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| Number | Title | Issue Date |
| 7404891 | Heat recovery technique for catalyst regenerator flue gas A technique for recovering heat from a high temperature effluent stream from catalyst regeneration or the like, comprising processes and means for: (a) passing the effluent stream in heat exchange relationship in a steam generator with boiler feed water to produce h... | 07/29/2008 |
| 7273543 | Process and apparatus for controlling catalyst temperature in a catalyst stripper A process and an apparatus for catalytic cracking a hydrocarbon feed to lighter hydrocarbon employing a catalyst cooler in flow communication with a catalyst stripper is disclosed. ... | 09/25/2007 |
| 6780308 | Stripping process with disproportionately distributed openings on baffles A baffle-style stripper for an FCC process comprising sloped baffles in which a greater volumetric flow rate of stripping medium permeates openings in a bottom section of the baffle than through a top section of the baffle for low catalyst flux stripping operations.... | 08/24/2004 |
| 6723227 | Fluidized catalytic cracking process Fluidized catalytic cracking process which process comprises: (a) separating the hydrocarbon product from the spent catalyst by means of one or more gas-solid separation steps; (b) stripping the spent catalyst in a dense phase fluidized stripping zone by introducing... | 04/20/2004 |
| 6602476 | Apparatus and process for heat exchange with fluid beds Apparatus and process for heat exchange with fluid beds comprises heat-exchange tubes located longitudinally with respect to the axis of a fluidization zone with a rectangular pitch, one side of which having a length at least one and a half times the leng... | 08/05/2003 |
| 6558531 | Method for maintaining heat balance in a fluidized bed catalytic cracking unit The invention relates to a process for maintaining heat balance in a fluidized bed catalytic cracking unit. More specifically, the invention relates to a combustion control method capable of maintaining or restoring heat balance by conducting, under appro... | 05/06/2003 |
| 6059958 | Process for the fluid catalytic cracking of heavy feedstocks A process for the fluid catalytic cracking of heavy feeds under a heat balance regime is described, where one or more catalyst coolers external to the regenerator cool a stream of regenerated catalyst. A portion of said stream returns to the regenerator a... | 05/09/2000 |
| 6010618 | FCC process with two zone short contact time reaction conduit An FCC process provides ultrashort catalyst and feed contacting in an FCC riser by recovering a short contact product stream in an intermediate section of the riser. The remainder of the catalyst and gas mixture continues through the riser along a continu... | 01/04/2000 |
| 5904837 | Process for fluid catalytic cracking of oils A process for the fluid catalytic cracking of oils, wherein an oil is brought into contact with catalyst particles using a fluid catalytic cracking reactor under the following conditions: a) a reaction zone outlet temperature of 580 to 630° C., catalyst/... | 05/18/1999 |
| 5853568 | Fluid cat cracking heavy using stripped catalyst for feed preheat and regenerator temperature control A fluid cat cracking process for catalytically cracking a feed containing vanadium into lower boiling products, includes a cat cracker and a regenerator, with the feed entering the catalytic cracking zone preheated by indirect heat exchange with spent, st... | 12/29/1998 |
| 5800697 | FCC process with dual function catalyst cooling An FCC reactor and regenerator arrangement provides substantially independent control of temperature on the reactor side and regenerator side of the process. The arrangement withdraws cooled regenerated catalyst for transfer to a reactor riser and cooled ... | 09/01/1998 |
| 5660716 | Fluidized-bed catalytic cracking process for a hydrocarbon feedstock, particularly a feedstock with a high content of basic nitrogen compounds A fluidized-bed process for catalytic cracking of a hydrocarbon feedstock where the hydrocarbon feedstock, particularly a feedstock with a high content of basic nitrogen compounds, and a catalyst circulate in the tubular zone co-currently from the top to ... | 08/26/1997 |
| 5584986 | Fluidized process for improved stripping and/or cooling of particulate spent solids, and reduction of sulfur oxide emissions A fluidized process which comprises contacting a hydrocarbon feedstock with a fluidized particulate solid in a contacting zone wherein carbonaceous deposits accumulate on the solid and the solid becomes spent and wherein the carbonaceous deposits are burn... | 12/17/1996 |
| 5492617 | Apparatus and method for quenching in hydroprocessing of a hydrocarbon feed stream This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed which substantially fills the entire volume of a reactor vessel. Catalyst are selected to be essentia... | 02/20/1996 |
| 5451313 | FCC feed contacting with catalyst recycle reactor An FCC process mixes spent and regenerated catalyst to obtain thermal equilibrium of a blended catalyst stream before contacting feed with the blended catalyst stream. The spent and regenerated catalyst from the reactor and regenerator catalyst may be mix... | 09/19/1995 |
| 5389231 | Catalytic cracking process and apparatus therefor A catalytic cracking process and apparatus wherein hot regenerated catalyst particles from the dense phase of the regenerator are passed through a heat exchanger in indirect heat exchange with stripped catalyst particles whereby the former are cooled and ... | 02/14/1995 |
| 5324419 | FCC to minimize butadiene yields A process for fluidized catalytic cracking of heavy feed to make more catalytically cracked products and less thermally cracked products such as butadiene is disclosed. Operating an upflow riser reactor with a riser top temperature of 1050 to 1150 °F., a... | 06/28/1994 |
| 5324421 | Method of protecting heat exchange coils in a fluid catalytic cracking unit In a steam generator for recovering heat in a hot fluidized bed of solid particles, wherein coils of the steam generator make a 180° U-bend, the U-bend portion of the coils are protected from overheating by installing an open top insulating box around th... | 06/28/1994 |
