Patents in Class 502/26

Matches 1 - 50 out of 182

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Match	Document	Document Title
1	8048818	In-situ regeneration of a catalyst masked by calcium sulfate An in-situ method for regenerating a deactivated catalyst removes a calcium sulfate layer masking active catalyst sites. A reducing agent converts the calcium sulfate to calcium oxide, which is...
2	8012899	Recycling of ionic liquid catalyst Provided is a process for safely transporting or recycling an ionic liquid catalyst based on chloroaluminates. The process comprises mixing a secondary alcohol with an ionic liquid based on a...
3	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...
4	7935229	Extraction of nickel (0) complexes from nitrile mixtures with reduced rag formation A process for extractively removing homogeneously dissolved catalysts from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles with a hydrocarbon H, including...
5	7790646	Conversion of fine catalyst into coke-like material A process for converting fine catalyst slurried in heavy oil into a coke-like material from which catalytic metals can be recovered comprises mixing fine catalyst slurried in heavy oil with...
6	7754636	Removal of excess metal halides from regenerated ionic liquid catalysts A process for removing metal halides from regenerated ionic liquid catalyst comprising interacting a regenerated ammonium-based metal-halide ionic liquid catalyst or an ammonium-based metal-halide...
7	7667074	Method for regenerating catalyst for the production of methacrylic acid and process for preparing methacrylic acid A catalyst for the production of methacrylic acid comprising a heteropolyacid compound containing phosphorus and molybdenum is regenerated by a method comprising the steps of drying a mixture...
8	7592282	Enhancement of alkylation catalysts for improved supercritical fluid regeneration A method of modifying an alkylation catalyst to reduce the formation of condensed hydrocarbon species thereon. The method comprises providing an alkylation catalyst comprising a plurality of active...
9	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...
10	7182926	Process for separating and recovering valuable metals A process for economically separating and recovering valuable metal components, with few kinds of chemicals being used, with no waste water that causes environmental pollution being discharged, and...
11	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...
12	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...
13	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...
14	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...
15	6777369	Process for producing catalyst The present invention relates to the effective utilization of a used catalyst containing at least molybdenum, an A element (at least one element selected from the group consisting of phosphorus and...
16	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.
17	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...
18	6403514	Process for the regeneration of zeolitic catalysts containing titanium A process is described for regenerating exhausted zeolitic catalysts containing titanium and deriving from oxidation processes of organic substrates with hydrogen peroxide. Said process consists in...
19	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...
20	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...
21	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...
22	6114272	Catalyst of rhodium and a non-aqueous ligand liquid for preparation of aldehydes A catalyst for preparing aldehydes by hydroformylation of olefins or olefinically unsaturated compounds comprising at least one rhodium compound and a non-aqueous ionic ligand liquid of the formula...
23	6100210	Method for regenerating a catalyst with a sulphurus active phase and contaminated by a mercury compound 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...
24	6066750	High efficiency epoxidation process Propylene is converted to propylene oxide in a highly efficient liquid phase process wherein temperature and pressure are both increased over the course of the epoxidation, which is preferably...
25	5958990	Trimerization catalysts for making polyisocyanurate foams A method for making a rigid polyurethane/polyisocyanurate foam by reacting a polyisocyanate and a polyol in the presence of a trimerization catalyst and a urethane catalyst, a blowing agent and a...
26	5877108	Performance of used molybdenum based catalysts by the addition of ammonium dimolybdate A process for regenerating molybdenum containing ammoxidation catalyst comprising replacing the molybdenum loss from the catalyst during the ammoxidation reaction wherein ammonium dimolybdenum is...
27	5618769	Process for the recovery of alkylation catalyst Process for the recovery of spent fluorinated sulfonic catalyst from acid soluble oil (ASO) being formed during alkylation of hydrocarbons in the presence of the acid catalyst. The process...
28	5512525	Regeneration of spent multimetal oxide oxidation catalysts from the catalytic gas-phase oxidation of lower organic compounds A process for regenerating spent multimetal oxide oxidation catalysts from the catalytic gas-phase oxidation of lower organic compounds and which, in fresh form, contain as basic constituents the...
29	5457240	Use of stripper reactor reflux as an initiator for preforming reaction of cobaltous salts to cobalt carbonyls A method for starting a preformer reactor disposed within a hydroformylation system which comprises an oxo reactor, a stripper reactor and a preformer reactor, wherein the bottoms from the stripper...
