Chemical Treatment (refining Or Modification Except Mere Solvent Extraction) Patents (Class 208/27)
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Patent number: 6962651Abstract: A method for producing lubricant base oils is provided comprising the steps of: (a) hydroisomerizing a feedstock over a medium pore size molecular sieve catalyst under hydroisomerization conditions to produce an isomerized product having a pour point of greater than a target pour point of the lubricant base oils; (b) separating the isomerized product into at least a light lubricant base oil having a pour point less than or equal to the target pour point of the lubricant base oils and a heavy fraction having a pour point of equal to or greater than the target pour point of the lubricant base oils and a cloud point greater than the target cloud point of the lubricant base oils; and (c) dehazing the heavy fraction to provide a heavy lubricant base oil having a pour point less than or equal to the target pour point of the lubricant base oils and a cloud point less than or equal to the target cloud point of the lubricant base oils.Type: GrantFiled: March 10, 2003Date of Patent: November 8, 2005Assignee: Chevron U.S.A. Inc.Inventors: Stephen J. Miller, John M. Rosenbaum
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Patent number: 6951605Abstract: A method to produce high quality lube oil products involving hydrotreating a waxy feed to produce a hydrotreated feed and subsequently hydrodewaxing the hydrotreated feed and hydrofinishing the hydrodewaxed feed.Type: GrantFiled: October 3, 2003Date of Patent: October 4, 2005Assignee: ExxonMobil Research and Engineering CompanyInventors: Ian A. Cody, William J. Murphy
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Patent number: 6949181Abstract: Method for impregnating a Group VIII metal on a molecular sieve—binder extrudate wherein the binder comprises a low acidity refractory oxide binder material, which is essentially free of alumina, by a) contacting the molecular sieve—binder extrudate with an aqueous solution of a corresponding Group VIII metal nitrate salt having a pH of below 8, wherein the molar ratio between the Group VIII metal cations in the solution and the number of sorption sites present in the extrudate is equal to or larger than 1, and b) drying the molecular sieve—binder extrudate obtained from step a).Type: GrantFiled: October 21, 2003Date of Patent: September 27, 2005Assignee: Shell Oil CompanyInventors: Thomas Joris Remans, Ingrid Maria Van Vegchel
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Patent number: 6930219Abstract: A process for treating organic compounds includes providing a composition which includes a substantially mesoporous structure of silica containing at least 97% by volume of pores having a pore size ranging from about 15 ? to about 30 ? and having a micropore volume of at least about 0.01 cc/g, wherein the mesoporous structure has incorporated therewith at least about 0.02% by weight of at least one catalytically and/or chemically active heteroatom selected from the group consisting of Al, Ti, V, Cr, Zn, Fe, Sn, Mo, Ga, Ni, Co, In, Zr, Mn, Cu, Mg, Pd, Pt and W, and the catalyst has an X-ray diffraction pattern with one peak at 0.3° to about 3.5° at 2?. The catalyst is contacted with an organic feed under reaction conditions wherein the treating process is selected from alkylation, acylation, oligomerization, selective oxidation, hydrotreating, isomerization, demetalation, catalytic dewaxing, hydroxylation, hydrogenation, ammoximation, isomerization, dehydrogenation, cracking and adsorption.Type: GrantFiled: December 6, 2002Date of Patent: August 16, 2005Assignee: ABB Lummus Global Inc.Inventors: Zhiping Shan, Jacobus Cornelius Jansen, Chuen Y. Yeh, Philip J. Angevine, Thomas Maschmeyer, Mohamed S. Hamdy
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Patent number: 6860987Abstract: The present invention pertains to a process for the hydroprocessing of hydrocarbon feedstocks wherein said hydrocarbon feedstocks are contacted, at hydroprocessing conditions, with a catalyst composition comprising at least one Group VIII non-noble metal component and at least two Group VIB metal components. The catalyst composition further comprises at least about 0.01 mole of an organic oxygen-containing additive per mole of the total of Group VIB metals and Group VIII non-noble metals present in the catalyst composition. The total of the Group VIII and Group VIB metal components, calculated as oxides, make up at least about 50 wt. % of the catalyst composition, calculated on dry weight.Type: GrantFiled: April 15, 2003Date of Patent: March 1, 2005Assignee: Akzo Nobel N.V.Inventors: Frans Lodewijk Plantenga, Sonja Eijsbouts, Marinus Bruce Cerfontain
