method for producing a nanocrystalline molybdenum mixed oxide, to the use of said molybdenum mixed oxide as a catalyst for chemical reactions, especially a reaction of acrolein to form acrylic acid, and to a catalst containing said molybdenum mixed oxide.

Catalyst for the oxidation of hydrocarbons consisting of molybdenum, vanadium, niobium, tellurium, manganese and cobalt

A catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, in particular for the selective oxidation of propane to acrylic acid, comprising a) molybdenum (Mo), b) vanadium (V), c) niobium (Nb), d) tellurium (Te), e) manganese (Mn) and cobalt, in which the molar ratio of at least one element, which is selected from manganese and cobalt, to molybdenum lies in the range 0.01 to 0.2. Furthermore, a catalyst for the oxidation and/or oxidative dehydrogenation of hydrocarbons, a use of the catalyst material or of the catalyst, a method for producing a catalyst material for the oxidation and/or oxidative dehydrogenation of hydrocarbons, and a method for the selective oxidation of propane to acrylic acid.

Composite material containing a bismuth molybdenum nickel blend oxide or bismuth molybdenum cobalt blend oxide and SiO 2

Composite material containing a bismuth-molybdenum-nickel mixed oxide or a bismuth-molybdenum-cobalt mixed oxide and SiO2

The present invention relates to a process for producing a composite material and also the composite material itself. The composite material contains a bismuth-molybdenum-nickel mixed oxide or a bismuth-molybdenum-cobalt mixed oxide and a specific SiO2 as pore former. The present invention also relates to the use of the composite material according to the invention for producing a washcoat suspension and also a process for producing a coated catalyst using the composite material according to the invention. Furthermore, the present invention also relates to a coated catalyst which has a catalytically active shell comprising the composite material according to the invention on a support body. The coated catalyst according to the invention is used for preparing [alpha],[beta]-unsaturated aldehydes from olefins.

Method for producing a shell catalyst and corresponding shell catalyst

The invention relates to a method for producing a shell catalyst which comprises a porous molded catalyst support having an outer shell in which at least one transition metal is contained in metallic form. The aim of the invention is to provide a shell catalyst production method which allows production of supported transition metal catalysts in the form of shell catalysts that have a relatively little shell thickness. The method according to the invention makes use of a device (10) which is adapted to cause the molded catalyst supports to circulate by means of a reducing process gas (40). Said method comprises the following steps: a) feeding molded catalyst supports to the device (10) and causing the molded catalyst supports to circulate by means of a reducing process gas (40); b) impregnating an outer shell of the molded catalyst supports with a transition metal precursor compound by spraying the circulating molded catalyst supports with a solution that contains the transition metal precursor compound; c) converting the metal component of the transition metal precursor compound to the metallic form by reduction with the process gas (40); d) drying the molded catalyst supports that are sprayed with said solution.

Method for the production of a nanocrystalline molybdenum mixed oxide

A method for the production of a nanocrystalline molybdenum mixed oxide, the use of the molybdenum mixed oxide as catalyst for chemical conversions, in particular for a conversion of acrolein to acrylic acid as well as a catalyst that contains the molybdenum mixed oxide.

Catalyst Containing Titanium Dioxide, Particularly for the Production of Phthalic Anhydride

The present invention relates to the use of titanium dioxide having a content of sulphur, calculated as elemental sulphur, of less than about 1000 ppm and a BET surface area of at least 5 m 2 /g for preparing a catalyst for gas phase oxidation of hydrocarbons, especially for gas phase oxidation of o-xylene and/or naphthalene. Also described is a preferred process for preparing such a catalyst.

