With Preliminary Treatment Of Feed Patents (Class 208/85)
-
Patent number: 5676711Abstract: An improved process for producing a low-sulfur fuel oil or gas from used oil and finely divided coal. After mixing, the coal/oil slurry is heated within a pressure vessel to a temperature of approximately 850.degree. F. and the pressure increased to approximately 1500 psi for a time period of more than one hour. A gaseous low-sulfur diesel fuel can be recovered from near the top of the pressure vessel.Type: GrantFiled: February 21, 1996Date of Patent: October 14, 1997Inventors: Joseph K. Kuzara, Larry D. Klinger
-
Patent number: 5660717Abstract: Hydrolyzable cations contained in crude oil are removed from crude oil by treatment of the crude oil with an aqueous solution containing 100 to 5000 ppm of a water soluble anionic polymer containing at least 20 mole percent mer groups from the group consisting of acrylic acid, methacrylic acid, sulfomethylated polyacrylamide, aminomethanephosphonic acid modified acrylic acid and their water soluble alkali metal and ammonium salts. By removing the hydrolyzable cations, corrosion occurring on metal surfaces in contact with the treated oil during subsequent refining is reduced.Type: GrantFiled: March 27, 1995Date of Patent: August 26, 1997Assignee: Nalco/Exxon Energy Chemicals, L. P.Inventor: Paul M. Lindemuth
-
Patent number: 5658455Abstract: An improved fluidized bed coking process wherein a residuum feedstock is introduced into a first stage comprised of a short vapor contact time reactor containing a horizontal moving bed of fluidized hot particles. Carbonaceous material is deposited onto the hot particles on contact with the hot particles, and a vapor product is produced. The hot particles, containing the carbonaceous deposits, are fed to a second stage fluidized bed coking process.Type: GrantFiled: July 17, 1995Date of Patent: August 19, 1997Assignee: Exxon Research & Engineering CompanyInventors: David G. Hammond, Mitchell Jacobson, John F. Pagel, Martin C. Poole, Robert C. Green, Willibald Serrand
-
Patent number: 5431812Abstract: A feedstock composition comprising residuum fractions and deasphalter bottoms is formulated by use of a carbon residue characterization factor. It has been found in the feedstock composition that the character of carbon residue is determinative of the coke quality. The process is used to make coke having a sulfur concentration of 0.5 to 0.9 of the feedstock composition sulfur.Type: GrantFiled: March 7, 1994Date of Patent: July 11, 1995Assignee: Texaco Inc.Inventor: Ooriapadical C. Abraham
-
Patent number: 5384037Abstract: A process for the production of a distillable hydrocarbon product stream from a first distillate hydrocarbon stream, a second distillate hydrocarbon stream and a waste lubricant stream by means of contacting the waste lubricant stream with a hot hydrogen-rich gaseous stream to increase the temperature of this feed stream and vaporize at least portion of the distillable hydrocarbonaceous compounds thereby producing a distillable hydrocarbonaceous stream which is immediately hydrogenated in an integrated hydrogenation zone. The vaporized waste oil stream is admixed with a first distillate hydrocarbon stream before introduction into the hydrogenation zone. The second distillate hydrocarbon stream is converted in a hydrocracking conversion zone in order to produce lower boiling distillable hydrocarbon products and an aqueous ammonia solution which is admixed with a partially condensed effluent from the hydrogenation zone in order to neutralize at least one acid gas.Type: GrantFiled: June 29, 1993Date of Patent: January 24, 1995Assignee: UOPInventor: Tom N. Kalnes
-
Patent number: 5370787Abstract: Thermal treatment of heavy petroleum resid in the presence of moderate amounts of light aromatics or paraffins produces more liquid product at the expense of gas and coke than when treated alone under identical conditions.Type: GrantFiled: April 30, 1993Date of Patent: December 6, 1994Assignee: Mobil Oil CorporationInventor: Thomas R. Forbus, Jr.
