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WO/1996/029148A1 |
A process for regenerating used catalyst particles contaminated with carbonaceous and/or sulfur-containing materials, which process comprises the steps of: a) contacting said particles in a fluidized bed with an oxygen-containing gas at ...
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WO/1996/028249A1 |
A process for preparing phosphorus-doped silver catalysts from silver contaminated with phosphorus compounds is characterised by the following steps: (a) silver contaminated with phosphorus compounds is heated up to temperatures at which...
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WO/1996/020044A1 |
Hydrogen or carbon monoxide in a carrier of nitrogen or steam is passed over a devitalized catalyst/carbonate or bicarbonate absorber which has absorbed or adsorbed nitrates and nitrites from engine exhaust to restore the carbonate form ...
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WO/1996/019287A1 |
The invention concerns the preparation of aluminosilicate-carried rhenium oxide catalysts optionally with boric oxide, tungsten oxide, molybdenum oxide or vanadium oxide additives for the metathesis of olefins and functionalized olefins,...
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WO/1996/016012A2 |
A process is disclosed for preparing aldehydes and/or alcohols by hydroformylating olefins with more than 3 carbon atoms with a "naked" rhodium catalyst homogeneously dissolved in the reaction medium at an increased pressure and temperat...
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WO/1996/014146A2 |
An improved process for selective vapor phase oxidation of n-butane to maleic anhydride involving the use of a recirculating solids reactor having a reaction zone and a catalyst regeneration zone wherein n-butane is converted to maleic a...
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WO/1996/014288A1 |
Copper and vanadium catalyst components are recovered and dialkyl esters of dicarboxylic acids are synthesized from an adipic acid synthesis waste stream by precipitating the catalyst metals with an alcohol selected from the group consis...
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WO/1996/010551A1 |
A process for preparing 1,3-alkanediols and 3-hydroxyaldehydes by hydroformylating an oxirane with carbon monoxide and hydrogen in the presence of one or more Group VIII metal-based hydroformylation catalysts, and in the presence of an o...
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WO/1996/006676A1 |
An apparatus and process for the activation or reactivation of wet or dry carbon in a tubular reactor that consists of two or more sequential sections (9, 20, 26), each section containing a descending column of carbon, with the inlets (1...
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WO/1996/003365A1 |
Method of recycling a cobalt-containing catalyst in a reaction involving the direct oxidation of cyclohexane into adipic acid using an oxygen-containing gas. The method is characterized in that the reaction mixture, obtained in a precedi...
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WO/1995/032801A1 |
This invention relates to a process for improving the effectiveness of a refinery process catalyst. The process comprises treating the refinery process catalyst with an effective amount of reducing agent selected from the group consistin...
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WO/1995/031280A1 |
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 phase of alumina of a crystallite size at...
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WO/1995/027019A1 |
A process and apparatus for catalytically converting hydrocarbons to light olefins with a short contact circulating fluidized bed reactor system. The process comprises the steps of feeding a hydrocarbon feedstock into a reaction zone (1)...
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WO/1995/026813A1 |
The present invention provides a continuous process for removing contaminants, comprising oil, coke and iron sulfide deposits, from a spent hydrotreating or hydropocessing catalyst obtained from reactors and recovering the decontaminated...
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WO/1995/025591A1 |
The invention relates to a process for producing a catalytic converter consisting of a honeycomb structure with flow channels having catalytically active surfaces, in which a used catalytic converter is cleaned of foreign materials and i...
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WO/1995/024965A1 |
Disclosed is a process for controlling combustion in a fluid catalytic cracking regenerator (110). More specifically, afterburning which occurs during the combustion process is controlled by adjusting oxygen concentration in at least one...
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WO/1995/023643A1 |
The invention relates to a process for regenerating a supported precious metal catalyst and to a process for catalytically treating waste water which in particular contains halogen organic contaminants. The process for regenerating the c...
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WO/1995/020434A1 |
The present invention relates to a method of removing a coating, such as a spent catalyst coating, from a carrier such as a metal plate or a honeycomb carrier. The metal plates have a surface which has the catalyst coating. The honeycomb...
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WO/1995/018870A1 |
A method and an apparatus for recovering platinum group metals from a metal catalyst are disclosed, in order to separate the substrate containing the metal catalyst from the carrier, the sheets of the catalyst package are unwound. The sh...
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WO/1995/016635A1 |
A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium oxide such as Ta(OH)5, Ta205, Nb(OH)5, or Nb205. The process broadly relates to dissolving the...
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WO/1995/016636A1 |
A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium salt such as K2TaF7 or K2NbF7. The process broadly relates to dissolving the spent catalyst in...
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WO/1995/016009A1 |
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 catalyst to a gaseous stream including ...
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WO/1995/013874A1 |
Disclosed are catalysts based on: a) a magnetizable core which, b) can as needed be coated with a binder, and c) carries on its surface catalytically active metals or metallic compounds.
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WO/1995/010636A1 |
Palladium catalyst is recovered from an organic solution by extraction with water/base solution. The water/base solution is then neutralized, and the palladium extracted with an organic solvent. The tramp metals remain in the water phase.
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WO/1995/006757A1 |
A process is disclosed for treating used aluminum chlorofluoride catalyst either alone or mixed with organics. It involves forming a solution of the catalyst in water or an aqueous acid and then adjusting the pH of the aquous phase forme...
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WO/1995/003887A1 |
A process is disclosed for recovering components of a catalyst (4, 6, 8), in particular a spent DeNox catalyst. The catalyst (4,6, 8) is ground and the ground catalyst is then shaped into bodies (18) having a defined grain. Alternatively...
