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8057572 |
Metal recovery
A method is provided for recovering rhenium from a titania-supported, rhenium-containing catalyst by treating the catalyst in the reduced form with an acid in an amount and for a time sufficient to...
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7956000 |
Process for activating a hydrotreating catalyst
The invention pertains to a process for activating an hydrotreating catalyst comprising a Group VIB metal oxide and a Group VIII metal oxide which process comprises contacting the catalyst with an...
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7956002 |
Ionic liquid catalyst regenerated using a regeneration metal in the presence of added hydrogen
An ionic liquid catalyst, which has been regenerated by contacting a used ionic liquid catalyst with at least one regeneration metal in a regeneration zone in the presence of added hydrogen under...
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7858549 |
Method for regeneration of iron-loaded denox catalysts
The invention relates to a method for regenerating denox catalysts having an increased SO2/SO3 conversion rate as a result of the cumulation of iron compounds, and is characterized in that the...
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7825055 |
Regeneration of ionic liquid catalyst using a regeneration metal in the presence of added hydrogen
A process for regenerating a used acidic ionic liquid catalyst comprising contacting the used ionic liquid catalyst with at least one ‘regeneration’ metal in a regeneration zone in the presence of ...
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7732363 |
Regeneration of acidic catalysts
A process for regenerating a used acidic catalyst which has been deactivated by conjunct polymers by removing the conjunct polymers so as to increase the activity of the catalyst is disclosed....
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7727925 |
Regeneration of ionic liquid catalyst by hydrogenation using metal and acid
A process for regenerating a used acidic ionic liquid catalyst which has been deactivated by conjunct polymers comprising combining the used catalyst, a metal and a Broensted acid which acts a...
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7723251 |
Method of regeneration of SCR catalyst
A method of regeneration of a SCR catalyst for use in a power plant facility burning fossil fuels, bio-based fuels, or a combination thereof, wherein poisons are removed from the catalyst. The...
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7691771 |
Regeneration of ionic liquid catalyst by hydrogenation using a supported catalyst
A process for regenerating a used acidic ionic liquid catalyst comprising the steps of contacting the used ionic liquid catalyst and hydrogen with a supported hydrogenation catalyst comprising a...
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7678727 |
Regeneration of ionic catalyst by hydrogenation using a homogeneous catalyst
A process for regenerating a used acidic ionic liquid catalyst comprising the steps of contacting the used ionic liquid catalyst and hydrogen with a homogeneous hydrogenation catalyst in a reaction...
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7674740 |
Regeneration of ionic liquid catalysts
A process for regenerating a used acidic ionic liquid catalyst comprising contacting the used ionic liquid catalyst with an isoparaffin-containing stream and Broensted acid in a reaction zone under...
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7666808 |
Denitrification catalyst regeneration method
A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then...
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7651970 |
Regeneration of ionic liquid catalyst by hydrogenation using a metal or metal alloy catalyst
A process for regenerating a used acidic ionic liquid catalyst which has, been deactivated comprising the steps of contacting the used chloroaluminate ionic liquid catalyst and hydrogen with a...
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7629287 |
Reclamation of a titanosilicate, and reconstitution of an active oxidation catalyst
A method of reclaiming a titanosilicate from a deactivated or spent oxidation catalyst containing a titanosilicate having deposited thereon one or more catalytic metals, such as gold, and...
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7592283 |
Method of regenerating honeycomb type SCR catalyst by air lift loop reactor
Provided is a method of regenerating a honeycomb type SCR catalyst which is used in selective catalytic reduction (SCR), comprising treating a waste honeycomb type SCR catalyst used in an...
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7569506 |
Method for regenerating iron-loaded denox catalysts
The invention relates to a method for regenerating DeNOx catalysts having an increased SO2/SO3 conversion rate as a result of the cumulation of iron compounds, and is characterized in that the...
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7559993 |
Process for decoating a washcoat catalyst substrate
The invention relates to a process for decoating a used washcoat carrier substrate to produce a clean, inert carrier or substrate. In a preferred embodiment, a process according to the invention...
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7550641 |
Methods for recovering activity of molecular sieve catalysts
The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst...
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7481938 |
Metal compound removal
The present invention relates to a process for separating at least one metal compound and/or a component thereof from a mixture, said process comprising contacting the said mixture with a...
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7399725 |
Perchlorate destruction
Perchlorate is removed and effectively destroyed in devices and methods that employ a eluting solvent in which the anion of an acid solubilizes Ti (III), which may be electrochemically generated or...
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7384882 |
Process for regenerating titanium-containing catalysts
The present invention discloses a process for regenerating titanium-containing catalysts, characterized in that a deactivated catalyst is treated in an acidic solution having a pH value of ≦3, a...
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7309675 |
Method for regenerating platinum catalysts
The regeneration of platinum group metal suspension catalysts involves a dissolution step using HCl and an oxidant, such as Cl2 or H2O2, and a precipitating step carried out in the presence of a...
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7115537 |
Process for the regeneration of zeolite catalysts
A process for the regeneration of a zeolitic catalyst which is at least partially exhausted by use in the synthesis of optionally substituted methylenedianiline (MDA) and derivatives thereof, or of...