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Patent number: 6860909Abstract: A blend useful as a diesel fuel, as well as a method for its production, comprising a high quality Fischer-Tropsch derived distillate boiling in the range of a diesel fuel blended with a cracked stock boiling in the range of a diesel fuel wherein the final blend contains 10-35 wt. % aromatics and 1-20 wt. % polyaromatics and produces low regulated emissions levels.Type: GrantFiled: June 13, 2003Date of Patent: March 1, 2005Assignee: ExxonMobil Research and Engineering CompanyInventors: Paul Joseph Berlowitz, Robert Jay Wittenbrink, Bruce Randall Cook
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Publication number: 20040256286Abstract: Waxy hydrocarbon feedstocks are contacted with a hydrocracking catalyst and the effluent then contacted with an intermediate pore size molecular sieve hydroisomerization catalyst. The effluent from the hydroisomerization is fractionated to provide a heavy fraction and a middle distillate fuel. A high quality lubricant base oil with a high viscosity index and a low pour point is isolated from the heavy fraction.Type: ApplicationFiled: June 19, 2003Publication date: December 23, 2004Inventors: Stephen J. Miller, Dennis J. O'Rear, John M. Rosenbaum, Jerome F. Mayer, Christopher A. Simmons
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Publication number: 20040256287Abstract: Waxy hydrocarbon feedstocks are contacted with a hydrocracking catalyst and the effluent then contacted with an intermediate pore size molecular sieve hydroisomerization catalyst. The effluent from the hydroisomerization is fractionated to provide a heavy fraction and a middle distillate fuel. At least a portion of the heavy fraction is dewaxed to provide a high quality lubricant base oil with a high viscosity index and a low pour point.Type: ApplicationFiled: June 19, 2003Publication date: December 23, 2004Inventors: Stephen J. Miller, Dennis J. O'Rear, John M. Rosenbaum, Jerome F. Mayer, Christopher A. Simmons
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Patent number: 6827842Abstract: A laser beam reflected by wax crystals is used in determining the wax crystallization temperature of a hot dewaxing solvent upstream of solvent chillers. This is automatically achieved by an on-line method from a remote control point, in which a slipstream of solvent is passed through an attached solvent loop into a sample chamber in the loop, without being exposed to ambient conditions. As the sample is cooled, the beam reflections are detected and indicate the wax to crystallization temperature. Corrective measures can then be taken to prevent fouling of the chillers, if need be.Type: GrantFiled: October 19, 2001Date of Patent: December 7, 2004Assignee: ExxonMobil Research & Engrg. Co.Inventors: Brent England Beasley, Randall Stephen Lachine
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Patent number: 6827843Abstract: The present invention relates to new crystalline molecular sieve SSZ-63 prepared using N-cyclodecyl-N-methyl-pyrrolidinium cation as a structure-directing agent, methods for synthesizing SSZ-63 and processes employing SSZ-63 in a catalyst.Type: GrantFiled: December 26, 2002Date of Patent: December 7, 2004Assignee: Chevron U.S.A., Inc.Inventor: Saleh Elomari
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Publication number: 20040232048Abstract: A catalyst comprising at least one ZBM-30 zeolite, synthesized in the presence of a particular structuring agent such as triethylenetetramine, at least one porous mineral matrix, at least one hydro-dehydrogenating element, preferably chosen from the elements of Group VIB and Group VIII of the periodic table, is used in order to improve the pour point of charges containing long (more than 10 carbon atoms) linear and/or slightly branched paraffins, in particular in order to convert, with a good yield, charges having high pour points to at least one cut having a low pour point and a high viscosity index for oil bases.Type: ApplicationFiled: March 24, 2004Publication date: November 25, 2004Inventors: Eric Benazzi, Emmanuelle Guillon, Johan Martens