30	5444032	Process for preparing an effective catalyst for n-parafins hydroisomerization An improved process for preparing a difunctional catalyst active, in the hydroisomerization of long-chain normal paraffins is disclosed, which is constituted by an amorphous silica-alumina gel and...
31	5389592	Method of enhancing the activity of regenerated catalysts A method of enhancing the activity of a regenerated catalyst for the hydroprocessing of hydrocarbons comprising: (a) applying a modifying element dissolved in a solvent onto the surface of a...
32	5324695	Regeneration of metal oxide catalysts A process for regenerating deactivated metal oxide catalysts comprising at least one of the elements antimony, iron, bismuth, molybdenum, vanadium, tungsten and/or uranium and a peptizable carrier,...
33	5308810	Method for treating contaminated catalyst A method of treating spent selective catalytic reduction (SCR) catalyst is provided, which method comprises contacting the spent catalyst with a solution comprising a SCR catalyst metal salt,...
34	5306859	Alkylation catalyst regeneration utilizing polyvinylpyridine and amine substituted styrene divinylbenzene copolymer contact materials Described is a novel process for regenerating an ASO contaminated alkylation catalyst containing a sulfone component and a hydrogen halide component. A sulfone-containing mixture containing ASO and...
35	5260238	Process for regenerating a deactivated catalyst There is disclosed a process for regenerating a deactivated catalyst containing a zeolite and a noble metal of group VIII of the Periodic Table supported thereon which comprises subjecting the...
36	5250483	Method for treatment of catalysts using denitrifying bacteria A method of releasing metals from catalysts in a form that is readily recoverable using denitrifying bacteria is disclosed. The method can be used to regenerate catalysts and to recover metals from...
37	5217935	Processes for regenerating catalysts contaminated with carbonaceous materials Processes for the regeneration of catalysts, such as hydrogenation catalysts, and the defouling of objects, which are contaminated with carbonaceous deposits. The catalyst or object is contacted...
38	5212127	Process for reactivating a deactivated dehydrocyclodimerization catalyst This invention relates to a process for reactivating a dehydrocyclodimerization catalyst. Dehydrocyclodimerization catalysts which contain an aluminum phosphate binder can be deactivated when they...
39	5209840	Separation of active catalyst particles from spent catalyst particles by air elutriation Spent hydrotreating catalyst having carbonaceous and metallic deposits and of regular geometric shape after being stripped of process oil is fluidized by flowing air upwardly through the catalyst...
40	5206194	Process for reactivating a deactivated crystalline molecular sieve group VIII metal catalyst A reactivated catalyst having optimum activity for hydrocracking and other acid catalyzed chemical conversion processes is prepared by contacting its deactivated counterpart, which contains a...
41	5108976	High-density and mean-porosity catalyst supported on a siliceous matrix, based on vanadium, iron, oxygen and alkali metal A high-density and mean-porosity catalyst, supported on a siliceous matrix, based on vanadium, iron, oxygen and alkali metals, wherein the V2 O5 content ranges from 6 to 9% by weight, the Me2 O...
42	5101052	Molybdenum recovery An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by...
43	5093509	Removal of trace quantities of molybdenum An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by...
44	5093292	Chromium oxide catalyst impregnation regeneration method The catalytic activity of a chromium oxide-based catalyst used in the production of chlorine by oxidation of hydrogen chloride gas with an oxygen-containing gas is regenerated by impregnating it...
45	5091350	Process for hydroformylation with rhodium catalysts and the separation of rhodium therefrom A process for separating rhodium from mixtures thereof, comprising extracting said rhodium with an aqueous solution of a rhodium complexing agent and a solubilizer. A process for preparing...
46	5087596	Process for regenerating spent heavy hydrocarbon hydroprocessing catalyst The present invention relates to a spent hydroprocessing catalyst regeneration process wherein the catalyst is subjected to an initial partial decoking step, followed by impregnation with a Group...
47	5066469	Leaching cobalt from metal-containing particles A process is disclosed to extract cobalt and optionally, at least one metal value selected from the group consisting of molybdenum, nickel, tungsten, and vanadium from metal-containing particles,...
48	5037786	Metals passivation-zeolite containing cracking catalysts A zeolite containing catalytic cracking catalyst is passivated by treatment with an aqueous solution which has been prepared by mixing an antimony oxide, ammonium bifluroide and water. The...
49	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...
50	5011809	Preparation of a silver catalyst Supported silver catalysts which contain one or more alkali metals are prepared in a two-stage process by doping a basic catalyst which contains silver in metallic form and may also contain lithium...

Matches 1 - 50 out of 182

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