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WO/1993/024437A1 |
A cobalt value recovery method, especially for use in recovering cobalt catalyst from an aqueous medium obtained in purifying the product of an oxo reaction, in which recovery is effected in a closed cycle using an outboard unit, the aqu...
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WO/1993/024224A1 |
A process for the treatment of a hydrogenation catalyst, in particular a carbon supported metal catalyst which comprises contacting the catalyst with an atmosphere comprising an oxygen-containing oxidising agent, in particular oxygen or ...
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WO/1993/023164A1 |
The present invention relates to a method of separating a particulate solid catalyst from a chemical reaction mixture which further comprises at least one other solid component, either during the reaction or after the reaction.
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WO/1993/019812A1 |
A process for decontaminating oils and synthetic liquids containing polychlorobiphenyls comprises passing the liquid through a catalytic bed at an elevated temperature.
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WO/1993/010898A1 |
A process for the reactivation of a chromium-based fluorination catalyst, in particular chromia, by contacting the deactivated chromium-based fluorination catalyst with an atmosphere containing water vapour at elevated temperature, prefe...
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WO/1993/010065A1 |
This invention is a process for the regeneration of solid acidic hydrocarbon conversion catalysts, but particularly certain transition aluminas and zeolites promoted with Lewis acids (preferably BF3) which have been used in the alkylatio...
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WO/1993/008912A1 |
In a process for controlled, multi-stage regeneration of FCC catalyst, a modified high efficiency catalyst regenerator (80), with a fast fluidized bed coke combustor (62), dilute phase transport riser (83), and second fluidized bed (82) ...
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WO/1993/006917A1 |
Processes for washing zeolites, preferably less than about 0.5 micron in size, with a microfiltration system employing a washing liquid, such as an aqueous solution or water (preferably deionized water), to produce zeolite crystals havin...
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WO/1993/004029A1 |
A method for separating a water soluble Group VIII noble metal catalyst from the crude reaction product of a noble metal-catalyzed hydroformylation reaction run in aqueous solution, in an aqueous emulsion or as an aqueous suspension, the...
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WO/1993/003004A1 |
Amines such as methyl amine are reacted with materials such as reducing sugars in aqueous/hydroxy solvents such as water and/or methanol to prepare N-alkyl polyhydroxy amines. Accordingly, glucose is reacted with methyl amine and the res...
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WO/1993/002794A1 |
A process is disclosed for simultaneously heating and cooling spent FCC catalyst during regeneration in a high efficiency FCC regenerator using a fast fluidized bed coke combustor (50). The coke combustor (50) burns coke from the spent c...
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WO/1993/000993A1 |
A cobalt catalyst for use in the Fischer Tropsch reaction of synthesis gas to form hydrocarbons is activated or regenerated by treatment of a cobalt containing catalyst with a gas containing carbon monoxide, said gas containing less than...
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WO/1993/000164A1 |
This invention is a process for the regeneration of a catalyst system component comprising certain transition aluminas promoted with a Lewis acid (preferably BF3) which have been used in the alkylation of isoparaffin with olefins. The pr...
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WO/1992/022674A1 |
A method for the recovery of platinum and rhodium lost from a platinum-containing catalyst during ammonia oxidation processes at a temperature above 850 �C. Lost precious metal is brought into contact with a foraminate element fabricat...
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WO/1992/019376A1 |
A demetallization process for catalysts used for chemical conversion of hydrocarbons, the catalysts containing at least vanadium as a metal poison, wherein the poisoned catalyst is contacted in a sulfiding zone with a sulfiding agent and...
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WO/1992/019779A1 |
Disclosed is an oxidative process for recovering rhodium catalyst values from ''tars'' formed during the preparation of acetic anhydride by the rhodium catalyzed carbonylation of a mixture of methyl iodide and methyl acetate and/or dimet...
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WO/1992/018232A2 |
A catalyst composition containing one or more binary oxides of palladium and rare earth metal such as Ce, La, Nd, Pr and/or Sm. The catalyst composition is used for the catalytic combustion of gaseous combustion mixtures of oxygen and ca...
