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| Number | Title | Issue Date |
| 5549815 | Method for fluidizing a dense phase bed of solids Disclosed is a method for fluidizing a dense phase bed of solid particles, preferably a method for fluidizing a dense phase bed of solid catalyst particles. The method includes the steps of continuously supplying a flowing fluid stream in a downward direc... | 08/27/1996 |
| 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 |
| 5547564 | Catalytic Cracking Catalytic cracking catalysts which contain bayerite and/or eta alumina are used to process hydrocarbon feedstocks that contain nickel.... | 08/20/1996 |
| 5545604 | Processes for reacting bastnaesite with alkaline-earth metals Bastnaesite and magnesium-containing materials can be chemically reacted by use of reactions wherein alumina is made into a sol by use of a mono-protonic acid and then reacted with a magnesium-containing ingredient (e.g., magnesium acetate) and a bastnaes... | 08/13/1996 |
| 5538623 | FCC catalyst stripping with vapor recycle An FCC process and apparatus operates with closed reactor cyclones and a catalyst stripper using H2 or recycled stripper vapor for stripping gas. Preferably stripper vapor is removed, cooled and condensed, and some vapor recycled to the stripper. Isolatio... | 07/23/1996 |
| 5536392 | Fluid catalytic cracking In fluid catalytic cracking of oils, the feedstock oil is atomized so that its average particle size relative to the average catalyst particle size is such that most oil particles contacting a catalyst particle will form a film having a thickness substant... | 07/16/1996 |
| 5534135 | Synthesis of zeolites A novel zeolite characterized by a large number of secondary pores, a substantially decreased Lattice Constant of below about 24.19 Å, and a substantially decreased Acid Site Density is attained by hydrothermal and acid-treating of an ultrastable Y-zeoli... | 07/09/1996 |
| 5520797 | Fluid catalytic cracking with a zinc ferrite-containing catalyst A process for the fluid catalytic cracking of heavy fraction oils containing heavy metals such as Ni and V, which comprises withdrawing a portion of ferrite-containing catalyst particles circulating in a fluid catalytic cracking apparatus, separating the ... | 05/28/1996 |
| 5516420 | Magnetically separated equilibrium catalyst for specialized cracking Disclosed is a method for improving fluid cracking catalyst performance by increasing metal contamination incrementally while cracking two different feedstocks that have different concentrations of metal contaminants. The relative amount of metal contamin... | 05/14/1996 |
| 5514271 | Underflow cyclone with perforated barrel A cyclone and process for fluidized catalytic cracking of heavy oils is disclosed. Gas and entrained solids are added tangentially around a vapor outlet tube in a cylindrical tube cyclone body. Solids and some gas is withdrawn via a plurality of openings ... | 05/07/1996 |
| 5506365 | Process and apparatus for fluidized-bed hydrocarbon conversion The invention relates to a process for the conversion of petroleum hydrocarbons in the presence of catalyst particles in a fluidized phase in an essentially upflow or downflow tubular reaction zone. The process includes at least one stage of steam crackin... | 04/09/1996 |
| 5503814 | Processes for using bastnaesite/metal oxide compounds Bastnaesite materials and Mg A! (and/or Al B!) materials can be chemically reacted by use of reactions wherein a Al B! ingredient such as alumina is made into a sol by use of a mono-protonic acid before Mg A! (and/or Al B!) materials is (are) reacted with... | 04/02/1996 |
| 5501789 | Process for improved contacting of hydrocarbon feedstock and particulate solids A process wherein a fluidized particulate solid is contacted with a hydrocarbon feedstock in a vertically extending contacting zone, which process comprises introducing a stream of the particulate solid into the contacting zone and introducing a plurality... | 03/26/1996 |
| 5498327 | Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed to fill substantially the entire volume of a reactor vessel by introducing the fluids as alternate an... | 03/12/1996 |
| 5498326 | Process for and apparatus for catalytic cracking in two successive reaction zones The invention relates to a process for catalytic cracking and the associated apparatus in which the cracking reaction takes place in two substantially vertical and successive reaction zones, the loads being introduced into the first zone where it circulat... | 03/12/1996 |
| 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 |
| 5486284 | Catalytic cracking with MCM-49 This invention relates to use of MCM-49 in catalytic cracking. Large amounts of light olefins are produced.... | 01/23/1996 |
| 5474669 | Side mounted FCC stripper with two-zone stripping A side-by-side reactor vessel and stripping vessel arrangement uses a rejection vessel to collect the catalyst from the bottom of a reactor vessel and eliminate stagnant layers of catalyst within the reactor vessel while increasing the efficiency of a str... | 12/12/1995 |
| 5468369 | FCC process with upflow and downflow reactor A process and apparatus for short contact time fluidized catalytic cracking of heavy oil feed using a reactor with an upflow cat:oil vaporizer and a downflow reactor. Catalyst slip permits efficient mixing and limited conversion in the upflow section, whi... | 11/21/1995 |
| 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 |
| 5462652 | Short contact FCC process with catalyst blending A short contact time FCC process raises the coke level of the spent catalyst to improve regeneration zone kinetics and to decrease the total solids circulation through the unit by passing spent catalyst from the reaction zone back to a blending vessel. Th... | 10/31/1995 |
| 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 |