Synthesis of a MoVNbTe catalyst with reduced content of niobium and tellurium and higher activity for the oxidative dehydrogenation of ethane

Die Erfindung betrifft ein Mischoxidmaterial umfassend die Elemente Molybdän, Vanadium, Niob und Tellur, das im XRD, bei Verwendung der Cu-Kα-Strahlung, Beugungsreflexe h, i, k und 1 aufweist, deren Scheitelpunkte ungefähr bei den Beugungswinkeln (2θ) 26,2° ± 0,5° (h) , 27,0° ± 0,5° (i), 7,8° ± 0,5° (k) und 28,0° ± 0,5° (1) liegen, dadurch gekennzeichnet, dass es folgende Stöchiometrie aufweist:a = 0,2 bis 0,35,b = größer 0 bis 0,08,c = größer 0 bis 0,08,n = eine Zahl, die durch die Wertigkeit und Häufigkeit der von Sauerstoff verschiedenen Elemente in (I) bestimmt wird. The invention relates to a mixed oxide material comprising the elements molybdenum, vanadium, niobium and tellurium, which in the XRD, when using the Cu-Kα radiation, diffraction reflections h, i, k and 1 whose vertices are approximately at the diffraction angles (2θ) 26, 2 ° ± 0.5 ° (h), 27.0 ° ± 0.5 ° (i), 7.8 ° ± 0.5 ° (k) and 28.0 ° ± 0.5 ° (1) , characterized in that it has the following stoichiometry: a = 0.2 to 0.35, b = greater than 0 to 0.08, c = greater than 0 to 0.08, n = a number determined by the valency and frequency of non-oxygen elements in (I) is determined.

Method for gas phase oxidation of hydrocarbons

Die Erfindung betrifft ein Verfahren zur Gasphasenoxidation von aromatischen Kohlenwasserstoffen unter Einsatz einer Katalysatorschüttung gerichtet, wobei die Katalysatorschüttung in einem Wärmebett gelagert ist und wobei das Verfahren Folgendes aufweist: a) Einstellen der Temperatur des Wärmebetts auf 365°C bis 395°C; b) Leiten von 0,5 bis 5,0 Nm 3 /h Luft durch die Katalysatorschüttung, bis sich die Temperatur des Wärmebetts um 5°C bis 10°C verringert hat, c) Leiten von 0,5 bis 5,0 Nm 3 /h Luft mit einer Kohlenwasserstoff-Beladung von 10 bis 110 g/Nm 3 Luft durch die Katalysatorschüttung, so dass sich, in Strömungsrichtung der Luft gesehen, in den letzten 10 bis 25 % derselben ein Hotspot mit einer Temperatur von 430°C bis kleiner 470°C ausbildet.

Shell catalyst, process for its preparation and use.

SHELL CATALYST, PROCESS FOR THE PREPARATION THEREOF AND USE OF SAID CATALYST.

La présente invention concerne un catalyseur en coquille, un procédé pour sa préparation ainsi que l'utilisation de ce catalyseur en coquille. The present invention relates to a shell catalyst, a process for its preparation and the use of this shell catalyst.

Method for producing mixed oxide materials containing molybdenum

The invention relates to a method for producing a mixed oxide material containing the elements molybdenum, vanadium, niobium and tellurium, comprising the following steps: a) producing a mixture from starting compounds containing molybdenum, vanadium, niobium and a tellurium-containing starting compound, present in the tellurium in the +4 oxidation state, b) hydrothermal treatment of the mixture from starting compounds at a temperature of between 100°c to 300°C, in order to obtain a product suspension, c) separating off and drying the solid material from the product suspension obtained in step b), d) activating the solid material in inert gas in order to obtain the mixed oxide material. The invention is characterized in that the tellurium-containing starting compound has a particle size D90of less than 100 µm.

Method for producing a catalyst arrangement for preparing phthalic anhydride

The invention relates to a method for preparing phthalic anhydride by way of gas-phase catalytic oxidation of o-xylene and/or naphthalene, wherein the method is carried out by means of a catalyst arrangement which comprises a first catalyst layer at the gas entry side and at least one second catalyst layer having a different catalytic activity downstream of the first catalyst layer in the gas through-flow direction. The method is characterised in that when carrying out the gas-phase oxidation a maximum temperature forms in the first catalyst layer that is lower than the maximum temperature in the second catalyst layer. The invention further relates to a method for producing the catalyst arrangement according to the invention and to the catalyst arrangement itself according to the invention.

