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| Number | Title | Issue Date |
| 7479468 | Integrating an air separation unit into an oxygenate-to-olefins reaction system This invention provides an integrated system and process for forming light olefins and polymers from oxygenates, and optionally from natural gas. The integrated system includes an air separation unit, which separates air components into an oxygen stream and a nitrog... | 01/20/2009 |
| 7419929 | Critical phase alkylation process A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst comprising cerium-promoted zeolite beta. An aromatic feedstock having a benzene content of at least 90 wt. % is suppli... | 09/02/2008 |
| 7312173 | Regeneration method with efficient oxygen utilization This invention relates to regeneration of coked catalyst by combustion so that the catalyst can be reused in a hydrocarbon conversion reaction. The completion of coke burn is generally measured with a combination of temperature or change in oxygen concentration. Dro... | 12/25/2007 |
| 7304011 | Compositions and processes for reducing NOemissions during fluid catalytic cracking Compositions for reduction of NOx generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeoli... | 12/04/2007 |
| 7291311 | Process for controlling a moving bed combustion zone and its use Process for controlling the combustion zone of a fluidized bed process comprising a regeneration zone and a reaction zone, the catalyst circulating between these two zones, and the regeneration zone comprising a combustion stage of the coke deposited on the catalyst... | 11/06/2007 |
| 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 |
| 7157167 | Thermocatalytic process for CO-free production of hydrogen and carbon from hydrocarbons A novel process and apparatus are disclosed for sustainable CO2-free production of hydrogen and carbon by thermocatalytic decomposition (dissociation, pyrolysis, cracking) of hydrocarbon fuels over carbon-based catalysts in the absence of air and/or water... | 01/02/2007 |
| 7087546 | Process for regenerating and rejuvenating additive-based catalysts The present invention pertains to a process for regenerating and rejuvenating an additive-based hydrotreating catalyst containing Group VIB and Group VIII hydrogenation metals. The process comprises the steps of regenerating the catalyst by contacting it with an oxy... | 08/08/2006 |
| 7060236 | Process for removing volatile organic compounds A continuous and regenerative process for removal and destruction of VOC from effluents is disclosed. The process employs two fixed bed reactors in series filled with adsorbent/catalyst. The VOC containing effluent is passed over the first reactor for adsorbing VOC,... | 06/13/2006 |
| 7037871 | Low-temperature regeneration of zeolite L using ozone A process is disclosed for regenerating a hydrocarbon conversion catalyst comprising zeolite L with ozone. The catalyst is contacted with ozone at a temperature of from about 20 to about 250° C. and a concentration of ozone of from about 0.1 to about 5 mol-%. The c... | 05/02/2006 |
| 7018948 | Activation and regeneration of a hydro-oxidation catalyst A process of activating a fresh catalyst or regenerating a deactivated catalyst which is used in a hydro-oxidation process, preferably, the hydro-oxidation of an olefin in the presence of oxygen and hydrogen to an olefin oxide. The hydro-oxidation catalyst preferabl... | 03/28/2006 |
| 6987078 | Alkylation and catalyst regenerative process A process for the regeneration of a deactivated zeolite beta catalyst such as rare earth promoted zeolite beta catalyst deactivated in the course of an aromatic alkylation reaction. A zeolite beta conversion catalyst deactivated with the deposition of coke is heated... | 01/17/2006 |
| 6958304 | Method for regenerating a zeolite catalyst A process for the regeneration of a zeolite catalyst which comprises treating the catalyst thermally in the presence of a gas stream at temperatures above 120° C., the weight-based residence time of the gas stream over the catalyst during the thermal treatment bein... | 10/25/2005 |
| 6916756 | Regeneration of a dehydrogenation catalyst A process for regenerating a dehydrogenation catalyst comprises the steps (a)-(f): (a) flushing with inert gas at a pressure of from 0.5 to 2.0 bar and a gas hourly velocity of from 1000 to 50 000 h−1; (b) passing an oxygen-con... | 07/12/2005 |
| 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 beds of adsorbent to return the halogen-containing materials to a circul... | 09/14/2004 |
| 6784132 | Cyclic catalyst regeneration process using adsorption and desorption 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 beds of adsorbent to maintain the halogen-containing materials within a ... | 08/31/2004 |
| 6710002 | Method for regenerating a zeolitic catalyst A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at fro... | 03/23/2004 |
| 6635795 | Desulfurization with improved sorbent regeneration While contacting under regeneration conditions an oxygen-containing stream with a sorbent comprising a promoter metal and zinc sulfide which has been sulfurized by contact with sulfur-containing hydrocarbons such as cracked-gasolines and diesel fuel, the ... | 10/21/2003 |
| 6544410 | Desulfurization with improved sorbent regeneration During the regeneration of a sulfurized sorbent comprising zinc aluminate, a promoter metal and zinc sulfide by contact with an oxygen-containing stream to convert at least a portion of said zinc sulfide to zinc oxide the average sulfur dioxide partial pr... | 04/08/2003 |
| 6506702 | Process and vessel for regeneration of a catalyst including monitoring and monitoring and control of combustion completion The invention concerns a process for regenerating a catalyst in a fixed bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out after the cat... | 01/14/2003 |
| 6472340 | 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 chlorine-containing compound into a reactor of the multiple reactor sy... | 10/29/2002 |
| 6380119 | Method for regenerating a zeolitic catalyst A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 2... | 04/30/2002 |
