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7615510 |
Methods of activating chromium catalysts
New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature...
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7585803 |
Catalyst regeneration method
A method of operating a continuous system for a catalyst regeneration process wherein the regeneration section includes a combustion zone, at least one oxygen boost zone, a halogenation zone and a...
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7538253 |
Method for preparing catalyst for partial oxidation of methylbenzenes
The present invention relates to a novel method for preparing a catalyst of the formula (1),
WOx
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7405174 |
Process for regeneration of a catalyst that contains an EUO-structural-type zeolite
A process for regeneration of a catalyst that comprises at least one EUO-structural-type zeolite in acid form and at least one hydro-dehydrogenating metal, used in a process for isomerization of a...
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7223710 |
Cyclic catalyst regeneration process using a circulating stream for desorption
A process in which halogen is recovered from a cyclic operation for regenerating hydrocarbon conversion catalysts is disclosed. The process uses an arrangement of beds of adsorbent and a...
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7045477 |
Process for continuously regenerating catalyst particles
A process for continuously regenerating catalyst particles comprising: passing deactivated catalyst particles downwards in sequence through the first coke-burning zone, second coke-burning zone,...
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6992038 |
Zinc chloride-loaded support and method for producing the same
The present invention is to solve the problems caused by a conventional method for producing a zinc chloride-loaded support wherein zinc chloride is adsorbed on a solid support in an aqueous...
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6921731 |
Process for regenerating Pd catalysts
Process for regenerating a Pd catalyst after a homogeneously catalyzed C—C coupling reaction in which the Pd catalyst precipitates, is separated from the reaction mixture and subsequently treated...
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6881391 |
Method for removing halogen from a vent stream
A method for decreasing the environmental release of a halogen from a process for regenerating catalyst particles in a catalyst bed of a regeneration zone is disclosed.
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6872679 |
Heterogeneous catalyst regeneration
Used titanium-containing silicon oxide catalysts are regenerated by heating the used catalyst at a temperature of at least 400° C. in the presence of a oxygen-containing gas stream, followed by...
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6790802 |
Cyclic catalyst regeneration process using adsorption and desorption on vent stream
A method of recovering halogen-containing materials from the cyclic catalyst regeneration operation of a catalytic hydrocarbon conversion process is disclosed. The method uses an arrangement of...
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6780815 |
Process for preparing fluorination catalyst
A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.
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6551660 |
Method for removing reactive metal from a reactor system
A method for reducing catalyst contamination in a hydrocarbon conversion reactor system, comprising the steps of contacting at least a portion of a metal-coated hydrocarbon conversion reactor...
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6461992 |
Method for reducing chloride emissions from a moving bed catalyst regeneration process
A method is disclosed for decreasing the emissions of chlorine-containing species from a moving bed process for regenerating spent catalyst particles with a recycle gas stream. A recycle gas stream...
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6413434 |
Method for eliminating halogenated compounds contained in a gas or liquid
The present invention concerns a process for eliminating, reducing and/or suppressing halogenated compounds, in particular chlorinated compounds, contained in a gas or a liquid, in which the gas or...
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6403515 |
Process for treating a catalyst or an adsorbent in a fluidized bed
The invention concerns a process for fluidising a catalyst or an adsorbent in a furnace which is fixed but the fluidised bed advances, optionally with rotation, in the presence of another inert...
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6294492 |
Catalytic reforming catalyst activation
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...
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6290916 |
Apparatus for controlling moisture in a catalyst regeneration process
A method and apparatus are disclosed for removing water from a recycle gas stream in a catalyst regeneration process. A recycle gas stream contacts catalyst and the catalyst sorbs water from the...
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6147022 |
Process for degraded-mode regeneration of a catalyst
Process for regeneration of a catalytic moving bed in which the catalyst successively passes through at least one combustion zone A, at least one halogenation zone B, and at least one calcination...
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6123833 |
Method for controlling moisture in a catalyst regeneration process
A method and apparatus are disclosed for removing water from a recycle gas stream in a catalyst regeneration process. A recycle gas stream contacts catalyst and the catalyst sorbs water from the...
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6117809 |
Method for decreasing chloride emissions from a catalyst reduction process
A method is disclosed for recovering chlorine-containing species from an outlet stream of a zone in which the catalytic metal of a chloride-containing catalyst is reduced. The outlet stream is...
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6110857 |
Method of minimizing iron contamination during catalyst regeneration processes
The present invention is directed toward improved processes for the regeneration of noble metal-containing catalysts wherein iron contamination of the catalyst during regeneration is significantly...
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6034016 |
Method for regenerating halogenated Lewis acid catalysts
A method for removing high molecular weight solid and liquid tars and oligomers from halogenated Lewis acids catalysts is disclosed. The Lewis acids incorporating such tars and oligomers are...
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5965473 |
Cyclic catalytic hydrocarbon conversion process with reduced chloride emissions
A method is disclosed for recovering chlorine-containing species from the outlet gas of a hydrocarbon conversion process with a cyclic regeneration operation. The outlet gas from an off-stream...
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5880049 |
Regeneration of catalysts for gas phase fluorination
In order to regenerate the activity of a catalyst for gas phase fluorination the spent catalyst is treated with chlorine and hydrogen fluoride, at a temperature of between 250° and 450° C.