PD/AU SHELL CATALYST CONTAINING Hf02, PROCESSES FOR THE PREPARATION AND USE THEREOF

A shell catalyst for the preparation of vinyl acetate monomer, comprising an oxidic porous catalyst support with an outer shell, containing metallic Pd and Au, wherein the framework structure of the porous catalyst support contains hafnium oxide units. This shell catalyst is suitable for the preparation of VAM and is characterized by a relatively high activity and VAM selectivity and maintains this activity and selectivity over relatively long service lives. Also, processes for the preparation and use of the shell catalyst.

Gold plating of Pd-Au coated shell catalysts

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Schalenkatalysators, der zur Herstellung von Vinylacetatmonomer (VAM) geeignet ist. Die vorliegende Erfindung betrifft zudem einen Schalenkatalysator, der durch das erfindungsgemäße Verfahren erhältlich ist sowie die Verwendung des erfindungsgemäßen Schalenkatalysators zur Herstellung von VAM. The present invention relates to a process for the preparation of a coated catalyst suitable for the production of vinyl acetate monomer (VAM). The present invention also relates to a shell catalyst obtainable by the process according to the invention and to the use of the shell catalyst according to the invention for the production of VAM.

Alkali metal-modified vanadium-phosphorus oxide (VPO) catalyst

Die vorliegende Erfindung betrifft einen Katalysator, der ein Vanadium-Phosphor-Oxid und ein Alkalimetall enthält, worin der Gewichtsanteil an Alkalimetall im Vanadium-Phosphor-Oxid im Bereich von 10 bis 400 ppm liegt, bezogen auf das Gesamtgewicht des Vanadium-Phosphor-Oxids, ein Verfahren zu dessen Herstellung sowie die Verwendung des Katalysators zur Gasphasenoxidation von Kohlenwasserstoffen, insbesondere zur Herstellung von Maleinsäureanhydrid. The present invention relates to a catalyst containing a vanadium-phosphorus oxide and an alkali metal, wherein the weight proportion of alkali metal in the vanadium-phosphorus oxide is in the range of 10 to 400 ppm, based on the total weight of the vanadium-phosphorus oxide, a process for its preparation and the use of the catalyst for the gas phase oxidation of hydrocarbons, in particular for the production of maleic anhydride.

Post—gilding of pd-au-coated shell catalysts

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Schalenkatalysators, der zur Herstellung von Vinylacetatmonomer (VAM) geeignet ist. Die vorliegende Erfindung betrifft zudem einen Schalenkatalysator, der durch das erfindungsgemäße Verfahren erhältlich ist sowie die Verwendung des erfindungsgemäßen Schalenkatalysators zur Herstellung von VAM.

Pre-impregnation of shell catalyst using acetate

【課題】アルケニルカルボン酸エステルの合成のために適したシェル触媒を製造する方法に関し、特に、アセチルオキシレーションによって、エチレンから酢酸ビニルモノマー（ＶＡＭ）及びプロピレンから酢酸アリルを製造する方法に関する。 【解決手段】酢酸塩を用いた前浸漬による方法で得られたシェル触媒、及び、アルケニルカルボン酸エステル、特に酢酸アリルモノマーを製造するための、シェル触媒またはシェル触媒の使用に関する。 【選択図】図１

Method for applying a wash coat suspension to a carrier structure

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 ( 10 ) set up to produce, by means of a process gas ( 40 ), a fluid bed of support structures in which the support structures circulate elliptically or toroidally, the method comprising the steps of: a) charging the device ( 10 ) with support structures and producing a support-structure fluid bed by means of a process gas ( 40 ), wherein the support structures circulate in the fluid bed elliptically or toroidally, preferably toroidally; b) impregnating the support structures with a washcoat suspension by spraying the support structures circulating elliptically or toroidally in the fluid bed with the washcoat suspension; c) drying the support structures sprayed with the washcoat suspension; and d) optionally calcining the support structures loaded with the solids contents of the washcoat suspension.