| 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 |
| 5449451 | Fluid catalytic cracking feedstock injection process The invention is a method for mixing feedstock with fluidized catalyst in a fluid catalytic cracking (FCC) riser reactor. A dispersed catalyst suspension is passed upwardly at a velocity of 0.5 to 4 ft/sec. Atomized feedstock is injected downwardly at a v... | 09/12/1995 |
| 5449450 | Hydrocarbon conversion process using a crystalline microporous metallo-zinc phosphate composition Hydrocarbon conversion processes are described which use novel microporous compositions. These compositions have a three-dimensional microporous framework structure of ZnO2, PO2 and M'O2 tetrahedral units, and an intracrys... | 09/12/1995 |
| 5449497 | Plug flow vented riser An FCC reactor achieves greater utilization of the space within the reactor vessel by using a vented riser arrangement having an inlet opening at the bottom of a vented riser collector. The inlet opening at the bottom of the vented riser collector allows ... | 09/12/1995 |
| 5449498 | FCC stripper with multiple integrated disengager A method and apparatus for an FCC process uses means for dissipating turbulent flow at the outlet of a disengaging vessel to provide a quick separation of catalyst from product vapors and to prevent reentrainment of catalyst into the disengaging vessel. T... | 09/12/1995 |
| 5443716 | Process for converting oligomer-containing waste streams to fuels A process is provided for converting a hydrocarbon feedstock comprising at least 2 volume percent of a low molecular weight oligomer to hydrocarbon product useful in the manufacture of fuels comprising contacting the hydrocarbon feedstock with a catalytic... | 08/22/1995 |
| 5443807 | Conversion of carbon monoxide utilizing a perovskite-type rare earth complex oxide catalyst The present invention relates to rare earth complex oxide combustion catalysts wherein perovskite-type rare earth complex oxide active components are carried on a support using mullite as the main phase. The present invention relates also to a process for... | 08/22/1995 |
| 5435906 | Process for catalytically cracking feedstocks paraffin rich comprising high and low concarbon components A process for contemporaneously catalytically cracking a paraffin rich feedstock and a heavy feedstock wherein the feedstocks are segregated prior to catalytic cracking in separate reactors with regenerated particulate catalyst solids. The process provide... | 07/25/1995 |
| 5430222 | Apparatus for the catalytic cracking in the fluid state of hydrocarbon feedstocks An apparatus for the catalytic cracking in the fluid state of hydrocarbon feedstocks which comprises a riser-type column (2); at the top of the riser (2) and concentric therewith, a chamber (1) for separation of the hydrocarbon vapors and the coke-laden c... | 07/04/1995 |
| 5413699 | FCC process with fines tolerant SCR reactor A process for reducing NOx emissions and an FCC process using same as a flue gas cleanup stage are disclosed. Gas containing NOx and entrained catalyst fines is passed up through a bed of catalyst at a sufficient velocity to expand and fluidize the cataly... | 05/09/1995 |
| 5409872 | FCC process and apparatus for cooling FCC catalyst during regeneration A process and apparatus for fluidized catalytic cracking (FCC) with cooling of FCC catalyst during regeneration in a baffled heat exchanger attached to the regenerator. The heat exchanger has a vertical baffle defining an inlet and an outlet side. Lift ga... | 04/25/1995 |
| 5409598 | Method of hydroprocessing On-stream catalyst replacement hydroprocessing method wherein an upstream mixture of hydrogen and hydrocarbon liquid counter flows through a downwardly moving bed of hydroprocessing catalyst in a reactor vessel. The mixed feed stream of hydrogen and liqui... | 04/25/1995 |
| 5393414 | FCC process with enclosed vented riser An FCC process uses a highly efficient separation device to remove product from the catalyst so that the reactor vessel receives a low volume of feed hydrocarbons and riser by-products. The separation device encloses an upwardly directed outlet end of a b... | 02/28/1995 |
| 5393415 | FCC process with enclosed vented riser An FCC process uses a highly efficient separation device to remove product from the catalyst so that the reactor vessel receives a low volume of feed hydrocarbons and riser by-products. The separation device encloses an upwardly directed outlet end of a b... | 02/28/1995 |
| 5393412 | Combination magnetic separation, classification and attrition process for renewing and recovering particulates Optimized utilization of combinations of fluid catalyst magnetic separator, classifier, and/or attriter can be used to achieve lower catalyst cost, and better catalyst activity and selectivity through control of metal-on-catalyst, particle size and partic... | 02/28/1995 |
| 5391289 | FCC process with rapid separation of products A method of fluid catalytic cracking of hydrocarbon feed which for rapid separation of the fluid catalytic cracking catalyst from the mixture of gases and products, utilizes a U-turn inertial separator directly coupled to cyclone separation.... | 02/21/1995 |
| 5389239 | Control method for direct-coupled FCC riser cyclone In a direct-coupled cyclone system, the riser cyclone is positioned external to a containment vessel. The riser cyclone separator discharges separated catalyst to a catalyst stripper internal to the containment vessel. Means is provided for withdrawing st... | 02/14/1995 |
| 5389232 | Riser cracking for maximum C3 and C4 olefin yields A process for catalytically cracking a heavy feed in a single riser reactor FCC unit, with delayed riser quench and large amounts of shape selective cracking additive is disclosed. The feed is preferably quenched after at least 1 second of riser cracking.... | 02/14/1995 |
