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| Number | Title | Issue Date |
| 8128811 | Hydroprocessing using rejuvenated supported hydroprocessing catalysts Methods for hydroprocessing of hydrocarbon feedstocks, including hydrodesulfurization and hydrodenitrogenation, using rejuvenated supported metallic catalysts are provided. The supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, are reju... | 03/06/2012 |
| 7232516 | Desulfurization with octane enhancement A desulfurization system employing a system of fluidizable and circulatable solid particles to desulfurize a hydrocarbon-containing fluid in a fluidized bed reactor. The solid particulate system includes solid sorbent particles operable to remove sulfur from the hyd... | 06/19/2007 |
| 7186328 | Process for the regeneration of an adsorbent bed containing sulfur oxidated compounds A process for the cyclical regeneration of an adsorbent bed containing sulfur-oxidated compounds. The adsorbent bed is used to adsorb and separate sulfur-oxidated compounds from a hydrocarbonaceous stream to produce an adsorbent having adsorbed sulfur-oxidated compo... | 03/06/2007 |
| 7172685 | Desulfurization system with novel sorbent transfer mechanism A hydrocarbon desulfurization system employing regenerable solid sorbent particulates in a fluidized bed desulfurization reactor. The sulfur-loaded sorbent particulates are continuously withdrawn from the reactor and transferred to a regenerator. A novel solids tran... | 02/06/2007 |
| 7160438 | Process for removal of nitrogen containing contaminants from gas oil feedstreams The present invention is directed to the removal of nitrogen and sulfur containing impurities from high molecular weight petroleum feedstock obtained from fluid cracking catalyst or distillation zone of a petroleum treatment plant. The present process comprises firs... | 01/09/2007 |
| 7087156 | Process for removal of nitrogen containing contaminants from gas oil feedstreams The present invention is directed to the removal of nitrogen and sulfur containing impurities from high molecular weight petroleum feedstock obtained from fluid cracking catalyst or distillation zone of a petroleum treatment plant. The present process comprises firs... | 08/08/2006 |
| 6955752 | Desulfurization and novel sorbents for same Sorbent compositions for the removal of sulfur from cracked-gasoline and diesel fuels are prepared by the impregnation of a sorbent support comprising zinc oxide, expanded perlite, and alumina with a promotor metal followed by reduction of the valence of the promoto... | 10/18/2005 |
| 6920802 | Adsorption trap for the detection of surface-active agents in gas streams A method and apparatus are provided for adsorbing surface-active compounds, such as corrosion inhibitors and water, from pressurized gas streams utilizing existing gas pipeline sampling valves. The apparatus includes an adsorption trap assembly containing an adsorpt... | 07/26/2005 |
| 6673239 | Hydrocarbon purificatin system regeneration A system and process for removing water and heteroatom-containing compounds from hydrocarbons and for regenerating the adsorbent used in the system and process is disclosed and includes contacting the hydrocarbon stream with a water adsorbent and a hetero... | 01/06/2004 |
| 6649555 | Reactivation of deactivated sorbents A deactivated sorbent composition is reactivated by contacting the deactivated sorbent with a reducing stream under activation conditions sufficient to reduce the amount of sulfates associated with the sorbent composition.... | 11/18/2003 |
| 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 |
| 6565741 | Process for desulfurization of petroleum distillates The desulfurization of petroleum distillates can be carried out by cyclic low-temperature adsorption of oxidized sulfur compounds with activated carbon followed by regeneration of the activated carbon using an organic solvent. The activated carbon used in... | 05/20/2003 |
| 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 |
| 6482316 | Adsorption process for producing ultra low hydrocarbon streams The instant invention is directed to a method for reducing the amount of sulfur in hydrocarbon streams comprising the steps of: (a) contacting a hydrocarbon stream comprising hydrocarbons and sulfur compounds with an adsorbent selective for adsorption of said ... | 11/19/2002 |
| 6468417 | Filtering lubricating oils to remove haze precursors A dewaxed oil having a tendency to form a haze at ambient or sub-ambient temperatures is contacted with a solid adsorbent to remove at least a portion of the haze precursors, thereby reducing the haze-forming tendency of the dewaxed oil.... | 10/22/2002 |
| 6468418 | Sorbent treating of lubricating oils to remove haze precursors A base oil feed having a tendency to form a haze at ambient or sub-ambient temperatures is contacted with a solid adsorbent to remove at least a portion of the haze precursors, thereby reducing the haze-forming tendency of the base oil feed.... | 10/22/2002 |
| 6245223 | Selective adsorption process for resid upgrading (law815) The present invention is a process to remove a major portion of metals and coke precursors from a hydrocarbon stream. The steps of the process include contacting the feedstream with a hydrocarbon insoluble adsorbent, recovering the oil which does not adso... | 06/12/2001 |
| 6129833 | Catalytic cracking with reduced emission of sulfur oxides Sulfur oxides are removed in the regenerator zone and rapidly released as H2 S in the reactor zone of an FCC system employing a particulate SOx catalytic/absorbent comprising Cu and an alkali metal oxide. Embodiments include the use ... | 10/10/2000 |
| 6111162 | Process for removing oxygenated contaminants from hydrocarbon streams Process for selectively removing oxygenated contaminants from streams prevalently containing hydrocarbons with from 3 to 8 carbon atoms characterized in that it comprises an adsorption step wherein said contaminants are adsorbed by an adsorbent essentiall... | 08/29/2000 |