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Patent number: 6822126Abstract: Provided is a continuous process for converting waste or virgin plastics into lube oils. The plastic feed is maintained in a heater at preferred temperatures of 150° C.-350° C. The feed is continuously passed to a pyrolysis reactor preferably maintained at a temperature of 450° C.-700° C. and at atmospheric pressure. Relatively short residence times are employed. Optionally, the reactor effluent is processed in a hydrotreating unit. The effluent is fed to an isomerization dewaxing unit and fractionated to recover lube oil stocks. Preferably, the feed to the pyrolysis reactor can be a blend of waste plastic and waxy Fischer-Tropsch fractions.Type: GrantFiled: April 18, 2002Date of Patent: November 23, 2004Assignee: Chevron U.S.A. Inc.Inventor: Stephen J. Miller
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Publication number: 20040206666Abstract: Process for preparing a lubricating base oil and a gas oil by contacting, under catalytic dewaxing conditions, a petroleum derived wax with a catalyst composition comprising at least a hydrogenation component, a binder and zeolite crystallites having pores consisting of 12 oxygen atoms, wherein the zeolite crystallites have a constrain index (CI) larger than 1 and wherein from the effluent of the process a base oil fraction and a gas oil fraction is isolated and wherein the gas oil yield is larger than the yield to the fraction boiling below the gas oil fraction.Type: ApplicationFiled: March 10, 2004Publication date: October 21, 2004Inventor: Nicholas James Adams
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Patent number: 6787023Abstract: There is provided a catalyst containing porous macrostructures comprised of: (a) a three-dimensional network of particles of porous inorganic material (e.g., zeolites); and, (b) at least one metal (e.g., a catalytically active metal). The particles of the at least one macrostructure occupy less than 75% of the total volume of the at least one macrostructure and are jointed together to form a three-dimensional interconnected network. The three-dimensional interconnected network will usually be comprised of pores having diameters greater than about 20 Å. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger (e.g., a polymer-based ion exchange resin) and a synthesis mixture (e.g., for zeolite formation) capable of forming the porous inorganic material and the at least one metal; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.Type: GrantFiled: May 20, 2000Date of Patent: September 7, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
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Patent number: 6774272Abstract: A process for converting a blend of plastic waste and a Fischer-Tropsch waxy fraction into high VI lube oils. A Fischer-Tropsch wax is separated into a 1000° F.+ fraction and a 1000° F.− fraction. The higher boiling fraction is combined with virgin or waste polyolefin and fed to a pyrolysis zone after being heated in a heating unit. The pyrolysis effluent is separated into at least a heavy fraction. Any light fraction recovered can be further processed into a feed for gasoline products. Any middle fraction recovered can be hydrotreated and isodewaxed to form diesel, diesel blending and jet fuel, or can be oligomerized, hydrotreated and isodewaxed to form high VI lubricating base oil. The heavy fraction is hydrotreated and isodewaxed to yield high VI lubricating base oil. The process can be conducted on a continuous basis.Type: GrantFiled: April 18, 2002Date of Patent: August 10, 2004Assignee: Chevron U.S.A. Inc.Inventor: Stephen J. Miller
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Patent number: 6773578Abstract: Lube base stocks and lube stock compositions, as well as a process for preparing lube base stocks and lube stock compositions, are disclosed. The lube oils preferably have a viscosity index above about 115. The process involves obtaining feedstocks that have a 95% point below 1150° F. and feedstocks that have 95% point above 1150° F. The feedstocks that have a 95% point below 1150° F. are catalytically dewaxed, and the feedstocks that have 95% point above 1150° F. are solvent dewaxed. The resulting products can optionally be blended, and the base stocks can be combined with various additives to form lube oil compositions. Hydrotreatment can optionally be performed on the lube base stocks to remove olefins, oxygenates and other impurities. In one embodiment, one or more of the fractions are obtained from Fischer-Tropsch synthesis.Type: GrantFiled: December 5, 2000Date of Patent: August 10, 2004Assignee: Chevron U.S.A. Inc.Inventors: Dennis J. O'Rear, Joseph A. Biscardi
