With Subsequent Treatment Of Products Patents (Class 208/95)
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Patent number: 5089114Abstract: A method for processing heavy crude oils comprising a) atmospheric distillation of a heavy crude oil having a high content of metals, asphaltenes and sulfur; b) solvent extraction of the atmospheric distillation residue to obtain an extract with characteristics equivalent to those which an atmospheric residue derived from light crude oil and a raffinate fraction, solid at ambient conditions, in which are concentrated the asphaltenes, metals and sulfur present in the original crude oil; c) vacuum distillation of the deasphalted extract, obtaining a light fraction or gas oils with characteristics adequate to be subjected to a secondary conversion process, plus a bottoms fraction or vacuum residue; d) treatment of the vacuum gas oils in a conversion stage and e) subjecting the bottoms of raffinate from the extraction stage to a metallurgical process, in admixture with cokeable coal and coke fines to production of metallurgical coke.Type: GrantFiled: November 22, 1989Date of Patent: February 18, 1992Assignee: Instituto Mexicano Del PetroleoInventors: Abel M. Tovar, Oscar H. B. Mendizabal, Leonardo M. Olmos, Carlos G. A. Sanchez, Roberto L. Lorenzo, Roldofo C. Barba, Rene H. Perez
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Patent number: 5043058Abstract: Effective quenching is provided in a catalytic cracking process to increase product yield and decrease thermal cracking. To this end, the quench is injected at special locations and a special quench is used. In the illustrated embodiment, the quench is injected into the oil product immediately downstream of an external gross cut separator before the product enters a disengaging vessel and the quench comprises cycle oil.Type: GrantFiled: March 26, 1990Date of Patent: August 27, 1991Assignee: Amoco CorporationInventors: John M. Forgac, F. William Hauschildt, George P. Quinn, Douglas N. Rundell, John G. Schwartz, Mark S. Camp
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Patent number: 5037528Abstract: High viscosity index, low pour point lubricants are produced by the oligomerization of a wax-derived lubricant fraction. The fraction may be produced from slack wax or de-oiled wax by hydroisomerization over zeolite beta or hydrocracking/isomerization over an amorphous catalyst followed by selective dewaxing, preferably by catalytic dewaxing over a highly shape selective zeolite such as ZSM-23. The preferred peroxides are ditertiary alkyl peroxides such as ditertiary butyl peroxide (DTBP) and are typically used at temperatures of 100.degree.-300.degree. C.Type: GrantFiled: April 30, 1990Date of Patent: August 6, 1991Assignee: Mobil Oil CorporationInventors: William E. Garwood, Quang N. Le, Stephen S. Wong
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Patent number: 5024750Abstract: Heavy hydrocarbon oil, containing asphaltene, sulfur and metal contaminants, is hydrotreated in the presence of a hydrotreating catalyst having a small pore diameter in an initial process step to remove sulfur and metal contaminants. Removal of additional metal and sulfur contaminants is then accomplished in a second process step by solvent deasphalting, wherein the size of the pore diameter of the hydrotreating catalyst utilized in the initial hydrotreating step affects the metals rejection in the subsequent solvent deasphalting step. In a third process step the deasphalted oil is catalytically cracked substantially in the absence of added hydrogen to provide lower boiling hydrocarbon products.Type: GrantFiled: December 26, 1989Date of Patent: June 18, 1991Assignee: Phillips Petroleum CompanyInventors: Edward L. Sughrue, II, Patricia A. Tooley, Brent J. Bertus, Bille S. Grayson
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Patent number: 4994168Abstract: The quality and yield of dewaxed, hydrotreated lube oil base stocks are improved by reducing the top temperature in the hydrotreated lube stripper so as to increase the proportion of heavy kerosene components in the lube oil base stock. The separation system provides for a two stage stripping of the lube oil fraction such that the kerosene fraction stripped from the lube product in the primary product stripper under vacuum is stripped in a second stage stripper at a higher pressure with recycle of the heavy kerosene fraction as a reflux stream to the primary vacuum stripper so that a product with improved viscosity index and flash point is separated in the primary stripper.Type: GrantFiled: October 21, 1988Date of Patent: February 19, 1991Assignee: Mobil Oil CorporationInventor: Mohsen N. Harandi