Verfahren und anlage zur herstellung einer zielverbindung

Die Erfindung schlägt ein Verfahren zur Herstellung einer Zielverbindung, bei dem ein Einsatzgemisch (A) auf einer Temperatur in einem ersten Temperaturbereich auf eine Vielzahl parallel angeordneter Reaktionsrohre (10) eines Rohrbündelreaktors (100) verteilt, in ersten Rohrabschnitten (11) der Reaktionsrohre (10) einer Erwärmung auf eine Temperatur in einem zweiten Temperaturbereich unterworfen, und in stromab der ersten Rohrabschnitte (11) angeordneten zweiten Rohrabschnitten (12) der Reaktionsrohre (10) unter Verwendung eines oder mehrerer, in den zweiten Rohrabschnitten (12) angeordneter Katalysatoren einer oxidativen katalytischen Umsetzung unterworfen wird, vor. Sie ist dadurch gekennzeichnet, dass ein aus den zweiten Rohrabschnitten (12) ausströmendes Gasgemisch in stromab der zweiten Rohrabschnitte (12) angeordneten dritten Rohrabschnitten (13) mit einem in den dritten Rohrabschnitten (13) angeordneten Katalysator in Kontakt gebracht wird, der eine volumetrische Aktivität aufweist, die unterhalb der höchsten volumetrischen Aktivität 15 des einen oder der mehreren in den zweiten Rohrabschnitten (12) angeordneten Katalysatoren liegt, und bei dem ein aus den dritten Rohrabschnitten (13) ausströmendes Gasgemisch ohne weitere katalytische Umsetzung dem Rohrbündelreaktor (100) entnommen wird. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung.

Verfahren und anlage zur herstellung einer zielverbindung

Die vorliegende Erfindung schlägt ein Verfahren zur Herstellung einer Zielverbindung vor, bei dem ein wenigstens eine Eduktverbindung enthaltendes Einsatzgemisch (A) gebildet, auf parallel angeordnete Reaktionsrohre (10) eines oder mehrerer Rohrbündelreaktoren (100) verteilt, und in den Reaktionsrohren (10) einer oxidativen katalytischen Umsetzung unterworfen wird. Es ist vorgesehen, dass dem Einsatzgemisch Wasserdampf in einer Menge zugegeben wird, die derart bemessen ist, dass ein Wasserdampfanteil des Einsatzgemischs 5 bis 95 Vol.-% beträgt, dem Einsatzgemisch Sauerstoff in Form eines zumindest 95 Vol.-% Sauerstoff enthaltenden Fluids zugegeben wird, und die oxidative katalytische Umsetzung unter Verwendung eines oder mehrerer, die Metalle Molybdän, Vanadium, Niob und optional Tellur enthaltender Katalysatoren durchgeführt wird. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung.

Verfahren und anlage zur herstellung einer zielverbindung

Die Erfindung schlägt ein Verfahren zur Herstellung einer Zielverbindung vor, bei dem ein Ethan enthaltendes Einsatzgemisch (A) auf eine Vielzahl parallel angeordneter Reaktionsrohre (10) eines Rohrbündelreaktors (100) verteilt und in den Reaktionsrohren (10) einer oxidativen katalytischen Umsetzung des Ethans unterworfen wird, wobei die katalytische Umsetzung mittels in den Reaktionsrohren (10) hintereinander angeordneter Katalysezonen (11, 12, 13) mit unterschiedlicher Aktivität durchgeführt wird, und wobei in den Katalysezonen (11, 12, 13) jeweils ein oder mehrere katalytisch aktive Materialien und ein oder mehrere katalytisch inaktive Materialien bereitgestellt sind. Die unterschiedliche Aktivität der Katalysezonen (11, 12, 13) wird durch Bereitstellen des einen oder der mehreren katalytisch aktiven Materialien mit identischer oder im Wesentlichen identischer Grundrezeptur bewirkt, wobei das eine oder die mehreren, katalytisch aktiven Materialien unter Verwendung unterschiedlicher Kalzinierintensitäten hergestellt ist oder sind. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung.