-
Patent number: 5318695Abstract: A fluid catalytic cracking process for producing relatively low emissions fuels. The feedstock is exceptionally low in nitrogen and aromatics and relatively high in hydrogen. The catalyst is an amorphous silica-alumina or a zeolitic material having a relatively small unit cell size. The feedstock can be characterized as having less than about 50 wppm nitrogen; greater than about 13 wt. % hydrogen; less than about 7.5 wt. % 2+ring aromatic cores; and not more than about 15 wt. % aromatic cores overall.Type: GrantFiled: November 30, 1992Date of Patent: June 7, 1994Assignee: Exxon Research and Engineering CompanyInventors: Paul E. Eberly, William E. Winter, William L. Schuette, William A. Wachter, Tan-Jen Chen
-
Patent number: 5314612Abstract: Disclosed is a fluid catalytic cracking process for producing low emissions fuels. The feedstock is exceptionally low in nitrogen and aromatics and relatively high in hydrogen. The catalyst is a mixture of zeolite Y and zeolite beta (.beta.). The feedstock can be characterized as having less than about 50 wppm nitrogen; greater than about 13 wt. % hydrogen; less than about 7.5 wt. % 2+ ring aromatic cores; and not more than about 15 wt. % aromatic cores overall.Type: GrantFiled: November 30, 1992Date of Patent: May 24, 1994Assignee: Exxon Research and Engineering CompanyInventors: Paul E. Eberly, William E. Winter
-
Patent number: 5288390Abstract: A process for the processing or upgrading of heavy oil fractions containing polynuclear aromatics is disclosed. The process comprises selectively oxidizing a feedstock under low severity conditions in a multi-phase system, wherein one phase is an aqueous and contains water-soluble catalyst, deoxygenating that product followed by hydroprocessing to yield a substantially mononuclear product.Type: GrantFiled: March 30, 1992Date of Patent: February 22, 1994Assignee: Sun Company, Inc. (R&M)Inventor: Vincent A. Durante
-
Patent number: 5198098Abstract: 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 properties, is added so it progressively accumulates on aged catalyst, and enhances magnetic separation of aged catalyst, to increase activity and improve selectivity of remaining catalyst which is recycled. Manganese acts as a "magnetic hook" to separate more magnetic, older, less catalytically active and less selective, higher-metals-containing catalyst particulates from less-magnetically-active, lower-metal-containing, more catalytically active and selective catalysts fractions, which are then recycled back to the unit.Type: GrantFiled: October 19, 1990Date of Patent: March 30, 1993Assignee: Ashland Oil, Inc.Inventor: William P. Hettinger
-
Patent number: 5176816Abstract: An integrated process for the production of a hydrogenated distillable hydrocarbonaceous product from a temperature-sensitive hydrocarbonaceous stream containing a non-distillable component by the utilization of a hot hydrogen flash zone and a secondary separation zone to achieve a high yield of hydrogenated distillable hydrocarbonaceous product.Type: GrantFiled: April 2, 1992Date of Patent: January 5, 1993Assignee: UOPInventors: Steven P. Lankton, Robert B. James, Jr.
-
Patent number: 5110444Abstract: Middle distillate petroleum streams are hydrotreated to produce a low sulfur and low aromatic product in a process employing three reaction zones in series. Hydrogen flows between the reaction zones countercurrent to the hydrocarbons. Hydrogen sulfide is removed from effluent of the first two reaction zones by hydrogen stripping. The second and third reaction zones employ a sulfur-sensitive noble metal hydrogenation catalyst. Operating pressure increases and temperature decreases from the first to third reaction zones.Type: GrantFiled: August 3, 1990Date of Patent: May 5, 1992
-