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Patent number: 4950384Abstract: A hydrocarbonaceous feedstock is hydrocracked by contacting the feedstock in a first reaction stage at elevated temperature and pressure in the presence of hydrogen with a first hydrocracking catalyst to obtain a first effluent, separating from the first effluent a gaseous phase and a liquid phase at substantially the same temperature and pressure as prevailing in the first reaction stage, contacting the liquid phase of the first effluent in a second reaction stage at elevated temperature and pressure in the presence of hydrogen and a second hydrocracking catalyst to obtain a second effluent, obtaining at least one distillate fraction and a residual fraction from the combination of the gaseous phase and the second effluent by fractionation, and recycling at least a part of the residual fraction to a reaction stage.Type: GrantFiled: June 29, 1989Date of Patent: August 21, 1990Assignee: Shell Oil CompanyInventors: Dees J. W. Groeneveld, Swan T. Sie
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Patent number: 4933067Abstract: A process is provided for preparing pipelineable syncrude and asphalt from a heavy crude oil. The syncrude has substantially less metals content and Conradson Carbon Residue than the precursor crude oil, and may be used as feed for catalytic cracking or as fuel oil. The asphalt is adaptable for paving. The process consists of air-blowing the crude, deasphalting the air-blown product, and thermally cracking the deasphalted oil to reduce its viscosity, in that order.The process is adaptable to on-site use in or near a heavy oil field, using skid-mounted equipment.Type: GrantFiled: June 30, 1989Date of Patent: June 12, 1990Assignee: Mobil Oil CorporationInventor: Lillian A. Rankel
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Patent number: 4925573Abstract: Process for separating a mixed-phase hydrocarbonaceous effluent originating from the conversion of a hydrocarbonaceous feedstock in the presence of hydrogen at elevated temperature and pressure in a multiple separator system, which effluent contains hydrogen, normally liquid hydrocarbonaceous components and normally gaseous hydrocarbonaceous components by(i) separating in a first separation zone the effluent into a first liquid phase (L1) and a first vapor phase (V1),(ii) cooling the first vapor phase obtained to a temperature in the range between 25.degree. and 85.degree. C.Type: GrantFiled: March 30, 1989Date of Patent: May 15, 1990Assignee: Shell Internationale Research Maatschappij, B.V.Inventor: Sotiris Vorlow
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Patent number: 4902405Abstract: A process for converting a gas oil range petroleum feedstock into lighter petroleum products by:(a) charging the gas oil range petroleum feedstock and hydrogen to a first fixed bed hydrocracking zone containing a hydrocracking catalyst at hydrocracking conditions to produce a first hydrocracking zone product stream;(b) separating the first fixed bed hydrocracking zone product stream in a fractionation zone into a petroleum products stream and a bottoms stream;(c) charging the bottoms stream and hydrogen to a second fixed bed hydrocracking zone containing a hydrocracking catalyst at hydrocracking conditions to produce a second fixed bed hydrocracking zone product stream;(d) cooling the second fixed bed hydrocracking zone product stream to a temperature below about 250.degree. F.;(e) recycling a first portion of the cooled second fixed bed hydrocracking zone product stream to the fractionation zone; removing materials having a boiling range from about 500.degree. to about 650.degree. F.Type: GrantFiled: January 13, 1988Date of Patent: February 20, 1990Assignee: Atlantic Richfield CompanyInventors: Alison J. MacLean, Richard L. Holloway, Valerie A. Lawson, John W. Cronen
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Patent number: 4867862Abstract: I disclose a single stage, multilayered catalyst system capable of hydrodehazing and hydrofinishing a solvent dewaxed lube oil base stock. In the first layer, I catalytically dewax the solvent dewaxed stock. In the second layer, I hydrofinish the catalytically dewaxed stock. My invention also relates to a process for hydrodewaxing and hydrofinishing a solvent dewaxed lube oil base stock.Type: GrantFiled: April 20, 1987Date of Patent: September 19, 1989Assignee: Chevron Research CompanyInventor: James N. Ziemer
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Patent number: 4846958Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and recycling treated product.Type: GrantFiled: May 26, 1988Date of Patent: July 11, 1989Assignee: Lummus Crest, Inc.Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