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WO/1995/001947A1 |
A method and associated apparatus for regenerating and/or stabilizing catalyst used in dehydrogenation of alkylaromatic hydrocarbons is disclosed. The alkylaromatic hydrocarbon (1) and steam (2) are combined to form feedstream (3) and pa...
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WO/1994/027934A1 |
In a process for modifying the shape selectivity of an aluminosilicate zeolite catalyst having a silica to alumina molar ratio less than 500, the catalyst is exposed to at least two ex situ selectivation sequences, wherein each ex situ s...
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WO/1994/026845A1 |
Method for controlling the heat level during the continuous processing in a fluidized bed of a pulverulent solid, whereby said solid is processed in a fluidized bed processing zone, at least a portion of the solid is drawn off from the z...
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WO/1994/023837A1 |
A cyclic process comprising the steps of: a) making an organic product by phase-transfer catalysis by reaction of an organic substrate with a nucleophile, the nucleophile being derived by metathesis of a quaternary ammonium salt or pyrid...
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WO/1994/022575A1 |
A simple and excellent method of regenerating a heteropolyacid-based catalyst which comprises dissolving and/or dispersing a heteropolyacid-based catalyst such as a phosphoromolybdic acid-based catalyst with a deteriorated catalyst activ...
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WO/1994/020213A1 |
A process for continuously regenerating a catalyst or an adsorbent which comprises the steps of: (a) establishing an ebullating or expanded bed (13) by passing a gaseous stream (17) upwardly through a plurality of particles confined in a...
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WO/1994/019104A1 |
A catalyst for use in hydroformylation of olefins which comprises a Group VIII noble metal complexed with a phosphine ligand having at least one alkyl or aryl group bonded thereto, such as tris-4-propylphenyl phosphines and tris-4-octylp...
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WO/1994/016812A1 |
A method of recovering catalyst material from latent catalyst material solids includes: a) combining latent catalyst material solids with a liquid acid anolyte solution and a redox material which is soluble in the acid anolyte solution t...
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WO/1994/014535A1 |
Catalyst in a slurry phase reactor is rejuvenated and uniformly distributed in said reactor using a substantially vertical draft tube fully immersed in the slurry which utilizes a rejuvenating gas injected substantially near the bottom o...
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WO/1994/014537A1 |
Catalyst which has become deactivated during a hydrocarbon synthesis (HCS) process is reactivated-rejuvenated using an external reactivation-rejuvenation vessel (10) resulting in a multiple HCS reaction-catalyst rejuvenation reactor vess...
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WO/1994/014534A1 |
Catalyst in a slurry phase reactor is rejuvenated in said reactor using a substantially vertical draft tube fully immersed in the slurry which utilizes a rejuvenating gas injected substantially near the bottom of the substantially vertic...
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WO/1994/013653A1 |
The invention concerns a method of preparing 3,4-epoxy-1-butene by the gas-phase epoxidation of 1,3-butadiene by oxygen or oxygen -containing gases over silver-containing catalysts, and the isol ation of the 3,4-epoxy-1-butene from the r...
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WO/1994/011104A1 |
Proposed is a method of producing catalysts containing iron, potassium and cerium from spent catalysts of this type used in the dehydrogenation of hydrocarbons (i.e. a regeneration method). The method calls for the spent catalyst to be g...
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WO/1994/008939A1 |
A method for hydroxycarbonylating pentenoic acids, wherein one or more pentenoic acids are hydroxycarbonylated into adipic acid with carbon monoxide and water in the presence of an iridium and/or rhodium based catalyst and at least one i...
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WO/1994/008922A1 |
The invention relates to a process for the conversion of an olefin or a mixture of olefins in a distillation column in which both a metathesis and an isomerization reaction occur. The invention is characterized in that in the top section...
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WO/1994/006558A1 |
A process for the removal of fluoride from a spent chromium-based fluorination catalyst by contacting the catalyst with potassium hydroxide to produce a suspension of solid hydrated chromium oxide in aqeuous potassium fluoride. The solid...
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WO/1994/005419A1 |
A process for regenerating severely deactivated reforming catalysts comprising at least one Group VIII metal on zeolite comprises (a) coke burn at severe conditions to improve the accessibility of the metal particles by transporting them...
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WO/1994/005418A1 |
A process for regenerating a deactivated catalyst or redispersing catalytic metals in a fresh catalyst comprising at least one Group VIII catalytic metal and zeolite comprises coke burn, oxyhalogenation, lower pressure, reduced temperatu...
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WO/1994/004270A1 |
A process for beneficiating a particulate zeolite petroleum cracking catalyst having metal values in excess of 1000 ppm nickel equivalents. The particulate catalyst is passed through a magnetic field in the range of from about 2 Tesla to...
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WO/1994/003273A1 |
A process for the regeneration of a solid catalyst involving the interaction between a gas and a surface of the solid catalyst in which the gas is provided in the form of AC excited catalyst. The process may be used to chemically convert...
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WO/1994/002246A1 |
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/1994/000232A1 |
An improved method for regenerating acetylene hydrogenation catalysts, particularly palladium based catalysts which have been used to remove acetylenic contaminants from ethylene, which method does not require an oxygenation or other pre...
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WO/1994/000236A1 |
A process for high efficiency regeneration of spent FCC catalyst in an existing, single dense bed FCC regenerator is disclosed. Spent catalyst is added to a coke combustor (301) immersed within the existing regenerator vessel (1) catalys...
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WO/1993/025508A1 |
A process for the production of a hydro(halo)fluorocarbon which comprises contacting an alpha-fluoroether in the vapour phase at an elevated temperature with a catalyst and wherein the catalyst is treated whereby to maintain and/or resto...
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