Verfahren und anlage zur herstellung einer zielverbindung

Die Erfindung schlägt ein Verfahren zur Herstellung einer Zielverbindung, bei dem ein Einsatzgemisch (A) auf einer Temperatur in einem ersten Temperaturbereich auf eine Vielzahl parallel angeordneter Reaktionsrohre (10) eines Rohrbündelreaktors (100) verteilt, in ersten Rohrabschnitten (11) der Reaktionsrohre (10) einer Erwärmung auf eine Temperatur in einem zweiten Temperaturbereich unterworfen, und in stromab der ersten Rohrabschnitte (11) angeordneten zweiten Rohrabschnitten (12) der Reaktionsrohre (10) unter Verwendung eines oder mehrerer, in den zweiten Rohrabschnitten (12) angeordneter Katalysatoren einer oxidativen katalytischen Umsetzung unterworfen wird, vor. Sie ist dadurch gekennzeichnet, dass die Erwärmung zumindest zum Teil unter Verwendung eines in den ersten Rohrabschnitten (11) angeordneten Katalysators durchgeführt wird, der eine Anspringtemperatur in dem ersten Temperaturbereich aufweist. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung.

Reaktorvorrichtung und Verfahren zur Optimierung der Messung des Temperaturverlaufs in Reaktorrohren

New catalyst system for producing maleic anhydride by means of the catalytic oxidation of n-butane

The invention relates to a catalyst system for producing maleic anhydride by means of the catalytic oxidation of n-butane, comprising at least one reactor tube, which has two catalyst layers consisting of different catalyst particles, characterized in that the geometric surface area per catalyst particle is greater in the catalyst layer that is first in the gas flow direction than in the second catalyst layer. The invention further relates to a process for producing maleic anhydride by means of the catalytic oxidation of n-butane, wherein a mixture of oxygen and n-butane is fed through the catalyst system according to the invention and the at least one reactor tube is at elevated temperature.

Process and system for producing a target compound

The present invention relates to a method for producing a target compound, in which method a feed mixture (A) containing at least one starting compound is formed, distributed over parallel reaction tubes (10) of one or more shell-and-tube reactors (100), and subjected to an oxidative catalytic reaction in the reaction tubes (10). According to the invention, water vapour is added to the feed mixture in such an amount that a water vapour proportion of the feed mixture is 5 to 95 vol.%, oxygen in the form of a fluid containing at least 95 vol.% oxygen is added to the feed mixture, and the oxidative catalytic reaction is performed using one or more catalysts containing the metals molybdenum, vanadium, niobium and optionally tellurium. The invention further relates to a corresponding system.

Új katalizátorrendszer maleinsav-anhidrid elõállításához n-bután katalitikus oxidációjával

Vpo-katalysator mit verbesserter selektivität und stabilität sowie verfahren zu dessen herstellung

Die Erfindung betrifft einen VPO-Katalysator in Form eines Formkörpers zur Oxidation von Kohlenwasserstoffen mit molekularem Sauerstoff, insbesondere zur Oxidation von Butan zu Maleinsäureanhydrid mit molekularem Sauerstoff, wobei der VPO-Katalysator zwischen 0,05 Gew.-% bis 7,0 Gew.-% Zn enthält, welches teilweise als ZnO vorliegt und bei in Transmission durchgeführter Infrarotspektroskopie eine erste Absorptionsbande mit einem Maximum zwischen 790 cm^-1 bis 810 cm^-1 und eventuell eine zweite Absorptionsbande mit einem Maximum zwischen 820 cm^-1 bis 840 cm^-1 aufweist, dadurch gekennzeichnet, dass nur die erste Absorptionsbande vorhanden ist oder die Stärke der ersten Absorptionsbande größer ist als die Stärke der zweiten Absorptionsbande. Die Erfindung betrifft des Weiteren ein Verfahren zur Herstellung eines erfindungsgemäßen VPO-Katalysators, umfassend die Schritte:a) Herstellen einer Katalysatorvorstufe enthaltend Vanadylhydrogenphosphat,b) Formen der Katalysatorvorstufe zu einem Formkörper.c) Aktivieren der Formkörper, um eine VPO-Phase auszubilden,dadurch gekennzeichnet, dass nach Schritt a) ZnO mit der Katalysatorvorstufe vermischt wird.