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Patent number: 4840722Abstract: A non-catalytic process for the conversion of a hydrocarbonaceous stream containing less than about 5 weight percent halogenated organic compounds which process comprises: (a) reacting the hydrocarbonaceous stream in the presence of hydrogen in a reaction zone at reaction conditions including an elevated temperature selected to convert at least a portion of the halogenated organic compounds to more highly hydrogenated organic compounds; and (b) recovering a hydrocarbonaceous product stream containing lower halogen content.Type: GrantFiled: April 1, 1988Date of Patent: June 20, 1989Assignee: UOPInventors: Russell W. Johnson, Lee Hilfman
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Patent number: 4832819Abstract: A process for producing a pumpable syncrude from a Fischer-Tropsch wax by fractionating the wax into relatively low boiling fraction containing oxygenate compounds and a relatively high boiling fraction which is substantially free of oxygenate compounds and thereafter isomerizing/hydrocracking the low boiling fraction in the presence of hydrogen and a fluorided Group VIII metal-on-alumina catalyst. The preferred Group VIII metal is platinum.The pumpable syncrude is thereafter fractionated to produce a low boiling fraction which is thereafter isomerized/hydrocracked in the presence of hydrogen and a fluorided Group VIII metal-on-alumina catalyst to produce upgraded middle distillate fuel products. The preferred catalyst for middle distillate production is a fluorided platinum-on-alumina catalyst where a major portion of the fluoride within the catalyst is present as aluminum fluoride hydroxide hydrate.Type: GrantFiled: December 18, 1987Date of Patent: May 23, 1989Assignee: Exxon Research and Engineering CompanyInventor: Glen P. Hamner
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Patent number: 4773986Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and provide a remaining product having a Shell Hot Filtration number of less than 0.25.Type: GrantFiled: December 18, 1986Date of Patent: September 27, 1988Assignee: Lummus Crest, Inc.Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
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Patent number: 4624772Abstract: A fluid catalytic cracking (FCC) apparatus and process comprising a reactor riser zone, a primary and a secondary cyclones, connected in series to the riser zone, and a stripping zone. The riser zone, the primary and the secondary cyclones, and the stripping zone, are placed within a single reactor vessel. The primary cyclone is connected to the reactor riser zone by an enclosed conduit which prevents random post-riser thermal cracking of the hydrocarbons after they exit the reactor riser zone. The conduit contains a trickle valve, or other means, to accommodate sudden increased surges of flow of the hydrocarbons and catalyst mixture.Type: GrantFiled: November 8, 1985Date of Patent: November 25, 1986Assignee: Mobil Oil CorporationInventors: Frederick J. Krambeck, Klaus W. Schatz
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Patent number: 4623443Abstract: A hydrocarbon conversion process wherein metal-coated or metal-contaminated cracking catalyst is regenerated, reduced and then used to hydrogenate an olefin.Type: GrantFiled: February 7, 1984Date of Patent: November 18, 1986Assignee: Phillips Petroleum CompanyInventor: Stone P. Washer
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Patent number: 4579646Abstract: This invention relates to a process for hydroconverting a hydrocarbon chargestock having the steps of: heating the chargestock to produce a minor amount of coke; contacting the coke within the chargestock with a minor effective amount of an oil-soluble metal compound, the metal being selected from the group consisting of Groups IV-B, V-B, VI-B, VII-B, and VIII of the Periodic Table of Elements, and mixtures thereof; contacting the metal compound and the coke within the chargestock with a hydrogen-containing gas under conditions to produce a solid catalyst within the chargestock capable of promoting hydroconversion of at least a portion of the chargestock; contacting the chargestock containing the catalyst with hydrogen under hydroconversion conditions; and recovering a hydroconverted substantially-hydrocarbon product.Type: GrantFiled: July 13, 1984Date of Patent: April 1, 1986Assignee: Atlantic Richfield Co.Inventors: Martin P. Grosboll, Paul H. Dittmar
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Patent number: 4465606Abstract: Hydroprocessed hydrocarbon compositions are inhibited or prevented from forming sediment upon exposure to light by the addition of chemical additives. These sediment inhibiting additives are polyalkenylsuccinimides, calcium sulfonates, metal phenates, polyol esters, and mixtures thereof.Type: GrantFiled: July 22, 1982Date of Patent: August 14, 1984Assignee: Union Oil Company of CaliforniaInventor: Harry P. On, Jr.
