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WO/1998/023372A2 |
A spent zeolite-containing hydrocarbon cracking catalyst is treated by regererating it to remove carbonaceous deposits. A portion of the regenerated catalyst is withdrawn from the circulating catalyst inventory of a hydrocarbon processin...
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WO/1998/023560A1 |
The invention pertains to a process for alkylating hydrocarbons in which an alkylatable organic compound is reacted with an alkylation agent to form an alkylate in the presence of a catalyst comprising a hydrogenating function and a soli...
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WO/1998/022420A1 |
In the process for the production of acetic acid by carbonylation of methanol and/or a reactive derivative thereof the water concentration in the liquid reaction composition is maintained at a steady-state concentration by at least one p...
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WO/1998/022216A1 |
Cobalt and/or manganese is recovered from the ash obtained following incineration of the catalyst containing residue arising from the liquid phase oxidation of an aromatic carboxylic acid such as terephthalic acid. Recovery is effected b...
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WO/1998/020054A1 |
The present invention relates to a process for producing polyethylene of very high molecular weight and a method for activating the catalyst support. The parameters related to the gaseous phase fluidized bed process were determined: the ...
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WO/1998/018555A1 |
The invention concerns a method for regenerating titanium silicalite catalysts used in particular in the oxidising reactions of saturated hydrocarbons or epoxidation of olefins by treatment with a liquid solution containing an oxidising ...
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WO/1998/018556A1 |
The invention concerns a method for regenerating titanium silicalite catalysts, normally used in the oxidising reactions of saturated hydrocarbons or epoxidation of olefins, by thermal treatment under a flow of gas.
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WO/1998/018616A1 |
An outdoor protective fabric (10) is disclosed having (i) a UV stable outer nonwoven web (127) of multicomponent sheath/core fibers having a polyethylene polymer sheath component and a polypropylene polymer core component; (ii) a breatha...
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WO/1998/017619A2 |
Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid whic...
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WO/1998/008605A1 |
Heavy metal catalyst-containing residue obtained from plant for the production of aromatic polycarboxylic acid is processed by dissolving substantially the whole of the residue in an aqueous medium and the catalyst metals are precipitate...
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WO/1998/008604A1 |
Disclosed is a process for converting an iodine-free organotin (IV) compound resulting from the decomposition of an organotin (IV) iodide during the catalytic isomerization of $g(g), $g(d)-epoxyalkenes to 2,5-dihydrofurans to the corresp...
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WO/1998/006494A1 |
The invention concerns a method for treating a supported catalyst having a sulphurous compound active base and contaminated by a mercury compound. This method consists in heating the contaminated catalyst at a temperature between 300 and...
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WO/1998/005421A1 |
A process for passivating contaminating metal on a hydrocarbon cracking catalyst is provided. The catalyst is contacted within a hydrocarbon catalytic cracking unit with a stabilized dispersion. The dispersion comprises a fluid vehicle, ...
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WO/1998/004515A1 |
The invention concerns the production of compounds containing NH�2?-groups by hydrogenating compounds containing at least one unsaturated carbon-nitrogen bond with hydrogen in the presence of a catalyst at temperatures not below room t...
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WO/1998/002248A1 |
The invention concerns a method of cleaning and/or regenerating wholly or partially de-activated catalysts for stack-gas nitrogen scrubbing, in which the catalysts are treated with a washing and/or regenerating liquid, characterized by t...
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WO/1997/046306A1 |
The invention discloses a method for filtering a three-phased reaction mixture,comprising a liquid phase, an undissolved solid catalytic phase and a gas phase. More precisely it consists tangentially in filtering on one membrane filter a...
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WO/1997/044131A1 |
The invention features a method for treating a supported catalyst with a sulphur compound based active phase and a mercury compound contaminated mineral support. This method consists in implementing the following steps: the said catalyst...
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WO/1997/037963A1 |
The invention concerns a method of producing compounds containing NH2 groups by the hydrogenation of compounds which include at least one carbon-nitrogen bond with hydrogen in the presence of a catalyst, at a temperature not below room t...
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WO/1997/036673A1 |
A method for separating a catalyst from a solution containing same by membrane electrodialysis is disclosed. Specifically, the separation of a catalyst used in a homogeneous-phase molecular oxidation reaction is disclosed. According to t...
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WO/1997/033691A1 |
The present invention relates to a process for preparing a hydroprocessing catalyst comprising the steps of subjecting a spent hydroprocessing catalyst comprising carbonaceous and sulphurous deposits to a thermal treatment to remove at l...
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WO/1997/032840A1 |
The invention concerns a process for preparing amines having more than four carbon atoms by simultaneous hydroformylation and hydrogenating amination of corresponding olefins containing one carbon atom less in the presence of at least eq...
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WO/1997/026313A1 |
Process for the catalytic conversion of a hydrocarbonaceous feed comprising contacting the hydrocarbonaceous feed in a moving-bed reactor with particulate catalyst, to obtain reactor effluent and spent catalyst, separating spent catalyst...
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WO/1997/024412A1 |
A cyclone leg sealing system is composed of one or more intermediate solids-accumulation chambers (21) delimited by two sealing valves (10 and 12) in series, the function of the valves being to prevent the back-flow of particulate materi...
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WO/1997/024182A1 |
A process for increasing the activity of a zeolite-containing particulate solid containing contaminants which block the pores of the zeolite and adversely affect the activity thereof wherein the contaminated zeolitic material is slurried...
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WO/1997/023289A1 |
A method of performing an oxidation reaction in liquid phase which comprises contacting a reactant in the liquid phase with a gaseous source of oxygen in the presence of a metallic oxidation reaction catalyst embedded in a polymeric matr...