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WO/1992/018243A1 |
A novel praseodymium-palladium oxide compound has the formula Pr4PdO7. The compound has utility as a catalyst for oxidation of combustion mixtures comprising oxygen (e.g., air) and gaseous carbonaceous fuels such as methane and displays ...
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WO/1992/015654A1 |
A process for regenerating a coke contaminated reforming catalyst comprising platinum on a molecular sieve, said process consisting essentially of contacting said catalyst with a halogen-free oxygen-containing gas at a temperature of les...
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WO/1992/012782A1 |
The present invention relates to a process for separating, from each other, one non-dissolved catalyst from one or more other non-dissolved components present in a reaction mixture. The separation is obtained by using a catalyst having a...
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WO/1992/013046A1 |
A catalyst prepared from an ultra-stable Y-type zeolite having a silica/alumina ratio from about 27 to about 33 with the free acid sites passivated using a basic nitrogen-containing compound showing improved selectivity for jet fuel; a p...
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WO/1992/011087A1 |
This invention concerns the use of M[BR3H]y reagents for activating or regenerating deactivated or degraded Ni catalyst used in Ni-catalyzed alkene hydrocyanation processes in the presence of an organic phosphorus compound, where M is an...
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WO/1992/009367A1 |
Disclosed is a process for regeneration of a zeolite catalyst comprising conducting the following steps within the regeneration zone wherein the zeolite is located: (1) applying vacuum or delivering a source of molecular oxygen or inert ...
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WO/1992/004977A1 |
This invention is to: a) a catalyst system, b) a component of that system comprising certain transition aluminas promoted with a Lewis acid (preferably BF¿3?), and c) a catalytic process for the alkylation of isoparaffin with olefins. T...
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WO/1992/001512A1 |
A process and apparatus (Figs. 1, 2, 3 and 4) for controlled, multi-stage regeneration of FCC catalyst is disclosed. A modified high-efficiency catalyst regenerator (80), with a fast fluidized bed coke combustor (62), dilute phase transp...
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WO/1992/001632A1 |
A process for controlled, multistage regeneration of FCC catalyst is disclosed. A modified high efficiency catalyst regenerator (80), with a fast fluidized bed coke combustor (62) dilute phase transport riser (83), and second fluidized b...
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WO/1992/001511A1 |
A process and apparatus for controlled, multi-stage, regeneration of FCC catalyst is disclosed. A modified high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized...
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WO/1991/019888A1 |
A method and device for rapid in situ rejuvenation of an automobile catalytic converter catalyst by oxidation are disclosed. The method comprises the injection of the oxidizing agent (6) into the automobile air stream at a point upstream...
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WO/1991/017824A1 |
A process is disclosed for the treatment of a new or deactivated supported metal catalyst containing noble metal to prepare said catalyst for use in the hydrodehalogenation of a compound having the formula: CnHmFpXq, where each X is inde...
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WO/1991/016294A1 |
Process for the recovery of catalyst in the production of ether carboxylic acids by catalytic oxidation with a suspended ether catalyst in which the reaction mixture is subjected to cross-flow filtration.
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WO/1991/015295A1 |
A process for treating catalytic particles in a vertical chamber is disclosed. The catalytic particles comprise spent catalysts from such hydroprocesses as hydrocracking and hydroreforming. The process comprises suspending the catalytic ...
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WO/1991/013682A1 |
The present invention is directed to an apparatus for treating a catalyst including facilities for removing at least one member selected from the group consisting of elemental mixtures of elemental halogen, halogen containing compounds a...
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WO/1991/012298A1 |
By continuously or intermittently adding amounts of magnetically active moieties, e.g. iron compounds, over time so that the moiety deposits on a catalyst or sorbent in a fluid catalytic cracker or similar circualting hydrocarbon convers...
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WO/1991/009671A2 |
A catalyst useful for promoting the conversion of organonitrogen and organosulfur compounds in a hydrocarbon-containing feedstock is regenerated in a method wherein a deactivated catalyst is contacted with a controlled amount of water pr...