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Patent number: 4457830Abstract: A process for catalytic hydroconversion of heavy petroleum feedstocks containing preasphaltenes to produce lower-boiling hydrocarbon liquid products. In the process, an inorganic acid is added to the reactor effluent residual fraction boiling above about 950.degree. F. to produce substantial precipitation of the preasphaltene materials. The clarified overhead fraction is recycled to the reaction zone, and the precipitated preasphaltene material is passed to further processing, such as coking to recover additional light oils. The reactor can advantageously be an upflow ebullated catalytic bed type and may use fine size catalyst for increased hydroconversion.Type: GrantFiled: December 28, 1981Date of Patent: July 3, 1984Assignee: HRI, Inc.Inventor: Paul H. Kydd
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Patent number: 4434046Abstract: Crude oil, when mildly dewaxed in the absence or presence of added hydrogen, separates into two phases with different pour points. A filtration step, which removes less than 5 percent of the product as solids, prevents this phase separation.Type: GrantFiled: April 30, 1981Date of Patent: February 28, 1984Assignee: Mobil Oil CorporationInventors: Costandi A. Audeh, David S. Shihabi
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Patent number: 4414097Abstract: This invention relates to an energy-efficient process for dewaxing hydrocrackate and manufacturing a stabilized and dewaxed hydrocracked lubricating oil stock from hydrocarbon feedstock boiling above about 343.degree. C.Type: GrantFiled: April 19, 1982Date of Patent: November 8, 1983Assignee: Mobil Oil CorporationInventors: Arthur W. Chester, William E. Garwood
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Patent number: 4411768Abstract: In a hydrogenation operation employing an ebullated catalytic bed, recycle is recovered from the hydrogenated product with at least 25%, by volume, of the recycle boiling above 950.degree. F. The recycle is cooled to a temperature of from 350.degree. to 600.degree. F. to separate coke precursors, prior to recycle to the hydrogenation. Higher conversion levels can be achieved by effecting recycle in such manner.Type: GrantFiled: April 21, 1982Date of Patent: October 25, 1983Assignee: The Lummus CompanyInventors: Harold Unger, Morgan C. Sze, Roger P. Van Driesen
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Patent number: 4405441Abstract: Distillates are prepared from asphaltenes-rich feeds by a process comprising subjecting the feed to catalytic hydroconversion, and subjecting the distillation residue of the hydroconverted product to a combination of solvent deasphalting and thermal cracking.Type: GrantFiled: September 30, 1982Date of Patent: September 20, 1983Assignee: Shell Oil CompanyInventors: Robert H. Van Dongen, John R. Newsome
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Patent number: 4400264Abstract: Distillates are prepared from asphaltenes-rich feeds by a process comprising subjecting the feed to thermal cracking, and subjecting the distillation residue of the cracked product to a combination of solvent deasphalting and catalytic hydroconversion.Type: GrantFiled: September 30, 1982Date of Patent: August 23, 1983Assignee: Shell Oil CompanyInventors: Pieter B. Kwant, John R. Newsome
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Patent number: 4343958Abstract: A process for the isomerization of acyclic hydrocarbons and alkylaromatic hydrocarbons is disclosed. The mixed-phase feed stream is heated and the liquid-phase portion of the feed stream is simultaneously vaporized by indirect heat exchange against the effluent of the reaction zone. Prior to this exchange, the effluent of the isomerization zone is heated in a fired heater to a temperature above that employed in the reaction zone. The inventive concept eliminates the need to pass mixed-phase feed streams through fired multi-pass heaters.Type: GrantFiled: April 28, 1981Date of Patent: August 10, 1982Assignee: UOP Inc.Inventor: Steve A. Gewartowski
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Patent number: 4297204Abstract: In a process for the thermal cracking of hydrocarbons to produce olefins, improvement of recovering hydrocarbons boiling above 200.degree. C. from the thermal cracking stage, preferably removing polymeric components therefrom, catalytically hydrogenating resultant hydrocarbons boiling above 200.degree. C., and recycling resultant hydrogenated hydrocarbons to the thermal cracking stage.Type: GrantFiled: February 21, 1979Date of Patent: October 27, 1981Assignee: Linde AktiengesellschaftInventors: Claus Schliebener, Hans J. Wernicke
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Patent number: 4283272Abstract: Hydrocracked, low pour lubricating oils of good stability are manufactured by passing a suitable hydrocarbon feed and hydrogen sequentially through a hydrocracking zone, a catalytic dewaxing zone, and a hydrotreating zone, all at high pressure and in that order, with purification of the hydrogen gas prior to passage to the dewaxing zone. By maintaining all zones at high pressure, the efficiency of the process is augmented.Type: GrantFiled: June 12, 1980Date of Patent: August 11, 1981Assignee: Mobil Oil CorporationInventors: William E. Garwood, Murray R. Silk