Patent number: 5080777Abstract: For upgrading heavy slurry oil containing catalyst fines from a catalytic cracking operation, the viscosity of the slurry oil is lowered in a hydrovisbreaking process step. In a preferred embodiment an admixture of the fines containing slurry oil and a metal containing resid oil fraction, resulting from a crude distillation, is passed through the hydrovisbreaker. The hydrovisbreaker effluent is separated into higher and lower boiling fractions with the lower boiling fraction preferably passed through a cracking unit so as to covert the lower boiling fraction to lower molecular weight hydrocarbon products.Type: GrantFiled: April 30, 1990Date of Patent: January 14, 1992Assignee: Phillips Petroleum CompanyInventors: Paul A. Aegerter, Jr., Jerald A. Howell, Edward L. Sughrue, II, Kelly G. Knopp
-
Patent number: 5051163Abstract: A process is disclosed for reducing the impact of basic compounds, such as nitrogen, on hydrocarbonaceous feed intended for catalytic cracking. In a preferred embodiment, a portion of the regenerated catalyst of a catalytic cracking process is separated and contacted with the hydrocarbonaceous feed at a temperature and for a time sufficient to strongly bind the basic contaminants in the feed with the separated portion of the acid catalyst. The feed is then passed to the catalytic cracking reactor in a slurry with the separated catalyst, resulting in a desirable conversion increase.Type: GrantFiled: January 11, 1990Date of Patent: September 24, 1991Assignee: Chevron Research CompanyInventors: Russell R. Krug, Jarold A. Meyer
-
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
-
Patent number: 5013424Abstract: A process for the production of hydrogenated, distillable hydrocarbonaceous product from a feed comprising hydrocarbonaceous compounds and having a non-distillable component, and a feed comprising halogenated organic compounds by means of contacting the feed comprising hydrocarbonaceous compounds and having a non-distillable component with a hot hydrogen-rich gaseous stream to increase the temperature of this feed stream to vaporize at least a portion of the distillable hydrocarbonaceous compounds thereby producing a distillable hydrocarbonaceous product which is immediately hydrogenated in an integrated hydrogenation zone. The feed comprising halogenated organic compounds is contacted in a second hydrogenated hydrocarbonaceous product and at least one water-soluble inorganic halide compound.Type: GrantFiled: July 30, 1990Date of Patent: May 7, 1991Assignee: UOPInventors: Robert B. James, Jr., Tom N. Kalnes, Steven P. Lankton
-
Patent number: 5009767Abstract: Petroleum refinery waste stream sludges are recycled by segregating the sludges according to their oil content. Sludges of high oil content are developed and then injected into a delayed coking unit during the coking phase so that they are converted to coke and liquid coking products. High water content sludges are used to quench the coke during the quench phase of the coking cycle, with minimal increases in coke volatile matter. The process increases the capacity of the delayed coking unit to process and recycle refinery waste sludges and produce a coke of lower volatile content.Type: GrantFiled: September 21, 1989Date of Patent: April 23, 1991Assignee: Mobil Oil CorporationInventors: Mark P. Bartilucci, Grant G. Karsner, William J. Tracy, III
-
Patent number: 4985133Abstract: A fluidized catalytic cracking process using a riser reactor to crack a mixture of high and low nitrogen content fresh feeds is operated to reduce NO.sub.x emissions in the regenerator flue gas. Segregation of the feed into high and low nitrogen content streams, and addition of the high nitrogen content feed to the base of the riser, followed by separate addition of the low nitrogen content feed higher up in the riser, reduces NO.sub.x emissions and reduces production of low value products from the FCC unit.Type: GrantFiled: February 12, 1990Date of Patent: January 15, 1991Assignee: Mobil Oil CorporationInventor: Ajit V. Sapre
-
