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| Number | Title | Issue Date |
| 7846861 | Process for regenerating a catalyst A process for regenerating a catalyst used in the preparation of acrolein from glycerol, which comprises tungsten compounds and has acidic properties and at least one promoter. ... | 12/07/2010 |
| 7390764 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catal... | 06/24/2008 |
| 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 circulating stream to return the halogen-containing materials to a regeneration... | 05/29/2007 |
| 6984603 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said cata... | 01/10/2006 |
| 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. ... | 08/24/2004 |
| 6734130 | Hydrocarbon hydrogenation catalyst composition, a process of treating such catalyst composition, and a process of using such catalyst composition A process of treating a catalyst composition containing palladium, an inorganic support, and a catalyst component, such as silver and/or a modifier such as alkali metal fluoride, is provided. The process involves contacting a catalyst composition with a first treati... | 05/11/2004 |
| 6613852 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherei... | 09/02/2003 |
| 6521199 | Regeneration of onium fluoride-HF adducts Hydrogen fluoride adducts and ammonium fluorides are used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes or chloronated ethers. The used adducts can be regenerated and then reused in the fluorination reactions.... | 02/18/2003 |
| 6451173 | Separator system An improved apparatus useful in a process for separating a liquid stream (which can be an HF catalyst mixture) having a first liquid component (which can be HF), a second liquid component (which can be light ASO) and a third liquid component (which can be... | 09/17/2002 |
| 6355594 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherei... | 03/12/2002 |
| 6121180 | Precombustion of halogen-containing compounds in catalyst regeneration processes A method for regenerating a hydrocarbon conversion catalyst wherein at least a portion of a halogen-containing compound is precombusted in a precombustion zone, and the catalyst is regenerated in the presence of the halogen. By precombusting the halogen-c... | 09/19/2000 |
| 6034289 | Treatment of chromium oxide and catalytic manufacture of vinyl fluoride Advantageous processes are disclosed for the production of vinyl fluoride. Also disclosed are advantageous methods which may be employed for the preparation of catalysts useful in such processes. Included are methods which involve (i) reducing surface B | 03/07/2000 |
| 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 treated with an oxidizing agent such as chlorine, a halogen fluo... | 03/07/2000 |
| 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.... | 03/09/1999 |
| 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 catalyst that accumulates therein while minimizing the loss o... | 06/02/1998 |
| 5739070 | Process for regenerating a fluorination catalyst Process for regenerating a fluorination catalyst The invention relates to a process for regenerating a fluorination catalyst containing chromium and magnesium after use in a fluorination reaction, in which the used catalyst is treated with a mixture compr... | 04/14/1998 |
| 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 fluorinated previously; passing through the column the exhaus... | 03/17/1998 |
| 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 catalyst to a gaseous stream including water having a par... | 01/27/1998 |
| 5407877 | Catalyst treatment process 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, preferably above 300° ... | 04/18/1995 |
| 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 deactivated catalyst to decoking treatment under reductive or ... | 11/09/1993 |
| 5227350 | Fluorination catalyst regeneration A method for regenerating a used fluorination catalyst such as a chromium-containing compound comprises contacting the used catalyst at a temperature of 300° C. to 500° C. with a mixture of an oxidizing agent, especially air, and hydrogen fluoride and o... | 07/13/1993 |
| 5227552 | Process for hydrogenating alkenes in the presence of alkanes and a heterogeneous catalyst The present invention provides a process for producing a selected paraffin from a reaction mixture containing (i) an acceptor olefin having the carbon backbone structure of said selected paraffin; (ii) a donor paraffin having a carbon backbone structure differ... | 07/13/1993 |
| 5094988 | Activation of noble metal catalysts using fluorohalocarbons or fluorohalohydrocarbons 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, Cn Hm F... | 03/10/1992 |
