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| Number | Title | Issue Date |
| 6551660 | Method for removing reactive metal from a reactor system A method for reducing catalyst contamination in a hydrocarbon conversion reactor system, comprising the steps of contacting at least a portion of a metal-coated hydrocarbon conversion reactor system comprising a reactive metal with a getter to produce a m... | 04/22/2003 |
| 6419986 | Method for removing reactive metal from a reactor system A method of removing reactive metal from a metal-coated reactor system, comprising contacting at least a portion of a metal-coated reactor system containing reactive metal with a getter to produce movable metal, and fixating the movable metal, the getter,... | 07/16/2002 |
| 6106695 | Catalytic hydrocracking process A process to provide a multiplicity of hydrocracking reaction zones containing hydrocracking catalyst wherein the catalyst is rejuvenated or reactivated while the process unit remains on-stream by the periodic exposure of partially spent catalyst to hot r... | 08/22/2000 |
| 5985134 | Startup of magnetic separation process in an FCC unit A startup method for a fluidized catalytic cracking (FCC) unit operating with a magnetic catalyst separation means is disclosed. Magnetic strength, or separation severity, is maintained or increased until most of the catalyst has passed through the magnet... | 11/16/1999 |
| 5972201 | Hydrocarbon conversion catalyst additives and processes Magnetic separation of fluid cracking catalyst and magnetic hooks can be improved by adding antimony, in the feed or during catalyst manufacture, to enhance the magnetic susceptibility, thus increasing the separation efficiency of the older less active fl... | 10/26/1999 |
| 5919352 | Integrated residua upgrading and fluid catalytic cracking A process wherein a residuum feedstock is upgraded in a short vapor contact time thermal process unit comprised of a horizontal moving bed of fluidized hot particles, then fed to a fluid catalytic cracking process unit. Hot flue gases from the fluid catal... | 07/06/1999 |
| 5618406 | 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... | 04/08/1997 |
| 5565087 | Method for providing a tube having coke formation and carbon monoxide inhibiting properties when used for the thermal cracking of hydrocarbons The rate of formation of carbon on the surfaces of thermal cracking tubes and the production of carbon monoxide during thermal cracking of hydrocarbons are inhibited by the use of cracking tubes treated with an antifoulant, including tin compound, silicon... | 10/15/1996 |
| 5466363 | Integrated process for hydrotreating heavy oil, then manufacturing an alloy or steel using a carbon-based catalyst Use of a carbon-based catalyst composition, particularly activated-carbon, optionally containing at least one metal selected from Ni, Co, Mo, W, Fe, or mixtures thereof, for heavy oil hydroprocessing. Recovery and partial gasification of the catalyst to p... | 11/14/1995 |
| 5446229 | Thermal cracking process with reduced coking A process for the production of olefins in an olefin plant, which includes an olefin pyrolysis furnace having pyrolysis tubes in which hydrocarbon feedstock is cracked, comprises introducing hydrocarbon feed substantially free of phosphorous-containing co... | 08/29/1995 |
| 5445728 | Method for the reactivation of spent alumina-supported hydrotreating catalysts Spent or inactive alumina-supported catalysts removed from a catalytic hydrotreating process and having carbonaceous and metallic deposits thereon are reactivated. After a solvent wash to remove process oils, the spent catalyst is contacted with steam at ... | 08/29/1995 |
| 5401384 | Antimony and tin containing compound, use of such a compound as a passivating agent, and process for preparing such a compound An antimony and tin containing compound for passivating contaminant metals to which a catalyst is exposed during fluid catalytic cracking of hydrocarbons containing said contaminant metals, said compound having a composition as follows (R*)x Sb... | 03/28/1995 |
| 5384041 | Composition for passivating vanadium in catalytic cracking and preparation thereof Disclosed is a vanadium trap for use in FCC which comprises a major amount of calcined kaolin clay, free magnesium oxide and an in situ formed magnesium silicate cement binder. Also disclosed are procedures for the preparation of the trap by forming a slu... | 01/24/1995 |