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Patent number: 4283271Abstract: Hydrocracked, low pour lubricating oils of good stability are manufactured by passing a suitable hydrocarbon feed sequentially through a hydrocracking zone, a catalytic dewaxing zone, and a hydrotreating zone, all at high pressure and in that order, and with separation of hydrocrackate from recycle hydrogen prior to dewaxing. Only clean makeup hydrogen is fed to the dewaxer, passed through the hydrotreater, and then on to the hydrocracker, thereby providing an exceptionally efficient process.Type: GrantFiled: June 12, 1980Date of Patent: August 11, 1981Assignee: Mobil Oil CorporationInventors: William E. Garwood, Murray R. Silk
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Patent number: 4276153Abstract: A process for the thermal cracking of hydrocarbons by feeding them into a line together with a fused salt, which comprises: feeding a fused salt mixed with steam into a reaction tube of a thermal cracking furnace of external heating type and further feeding raw hydrocarbons mixed with steam into said reaction tube to thermally crack the raw hydrocarbons; quenching the resulting fluid mixture of the cracking products, fused salt and steam in a quenching device, then dividing the fluid mixture into the fused salt and a gaseous substance, removing sludge and, if necessary, sulfur compounds from thus separated fused salt and recirculating the fused salt to the reaction tube and the quenching device; and dividing thus separated gaseous substance into an oil containing coke, tarry substances and fused salt mist and the intended cracking gas, and subjecting the oil to treatment with steam to convert the coke and tarry substance in the oil into water gas or to partial burning treatment with air or oxygen to divide thType: GrantFiled: December 31, 1979Date of Patent: June 30, 1981Assignees: Mitsui Engineering and Shipbuilding Co., Ltd., Mitsui Petrochemical Industries, Ltd.Inventors: Masami Yoshitake, Fumiaki Yamaguchi
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Patent number: 4261813Abstract: A method of denitrogenating an oil containing a relatively high concentration of nitrogenous compounds characterized by, first, extracting the nitrogenous compounds from the oil with an operable acid solvent to produce a raffinate of low nitrogen content oil and a bottoms of high nitrogen content oil; then recovering the acid solvent from the bottoms, simultaneously producing a small volumeteric flow rate stream of oil containing high content of nitrogenous compounds; depending upon the volumeteric rate of the high nitrogen content oil stream and upon demand, sending it to a hydrogen producing plant for supplying hydrogen for hydrogenation; and recycling the acid solvent. Preferred acid solvents comprise phosphoric acid, formic acid or the monoammonium salt of phosphoric acid. The recovery of the solvent may be by neutralization or by distillation.Type: GrantFiled: November 5, 1979Date of Patent: April 14, 1981Assignee: Atlantic Richfield CompanyInventor: Robert H. Smith
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Patent number: 4222852Abstract: Coronene deposits are removed from a heat exchange zone of the reforming process by recycling a portion of the normally liquid reformate to the heat exchange zone to dissolve the coronene deposits.Type: GrantFiled: February 2, 1979Date of Patent: September 16, 1980Assignee: Exxon Research & Engineering Co.Inventors: Walter S. Kmak, Akira Yatabe
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Patent number: 4214976Abstract: Coronene deposits are removed from a heat exchange zone disposed in two parallel trains of heat exchangers in a reforming process by reducing the flow of reforming zone effluent in one of the trains of heat exchangers sufficiently to effect condensation of a portion of the reforming zone effluent in said one train of heat exchangers where the coronene is deposited while simultaneously increasing the flow of reforming zone effluent in the second train of heat exchangers. Control means are provided in each of the heat exchange trains.Type: GrantFiled: February 2, 1979Date of Patent: July 29, 1980Assignee: Exxon Research & Engineering Co.Inventor: Walter S. Kmak
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Patent number: 4203825Abstract: Coronene deposits are removed from a heat exchange zone of a reforming process by operating the reforming zone at conditions such that at least a portion of the reformer effluent condenses in the heat exchange zone where the coronene deposit occurs.Type: GrantFiled: February 2, 1979Date of Patent: May 20, 1980Assignee: Exxon Research & Engineering Co.Inventors: Walter S. Kmak, Charles Monzo
