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| Number | Title | Issue Date |
| 7915191 | Three-stage counter-current FCC regenerator This invention is directed to a method and apparatus for regenerating a catalyst used in an FCC unit, including providing a spent catalyst into an upper portion of a regenerator, maintaining a calcination phase, a gasification phase, and a combustion phase of fluidi... | 03/29/2011 |
| 7816294 | Methods and configurations for catalyst regeneration A catalyst regenerator (100) has a first section (110) and a second section (120) and is operated such that carbon from a carbon-contaminated catalyst (140) is converted to carbon monoxide in the first section (110) and that carbon monoxi... | 10/19/2010 |
| 7368090 | FCC spent catalyst distributor An distributor arrangement introduces spent FCC catalyst more uniformly across the dense bed of the regenerator to provide more even contact with regeneration gas in order to avoid hot spots and zones of incomplete combustion. The invention forms a fluidized hopper ... | 05/06/2008 |
| 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 |
| 7250140 | FCC reactor A fluid catalytic reactor vessel having at its upper end a single centrally positioned primary cyclone having a gas-solids inlet fluidly connected to the downstream end of a fluid catalytic riser, which riser is positioned externally from a fluid catalytic reactor v... | 07/31/2007 |
| 7202195 | Method of heat treating carbonaceous material to enhance its adsorption of taste-and-odor-causing and other organic compounds from water An activated carbon that is capable of adsorbing taste-and-odor-causing and other organic compounds, wherein the activated carbon comprises a uniquely modified carbonaceous material. The activated carbon comprising: (a) a pore volume per gram of the activated carbon... | 04/10/2007 |
| 7199069 | Method for destruction of organic compounds by co-oxidation with activated carbon A method for oxidizing carbon adsorbable organic compounds in a controlled manner within a bed of activated carbon. The bed of activated carbon is exposed to a source of molecular oxygen, such as air, and is controlled within a temperature range whereby the molecula... | 04/03/2007 |
| 7053260 | Reducing temperature differences within the regenerator of an oxygenate to olefin process The present invention provides a process for making an olefin product from an oxygenate feedstock which comprises: a) contacting the feedstock in a reaction zone with a catalyst comprising i) a molecular sieve having defined pore openings and ii) a CO oxidati... | 05/30/2006 |
| 7030055 | NOreduction compositions for use in FCC processes Compositions for reduction of gas phase reduced nitrogen species and NOx generated during a partial or incomplete combustion catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise (i) an acidic... | 04/18/2006 |
| 7026262 | Apparatus and process for regenerating catalyst Disclosed is an apparatus and process for prolonging the residence time of catalyst in a chamber for regenerating catalyst. Spent catalyst, perhaps from an FCC reactor, is introduced into a chamber of a regeneration vessel between lower and higher combustion gas dis... | 04/11/2006 |
| 6902665 | Reduced NOx combustion promoter for use in FCC processes Compositions comprising a component containing (i) an acidic oxide support, (ii) an alkali metal and/or alkaline earth metal or mixtures thereof, (iii) a transition metal oxide having oxygen storage capability, and (iv) palladium promote CO combustion in FCC process... | 06/07/2005 |
| 6776607 | Process for minimizing afterburn in a FCC regenerator The invention relates to a process and apparatus for controlling afterburning in the regenerator of a FCC unit. The process and apparatus inject steam into the dilute phase within a regenerator to promote combustion of carbon monoxide before it enters the regenerato... | 08/17/2004 |
| 6759361 | Aluminoboronate activators for single-site olefin polymerization catalysts Single-site catalyst systems useful for polymerizing olefins are disclosed. The catalyst systems comprise an organometallic complex and an activator. The complex includes a Group 3-10 transition metal, M, and at least one indenoindolyl ligand that is pi-bonded to M.... | 07/06/2004 |
| 6579820 | Reactor modifications for NOx reduction from a fluid catalytic cracking regeneration vessel A process for regenerating a spent catalyst having coke deposits thereon in a catalyst regeneration vessel having a dense phase and a dilute phase, wherein the process comprises the steps of: (a) contacting the spent catalyst with a primary oxygen-contain... | 06/17/2003 |
| 6358881 | Reduced NOx combustion promoter for use in FCC processes Compositions comprising a component containing (i) an acidic oxide support, (ii) an alkali metal and/or alkaline earth metal or mixtures thereof, (iii) a transition metal oxide having oxygen storage capability, and (iv) palladium promote CO combustion in ... | 03/19/2002 |
| 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 |
| 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 |
| 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 |
| 5827793 | Controlled FCC catalyst regeneration using a distributed air system Spent FCC catalyst is regenerated under net reducing conditions in a regenerator to minimize the migration of vanadium on the spent FCC catalyst particles. Reducing conditions in at least the bottom 50% of the catalyst bed are maintained by using at least... | 10/27/1998 |
| 5773378 | Spent catalyst distribution A regenerator in a FCC unit, with the reactor elevated above the regenerator and a side entry spent catalyst introduction to the regenerator, is modified by installing a spent catalyst distribution apparatus along a central vertical axis of the regenerato... | 06/30/1998 |
| 5599758 | Regeneration of catalyst/absorber 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 and regenerate the... | 02/04/1997 |