| 6239055 | Process and vessel for regeneration of a catalyst including monitoring and monitoring and control of combustion completion The invention concerns a process for regenerating a catalyst in a fixed or moving bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out aft... | 05/29/2001 |
| 6187709 | Palladium catalyst pre-oxidation to reduce light-off temperature The invention is a method for preconditioning a palladium containing automotive catalyst by subjecting the catalyst to oxidation by means of an oxidizing gas containing at least 0.85% oxygen at a temperature of at least 450° C. preferably for at least 15... | 02/13/2001 |
| 6133183 | Process for regenerating a catalyst for the production of aromatic compounds or for reforming, with improved oxychlorination The invention concerns a process for regenerating a catalyst for the production of aromatic compounds, in particular for reforming, comprising combustion (A), oxychlorination (B) and calcining (C) steps, in which at least one chlorinating agent (conduit 1... | 10/17/2000 |
| 6114265 | Combustion control in a fluid catalytic cracking regenerator Disclosed is a process for controlling combustion in a fluid catalytic cracking regenerator. More specifically, afterburning which occurs during the combustion process is controlled by adjusting oxygen concentration in at least one of two combustion strea... | 09/05/2000 |
| 6103652 | Staged combustion process and apparatus for regenerating a reforming or aromatic compound production catalyst in a moving bed The invention concerns a process for moving bed regeneration of a reforming or aromatic hydrocarbon production catalyst. The catalyst includes a support, at least one noble metal and at least one halogen. The process includes a combustion step in which th... | 08/15/2000 |
| 6083862 | Cyclic process for oxidation of calcium sulfide Calcium sulfide particles in mixtures with carbon particles, as in coal gasifier waste, are converted to calcium oxide by repeated cycles of oxidation and reduction by utilizing the carbon as a source of the reducing gas required for the treatment. The tr... | 07/04/2000 |
| 5972208 | FCC metals passivation additives applied to catalyst A process and apparatus for incorporating additives into a circulating inventory of equilibrium catalyst in a fluid catalyst cracking (FCC) unit are disclosed. Hot regenerated catalyst is removed from the FCC regenerator, cooled, optionally subjected to m... | 10/26/1999 |
| 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 catalyst bed in which regeneration is occurring is passed to a... | 10/12/1999 |
| 5908804 | Reduction of emissions from FCC regenerators Coke is burned in the regenerator vessel of an FCC complex with a combustion medium consisting of a diluent gas, such as air, enriched with oxygen, The regenerator is operated in partial combustion mode and excess oxygen is introduced into the combustion ... | 06/01/1999 |
| 5565089 | Process for decoking catalysts Coke deposits are removed from particulates by combustion in a regenerator by a process in which air is initially used as the oxidant. The combustion gas is subjected to a separation process to remove nitrogen therefrom, and the remaining carbon dioxide-e... | 10/15/1996 |
| 5560817 | Hydrocarbon catalytic cracking process Hydrocarbon fluid catalytic cracking (FCC) plants are debottlenecked by replacing air feed to the cracking catalyst regenerator with oxygen and carbon dioxide exhaust from the catalyst regenerator and removing methane and hydrogen from the wet gas stream ... | 10/01/1996 |
| 5521134 | Method for regenerating vanadium/phosphorus oxidation catalysts A method of regenerating V/P/O oxidation catalyst used for the partial oxidation of n-butane which comprises terminating the n-butane feed and contacting the catalyst with an oxygen containing gas, such as air for a sufficient period of time to regenerate... | 05/28/1996 |
| 5446000 | Treatment for virgin phosphorous/vanadium oxidation catalysts A method of removing chloride from phosphorus/vanadium/oxygen mixed oxide oxidation catalysts comprising treating a chloride containing catalyst comprising phosphorus, vanadium and oxygen with a stream of gas comprising oxygen, steam and an inert gas at f... | 08/29/1995 |
| 5393717 | Regeneration of noble metal containing zeolite catalysts via partial removal of carbonaceous deposits There is provided a process for regenerating a coked catalyst comprising a zeolite and a noble metal such as platinum. The process involves treating the coked catalyst under somewhat mild oxidation conditions, whereby a sufficient portion of the coke is r... | 02/28/1995 |
| 5376607 | Method for controlling moisture by coke composition A semi-continuous process for combusting coke from catalyst particles in a fixed bed is improved by rejecting from the combustion process a high moisture content flue gas stream which is produced by the combustion of a relatively large proportion of the h... | 12/27/1994 |
| 5365009 | Heterogeneous alkylation and regeneration of alkylation catalysts An alkylation process which utilizes a solid alkylation catalyst is disclosed. The catalyst, which has carbonaceous material adsorbed thereto, is regenerated by reacting the adsorbed carbonaceous material. The reaction step is accomplished by heating the ... | 11/15/1994 |
| 5362694 | Sulfur dioxide regeneration of superacid catalyst A process for regeneration of spent sulfated and calcined solid superacid catalyst is disclosed. Said process comprises heating said catalyst to a temperature of approximately 450° C. and contacting said catalyst with a gas stream comprising oxygen or ai... | 11/08/1994 |
| 5348921 | Method for reducing sulfate formation during regeneration of hot-gas desulfurization sorbents The regeneration of sulfur sorbents having sulfate forming tendencies and used for desulfurizing hot product gas streams such as provided by coal gasification is provided by employing a two-stage regeneration method. Air containing a sub-stoichiometric qu... | 09/20/1994 |