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Patent number: 4201659Abstract: A process is disclosed for the conversion of asphaltines-containing mineral hydrocarbon oil to distillate gas oil by a processing sequence comprising thermal cracking, flashing, atmospheric fractionation, vacuum fractionation, thermal cracking, catalytic cracking or hydrocracking, and atmospheric fractionation with certain recycle of intermediate streams to achieve efficient, economic operations.Type: GrantFiled: May 29, 1979Date of Patent: May 6, 1980Assignee: Shell Oil CompanyInventors: Pieter B. Kwant, Dirk Kanbier, Petrus W. H. L. Tjan, Mohammed Akbar
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Patent number: 4200519Abstract: A process for the preparation of gas oil from residual oils by combination of two stages of thermal cracking, cyclone separation, vacuum distillation, deasphalting, atmospheric distillation, and recycling of certain streams.Type: GrantFiled: May 29, 1979Date of Patent: April 29, 1980Assignee: Shell Oil CompanyInventors: Pieter B. Kwant, Dirk Kanbier, Petrus W. H. L. Tjan, Mohammed Akbar
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Patent number: 4191799Abstract: Free-radical graft polymerization of an unsaturated monomer like acrylic acid, methacrylic acid and so forth on mineral oils such as rubber processing and/or extending oils provides a "grafted oil" which can be used to extend polymers such as carboxylated SBR latices with substantial retention of their original adhesive properties. These graft modified oils, also, can be used as seeds or emulsifiers, when emulsified, in emulsion polymerization. These grafted oils can be used as plasticizers for plastics and dry rubbers.Type: GrantFiled: November 4, 1977Date of Patent: March 4, 1980Assignee: The General Tire & Rubber CompanyInventor: David P. Gruber
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Patent number: 4190520Abstract: Problems associated with heating the mixed-phase feed stream of a hydrocarbon conversion process are reduced by a method of operation which includes heating the feed stream to a sufficient temperature for passage into a reaction zone by indirect heat exchange. The effluent stream of the reaction zone is then further heated in a fired heater and is passed through the indirect heat exchange zone in which the feed stream was heated.Type: GrantFiled: January 3, 1978Date of Patent: February 26, 1980Assignee: UOP Inc.Inventor: Steve A. Gewartowski
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Patent number: 4159936Abstract: Refining of crude petroleum by fractionally distilling the crude into lighter cuts and distillate bottoms constituting more than 50% of the crude. Hydrogenating the distillate bottoms at a temperature above 700.degree. C. in a tubular reactor to produce saturated hydrocarbons, some gas and a solid carbonaceous material. Separating the solid material in a cyclone and returning the hydrogenated oil to the fractionating column. Passing the solid carbonaceous material by an extruder to a second tubular reactor in contact with a mixture at a temperature above 750.degree. C. of steam, 1 and 2 carbon atom gases, and combustion products containing O.sub.2 from a third cyclone. Discharging the reaction products containing unreacted carbonaceous material together with substantially no O.sub.2, production of H.sub.2 and increased amounts of CO and CO.sub.2 into a second cyclone. Separating the gaseous products from the solid, recovering H.sub.2 and passing it to the first reactor tube.Type: GrantFiled: September 28, 1977Date of Patent: July 3, 1979Assignee: Kraftwerk Union AktiengesellschaftInventors: Rainer Dorn, Christian Koch, Kurt Reiter, Konrad Kunstle
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Patent number: 4147617Abstract: The fluid catalytic cracking of a residual oil fraction comprising metal contaminants and/or asphaltene type coke formers is processed by injecting the oil into the upper portion of a riser cracking operation under conditions to effect partial conversion thereof over a catalyst inactivated by carbonaceous deposits. A 650.degree.0 F. plus product of the low severity cracking is passed in contact with freshly regenerated catalyst under conditions of high conversion severity in the lower portion of the riser.Type: GrantFiled: April 6, 1978Date of Patent: April 3, 1979Assignee: Mobil Oil CorporationInventor: Donald M. Nace
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Patent number: 4124486Abstract: A mixture of a hydrocarbon-selective solvent -- e.g. isobutane -- and deasphalted oil is separated in a two-stage hot-separator system at progressively higher temperatures and substantially the same pressure. Resulting vaporous phases are subjected to a cold-flash separation at a lower pressure and a considerably lower temperature. The initial hot separation, in the two-stage system, is effected at a temperature from about 1.0.degree. F. to about 25.degree. F. above the critical temperature of the solvent; the second is conducted at a temperature about 30.degree. F. to about 130.degree. F. above that in the initial hot-separation. This technique is especially advantageous when integrated into a catalytic slurry process for the conversion of metal- and asphaltene-containing hydrocarbonaceous black oils.Type: GrantFiled: September 14, 1977Date of Patent: November 7, 1978Assignee: UOP Inc.Inventor: John P. Nolley, Jr.