Patent number: 4960503Abstract: A process for the fluidized catalytic cracking of an FCC feedstock uses a backmix catalyst cooler to heat FCC feed and control tube wall temperatures to avoid coking and thermal cracking. Heated FCC feed contacts the catalyst in a reactor riser to convert the feedstock. Prior heating of the feed raises its temperature so that it is more easily vaporized and better distributed throughout the riser. Using FCC catalyst to heat the feed maintains the heat balance between the reactor and the regenerator so that the catalyst circulation to the riser can remain unchanged. The backmix type cooler has heat exchange tubes located in a separate vessel. Catalyst from the dense bed of a regeneration zone is circulated to a section of the cooler located above the heat exchange tubes. One form of the invention uses two conduits to transfer catalyst to the section of the cooler above the exchange tubes and thereby control the temperature of the catalyst above the heat exchange tubes.Type: GrantFiled: November 21, 1988Date of Patent: October 2, 1990Assignee: UOPInventors: Edward C. Haun, Steven S. Milner, David A. Lomas
-
Patent number: 4960502Abstract: Process and apparatus for catalytic conversion of oils. A furnace heats a feedstock which is provided to a separator for separation of the feedstock into a gas vapor phase and a liquid phase. The liquid phase is provided under pressure to a venturi nozzle which atomizes the liquid oil. The atomized oil and the gas are each provided to a reactor such as the lower end of a riser reactor in a fluid catalytic cracking unit.Type: GrantFiled: May 22, 1989Date of Patent: October 2, 1990Assignee: Phillips Petroleum CompanyInventor: Floyd H. Holland
-
Patent number: 4960505Abstract: Process for the hydrogenation of hydrocarbon oils by contacting a hydrocarbon oil containing hydrogenatable components and having a boiling range between 130.degree. C. and 520.degree. C. with hydrogen under conditions causing substantial hydrogenation using a catalyst comprising one or more Group VIII noble metal(s) on a support wherein the support comprises a modified Y-type zeolite having a unit cell size between 24.20 and 2430 .ANG. and a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 25 and recovering a product containing at least a fraction having a boiling point range between the 90%w boiling point of the feedstock and the final boiling point of the feedstock and which fraction contains on a weight basis at least 50% of the material present in the boiling point range between the 90%w boiling point of the feedstock and the final boiling point of the feedstock.Type: GrantFiled: August 12, 1988Date of Patent: October 2, 1990Assignee: Shell Oil CompanyInventors: Johannes K. Minderhoud, Jacques Lucien
-
Patent number: 4952302Abstract: A vapor/liquid separator and liquid distributor which is especially suitable for small catalytic hydrodewaxing reactors is disclosed. A mixed phase stream is discharged into a V/L separator above a vessel. A liquid level is maintained in the V/L separator using a liquid level controller. Preferably the liquid is filtered, then passed through a spray nozzle for distribution over a fixed bed of contact material in the vessel, e.g., catalyst. The vapor phase from the V/L separator is added to the top of the reactor. The process and apparatus is especially useful in catalytic hydrodewaxing.Type: GrantFiled: September 27, 1988Date of Patent: August 28, 1990Assignee: Mobil Oil CorporationInventor: Lyle A. Leach
-
Patent number: 4923590Abstract: A process for treating a temperature-sensitive hydrocarbonaceous stream containing a non-distillable component to produce a hydrogenated distillable hydrocarbonaceous product and a heavy product comprising the non-distillable component while minimizing thermal degradation of the hydrocarbonaceous stream which process comprises the steps of: (a) contacting the hydrocarbonaceous stream with a first hydrogen-rich gaseous stream having a temperature greater than the hydrocarbonaceous stream in a flash zone at flash conditions thereby increasing the temperature of the hydrocarbonaceous stream with minimal thermal degradation and vaporizing at least a portion thereof to provide a hydrocarbonaceous vapor stream comprising hydrogen and a heavy product comprising the non-distillable component; (b) contacting the hydrocarbonaceous vapor stream comprising hydrogen recovered from step (a) without intermediate separation with a hydrogenation catalyst in a hydrogenation reaction zone at hydrogenation conditions to increaseType: GrantFiled: January 27, 1989Date of Patent: May 8, 1990Assignee: UOPInventors: Tom N. Kalnes, Robert B. James, Jr.