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WO/1991/008050A1 |
Disclosed is a process for recovering rhodium catalyst values from ''tars'' formed during the preparation of acetic anhydride by the rhodium catalyzed carbonylation of a mixture of methyl iodide and methyl acetate and/or dimethyl ether. ...
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WO/1991/007372A1 |
Disclosed is an improved process for the recovery of rhodium catalyst values from "tars" formed during the preparation of acetic anhydride by the rhodium-catalyzed carbonylation of a mixture of methyl iodide and methyl acetate. The proce...
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WO/1991/007227A1 |
A process for regeneration of a deactivated hydroprocessing catalyst is provided. The process comprises exposing the catalyst to laser radiation in the presence of an oxidizing gas. The process may be used to regenerate supported or unsu...
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WO/1991/004097A1 |
This invention provides a process for the regeneration and/or activation of a noble catalyst comprising contacting said catalyst with an atmosphere comprising a fluorohalocarbon and/or a fluorohydrocarbon of the formula: CnHmFpXq, wherei...
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WO/1991/001804A1 |
A process for regenerating a catalyst which involves washing a catalyst with a liquid at a temperature within the range of about 50 �C to about 70 �C for a time sufficient to remove foulants thereby recovering catalyst activity. The ...
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WO/1991/001358A1 |
A continuous regenerator for the two-stage regeneration of hot coked fluid catalytic cracking catalyst, and a method for regenerating coked catalyst by combustion with air and with reduced emissions of nitrogen oxides, or with reduced em...
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WO/1990/015039A1 |
Supported metal oxide catalysts such as lead oxide catalysts are rejuvenated after absorbing arsenic compounds from hydrocarbon streams (such as propylene) by heating them in an inert, oxygen-free atmosphere, optionally with moisture pre...
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WO/1990/014312A2 |
A process is provided for the purification of water which is contaminated with environmentally undesirable components, such as halogenated hydrocarbons, wherein the contaminated water or the gaseous and/or liquid components present there...
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WO/1990/005114A1 |
A process for the neutralization, clarification and decolorization of organosilanes or organosilicones derived from the reaction of an organosilane or a hydropolysiloxane with an aliphatically unsaturated compound in the presence of an a...
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WO/1990/003841A1 |
A process for treating an organic solution of a partially deactivated solubilized rhodium - tertiary organophosphine complex hydroformylation catalyst with an organic reagent in order to improve the extractability of rhodium therefrom in...
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WO/1989/010342A1 |
An improved process for the alkylation of benzene in the presence of an alkylation catalyst (14, 16). The catalyst bed may be caused to move in a direction countercurrent to the movement of the benzene and olefin, or a portion of the cat...
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WO/1988/006917A1 |
Activity stabilization and/or reactivation of molybdo-heteropolyacid catalysts during oxidization in gaseous phases, such as the oxyhydrogenation of isobutyric acid or its lower esters to methacrylic acid or its lower esters, by means of...
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WO/1988/004574A1 |
Process for regenerating a large-pore zeolitic catalyst that has been deactivated by the formation of Group VIII metal agglomerates on the catalyst surface. In the process, the Group VIII metal agglomerates are redispersed to produce agg...
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WO/1988/004575A1 |
Process for regenerating a sulfur-contaminated, highly selective, large-pore zeolite catalyst. It comprises a multistep process involving exposure of the catalyst to a combination of oxidizing conditions, reducing conditions and treatmen...
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WO/1987/007601A1 |
A process for the preparation of dihydrocarbyl carbonates comprising contacting an alkanol, carbon monoxide and oxygen with a heterogeneous catalyst which comprises a metal halide or mixed metal halide impregnated on an appropriate suppo...
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WO/1987/005232A1 |
A mixture of same diameter, cylindrical catalyst particles are length graded into a first group having a a length L1 and a value of L/D greater than one, and a second group having a length greater than L1, by: feeding the mixture into a ...
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