Verfahren zur katalytischen gasphasenoxidation von kohlenwasserstoffen und katalysereaktionsvorrichtung

Die vorliegende Erfindung betrifft ein Verfahren zur katalytischen Gasphasenoxidation von Kohlenwasserstoffen, welches umfasst: a) Bereitstellen einer Katalysereaktionsvorrichtung mit einem mit Kühlmittel gekühlten Reaktionsraum zwischen einem Gaseinlass und einem Gasauslass, und b) Leiten eines Kohlenwasserstof f-enthaltenden Reaktionsgemisches durch den Reaktionsraum in einer Gasdurchflussrichtung, dadurch gekennzeichnet, dass das Kühlmittel mit einem in der Gasdurchflussrichtung ansteigenden Temperaturprofil bereitgestellt wird; sowie eine entsprechende Katalysereaktionsvorrichtung.

Mechanically stable vpo catalyst and process for the production thereof

The invention relates to a VPO catalyst in the form of a shaped body for the oxidation of hydrocarbons with molecular oxygen, especially for the oxidation of butane to maleic anhydride with molecular oxygen, characterized in that the VPO catalyst contains ZnO. The invention further relates to a process for producing a VPO catalyst of the invention in the form of a shaped body, comprising the steps of: a) providing a reaction mixture that comprises a V(V) compound, a P(V) compound, optionally a Mo compound, a reductant and a solvent, b) reducing the V(V) compound with the reductant at least in part to vanadyl hydrogen phosphate so as to obtain a suspension of an intermediate product, c) filtering the suspension of an intermediate product from step b) so as to obtain an intermediate product, d) drying and calcining the intermediate product at a temperature of max. 300°C so as to obtain a dried intermediate product, d1) optionally mixing the dried intermediate product with graphite and/or d2) compacting the dried intermediate product, e) shaping the intermediate product from steps d) or d1) and/or d2) into particles, f) activating the particles at a temperature above 200°C, in a gas mixture consisting of nitrogen, hydrogen and water vapour, characterized in that ZnO is added after step c), but before step f).

Process and System for Producing a Target Compound

A process for producing a target compound includes forming a feed mixture containing at least one reactant compound. The feed mixture is distributed to parallel reaction tubes of one or more shell-and-tube reactors and subjected to oxidative catalytic conversion in the reaction tubes. Steam is added to the feed mixture in an amount such that a steam fraction of the feed mixture is 5 to 95 vol %, oxygen is added to the feed mixture in the form of a fluid containing at least 95 vol % oxygen, and the oxidative catalytic conversion is carried out using one or more catalysts containing the metals molybdenum, vanadium, niobium and optionally tellurium.

Method for starting up a reactor for preparing phthalic anhydride

The present invention relates to a process for starting up a reactor for preparation of phthalic anhydride by the catalytic oxidation of ortho-xylene and/or naphthalene, containing a bed of shaped catalyst bodies and within a temperature-controlled salt bath. The industrial production of phthalic anhydride from ortho-xylene and/or naphthalene is affected by selective gas phase oxidation in a shell and tube reactor cooled with a salt bath, which may contain several thousand reactor tubes. There are 4 to 5 different catalyst layers in each reactor, which are introduced into each reactor successively in axial direction.

Vpo-katalysator mit verbesserter selektivität und stabilität sowie verfahren zu dessen herstellung

Die Erfindung betrifft einen VPO-Katalysator in Form eines Formkörpers zur Oxidation von Kohlenwasserstoffen mit molekularem Sauerstoff, insbesondere zur Oxidation von Butan zu Maleinsäureanhydrid mit molekularem Sauerstoff, wobei der VPO-Katalysator zwischen 0,05 Gew.-% bis 7,0 Gew.-% Zn enthält, welches teilweise als ZnO vorliegt und bei in Transmission durchgeführter Infrarotspektroskopie eine erste Absorptionsbande mit einem Maximum zwischen 790 cm-1 bis 810 cm-1 und eventuell eine zweite Absorptionsbande mit einem Maximum zwischen 820 cm-1 bis 840 cm-1 aufweist, dadurch gekennzeichnet, dass nur die erste Absorptionsbande vorhanden ist oder die Stärke der ersten Absorptionsbande größer ist als die Stärke der zweiten Absorptionsbande. Die Erfindung betrifft des Weiteren ein Verfahren zur Herstellung eines erfindungsgemäßen VPO-Katalysators, umfassend die Schritte: a) Herstellen einer Katalysatorvorstufe enthaltend Vanadylhydrogenphosphat, b) Formen der Katalysatorvorstufe zu einem Formkörper. c) Aktivieren der Formkörper, um eine VPO-Phase auszubilden, dadurch gekennzeichnet, dass nach Schritt a) ZnO mit der Katalysatorvorstufe vermischt wird.

