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WO/2001/041926A1 |
A process of activating a fresh catalyst or regenerating a deactivated catalyst which is used in a hydro-oxidation process, preferably, the hydro-oxidation of an olefin in the presence of oxygen and hydrogen to an olefin oxide. The hydro...
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WO/2001/040408A1 |
The invention concerns a method for producing aromatic compounds in catalyst mobile bed comprising at least a first step which essentially consists in the dehydrogenation of naphthenes in the presence of hydrogen in a molar ratio (H2)¿1...
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WO/2001/040407A1 |
The invention concerns a method for producing aromatic compounds from a hydrocarbon cut using a catalyst which preferably circulates in mobile bed, said method comprising at least the following successive steps carried out at least in a ...
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WO/2001/038274A1 |
A process for producing vinyl chloride monomer from ethylene and ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is only...
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WO/2001/038273A1 |
This invention is a process for producing vinyl chloride from an ethylene-containing feed, oxygen, and a chlorine source in the presence of a catalyst. The process permits direct production of vinyl chloride in a single reactor system, a...
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WO/2001/038275A1 |
A process for the dehydrohalogenation of halogenated alkanes involving contacting a halogenated alkane having three or more carbon atoms with a rare earth halide or rare earth oxyhalide catalyst under process conditions sufficient to pre...
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WO/2001/038271A1 |
An oxidative halogenation process involving contacting a hydrocarbon, for example, ethylene, or a halogenated hydrocarbon with a source of halogen, such as hydrogen chloride, and a source of oxygen in the presence of a catalyst so as to ...
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WO/2001/038272A1 |
A process for producing vinyl chloride monomer from ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is reacted away in a...
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WO/2001/037993A1 |
Process to separate a rhodium/phosphite ligand complex and free phosphite ligand from a hydroformylation mixture also containing high boiling hydroformylation compounds by contacting said mixture with a polymeric membrane, wherein said m...
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WO/2001/036352A1 |
A process is disclosed for regenerating catalyst used in a process for synthesizing hydrocarbons. The synthesis process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintain...
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WO/2001/026811A1 |
A process for the preparation of a catalyst useful for conducting carbon monoxide hydrogenation reactions, especially Fischer-Tropsch reactions. The steps of the process begin with the activation, or reactivation, of a deactivated cataly...
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WO/2001/025177A1 |
The invention concerns a method for recovering a co-catalyst of an aqueous phase by treatment with a base and a step which consists in separating the co-catalyst whereby the co-catalyst is isolated from the aqueous phase treated with the...
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WO/2001/019500A1 |
A diesel (compression ignition) engine having combustion management means and an exhaust gas aftertreatment system without an NO¿x? trap, which system comprising a platinum group metal (PGM) catalyst liable to be poisoned by fuel sulphu...
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WO/2001/017678A1 |
A process for the desulfurization, and reactivation of a sulfur deactivated catalyst constituted of cobalt composited with a titania support. The sulfur deactivated cobalt titania catalyst is first contacted with a gaseous stream of mole...
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WO/2001/017931A2 |
The invention relates to the use of hydrogen fluoride adducts and ammonium fluorides for fluorinating acid chlorides and halogen carbon compounds, such as chlorine alkanes or chlorethers. The used adducts can be regenerated and then re-u...
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WO/2001/014058A1 |
The regeneration of platinum group metal suspension catalysts involves a dissolution step using HCl and an oxidant, such as Cl¿2? or H¿2?O¿2?, and a precipitating step carried out in the presence of a reducing agent, especially an ald...
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WO/2001/014697A1 |
The invention relates to a method and a device for the post-treatment of exhaust gases from an internal combustion engine (1), especially in a motor vehicle. The invention is characterized in that the following devices are provided: a hy...
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WO/2001/012318A1 |
An improved separation process for the continuous catalytic oxidation of aromatic alkyls for the production of aromatic carboxylic acids in a liquid solvent medium, wherein the reactor product stream is withdrawn from the oxidation proce...
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WO/2001/012617A1 |
Process for the preparation of alkylene oxide, which process comprises passing a feed comprising an organic hydroperoxide and alkene through a bank of at least two serially connected reactors all containing a bed of heterogeneous epoxida...
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WO/2001/007382A2 |
This invention relates to a process for separating one or more cyclic products from a reaction product fluid comprising one or more cyclic reactants, a metal-organophosphorus ligand complex catalyst, optionally free organophosphorus liga...
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WO/2001/002092A1 |
The present invention pertains to a process for regenerating and rejuvenating a used additive-based catalyst comprising the steps of regenerating the catalyst by contacting it with an oxygen-containing gas at a maximum temperature of 500...
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WO/2001/002091A1 |
The present invention pertains to a process for regenerating a used additive-based catalyst comprising the step of regenerating the catalyst by contacting it with an oxygen-containing gas at a maximum temperature of 500 °C. Preferably, ...
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WO/2001/000524A1 |
The present invention relates to methods for the regeneration of catalytic reactors. In particular it relates to methods for regenerating a fuel-processing catalyst whilst it is still being used to supply hydrogen to a fuel cell. The tem...
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WO/2001/000319A1 |
Catalyst activation of a platinum reforming catalyst system contained in a multiple reactor system by simultaneously reducing the catalyst with hydrogen while introducing a nonmetallic chlorine-containing compound into a reactor of the m...
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WO/2001/000318A1 |
Catalyst activation of a platinum reforming catalyst system contained in a multiple reactor system by simultaneously reducing the catalyst with a sustained hydrogen flow through the multiple reactor system while introducing a nonmetallic...