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7084085 |
Process for regenerating a layered double hydroxide
A process for producing alumina from bauxite is described in which bauxite is treated with an alkali to form a mixture comprising a solution of aluminum-containing ions and alumina trihydrate is...
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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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6933257 |
Sol-gel derived porous microcomposite of perfluorinated ion-exchange polymer and metal oxide
Porous microcomposites have been prepared from perfluorinated ion-exchange polymer and metal oxides such as silica using the sol-gel process. Such microcomposites possess high surface area and...
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6891076 |
Process for the recovery of perfluorinated sulphonic acids from spent acid residue
Process for the recovery of perfluorinated sulphonic acid from a hydrocarbon residue, comprising the steps of (a) treating the residue with an alkyl ammonium salt of the perfluorinated sulphonic...
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6878654 |
Reactivation of aromatics alkylation catalysts
The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an...
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6872859 |
Process for the preparation of bisphenols with zeolites
The present invention relates to a process for preparing bisphenols which comprises reacting a carbonyl compound containing at least two carbon atoms with an aromatic compound, containing a...
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6861383 |
Catalyst support material and use thereof
A process for the preparation of a catalyst support material involving the steps of: (a) subjecting a used titania-on-silica catalyst to a decoking treatment, (b) washing the decoked catalyst with...
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6800585 |
Catalyst for selective catalytic reduction of nitrogen oxides and a method for preparing the same
Disclosed are a catalyst for selective catalytic reduction of nitrogen oxides and a method for preparing the same. Useful for the removal of nitrogen oxides is a catalyst prepared using spent...
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6764662 |
Recover and recycle rhodium from spent partial oxidation catalysts
A method for the recovery of rhodium from spent supported catalysts. In one embodiment, a method for recovering rhodium from a host material includes roasting the host material in air at a...
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6753285 |
Process for regenerating a used precious metal catalyst
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...
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6673732 |
Process for catalytic ammonia production—preparation and recovery of ammonia synthesis catalyst
A catalyst active in ammonia synthesis with improved activity and a process for the recovery of useful components from the catalyst.
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6673733 |
Method for regenerating heteropolyacid catalyst and method for producing methacrylic acid
The invention provides a method for regenerating with high efficiency a deteriorated catalyst of reduced activity, said catalyst originating from a heteropolyacid catalyst containing heteropolyacid...
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6559085 |
Method for regenerating molybdenum-containing oxide fluidized-bed catalyst
A method for regeneration of a molybdenum-containing oxide fluidized bed catalyst which comprises impregnating a fluidized catalyst of a metal oxide containing molybdenum, bismuth and iron which...
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6417128 |
Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst
This invention relates to methods of replacing water and cyclohexanone with acetic acid in an aqueous solution of catalyst, preferably a cobalt compound. Such an aqueous solution is produced by...
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6395665 |
Methods for the regeneration of a denitration catalyst
This invention provides a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with an aqueous alkaline solution to...
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6395664 |
Process for reactivating a deactivated dehydrocyclodimerization catalyst with water
This invention relates to a process for reactivating a dehydrocyclodimerization catalyst. Dehydrocyclodimerization catalysts which contain an aluminum phosphate binder can be deactivated when they...
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6291394 |
Process for improving catalysts
Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals which catalysts in addition contain a nanocrystalline...
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6281157 |
Self-catalytic bath and method for the deposition of a nickel-phosphorus alloy on a substrate
Disclosed are a self-catalytic bath and a method for the deposition of Ni--P alloy on a substrate. The bath comprises nickel sulfate, sodium hypophosphite as a reducing agent, acetic acid as a...
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6248683 |
Process for the regeneration of used silica gel
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:...
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6239054 |
Process for regenerating catalysts
Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals, which catalysts in addition contain a nanocrystalline...
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6191060 |
Reclamation of metal catalysts used in the production of diaryl carbonates
A method for efficient reclamation of metal catalyst species from aqueous extract streams diaryl cabonate synthesis, comprising treating a metal-containing aqueous extract stream of a mixture from...
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6124230 |
Polymerization catalyst systems, their production and use
This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky...
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6083468 |
Method of manufacturing a hydrogenation catalyst
A hydrogenation catalyst is prepared by reduction of platinum in an oxidation state of not less than two using a reducing agent in an aqueous medium in the presence of a carbon-containing support...
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6080696 |
Method for cleaning fouled ion exchange resins
Methods are disclosed for the regeneration of fouled ion exchange (IX) resins. In one embodiment, the fouled resin is treated simultaneously with reducing agent and acid. In a preferred embodiment,...
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6077803 |
Process for off-site preconditioning of a hydrocarbon processing catalyst
A process for presulfurizing a refining catalyst or petrochemical catalyst consists of bringing a catalyst into contact with liquid elementary sulfur or elementary sulfur dissolved in a liquid,...
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6071843 |
Process for reactivating catalyst systems containing a platinum group metal
Platinum metal-containing catalyst systems, which comprise at least one platinum metal, a co-catalyst and other salts, and which are used for the production of diaryl carbonates by the oxidative...
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6046125 |
Methods for enhancing the acid sites of FCC catalysts
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...
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