| 5378349 | Passivated catalysts for cracking process A zeolite-containing cracking catalyst is passivated with compounds of (a) antimony and (b) zirconium and/or tungsten. The thus-passivated cracking catalyst is employed in a process for catalytically cracking a hydrocarbon-containing oil feed. In another ... | 01/03/1995 |
| 5358630 | Regenerating zeolitic cracking catalyst A method for countering the adverse effect of contaminating metals on a crystalline aluminosilicate catalyst comprising contacting the catalyst with a reducing gas under suitable conditions. In a preferred embodiment, the catalyst contains antimony.... | 10/25/1994 |
| 5328594 | Magnetic separation of old from new cracking catalyst by means of heavy rare earth "magnetic hooks" This invention relates to an improved catalytic process for carrying out heavy hydrocarbon conversion, usually, but not necessarily, in the presence of nickel and vanadium on the catalyst and in the feedstock, by catalytic cracking gas oils and heavy carb... | 07/12/1994 |
| 5298153 | Cracking process using an attrition resistant catalyst An attrition resistant catalytic cracking catalyst is prepared by spray drying an aqueous slurry containing a molecular sieve having cracking activity, a clay such as kaolin, a silica sol and aluminum chlorhydroxide. The resultant catalyst has a high attr... | 03/29/1994 |
| 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 |
| 5260240 | Process for the demetallization of FCC catalyst A process is disclosed for passivating the reactivity of contaminant metals, such as nickel and vanadium, which have been deposited on a catalytic cracking catalyst, by adding to the cracking catalyst a mixture of a calcium-containing material and a magne... | 11/09/1993 |
| 5254513 | Method for the reactivation of spent alumina-supported hydrotreating catalysts Spent or inactive alumina-supported catalysts removed from a catalytic hydrotreating process and having carbonaceous and metallic deposits thereon are reactivated. After a solvent wash to remove process oils, the spent catalyst is contacted with steam at ... | 10/19/1993 |
| 5250482 | Process for magnetic beneficiating petroleum cracking catalyst A process for beneficiating a particulate zeolite petroleum cracking catalyst having metal values in excess of 1000 ppm nickel equivalents. The particulate catalyst is passed through a magnetic field in the range of from about 2 Tesla to about 5 Tesla gen... | 10/05/1993 |
| 5232885 | Process for regenerating a spent resin hydroprocessing catalyst using a group IV metal A method of regenerating a contaminant metal-containing, coke deactivated, molecular sieve-free catalyst having at least one hydrogenation metal and at least one Group IV metal deposited on an inorganic oxide support comprising contacting the catalyst wit... | 08/03/1993 |
| 5230869 | Addition of magnetically active moieties for magnetic beneficiation of particulates in fluid bed hydrocarbon processing By continuously or intermittently adding amounts of magnetically active moieties, e.g. iron compounds, over time so that the moiety deposits on a catalyst or sorbent in a fluid catalytic cracker or similar circulating hydrocarbon conversion unit, older ca... | 07/27/1993 |
| 5228978 | Means for and methods of low sulfur and hydrotreated resids as input feedstreams The inventive solvent extraction process uses hydrotreated (HTR) and low sulfur (LSR) resids feedstreams in a single deasphalter unit and in a way that optimizes the disposition of the oils, resins, and asphaltene fractions of each resid for downstream pr... | 07/20/1993 |
| 5209840 | Separation of active catalyst particles from spent catalyst particles by air elutriation Spent hydrotreating catalyst having carbonaceous and metallic deposits and of regular geometric shape after being stripped of process oil is fluidized by flowing air upwardly through the catalyst at a velocity sufficient to expand the bed thereby segregat... | 05/11/1993 |
| 5198098 | Magnetic separation of old from new equilibrium particles by means of manganese addition An improved catalytic process for heavy hydrocarbon conversion, (usually, but not necessarily, in the presence of nickel and vanadium on the catalyst and in the feedstock.) to produce lighter molecular weight fractions. Manganese, which has paramagnetic p... | 03/30/1993 |
| 5192724 | Reactivation of spent cracking catalysts A spent metal contaminated zeolite-containing catalytic cracking catalyst composition is reactivated by a process which comprises contacting with (a) dissolved lactic acid and either (b1) at least one dissolved calcium compound or, alternatively, (b2) at ... | 03/09/1993 |