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WO/2000/076661A1 |
The invention concerns a method for the selective separation of iron from other metal ions in particular ions present in certain oxidation catalysts. The invention also concerns a method for recycling oxidation catalysts in the oxidation...
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WO/2000/074849A1 |
The invention relates to a honeycomb body (1) consisting of layered or wound sheet layers (2, 3) which are structured in such a way, at least in partial areas, that they form channels (4) through which waste gas can pass. According to th...
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WO/2000/072967A1 |
This invention relates to a pretreatment procedure that reduces the required time to obtain the optimum activity of a Pt/Sn-based catalyst. The pretreatment activation consists of repeated cycles of 1) reduction by H¿2? at elevated temp...
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WO/2000/071248A1 |
A process for effectively utilizing a catalyst which has been used for a reaction and comprises at least molybdenum, an element A (A is at least one element selected from the group consisting of phosphorus and arsenic), and an element X ...
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WO/2000/071642A1 |
This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecula...
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WO/2000/061493A1 |
The present invention is concerned a process for the regeneration of the spent silica gel used in chromatography and for any other kind of silica. The process comprises 5 main steps, namely: washing with an extractant of organic compound...
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WO2000009520A9 |
In the process of the present invention, N-acetyliminodiacetic acid is formed via a continuous amidocarboxymethylation reaction. In this reaction, N-(acetyl)iminodiacetic acid is formed in an amidocarboxymethylation reactor system, into ...
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WO/2000/049106A1 |
A method for converting oxygenates to light olefins. The method comprises the steps of (a) contacting, in a reactor, a feedstock containing one or several oxygenates, with a molecular sieve catalyst under conditions effective to form a p...
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WO/2000/043124A1 |
The invention relates to a method for processing at least partly deactivated polymerization catalysts for the polymerization or copolymerization of THF which are contaminated with the polymerization or copolymerization products of THF. T...
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WO/2000/041986A1 |
Methanol is converted in light molecular olefins C¿2?-C¿4? with 93-100% degree of transformation and more than 90% selectivity in which more than 80% are ethylene and propylene upon a microspherical catalyst based on SAPO-34 zeolite, w...
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WO/2000/037416A1 |
A method for efficient reclamation of metal catalyst species from aqueous extract streams of diaryl carbonate synthesis, comprising treating a metal-containing aqueous extract stream of a mixture from the production of diaryl carbonates ...
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WO/2000/035575A1 |
A gas-solid fluidized bed is formed within a contacting element (10) having pairs of planar portions (14) arranged in intersecting planes, each planar portion (14) being formed by one or more webs (16) and one or more open slots (18) adj...
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WO/2000/032549A1 |
Acid fluorides, for example carboxylic acid fluorides and sulfuryl fluoride are produced by reacting the corresponding acid chlorides with hydrogen fluoride adducts of ammonium fluoride or amine hydrofluorides (which act as a catalyst or...
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WO/2000/031011A1 |
Production of unsaturated aldehydes by the aldol condensation of straight chain aldehydes, e.g. butyraldehyde, by contacting the aldehyde in the vapour phase with a particulate catalyst comprising at least one basic alkali metal compound...
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WO/2000/031031A1 |
The invention concerns a method for treating lactams. Said method enables in particular to modify the chemical nature of impurities contained in a medium containing lactams either for transforming them into non-troublesome compounds or e...
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WO/2000/029508A1 |
The invention concerns a method for catalytic cracking on an entrained bed of a hydrocarbon feed in two reaction zones, one (1) with catalyst descending flow, the other (2) with ascending flow. The method consists in introducing a load (...
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WO/2000/021945A1 |
The invention relates to a method for oxidizing an organic compound or a mixture of two or more organic compounds having a C-C double bond, comprising the following step (II): reacting the organic compound or the mixture of two or more o...
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WO/2000/018505A1 |
A regenerated hydrogenation catalyst having a specific value of the metal tolerance calculated from the void volume of the catalyst, void diameter thereof, amount of vanadium deposited thereon, external surface area thereof per unit volu...
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WO/2000/018508A1 |
A method of regenerating a hydrogenation catalyst characterized by burning a spent hydrogenation catalyst and then subjecting it to a treatment for adherent-metal removal, such as washing with water. Thus, a hydrogenation catalyst for hy...
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WO/2000/017099A1 |
The invention concerns a method whereby the gas to be treated is oxidised in sulphur by being contacted with an oxidation catalyst containing at least an oxysulphide of a metal selected among Fe, Cu, Ni, Co, Cr, Mo and W, associated with...
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WO/2000/015332A1 |
A method for restoring lost activity and selectivity of fresh cesium-promoted catalysts which comprises heating the catalyst at an elevated temperature in the presence of a sweep gas immediately prior to using the catalyst. The catalysts...
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WO/2000/014180A1 |
A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocar...
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WO/2000/012211A1 |
The invention relates to a method for regenerating used DeNOx or DeDioxin catalytic converters by washing said catalytic converters with a solution of surface-active substances in a liquid, with simultaneous addition of metal compounds c...
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WO/2000/012471A1 |
The invention relates to a method for producing formaldehyde by non-oxidative dehydrogenation of methanol in a reactor while using a fluid catalyst. After the reactor, the product gases are brought into contact with a melt in a cooler. S...
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WO/2000/009242A1 |
The invention relates to a method of separating materials of two different phases from each other and an assembly for implementing the method. According to one embodiment of the invention, the second phase having material in suspended or...
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