-
Patent number: 4917788Abstract: This invention provides a method for extending the catalytic dewaxing cycle time of a refined waxy lube stock. The method, in its broadest aspect, requires the additional refining step of thermally treating the refined waxy stock or precursor thereof for about 0.1 to about 2.0 hours at elevated temperature and at a pressure of 0 to 3000 psig (pounds per square inch gauge), and recovering an upgraded waxy stock having a reduced content of trace compounds that contain metals, nitrogen, sulfur and oxygen.In a specific embodiment of this invention, a vacuum residuum is thermally treated at a temperature of about 700.degree. F. to 950.degree. F. prior to solvent deasphalting and solvent extraction, and the waxy bright stock so formed is catalytically dewaxed with extended cycle time.Type: GrantFiled: November 10, 1988Date of Patent: April 17, 1990Assignee: Mobil Oil CorporationInventors: Lillian A. Rankel, Darrell D. Whitehurst
-
Patent number: 4908121Abstract: When steam cracking hydrocarbons to lower olefins in a tubular fired furnace having a convection section for preheating hydrocarbon feed, feedstock flexibility to process light feeds is provided by cooling mixed feed of steam and hydrocarbon followed by reheating to the desired mixed feed temperature.Type: GrantFiled: May 12, 1986Date of Patent: March 13, 1990Assignee: The M. W. Kellogg CompanyInventors: Larry G. Hackemesser, Bradley L. Lankford
-
Patent number: 4894141Abstract: A process for upgrading topped crude oils and residual portions comprising material boiling above 552.degree. C. (1025.degree. F.) by the combination of partial demetallizing and decarbonizing of the residual oil before effecting zeolite catalytic cracking thereof is described in conjunction with a product separation process, a combined hydrocarbon gas product concentration section and the use of parallel arranged CO boilers to produce sulfur free flue gas and steam. Steam generated by the combination operation effectively reduces the energy requirement of the combustion process.Type: GrantFiled: January 3, 1984Date of Patent: January 16, 1990Assignee: Ashland Oil, Inc.Inventors: Lloyd E. Busch, Paul W. Walters, Oliver Zandona
-
Patent number: 4882037Abstract: A process for treating a temperature-sensitive hydrocarbonaceous stream containing a non-distillable component and a distillable, hydrogenatable hydrocarbonaceous fraction to produce a selected hydrogenated distillable light hydrocarbonaceous product, a distillable heavy hydrocarbonaceous liquid product and a heavy product comprising the non-distillable component while minimizing thermal degradation of the temperature-sensitive hydrocarbonaceous stream which process comprises the steps of: (a) contacting the temperature-sensitive hydrocarbonaceous stream with a hot first hydrogen-rich gaseous stream having a temperature greater than the hydrocarbonaceous stream in a flash zone at flash conditions thereby increasing the temperature of the hydrocarbonaceous stream and vaporizing at least a portion thereof to provide a first hydrocarbonaceous vapor stream comprising hydrogen and a first heavy product stream comprising the non-distillable component; (b) condensing at least a protion of the first hydrocarbonaceousType: GrantFiled: August 15, 1988Date of Patent: November 21, 1989Assignee: UOPInventors: Tom N. Kalnes, Robert B. James, Jr.
-
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
-
Patent number: 4814065Abstract: Disclosed is a method for accelerating the exchange of hydrogen between a hydrogen donor and a petroleum resid to be subjected to cracking, visbreaking, or coking. Acceleration is effected by incorporating an aqueous solution of ammoniun sulfide into the mixture of donor and resid and subjecting the mixture to a period of heat-soaking at an elevated temperature.Type: GrantFiled: September 25, 1987Date of Patent: March 21, 1989Assignee: Mobil Oil CompanyInventor: Lillian A. Rankel
-
Patent number: 4802971Abstract: A catalytic cracking process is disclosed which comprises:(a) thermally and/or catalytically cracking a hydrogen-rich hydrocarbon feed in the lower region of a riser reactor in the presence of a catalyst composition comprising a first catalyst component, and, optionally, a second catalyst component, said first catalyst component being an amorphous cracking catalyst and/or large pore crystalline cracking catalyst, said second catalyst component being a shape selective medium pore crystalline silicate zeolite catalyst, to provide a gasiform material contributing hydrogen species and/or carbon-hydrogen fragments; and,(b) catalytically cracking a thermally treated heavy hydrocarbon feed in a higher region of the riser in the presence of said catalyst composition and gasiform material to provide gasoline boiling range material in increased yield and/or of higher quality.Type: GrantFiled: January 14, 1988Date of Patent: February 7, 1989Assignee: Mobil Oil CorporationInventors: Joseph A. Herbst, Hartley Owen, Paul H. Schipper