Catalyst Comprising Nanocarbon Strutures for the Production of Unsaturated Hydrocarbons

The present invention relates to catalysts comprising at least one support and at least one layer applied to said support, said layer containing a) 20 to 95% by weight of at least one aluminum, silicon, titanium or magnesium oxide compound or a silicon carbide or a carbon support or mixtures thereof, and b) 5 to 50% by weight of at least one nanocarbon. The catalysts can be used to produce unsaturated hydrocarbons by means of the oxidative dehydrogenation of alkylaromatics, alkenes and alkanes in the gas phase.

Process and system for preparing a target compound

The invention relates to a process for preparing a target compound, in which an ethane-containing feed mixture (A) is distributed across a plurality of parallel reaction tubes (10) of a tube reactor (100) and subjected to an oxidative catalytic conversion of the ethane in the reaction tubes (10), wherein the catalytic conversion is carried out by means of catalysis zones (11, 12, 13), having different activity, arranged one behind the other in the reaction tubes (10), and wherein in each case one or more catalytically active materials and one or more catalytically inactive materials are provided in the catalysis zones (11, 12, 13). The different activity of the catalysis zones (11, 12, 13) is brought about by providing the one or more catalytically active materials with an identical or substantially identical basic formulation, wherein the one or more catalytically active materials is or are prepared using different calcination intensities. The invention also relates to a corresponding system.

Process and system for preparing a target compound

The invention relates to a process for preparing a target compound, wherein a charge mixture (A) at a temperature in a first temperature range is distributed over a plurality of parallel reaction tubes (10) of a tube-bundle reactor (100); undergoes heating to a temperature in a second temperature range in first tube portions (11) of the reaction tubes (10); and undergoes an oxidative catalytic conversion in second tube portions (12) of the reaction tubes (10), downstream of the first tube portions (11), using one or more catalysts situated in the second tube portions (12). The invention is characterised in that, in third tube portions (13) situated downstream of the second tube portions (12), a gas mixture flowing out of the second tube portions (12) is brought into contact with a catalyst situated in the third tube portions (13), which catalyst has a volumetric activity that is below the highest volumetric activity of the one or more catalysts situated in the second tube portions (12), and wherein a gas mixture flowing out of the third tube portions (13) is removed from the tube-bundle reactor (100) without additional catalytic conversion. The invention also relates to a corresponding system.

Process and System for Preparing a Target Compound

A method for producing a target compound includes distributing a feed mixture at a temperature in a first temperature range to a plurality of parallel reaction tubes of a shell-and-tube reactor, and subjecting the feed mixture in first tube sections of the reaction tubes to heating to a temperature in a second temperature range and in second tube sections of the reaction tubes arranged downstream of the first tube sections to oxidative catalytic conversion using one or more catalysts. A gas mixture flowing out of the second tube sections is brought into contact in third tube sections arranged downstream of the second tube sections with a catalyst which has a volumetric activity below the highest volumetric activity of the one or the plurality of catalysts arranged in the second tube sections. A gas mixture from the third tube sections is withdrawn from the shell-and-tube reactor without further catalytic conversion.