| 5324418 | FCC process using high cat:oil ratios A process for fluidized catalytic cracking of heavy feed to minimize yields of heavy fuel oil is disclosed. Operating a reactor with a 15:1 to 30:1 cat:oil ratio, at a reactor temperature of 1000° to 1100° F., and 1.5 to 5.0 seconds of catalyst residenc... | 06/28/1994 |
| 5298151 | Ebullated bed hydroprocessing of petroleum distillates In ebullated bed hydroprocessing of a distillate hydrocarbon feedstock, it has been found that high pressure and low pressure heat exchange can be separated. Both the high pressure heat exchange and the fired heater fuel consumption are reduced. A control... | 03/29/1994 |
| 5298155 | Controlling yields and selectivity in a fluid catalytic cracker unit The invention is directed to a process for controlling product yields in a fluid catalytic cracker unit. In particular, the invention is directed to a process wherein the introduction of feed into a catalytic cracking zone is effected by feed injectors wh... | 03/29/1994 |
| 5271826 | Catalytic cracking of coke producing hydrocarbons A process for thermally and catalytically upgrading a heavy feed in a single riser reactor FCC unit is disclosed. A heavy feed is added to a blast zone in the base of the riser, and sufficient hot regenerated FCC catalyst is added to induce both thermal a... | 12/21/1993 |
| 5176814 | Method of cooling with an endothermic fuel A heat source, may be on a high speed vehicle, may be cooled by transferring thermal energy from the heat source to an endothermic fuel decomposition catalyst in order to heat the catalyst to a temperature sufficient to crack or dissociate at least a port... | 01/05/1993 |
| 5160426 | Process and apparatus for indirect heating of catalyst stripper above a bubbling bed catalyst regenerator A process and apparatus for achieving hot catalyst stripping of spent FCC catalyst in a stripper mounted over a bubbling bed regenerator. Hot catalyst stripping is achieved by indirect transfer of heat from the regenerator to the stripper. Heat pipes, sur... | 11/03/1992 |
| 5139649 | Process for multi-stage fast fluidized bed regeneration of catalyst A process and apparatus for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A coke combusto... | 08/18/1992 |
| 5087349 | Process for selectively maximizing product production in fluidized catalytic cracking of hydrocarbons An improved process for controlling desired product distribution in fluidized catalytic cracking of olefins is provided wherein riser reactor temperature profiles are controlled by means of atomized quench streams provided downstream of the hydrocarbon fe... | 02/11/1992 |
| 5071539 | FCC catalysts of increased effective heat capacity A catalytic composition for use in fluid catalytic cracking has an effective heat capacity of at least about 0.29 BTU/lb. °F. over the range from 950° F. to 1300° F. The composition may include microspheres containing in situ crystallized Y-faujasite a... | 12/10/1991 |
| 5059305 | Multistage FCC catalyst stripping Operational flexibility of a fluid catalytic cracking process is improved by directly cooling regenerated catalyst in an external catalyst cooler/stripper (ECCS). Regenerated catalyst withdrawn from the catalytic cracking unit regenerator is mixed with sp... | 10/22/1991 |
| 5047140 | Process and apparatus for multi-stage regeneration of catalyst in a bubbling bed catalyst regenerator and side mounted fast fluidized bed regenerator A process and apparatus are disclosed for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A... | 09/10/1991 |
| 5043055 | Process and apparatus for hot catalyst stripping above a bubbling bed catalyst regenerator A process and apparatus for achieving multistage, hot catalyst stripping of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. Hot catalyst stripping is... | 08/27/1991 |
| 5034115 | Process and apparatus for fast fluidized bed regeneration of catalyst in a bubbling bed catalyst regenerator A process and apparatus are disclosed for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A... | 07/23/1991 |
| 5032252 | Process and apparatus for hot catalyst stripping in a bubbling bed catalyst regenerator A process and apparatus for achieving multistage, hot catalyst stripping of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A secondary or hot cataly... | 07/16/1991 |
| 5032251 | Process and apparatus for fast fluidized bed regeneration of catalyst in a bubbling bed catalyst regenerator A process and apparatus for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A closed coke c... | 07/16/1991 |
| 5021147 | Solid addition and withdrawal A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, ther... | 06/04/1991 |
| 5011592 | Process for control of multistage catalyst regeneration with full then partial 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 ... | 04/30/1991 |
| 5000924 | Autoacceleration control for exothermic reactors An autoacceleration control for a catalytic hydrocracker wherein, by means of a model of the reactor, there is generated a signel predicting the reaction temperature and means under the control of the signal adjusting the rate of application of a correcti... | 03/19/1991 |
| 5000841 | Heavy oil catalytic cracking process and apparatus A fluidized catalytic cracking process operates with a hot stripper to improve stripping of spent catalyst from the FCC process. The catalyst from the hot stripper is cooled by direct contact heat exchange with a source or cooled regenerated catalyst. Coo... | 03/19/1991 |
| 4988431 | Process for performing catalytic reactions A process for performing catalytic reactions with intensive heat of reaction, in which a reaction mixture is conducted through a catalyst bed, from which the reaction heat is removed or to which it is fed by indirect heat exchange with a heat exchange med... | 01/29/1991 |
| 4978440 | Quenched catalytic cracking process A fluidized catalytic riser cracking process is disclosed wherein a quench stream, preferably water or steam, is injected downstream of the riser reactor outlet to decrease the residence time and temperature of a majority of the hydrocarbons in a reactor ... | 12/18/1990 |
| 4975181 | Process and apparatus for ethylene production There is disclosed an improved process and apparatus for the pyrolysis of a heavy hydrocarbon feed utilizing a transfer line reactor wherein pyrolysis reaction temperatures are achieved by contact of the heavy hydrocarbon feed with heated solid particles ... | 12/04/1990 |