| 6107535 | Process for removing nitrogenated and sulfurated contaminants from hydrocarbon streams A process for selectively removing nitrogenated and/or sulfurated contaminants from streams prevalently containing hydrocarbons with from 3 to 8 crbon atoms characterized in that it comprises an adsorption step wherein said contaminants are adsorbed by an... | 08/22/2000 |
| 6019887 | Nitrile selective removal process An adsorption/desorption process for selectively removing nitriles from a hydrocarbon feedstock includes the steps of: (a) providing a hydrocarbon feedstock having a nitrile content of less than or equal to about 400 ppm; (b) providing an adsorbent for se... | 02/01/2000 |
| 5928500 | Removal of halogenated organic compounds from hydrocarbon streams This invention is a process for removing minor amounts of organic halide e.g., organic chloride, contaminants from hydrocarbon feedstocks by contact with a regenerable solid adsorbent comprising a metal and/or metal hydride selected from nickel, cobalt or... | 07/27/1999 |
| 5843300 | Removal of organic sulfur compounds from FCC gasoline using regenerable adsorbents Removal of organic sulfur compounds, especially aromatic sulfur compounds from an FCC feedstock with minimal adsorption of aromatic hydrocarbons is achieved using a zeolite X exchanged with alkali or alkaline earth cations. KX is an especially effective a... | 12/01/1998 |
| 5792897 | Hydrocardon recovery from corrosive effluent stream An adsorption arrangement in combination with a catalytic hydrocarbon conversion process suspends non-hydrocarbon materials that act to enhance the operation of the conversion zone by using an adsorption zone arrangement to keep the compounds in recircula... | 08/11/1998 |
| 5730860 | Process for desulfurizing gasoline and hydrocarbon feedstocks An apparatus and method for treating a liquid hydrocarbon stream useful as a precursor for transportation fuel and which contains an unacceptably high level of heteroatom compounds is provided for the removal of a significant portion of the heteroatom com... | 03/24/1998 |
| 5650063 | Removal of acidic halides from hot gas streams and attrition regeneration of caustic Acidic halides, especially chlorides, are removed from a dry fluid stream by contact with dry particles of solid caustic. The solid caustic particles are preferably non-porous, and disposed as a fluidized bed. Salts deposit on the surface of the caustic a... | 07/22/1997 |
| 5648311 | Catalyst for hydrorefining The invention relates to a catalytic hydrorefining of mixtures of hydrocarbons which contain hetero atoms such as nitrogen, sulphur, halogens and/or oxygen. The characterizing feature of the invention is that nickel or a nickel-molybdenum alloy containing... | 07/15/1997 |
| 5569331 | Method and apparatus for recycling oil-soaked boom and pads A method and apparatus are provided for removing oil from absorbent materials of the type used in components for absorbing oil and containing oil spills. The components are first passed through a press to squeeze some of the oil from the components. The c... | 10/29/1996 |
| 5454933 | Deep desulfurization of distillate fuels A process for providing distillate products which are substantially sulfur free, which process comprises subjecting a distillate stream to conventional hydrodesulfurization conditions including a catalyst comprised of a Group VI metal and at least one Gro... | 10/03/1995 |
| 5427689 | Separation of polar substances from hydrocarbons A process for separating polar substances (preferably water, alcohols, ethers, aldehydes, nitriles) from hydrocarbon fluids employs a sorbent comprising aluminum borate and zirconium borate. Preferably, the sorbent composition has been prepared by copreci... | 06/27/1995 |
| 5271835 | Process for removal of trace polar contaminants from light olefin streams A process is disclosed for improving catalyst performance and yields in the manufacture of motor gasoline components. More particularly the process is directed to the removal of H2 S, sulfur compounds, trace amounts of acetonitrile or acetone o... | 12/21/1993 |
| 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 |
| 5244566 | Process for deabsorbing oil from oil absorbent A process is shown for deabsorbing oil from an oil absorbent material. A citric oil-in-water emulsion is formulated having an aqueous external phase and having a dispersed internal phase which is comprised of a distilled citric oil. The hydrocarbon contam... | 09/14/1993 |
| 5230791 | Process 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 treated with an organic ... | 07/27/1993 |
| 5110480 | On-line rejuvenation of spent absorbents The process relates to on-line rejuvenation of adsorbent beds which are used for removing mercury from mercury contaminated feeds.... | 05/05/1992 |
| 4980045 | Heavy oil pretreatment process with reduced sulfur oxide emissions A process is provided for the pretreatment of heavy oil feeds to demetalate and remove coke precursors. Inert, sorbent material is utilized in a reaction zone to effect the contaminant removal and is cycled to a regeneration zone. The sorbent also adsorbs... | 12/25/1990 |
| 4971682 | Recovery of co-adsorbed hydrocarbons from molecular sieve adsorption units In the purification of light hydrocarbons to remove carbonyl sulfide impurity by selective adsorption thereof on molecular sieve adsorbents, significant losses of the hydrocarbon are incurred by its coadsorption on the adsorbent with the COS impurity. Con... | 11/20/1990 |
| 4935399 | Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system Molecular sieves are used to remove sulfur compounds (e.g., COS and H2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost be vapo... | 06/19/1990 |
| 4935400 | Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system Molecular sieves are used to remove sulfur compounds (e.g., COS and H2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost by vapo... | 06/19/1990 |
| 4915820 | Removal of coke and metals from carbo-metallic oils Coke and metals are removed from a carbo-metallic oil by contacting the carbo-metallic oil in a riser reaction zone with a relatively inert particulate sorbent material in the presence of steam and the resulting coked particulate sorbent material is regen... | 04/10/1990 |