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WO/1997/020796A1 |
This invention relates to a process for separating one or more phosphorus acidic compounds from a reaction product fluid containing said one or more phosphorus acidic compounds, a metal-organophosphite ligand complex catalyst and optiona...
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WO/1997/020794A1 |
This invention relates to a process for separating one or more phosphorus acidic compounds from a reaction product fluid containing said one or more phosphorus acidic compounds, a metal-organophosphite ligand complex catalyst and optiona...
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WO/1997/020795A1 |
This invention relates to processes which comprise reacting one or more reactants in the presence of a metal-organopolyphosphite ligand complex catalyst and optionally free organopolyphosphite ligand, and an amount of a sterically hinder...
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WO/1997/020793A1 |
This invention relates to a process for producing one or more products in a staged reactor having more than one reactive stage which process comprises reacting in said staged reactor one or more reactants with carbon monoxide in the pres...
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WO/1997/020798A1 |
This invention relates to a method of stabilizing a metal-organopolyphosphite ligand complex catalyst against deactivation in a process which comprises reacting one or more reactants in the presence of a metal-organopolyphosphite ligand ...
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WO/1997/020792A1 |
This invention relates to a process which comprises reacting one or more reactants in the presence of a metal-organophosphite ligand complex catalyst and dissolved water and optionally free organophosphite ligand to produce a reaction pr...
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WO/1997/020801A1 |
This invention relates to a process which comprises reacting one or more reactants in the presence of a metal-organopolyphosphite ligand complex catalyst and optionally free organopolyphosphite ligand to produce a reaction product fluid ...
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WO/1997/020797A1 |
This invention relates to a process for separating one or more phosphorus acidic compounds from a reaction product fluid containing said one or more phosphorus acidic compounds, a metal-organophosphite ligand complex catalyst and optiona...
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WO/1997/017137A1 |
The present invention relates to a process for the activation or rejuvenation of a catalyst in the presence of a hydrocarbon liquid, which catalyst comprises a Group Ib, VIIb or VIII metal compound, by contacting the catalyst with a hydr...
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WO/1997/016249A1 |
A method for reactivating a ruthenium catalyst, comprising the steps of bringing a ruthenium catalyst whose activity has been reduced due to the use in the hydrogenation of unsaturated organic compounds into contact with oxygen in a liqu...
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WO/1997/015392A1 |
Described is a method of separating a catalyst from a mixture of the catalyst with oligomers of vinyl oxirane such as is produced in the isomerization of vinyl oxirane to 2,5-dihydrofuran and from which practically all the low-boiling co...
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WO/1997/015544A1 |
A process for treating low water content carbonylation catalyst solutions which contain a rhodium component and an alkali metal component to remove metallic corrosion products is disclosed. The process comprises contacting the catalyst s...
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WO/1997/012673A1 |
The invention relates to a hydrogenation catalyst by the reduction from platinum in the stage of oxidation of +4 (Pt (IV)) with a selective reducing agent in an acidic aqueous medium in the presence of a carbon-containing carrier to plat...
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WO/1997/010315A2 |
The invention relates to fireproof cladding in the transfer line of a gasifier (1, 2) to the heat recovery boiler (3, 4) with lugs/brackets (8, 9) to support fireproof bricks. The lug (8) is suspended from hooks (7) in the support (3) an...
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WO/1997/008269A1 |
Oxides of nitrogen (NOX) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and controlled turbulent/laminar flow processing of the flue gas. Partial CO burn FCC catalyst regeneration produ...
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WO/1997/006282A1 |
A processing method for the recovery of noble metals such as platinum, rhodium and palladium contained in various compositions comprising a layer of oxide(s) on a metal carrier, particularly used or spent post combustion catalysts for mo...
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WO/1997/005949A1 |
A method for separating a palladium catalyst from the medium in which it dissolved is disclosed. Specifically, the method is useful for separating a palladium catalyst from a medium resulting from a butadiene hydroxycarbonylation reactio...
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WO/1996/041848A1 |
The invention pertains to a process for activating a hydrotreating catalyst comprising a Group VIII hydrogenation metal oxide and a Group VI hydrogenation metal oxide on a carrier in which the hydrotreating catalyst is contacted with an ...
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WO/1996/037298A1 |
A high temperature treatment process is disclosed for increasing conversion and reducing the fouling rate of reforming catalysts. The process comprises reducing the catalyst in a reducing gas atmosphere at a temperature below 1025 �F a...
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WO/1996/037299A1 |
Provied is a process for regenerating a high temperature treated reforming catalyst which has been deactivated due to coke deposition and which catalyst comprises at least one Group VIII metal. The process comprises first burning coke fr...
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WO/1996/034687A1 |
This invention relates to membrane separation of organic solubilized rhodium-organophosphite complex catalyst and free organophosphite ligand from a homogeneous non-aqueous hydroformylation reaction mixture, said mixture also containing,...
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WO/1996/033804A1 |
A process is provided for the regeneration of a vanadium-phosphorus oxide catalyst which has been used in a process for the preparation of maleic anhydride by oxidizing butane. The used catalyst particles are removed from the fluidized b...
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WO/1996/033012A1 |
It is intended to improve an activity of a catalyst used in a process for the preparation of maleic anhydride by oxidizing n-butane in a fluidized bed reactor, wherein the catalyst comprises vanadium-phosphorus compound oxides. The catal...
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WO/1996/032193A1 |
A process is provided for regenerating a vanadium-phosphorus oxide catalyst which is used in a process for the preparation of maleic anhydride by oxidizing butane. The reaction is terminated and the catalyst is brought into contact with ...
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WO/1996/031276A1 |
A method of regenerating the catalyst in a Fischer-Tropsch synthesis reaction. Synthesis gas is supplied to the catalyst in conditions which favour high CO conversions. This results in a high H2 partial pressure which in turn results in ...
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