-
Patent number: 4786401Abstract: Hydrocarbon-containing liquid waste sludges from refinery waste streams can be disposed of by blending with the feedstock being passed to a fluid catalytic cracking unit. Preferably, the sludge is premixed with a hydrocarbon, such as a light oil, prior to mixing with the feed.Type: GrantFiled: September 25, 1987Date of Patent: November 22, 1988Assignee: Mobil Oil CorporationInventors: Solomon M. Jacob, Grant G. Karsner, William J. Tracy, III
-
Patent number: 4767521Abstract: Prior to upgrading a viscous feed by visbreaking, at least a portion of the feed is treated to remove a heavy phase in specified amounts, whereby the severity of the visbreaking may be increased. The Shell Hot Filtration number of the visbreaking product is reduced by at least 75%, compared to visbreaking of untreated feed at some severity.Type: GrantFiled: December 18, 1986Date of Patent: August 30, 1988Assignee: Lummus Crest, Inc.Inventors: Robert J. Feldman, James M. Chen, Andrei Rhoe, Roger P. Van Driesen, C. Bertil Fogman, Donald P. Satchell
-
Patent number: 4749470Abstract: A fluid catalytic cracking (FCC) process and apparatus which exposes a residuum to microwave energy to activate the residuum prior to feeding to a fluid catalytic cracking riser. The process and apparatus also cracks a portion of a light hydrocarbon stream to produce reactive free radical and olefinic compounds by contacting the light hydrocarbon stream with a fluid catalytic cracking stream in the riser. The catalyst and activated light hydrocarbon stream then combines with the microwave-activated residuum in the riser. The present invention may be employed in a multiple riser system or in a single riser system. The present invention minimizes coke production by quickly and uniformly heating residuum in the microwave heater prior to passing into the riser.Type: GrantFiled: September 3, 1986Date of Patent: June 7, 1988Assignee: Mobil Oil CorporationInventors: Joseph A. Herbst, Hartley Owen, Paul H. Schipper
-
Patent number: 4719002Abstract: A slurry hydroconversion process is provided in which a catalyst precursor concentrate comprising an aqueous solution of phosphomolybdic acid and a heavy oil is contacted with hot hydrogen to vaporize the water from the concentrate. The resulting catalyst precursor concentrate is introduced into a hydrocarbonaceous chargestock and the resulting mixture is heated in the presence of added hydrogen to convert the phosphomolybdic acid to a solid molybdenum-containing catalyst. The resulting slurry is subjected to hydroconversion conditions.Type: GrantFiled: April 21, 1986Date of Patent: January 12, 1988Assignee: Exxon Research and Engineering CompanyInventors: Francis X. Mayer, William E. Lewis
-
Patent number: 4619758Abstract: An improved method for fluidized catalytic cracking of a selected portion of a paraffinic hydrocarbon feedstock in which a paraffinic chargestock for a fluid catalytic cracking unit is processed for the separation of at least a part of its paraffinic components from non-paraffins by means of a zeolite composition which acts both as a molecular sieve and a cracking catalyst. The paraffins-containing fraction adsorbed on the molecular sieve is subjected to catalytic cracking in a riser-type fluid catalytic cracking reaction zone at a temperature in the range of 650.degree. to 700.degree. C. under subatmospheric pressure conditions for the production of light olefins.Type: GrantFiled: April 24, 1984Date of Patent: October 28, 1986Assignee: Texaco, Inc.Inventors: Roy E. Pratt, Scott M. Sayles, Kerry W. Bowers, Richard P. Scott, deceased
-
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
-
Patent number: 4547285Abstract: A catalytic hydrotreating process of a low sulfur-containing hydrocarbon oil involves the addition of sulfur to maintain the catalyst in a sulfided form.Type: GrantFiled: October 24, 1983Date of Patent: October 15, 1985Assignee: Union Oil Company of CaliforniaInventor: Robert E. Miller
-
