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WO/2000/043124 |
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/2000/041986 |
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/2000/037416 |
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/2000/035575 |
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/2000/032549 |
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/2000/031011 |
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/2000/031031 |
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/2000/029508 |
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/2000/021945 |
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/2000/018505 |
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/2000/018508 |
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/2000/017099 |
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/2000/015332 |
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/2000/014180 |
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/2000/012211 |
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/2000/012471 |
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/2000/009520 |
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/2000/009242 |
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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WO/2000/004994 |
The invention concerns a method for reactivating a catalyst for cyclizing hydrolysis of an aminonitrile for making lactams. More particularly, it concerns the reactivation of solid catalysts used in processes for producing lactams by cyc...
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WO/2000/003804 |
The invention relates to a method for regenerating a catalyst such as a plate or honeycomb catalyst that is at least partially deactivated as a result of toxic substances. The catalyst is treated with a gaseous reducing agent and a polyf...
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WO/2000/001484 |
A fluidized catalytic cracking (FCC) system including a fluidized catalytic cracking reactor (3) containing a catalyst, a regenerator (1), and an outboard vessel (2) connected to said regenerator (1) containing a vanadium trapping material.
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WO/2000/001656 |
This invention relates to methods of controlling the oxidation of cyclohexane to adipic acid in the presence of a monobasic acid solvent, by extracting the catalyst from the reaction mixture, outside the reaction zone. Substantially all ...
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WO/2000/001655 |
This invention relates to methods of controlling the oxidation of cyclohexane to adipic acid in the presence of a monobasic acid solvent, by separating the catalyst from the reaction mixture, outside the reaction zone. Substantially all ...
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WO/2000/001483 |
The invention relates to a method for regenerating catalysts which catalyze the reduction of nitrogen oxides in the molecular nitrogen, which are essentially comprised of titanium oxide TiO¿2?, tungsten oxide WO¿3? and of the active co...
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WO/1999/067509 |
The invention concerns a method for treating by combustion carbon-containing particles collected on a filter placed in an internal combustion engine exhaust circuit characterised in that said particle combustion is carried out by contact...
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WO/1999/067023 |
The invention is directed to a process for the regeneration of a catalyst, said catalyst comprising at least one precious metal on an amorphous silica-alumina support, in which process the catalyst is impregnated with an acid, followed b...
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WO/1999/061186 |
A process for recovering a solution of Co and Mn acetates and other valuable components of a waste residue of used catalyst discharged from a plant for the liquid-phase, homogeneously catalyzed oxidation of alkylaromatic compounds, to pr...
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WO/1999/058238 |
The present invention discloses aqueous methods for enhancing the acid sites of fluid catalytic cracking (FCC) catalysts. The methods comprise the steps of contacting an FCC catalyst, either spent or fresh, with an aqueous solution compr...
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WO/1999/058241 |
A method for regenerating a metal oxide fluidized bed catalyst containing molybdenum, bismuth and iron, which has been deteriorated by the use in reaction in the production of acrylonitrile through ammoxidation of propylene, which method...
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WO/1999/054041 |
A method for regeneration of sulfonic acid polystyrene resin catalyst used in the production of ether that results in recovery of over 98 % of the catalyst's potentially remaining activity comprising removing substantially all residual e...
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WO/1999/052629 |
The method of the present invention involves the in situ formation of metal-molibdate catalyst particles active for methanol oxidation to formaldehyde, with iron as an example, the catalyst is made by mixing particulate forms of Fe¿2?OÂ...
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WO/1999/052630 |
The method of the present invention involves in situ regeneration of metal-molybdate catalyst for methanol oxidation to formaldehyde comprising the step of regenerating spent metal-molybdate catalyst with an oxygen-free gas stream compri...
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WO/1999/051336 |
The present invention discloses aqueous methods for enhancing the acid sites of fluid catalytic cracking (FCC) catalysts. The methods comprise the steps of contacting an FCC catalyst, either spent or fresh, with an aqueous solution compr...