| 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 |
| 5547910 | Method and system for controlling the activity of a crystalline zeolite cracking catalyst A method and system for cracking hydrocarbons and regeneration of the catalyst is described with particular emphasis directed to partially restoring the activity of the catalyst after an initial hydrocarbon conversion use by heat soaking the catalyst at a... | 08/20/1996 |
| 5464528 | FCC process and apparatus with upset tolerant third stage separator An inertial/filtering separator in a single vessel and FCC process using same as a third stage separator are disclosed. Gas and fines are added tangentially to an annulus formed by a cylindrical insert in a vessel. Gas flows over the insert and down to fi... | 11/07/1995 |
| 5462717 | Processes using fluidized solids and apparatus for carrying out such processes Apparatus and processes are disclosed for carrying out chemical reactions of the type in which a fluidized particulate solid is contacted with reactants in a reaction vessel or conduit and then separated from the reactant products and regenerated in a reg... | 10/31/1995 |
| 5382352 | Conversion of NOx in FCC bubbling bed regenerator Oxides of nitrogen (NOx) emissions from FCC regenerators in complete CO combustion mode are reduced by degrading regenerator performance to increase the coke on regenerated catalyst. High zeolite content cracking catalyst, regenerated to contai... | 01/17/1995 |
| 5346610 | Multi-stage regeneration of catalyst in a bubbling bed catalyst regenerator A process and apparatus for regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator. Spent catalyst is regenerated in a fast fluidized bed coke combustor heated by direct contact heat exchange with c... | 09/13/1994 |
| 5308473 | Low NOx FCC regeneration process and apparatus A process and apparatus for fluidized bed regeneration of FCC catalyst are disclosed. Oxides of nitrogen (NOx) emissions from an FCC regenerator operating in complete CO combustion mode, and hydrothermal catalyst deactivation, are reduced by re... | 05/03/1994 |
| 5288397 | Baffled FCC regeneration process and apparatus A process and apparatus for dense phase, at least partially co-current, fluidized bed regeneration of FCC catalyst are disclosed. Catalyst regeneration occurs in a dense phase fluidized bed, with catalyst flowing laterally from a spent catalyst inlet to a... | 02/22/1994 |
| 5286691 | Demetallation in FCC regenerator A process for demetallizing metals contaminated FCC catalyst in an FCC regenerator. A metals getter additive, with higher settling velocity, is added to the regenerator, to remove metals from FCC catalyst by solid-solid interaction. The FCC catalyst forms... | 02/15/1994 |
| 5268089 | FCC of nitrogen containing hydrocarbons and catalyst regeneration Oxides of nitrogen (NOx) emissions from an FCC regenerator are reduced by forcing the regenerator to operate between full and partial CO burn mode. Operating with less than 1 mole % O2 and up to 1 or 2% CO in the flue gas creates conditions whi... | 12/07/1993 |
| 5202294 | Low pressure drop regeneration of a catalyst A process and apparatus for the regeneration of spent FCC catalyst in a single vessel are disclosed. In one embodiment, catalyst is at least partially regenerated in a primary stage comprising a fast or turbulent fluidized bed. The flue gas is discharged ... | 04/13/1993 |
| 5198397 | Two-stage fluid bed regeneration of catalyst with shared dilute phase A process and apparatus for multi-stage fluidized bed regeneration of spent FCC catalyst in a single vessel. At least two isolated relatively dense phase fluidized beds are disposed beneath a common dilute phase region. Spent catalyst discharged into a pr... | 03/30/1993 |
| 5171540 | Catalyst regeneration Catalytic regenerators, nozzle designs and processes suitable for introducing regeneration air into a catalytic cracking unit which substantially reduce erosion induced nozzle failures include a plurality of nozzle elements having a roughness defined upon... | 12/15/1992 |
| 5158919 | Catalyst regeneration in a single stage regenerator converted to a two stage high efficiency regenerator A process and apparatus for fluidized bed catalyst regeneration. A mixture of spent catalyst, recycled hot regenerated catalyst and regeneration gas are charged to a riser having an outlet connective with a coke combustor immersed in a fluidized bed of ca... | 10/27/1992 |
| 5143874 | Catalyst regenetation in high efficiency regenerator heated by indirect heat exchange A process and apparatus 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 immersed within the existing regenerator vessel catalyst bed. A dilut... | 09/01/1992 |
| 5130012 | Process and apparatus for reducing NOx emissions from high-efficiency FFC regenerators A fluidized catalytic cracking process using a high efficiency regenerator comprising a coke combustor, a dilute phase transport riser, and a second fluidized bed with catalyst recirculation to the coke combustor, is operated to reduce NOx emis... | 07/14/1992 |
| 5110775 | Two stage combustion process for cracking catalyst regeneration A two-stage process and apparatus for the regeneration of fluidized catalytic cracking (FCC) catalyst is disclosed. A primary regenerator, a single dense bed with a spent catalyst inlet, a source of oxygen-containing gas, a flue gas outlet and a regenerat... | 05/05/1992 |
| 5106799 | Fluidized bed combustion process A process and apparatus for fluidized bed combustion using a dense phase combustion zone over a dilute phase combustion zone. When used to regenerate FCC catalyst containing coke with relatively large amounts of NOx precursors, the catalyst is ... | 04/21/1992 |
| 5077251 | Control of multistage catalyst regeneration with both partial and full co combustion A process for controlled, multi-stage regeneration of FCC catalyst is disclosed. A modified high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized bed regenerates the catalyst in ... | 12/31/1991 |