Method and plant for producing a target compound

The invention relates to a method for producing a target compound, wherein an input mixture (A) is distributed at a temperature in a first temperature range to a plurality of parallel reaction tubes (10) of a tube bundle reactor (100), subjected to heating to a temperature in a second temperature range in first tube portions (11) of the reaction tubes (10), and subjected to an oxidative catalytic reaction in second tube portions (12) of the reaction tubes (10) located downstream of the first tube portions (11) using one or more catalysts provided in the second tube portions (12). The method is characterised in that the heating is at least partially carried out using a catalyst which is provided in the first tube portions (11) and has a light-off temperature in the first temperature range. The invention also relates to a corresponding plant.

Method and Plant for Producing a Target Compound

A method for producing a target compound, includes distributing feed mixture at a temperature in a first temperature range to a plurality of parallel reaction tubes of a shell-and-tube reactor. The method further includes subjecting the feed mixture in first tube sections of the reaction tubes to heating to a temperature in a second temperature range, and in second tube sections of the reaction tubes arranged downstream of the first tube sections to oxidative catalytic conversion using one or more catalysts arranged in the second tube sections. The heating is performed, at least in part, using a catalyst arranged in the first tube sections and having a light-off temperature in the first temperature range.

Verfahren zur herstellung eines vpo-katalysators

Ｖｐｏ触媒の製造方法

【課題】炭化水素の気相酸化のための、特に無水マレイン酸の製造のための、改善されたＶＰＯ触媒の製造方法の提供。【解決手段】ａ）Ｖ（Ｖ）化合物、Ｐ（Ｖ）化合物、Ｍｏ化合物、還元剤および溶媒を含む反応混合物を供するステップ、ｂ）前記還元剤でＶ（Ｖ）化合物を少なくとも部分的にリン酸水素バナジルに還元して、中間生成物懸濁物を得るステップ、ｃ）ステップｂ）からの中間生成物懸濁物を濾過して中間生成物を得るステップ、ｄ）前記中間生成物を最大３５０℃の温度で乾燥して、乾燥した中間生成物を得るステップ、およびｅ）前記の乾燥した中間生成物を２００℃超の温度で活性化するステップを含む、モリブデンおよびピロリン酸バナジル相を含むＶＰＯ触媒を製造する方法で、ステップａ）において、存在する水が反応混合物の重量を基準として最大０．２重量％であり、かつ、ステップｂ）における還元の間に水が除去されないことを特徴とする方法。【選択図】図１

用於製造烯基羧酸酯之銅促進殼催化劑

本發明係關於一種用於製造殼催化劑之方法，該殼催化劑適合於合成烯基羧酸酯，尤其適合於藉助氧化乙醯化自乙烯製造乙酸乙烯酯單體(VAM)或自丙烯製造乙酸烯丙酯單體。本發明亦關於一種可藉由本發明之方法而獲得的殼催化劑，以及使用本發明之方法製造之殼催化劑的用途，或本發明之殼催化劑用於製造烯基羧酸酯，尤其乙酸乙烯酯單體(VAM)及乙酸烯丙酯單體的用途。

Verfahren zur Herstellung eines Schalenkatalysators

Verfahren zur Herstellung eines mit Pd und/oder Au beladenen Schalenkatalysators

Verfahren zur herstellung eines schalenkatalysators

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Schalenkatalysators, umfassend einen porösen Katalysatorträger-Formkörper mit einer äußeren Schale, in welcher zumindest ein Übergangsmetall in metallischer Form enthalten ist. Um ein Verfahren bereitzustellen, mittels welchem Schalenkatalysatoren herstellbar sind, die eine verhältnismäßig dünne Schale aufweisen, wird ein Verfahren vorgeschlagen, umfassend die Schritte des: a) Bereitstellens eines porösen Katalysatorträger-Formkörpers; b) Imprägnierens der äußeren Schale des Katalysatorträger-Formkörpers mit einer Übergangsmetall-Salzverbindung mittels einer ersten Lösung, in welcher die Übergangsmetall-Salzverbindung enthalten ist; c) Imprägnierens des Katalysatorträger-Formkörpers mit einer zweiten Lösung, in welcher eine Säure oder ein Salz einer Carbonsäure enthalten ist, wobei die zweite Lösung eine Fällung der Metallkomponente der Übergangsmetall-Salzverbindung bewirkt; d) Reduzierens der gefällten Metallkomponente in die metallische Form.