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5874647 |
Benzene hydroxylation catalyst stability by acid treatment
A zeolite catalyst for hydroxylating benzene to phenol is treated hydrothermally with a gas comprising approximately 1-100 mole percent water at a temperature between approximately 350°-950° C.,...
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5866495 |
Method of regenerating deactivated catalysts
A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with...
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5837636 |
Method for reducing chloride emissions from a catalyst regeneration process
A method is disclosed for decreasing the emissions of chlorine-containing species from a process for contacting catalyst particles with a recycle stream containing chlorine-containing species....
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5824619 |
Particulate cooling process with reduced thermal channeling
A regeneration process is described that eliminates or greatly reduces thermal channelling in a cooling zone bed. The method controls the flow rate of cooling gas independently of the requirements...
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5776849 |
Regeneration of severely deactivated reforming catalysts
The invention is directed a process for regenerating deactivated reforming catalysts comprising at least one Group VIII metal on zeolite L, preferably wherein the catalysts are extruded using a...
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5763348 |
Method of regenerating deactivated catalyst
A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with...
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5759937 |
Method for regeneration of a hydrogen fluoride alkylation catalyst containing sulfone, water, and ASO
Disclosed is an alkylation process which utilizes a mixture of sulfone and hydrogen fluoride as an alkylation catalyst. The process provides for the removal of ASO and water from the alkylation...
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5756414 |
Method of regenerating deactivated catalyst
The present invention is a process for regenerating deactivated catalyst or redispersing catalytic metal in a fresh catalyst comprising at least one Group VIII catalytic metal, zeolite, an inert...
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5728642 |
Exhaust gas treating agent and a method of treating exhaust gas using the agent
There is provided with a method of treating an exhaust gas comprising the steps of loading into a column an exhaust gas treating agent containing as a main component a metal of which surface is...
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5712214 |
Regeneration of aromatization catalysts
A low-pressure, high-temperature, wet post-treatment after oxyhalogenation during regeneration to improve activity and selectivity recovery of a regenerated catalyst involves exposing a halogenated...
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5650369 |
Catalysts used for producing carbonic acid esters and methods of producing carbonic acid esters using the same
The present invention relates to a novel catalyst having a stable catalytic activity for catalyzing the reaction of an alcohol with carbon monoxide and oxygen to produce carbonic acid esters (i.e.,...
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5457077 |
Moving bed regeneration process with combined drying and dispersion steps
A regeneration process for reconditioning catalyst particles containing platinum by transferring the catalyst particles through a combustion zone and a reconditioning zone is disclosed. Drying of...
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5391527 |
Regeneration of a modified alkylation catalyst with hydrogen
Catalytic composites of the reaction product of a metal halide having Friedel-Crafts activity with the bound surface hydroxyl group of inorganic oxides and containing a zerovalent metal with...
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5227566 |
Process for the dehydrogenation of hydrocarbons
A process for the dehydrogenation of a hydrocarbon selected from the group consisting of propane and butane in the presence of a catalyst comprising platinum and a carrier material. Reconditioning...
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RE34250 |
Process for regenerating sulfur contaminated reforming catalysts
The present invention is a process for regenerating a sulfur-contaminated, highly selective, large-pore zeolite catalyst. It comprises a multistep process involving exposure of the catalyst to a...
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5198199 |
Process for the recovery of antimony-based catalysts used for the fluorination of halgenated hydrocarbons
To recover the antimony contained in a solution of use antimony-containing catalyst, emananting from units for the fluorination or chlorofluorination of halogenated hydrocarbons comprising at least...
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5155073 |
Demetallization of hydrocarbon conversion catalysts
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...
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5151392 |
Moving bed regeneration process with separate dispersion and chloriding steps
A process for reforming hydrocarbons has a regeneration process for reconditioning catalyst particles containing platinum that improves the process by transferring the catalyst particles through a...
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5132259 |
Method for reactivating catalysts used in catalytic vapor phase process for producing dihydrocarbyl carbonates
A process for the preparation of dihydrocarbyl carbonates comprising contacting an alkanol such as methanol, carbon monoxide and oxygen with a heterogeneous catalyst which comprises a metal halide...
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5102632 |
Two-step method for recovering dispersed noble metals
A two-stage method of recovering the noble metal content of a mixture of noble metals, for example, platinum, palladium, and rhodium, this mixture being, for example, comprises on or throughout a...
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5057470 |
Regeneration of noble metal catalysts used in hydrodehalogenation of halogen-substituted hydrocarbons containing fluorine and at least one other halogen
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...
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5021377 |
Demetallization and passivation of spent cracking catalysts
A process for reactivating a spent, metal-contaminated zeolite-containing catalytic cracking catalyst composition comprises partially demetallizing (preferably by chlorinating and washing) the...
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5004827 |
Catalytic vapor phase process for producing dihydrocarbyl carbonates
A process for the preparation of dihydrocarbyl carbonates comprising contacting an alkanol such as methanol, carbon monoxide and oxygen with a heterogeneous catalyst which comprises a metal halide...
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4977118 |
Method for regeneration of catalyst for producing of aziridine compounds
A method for regeneration of catalyst which comprises phosphorus and alkali metal element and/or alkaline earth metal element and was deteriorated by use to produce aziridine compound represented...
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4960573 |
Recovering method of catalytic component and carrier from waste catalyst
Disclosed is a recovering method of a catalytic substance and a carrier from a waste catalyst which comprises subjecting the waste catalyst composed of a catalyst prepared by supporting a catalytic...
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