| 5188995 | Reactivation and passivation of spent cracking catalysts A spent metal-contaminated zeolite-containing catalytic cracking catalyst is reactivated by a process which comprises contacting the spent catalyst with at least one dissolved carboxylic acid and at least one antimony compound.... | 02/23/1993 |
| 5174890 | Catalytic cracking using a metals scavenging composition A metals scavenging composition comprising a rare earth component and a layered magnesium silicate, such as sepiolite or attapulgite, is mixed with separate particles of a cracking catalyst and the mixture used to crack hydrocarbon feedstocks containing r... | 12/29/1992 |
| 5171424 | Magnetic separation of old from new cracking catalyst by means of heavy rare earth "magnetic hooks" This invention relates to an improved catalytic process for carrying out heavy hydrocarbon conversion, usually, but not necessarily, in the presence of nickel and vanadium on the catalyst and in the feedstock, by catalytic cracking gas oils and heavy carb... | 12/15/1992 |
| 5169517 | Process for the treatment of petroleum fractions containing metals, in the presence of solid particles, including a magnetohydrostatic separation stage for the said particles and the recycling of part of them Process for the treatment of a hydrocarbon fraction containing metals and comprising the following stages: (a) the said hydrocarbon fraction is treated in the presence of mean density particles (do) under conditions for eliminating at least par... | 12/08/1992 |
| 5155073 | Demetallization of hydrocarbon conversion catalysts A demetallization process for catalysts used for chemical conversion of hydrocarbons, the catalysts containing at least vanadium as a metal poison, wherein the poisoned catalyst is contacted in a sulfiding zone with a sulfiding agent and a hydrocarbon hav... | 10/13/1992 |
| 5151391 | Reactivation of spent, metal-containing cracking catalysts A spent metal contaminated zeolite-containing catalytic cracking catalyst composition is reactivated by a process which comprises contacting with an aqueous solution of HC1 and/or HNO3 and/or H2 SO4. The thus reactivated c... | 09/29/1992 |
| 5141624 | Catalytic cracking process A catalytic process for cracking vanadium-containing oils employs a physical mixture of (a) zeolite embedded in an inorganic matrix material and (b) magnesium oxide on alumina support.... | 08/25/1992 |
| 5141904 | Reactivation of spent cracking catalysts A spent metal contaminated zeolite-containing catalytic cracking catalyst composition is reactivated by a process which comprises contacting with an aqueous solution of at least one carboxylic acid (preferably at least one of formic acid, acetic acid, cit... | 08/25/1992 |
| 5124024 | Method for extending hydroconversion catalyst life A method for prolonging a hydroconversion catalyst life-time is provided. An additive functional to partially redirect the deposition of catalytic poisoning agents on the catalyst is utilized. The additive may comprise a chemically inert, porous carbonace... | 06/23/1992 |
| 5096568 | Metals passivation A zeolite-containing catalytic cracking catalyst having been passivated by treatment with an aqueous solution which has been prepared by mixing an antimony oxide, ammonium bifluoride and water, at an atomic ratio of F:Sb in excess of about 6:1, is used in... | 03/17/1992 |
| 5064524 | Passivation of FCC catalysts The present invention is directed to a method of using cerium and/or cerium containing compounds to passivate nickel contaminants in hydrocarbon feedstocks which are used in catalytic cracking processes.... | 11/12/1991 |
| 5059302 | Method and apparatus for the fluid catalytic cracking of hydrocarbon feed employing a separable mixture of catalyst and sorbent particles The present invention features the use of a particulate sorbent and a particulate FCC catalyst, which are physically separable, sequentially in the same FCC riser, followed by separation of commingled spent catalyst and sorbent particles from vapors, and ... | 10/22/1991 |
| 5057205 | Additive for vanadium and sulfur oxide capture in catalytic cracking A catalytic cracking process especially useful for the catalytic cracking of high metals content feeds including resids in which the feed is cracked in the presence of a catalyst additive comprising an alkaline earth metal oxide and an alkaline earth meta... | 10/15/1991 |