| 5087778 | Regeneration of zeolites used for purifying 1,1,1,2-tetrafluoroethane 1,1,1,2-Tetrafluoroethane (R134a) is purified to remove 50-10,000 wt. ppm of 2-chloro-1,1-difluoroethylene (R1122) by contacting with a zeolite or carbon molecular sieve having an average pore diameter of 3.8 to 4.8 Angstroms. The zeolite or carbon molecu... | 02/11/1992 |
| 5039638 | Conversion of spent butane isomerization catalysts to pentane isomerization catalysts A spent butane isomerization catalyst which contains platinum and chlorine on alumina is converted to an active n-pentane isomerization catalyst by processes comprising fluorination (preferably with dissolved HF or NH4 HF) and calcination (befo... | 08/13/1991 |
| 5039639 | Process for converting spent butane isomerization catalysts to pentane isomerization catalysts A spent butane isomerization catalyst comprising platinum and chlorine or alumina is converted in an active n-pentane isomerization catalyst by a process comprising calcining and subsequent heating with a fluorocarbon and/or chlorofluorocarbon. The thus p... | 08/13/1991 |
| 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 spent catalytic cracking catalyst composition, and thereafter ... | 06/04/1991 |
| 4980324 | Regeneration or activation of noble metal catalysts using fluorohalocarbons or fluorohalohydrocarbons 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, Cn Hm F... | 12/25/1990 |
| 4937215 | Process for restoring deactivated catalysts A process for restoring deactivated catalysts containing zeolite with a noble metal of Group VIII of the Periodic Table and to be used in the production of aromatic compounds, wherein decoking of the deactivated catalysts is carried out in the presence of... | 06/26/1990 |
| 4935121 | Reactivation of metal-contaminated cracking catalysts A process for reactivating a spent, metal-contaminated zeolite-containing cracking catalyst composition comprises the substantially simultaneous contacting with a fluorine compound (preferably HH4 F) and a metals passivating agent (preferably a... | 06/19/1990 |
| 4861738 | Process for regenerating and stabilizing phosphorus-vanadium-oxygen complex catalysts The present invention relates to a process for the regeneration and stabilization of certain phosphorus-vanadium-oxygen complex catalysts or phosphorus-vanadium-oxygen co-metal complex catalysts, with halogen-containing components and subsequently treatin... | 08/29/1989 |
| 4851380 | 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 combination of oxidizing conditions, reducing conditions and... | 07/25/1989 |
| 4645751 | Regeneration of noble metal-highly siliceous zeolite with sequential hydrogen halide and halogen or organic-halogen compound treatment A process is described for rejuvenation of a deactivated highly siliceous noble metal-containing zeolite catalyst which contains agglomerated noble metals. The process comprises initially reducing the deactivated catalyst in hydrogen, pretreating the thus... | 02/24/1987 |
| 4612293 | Upgrading of spent butane isomerization catalyst to pentane isomerization catalyst A fluoride-containing platinum on alumina support isomerization catalyst useful for the isomerization of pentane to isopentane can be prepared by a several step treatment of substantially deactivated chloride-containing platinum on alumina support isomeri... | 09/16/1986 |
| 4578369 | Process for the regeneration of fluorination catalysts According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary... | 03/25/1986 |
| 4480046 | Reactivation process for iridium-containing catalysts using low halogen flow rates A process is described for reactivating agglomerated iridium-containing catalysts such as Pt-Ir on Al2 O3 reforming catalyst. The agglomerated catalyst is decoked to remove carbon deposits; treated with hydrogen to reduce metal oxide... | 10/30/1984 |
| 4473656 | Process for reactivating iridium-containing catalysts A process is disclosed for reactivating an agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes a reducing step involving contacting a decoked agglomerated catalyst with a reducing... | 09/25/1984 |
| 4472515 | Low temperature decoking process for reactivating iridium containing catalysts A process is disclosed for reactivating a coked and agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes a low temperature decoking step to achieve partial decoking while minimizin... | 09/18/1984 |
| 4472514 | Process for reactivating iridium-containing catalysts in series A process is disclosed for reactivating agglomerated iridium-containing catalysts, in series, and particularly platinum-iridium on alumina reforming catalysts. The process includes a reducing step, involving contacting a decoked agglomerated catalyst with... | 09/18/1984 |
| 4469804 | Niobium or tantalum/halogen-containing catalyst regeneration process Catalysts containing niobium or tantalum halides which have been deactivated by contact with oxygen are regenerated by being contacted with a halogenated hydrocarbon.... | 09/04/1984 |