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Patent number: 4098675Abstract: Deposition of ammonium chloride from a gaseous stream as it is passed through a compression means is prevented by recycling to the compression suction a sufficient amount of the compression means discharge that has been heated by the compression operation to maintain the temperature of the gaseous stream above the deposition temperature for ammonium chloride at operating pressure. The invention is particularly useful in hydrocarbon hydrogen treating processes in which hydrogen recycle streams containing ammonium chloride or ammonium chloride-forming constituents must be recompressed before recycle to the hydrogen treating process.Type: GrantFiled: July 7, 1977Date of Patent: July 4, 1978Assignee: Phillips Petroleum CompanyInventor: Max D. Pope
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Patent number: 4040943Abstract: A combination thermal cracker and coker for making specialty coke which permits high combined feed ratios necessary for total conversion to normally gaseous hydrocarbons, gasoline and coke without overloading the coke chamber with vapors. The process permits the use of smaller diameter coke chambers and/or lower pressure coke chambers.Type: GrantFiled: June 30, 1976Date of Patent: August 9, 1977Assignee: UOP Inc.Inventor: Frank Stolfa
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Patent number: 4041091Abstract: A fractionation scheme applicable to a transalkylation process in which an admixture of toluene and C.sub.9 alkylbenzene is converted to benzene and C.sub.8 alkylbenzene is disclosed. Transalkylation zone effluent containing C.sub.6 to C.sub.10 + alkylbenzene is passed into a fractionation zone wherein an admixture of benzene and toluene is withdrawn as a lower boiling fraction, and C.sub.8 + alkylbenzenes are withdrawn in admixture as a higher boiling fraction. The benzene and toluene fraction is introduced into a fractionator and separated therein. The C.sub.8 + fraction is fractionated into xylenes and C.sub.9 +. The C.sub.9 + fraction is fractionated into a C.sub.9 /C.sub.10 overhead fraction and C.sub.10 + bottoms fraction. Toluene and C.sub.9 /C.sub.10 are then fed to the transalkylation zone. Significant savings in utilities are realized by using a xylene vapor fraction to reboil the column fractionating transalkylation zone effluent, and by using the C.sub.9 /C.sub.Type: GrantFiled: February 19, 1976Date of Patent: August 9, 1977Assignee: UOP Inc.Inventor: Michel Jacques Henry
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Patent number: 3963794Abstract: Benzene yields from hydrodealkylation of alkylaromatics are improved by adding diphenyl to the feed hydrocarbon stream.Type: GrantFiled: December 7, 1965Date of Patent: June 15, 1976Inventors: John W. Myers, William C. Lanning
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Patent number: RE32265Abstract: .[.In a hydrogenation operation employing an ebullated catalytic bed, recycle is recovered from the hydrogenated product with at least 25%, by volume, of the recycle boiling above 950.degree. F. The recycle is cooled to a temperature of from 350.degree. to 600.degree. F. to separate coke precursors, prior to recycle to the hydrogenation. Higher conversion levels can be achieved by effecting recycle in such manner..]..Iadd.Disclosed is a hydrogenation process using at least one fluidized catalytic stage and a recycle material of heavy hydrogenated effluent. The heavy effluent material is cooled to a temperature within 350.degree.-600.degree. F. to separate toluene and heptane insoluble coke precursors prior to recycle. This separation may be enhanced by the use of centrifugation, filtration or a bed of particulate material (e.g. calcined coke). .Iaddend.Type: GrantFiled: May 17, 1985Date of Patent: October 14, 1986Assignee: Lummus Crest, Inc.Inventors: Harold Unger, Morgan C. Sze, Roger P. Van Dreisen