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WO/1999/049972 |
Process for activating an at least partly deactivated heterogeneous titanium-containing catalyst for the epoxidation of propene into propylene oxide, which process comprises adding a titanium compound to the liquid feed of an epoxidation...
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WO/1999/039827 |
The invention relates to a method for regenerating supported catalysts covered with gold particles, based on titanium dioxide or titanium dioxide hydrate and used for oxidising unsaturated hydrocarbons in a gas phase. The invention is ch...
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WO/1999/040299 |
Hydrocarbon in a carrier of nitrogen or steam is passed over a devitalized supported noble metal/alkali or alkaline earth catalyst/absorber, such as Pt on an alumina monolith coated with potassium carbonate, which has sorbed NOx from eng...
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WO/1999/033561 |
The invention concerns a method for regenerating a hydrogenation catalyst, and hydrogenation methods carried out with a catalyst comprising at least one regenerated catalyst. More particularly, it concerns a method for regenerating Raney...
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WO/1999/033748 |
The invention concerns a method wherein the H¿2?S of a gas to be treated is sulphur oxidised by being contacted with an oxidation catalyst consisting of at least one oxysulphide of a metal selected among Ni, Fe, Co, Cu, Cr, Mo and W, as...
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WO/1999/027239 |
A method and engine control strategy is described that enables improved catalyst performance after having been exposed to severe operating environments. More specifically, rhodium-containing catalysts are reactivated by being subjected t...
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WO/1999/016543 |
An endothermic reaction is effected using a heat transfer bed, containing a variable oxidation state material, which is cycled through a succession of stages including an oxidative regeneration stage employing passage of a hot oxidising ...
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WO/1999/011739 |
The invention concerns a device for separating and stripping a mixture of gas and particles, comprising a shell (51) including separation (2) and circulation (3) chambers distributed around a reactor (1), each separation chamber (2) comp...
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WO/1999/007469 |
Process to separate a group 8-10 metal/phosphite ligand complex from an organic liquid mixture, wherein the following steps are performed: (1) contacting the organic liquid with a support having bonded thereto an organophosphine ligand a...
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WO/1999/006386 |
An aqueous epoxidation process stream containing molybdenum and sodium values is incinerated and an aqueous solution containing molybdenum and sodium is recovered, acidified and reacted with a calcium compound without first adding base t...
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WO/1999/006503 |
A fluid cat cracking process for catalytically cracking a feed containing vanadium into lower boiling products, includes a cat cracker and a regenerator (14), with the feed entering the catalytic cracking zone preheated by indirect heat ...
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WO/1999/004902 |
A process for the generation of a hydration catalyst for cyclic olefins, i.e., a solid acid catalyst used in the hydration of a cyclic olefin by mixing an aqueous phase containing a solid acid catalyst with an oil phase containing a cycl...
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WO/1999/002258 |
A selective catalytic reduction body for the removal of nitrogen oxides (No¿x?), comprising about 5 to 80 % by weight of vanadium, about 0 to 60 % by weight of molybdenum, about 0 to 20 % by weight of nickel and about 0 to 20 % by weigh...
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WO/1999/001445 |
Propylene is converted to propylene oxide in a highly efficient liquid phase process wherein temperature and pressure are both increased over the course of the epoxidation, which is preferably conducted in a continuous mode of operation....
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WO/1999/002016 |
An apparatus and method for the processing of a material (52) in a sealed rotating drum (10) by exposing the material (52) to a source of microwave energy (30), while the material is moving through the drum (10). The material (52) is mov...
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WO/1999/001219 |
The present invention relates to methods for selectively converting oxygenates to light olefins, desirably ethylene and propylene, in which desirable carbonaceous deposits are maintained on a total reaction volume of catalyst by regenera...
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WO/1999/000191 |
Continuous process for the production of prevalently heavy hydrocarbons starting from synthesis gas in the presence of a gas phase, a liquid and a solid catalyst, the above process being carried out using a bubble column, characterized i...
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