Patent number: 4530755Abstract: A coking process is provided in which a stream of heavy oil product, which typically is recycled to the coking zone, is first subjected to solvent separation using coker naphtha as solvent to separate the heavy oil into a high Conradson carbon content product comprising a minor portion of the coker naphtha and a lower Conradson carbon content product comprising a major portion of the coker naphtha and, thereafter, recovering the lower Conradson carbon content product and recycling the high Conradson content product, including the minor portion of coker naphtha, to the coking zone.Type: GrantFiled: October 31, 1983Date of Patent: July 23, 1985Assignee: Exxon Research and Engineering Co.Inventors: Joseph M. Ritchie, Bong H. Chang, John Sosnowski
-
Patent number: 4528088Abstract: A coking process is provided in which a stream of heavy oil product, which typically is recycled to the coking zone, is first subjected to solvent separation using coker naphtha as solvent to separate the heavy oil into a high Conradson carbon content product comprising a minor portion of the coker naphtha and a lower Conradson carbon content product comprising a major portion of the coker naphtha and, thereafter, recycling the high Conradson content product, including the minor portion of coker naphtha, to the coking zone, and separating the lower Conradson carbon content product in the coker product fractionator.Type: GrantFiled: November 30, 1983Date of Patent: July 9, 1985Assignee: Exxon Research and Engineering Co.Inventors: Bong H. Chang, Joseph M. Ritchie
-
Patent number: 4512878Abstract: Used oils, especially used lubricating oils which are normally considered waste and are discarded or burned, are reclaimed for reuse by a re-refining procedure involving the steps of:(a) heat soaking the used oil;(b) distilling the heat soaked oil;(c) passing the distillate through a guard bed of activated material;(d) hydrotreating the guard bed treated distillate under standard hydrotreating conditions.If the used oil to be re-refined contains a quantity of water and/or fuel fraction which the practioner considers sufficiently large to be detrimental, the used oil may be subjected to a dewatering/defueling step prior to being heat soaked.Type: GrantFiled: February 16, 1983Date of Patent: April 23, 1985Assignee: Exxon Research and Engineering Co.Inventors: Lloyd E. Reid, Keith C. Yao, Douglas G. Ryan
-
Patent number: 4443325Abstract: A combined process for treating heavy hydrocarbon feedstocks, such as resids that minimizes coke production and maximizes naphtha production, comprising the steps of thermally treating the feedstocks, in the absence of an added catalyst and either with or without hydrogen and steam, at a temperature of at least about 750.degree. F. (399.degree. C.) and under a pressure greater than about 400 psig to create significant chemical transformations without causing phase separation and consequent formation of sludge or a coke deposit; topping the thermally treated product to produce a distillate fraction and a bottoms fraction; coking the bottom fraction to produce gas, liquid products, and coke; and finally catalytically cracking the combined distillate fraction and liquid products to recover gas, gasoline, and light distillate products.Type: GrantFiled: December 23, 1982Date of Patent: April 17, 1984Assignee: Mobil Oil CorporationInventors: Nai Y. Chen, Lillian A. Rankel
-
Patent number: 4432863Abstract: A process is disclosed for economically converting carbo-metallic oils to liquid fuel products by bringing a converter feed containing 650.degree. F.+ material characterized by a carbon residue on pyrolysis of at least about 1 and by containing at least about 4 ppm of Nickel Equivalents of heavy metals, including nickel, into contact with a particulate cracking catalyst in a progressive flow type reactor having an elongated conversion zone. The suspension of catalyst and feed in the reactor has a vapor residence time in the range of about 0.5 to about 10 seconds, a temperature of about 900.degree. F. to about 1400.degree. F. and a pressure of about 10 to about 50 pounds per square inch absolute for causing a conversion per pass in the range of about 50 to about 90 percent while depositing nickel on the catalyst and coke on the catalyst in amounts in the range of about 0.3 to about 3 percent by weight.Type: GrantFiled: July 20, 1981Date of Patent: February 21, 1984Assignee: Ashland Oil, Inc.Inventors: George D. Myers, deceased, William P. Hettinger, Jr., Stephen M. Kovach, Oliver J. Zandona
-
Patent number: 4388176Abstract: A process for conversion of paraffinic base petroleum cracking stocks to high octane motor fuels and petrochemical feedstocks in which paraffinic components are separated from the cracking stock to yield a deparaffined fraction which is hydrotreated and catalytically cracked and a paraffin fraction which is separately catalytically cracked whereby improved yields of normally gaseous olefins and normally liquid products including high octane motor fuel components are obtained.Type: GrantFiled: November 19, 1981Date of Patent: June 14, 1983Assignee: Texaco Inc.Inventors: Roy E. Pratt, Scott M. Sayles, Kerry W. Bowers, Richard P. Scott, deceased
-
Patent number: 4332670Abstract: The fractionation and stripping equipment of a middle distillate catalytic dewaxing unit may be eliminated by integrating the catalytic dewaxing unit with a catalytic cracking unit. The light cycle oil sidestream from the cat cracker fractionator, bypasses the sidestream stripper and serves as the feed to the catalytic dewaxing unit. The dewaxed product is separated into a gasoline fraction which is recycled for fractionation in the cat cracker fractionator and a fuel oil fraction which is recycled to the cat cracker sidestream stripper for removal of light materials to produce a low pour fuel oil meeting product specifications.Type: GrantFiled: January 14, 1981Date of Patent: June 1, 1982Assignee: Mobil Oil CorporationInventor: Michael J. Antal
-
Patent number: 4323448Abstract: A process for mechanochemically activating treatment of crude oil from petroleum and of hydrocarbon mixtures like crude oil but of different, e.g. synthetic origins, is characterized in that the crude oil or similar, if need be after separation of the usual additional water, salts, insoluble impurities, washable acids or compounds with acid reactions, and expulsion of dissolved gaseous components, is treated in a pinned-disk or cage mill known as a "disintegrator" such that every single droplet of oil is exposed on a statistical average to 3 to 12 beats during a period of 0.001 to 0.01 seconds. Improved properties are thus imparted to the products, affecting both processing and the use of the processed products.Type: GrantFiled: March 18, 1980Date of Patent: April 6, 1982Assignee: Simmering-Graz-Pauker Aktiengesellschaft fur Maschinen-, Kessel-und WaggonbauInventor: Karl Entzmann
-
Patent number: 4167472Abstract: A process for treating a hydrocarbon composition containing both straight chain and non-straight chain hydrocarbons in which said hydrocarbon composition is separated into a straight chain hydrocarbon-rich fraction and a non-straight chain hydrocarbon-rich fraction, non-aromatics in said non-straight chain hydrocarbon-rich fraction are converted to aromatics, and at least a portion of the straight chain hydrocarbon-rich fraction is passed in combination with steam over a steam active catalyst comprising at least one Group VIII metal and a tin modified Group II metal aluminate under conditions such that aromatics are produced.Type: GrantFiled: April 26, 1978Date of Patent: September 11, 1979Assignee: Phillips Petroleum Co.Inventors: James E. Dick, Fred T. Sherk, Lewis E. Drehman
-
Patent number: 4042487Abstract: In the thermal cracking of a heavy petroleum oil (having an API specific gravity of not more than 25) in a tubular type heating furnace, possible occurrence of coking trouble inside the furnace can be prevented by applying a magnetic field of fixed magnitude transversely to the flow of the heavy petroleum oil being introduced into the furnace or by applying a fixed magnitude of magnetic field transversely and, at the same time, applying a fixed magnitude of direct-current voltage parallel to the flow of the heavy petroleum oil being introduced into the furnace. More effective prevention of occurrence of coking can be obtained by having a specific inorganic substance incorporated in the heavy petroleum oil before the oil is subjected to the magnetic field or to simultaneous application of the magnetic field and voltage.Type: GrantFiled: May 6, 1976Date of Patent: August 16, 1977Assignee: Kureha Kagako Kogyo Kabushiki KaishaInventors: Koji Seguchi, Minoru Sugita, Kazuyoshi Inada, Kiyoshi Tagaya, Yuji Nakamura
-
Patent number: 4009094Abstract: Pyrolysis naphtha is contacted with a residuum hydrocarbon charge stock under process conditions suitable for delayed coking of said residuum hydrocarbon charge. Unstable olefinic and diolefinic components of said pyrolysis naphtha are reduced in the product naphtha. Such conversion of unstable olefin and diolefin components is accomplished without substantial conversion of aromatic components of said pyrolysis naphtha.Type: GrantFiled: January 9, 1975Date of Patent: February 22, 1977Assignee: Texaco Inc.Inventors: Edward L. Cole, John T. Nolan, Jr.