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Publication number: 20040144691Abstract: A process to prepare a base oil starting from a slack wax containing feedstock by (a) contacting the feedstock in the presence of hydrogen with a sulphided hydrodesulphurisation catalyst having nickel and tungsten on an acid amorphous silica-alumina carrier and (b) performing a pour point reducing step on the effluent of step (a) to obtain the base oil.Type: ApplicationFiled: December 5, 2003Publication date: July 29, 2004Inventors: Gerard Benard, Eric Duprey, Johannes Anthonius Robert Van Veen
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Publication number: 20040134834Abstract: The invention concerns a method for simultaneously producing very high quality oil bases and high quality middle distillates comprising successive steps of hydroisomerization and catalytic dewaxing. The hydroisomerization is carried out in the presence of a catalyst containing at least a noble metal deposited on an amorphous acid support, the metal dispersion being less than 20%. The support is preferably an amorphous silica-alumina. The catalytic dewaxing is carried out in the presence of a catalyst containing at least a hydro-dehydrogenating element (group VIII) and at least a molecular sieve selected among ZBM-30, EU-2 and EU 11.Type: ApplicationFiled: January 8, 2004Publication date: July 15, 2004Inventors: Eric Benazzi, Nathalie Marchal-George, Tivadar Cseri, Pierre Marion, Christophe Gueret, Slavik Kasztelan
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Publication number: 20040129604Abstract: Catalytic dewaxing of paraffin containing feeds, preferably feeds produced from syn gas using a non-shifting Fischer-Tropsch catalyst, is accomplished at relatively low hydrogen partial pressures without substantial effect on the life of the dewaxing catalyst having a certain pore structure.Type: ApplicationFiled: August 29, 2003Publication date: July 8, 2004Inventors: William Berlin Genetti, Zhaozhong Jiang, Daniel Francis Ryan, Adeana Richelle Bishop, Loren Leon Ansell, Jack Wayne Johnson, Nancy Marie Page
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Patent number: 6759438Abstract: Methods for producing a substantially paraffinic Fischer-Tropsch product or a blended Fischer Tropsch product comprising a selected oxygenate concentration, and if required, a selected oxygenate concentration of specific individual oxygenates, are disclosed. The methods of the present invention measure oxygenate concentration using GC-AED. The oxygenate measurements obtained using the GC-AED may be used to adjust and control various processes used to produce, upgrade, or finish Fischer Tropsch products to provide Fischer Tropsch products with a selected oxygenate concentration, and if required, a selected oxygenate concentration of specific individual oxygenates.Type: GrantFiled: January 15, 2002Date of Patent: July 6, 2004Assignee: Chevron U.S.A. Inc.Inventors: Andrew Rainis, D J O'Rear
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Publication number: 20040124123Abstract: The present invention relates to new crystalline molecular sieve SSZ-63 prepared using N-cyclodecyl-N-methyl-pyrrolidinium cation as a structure-directing agent, methods for synthesizing SSZ-63 and processes employing SSZ-63 in a catalyst.Type: ApplicationFiled: December 26, 2002Publication date: July 1, 2004Inventor: Saleh Elomari
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Publication number: 20040112792Abstract: A method to produce high quality lube oil products involving hydrotreating a waxy feed to produce a hydrotreated feed and subsequently hydroisomerizing and hydrodewaxing the hydrotreated waxy feed.Type: ApplicationFiled: October 14, 2003Publication date: June 17, 2004Inventors: William J. Murphy, Ian A. Cody, Bernard G. Silbernagel
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Publication number: 20040108250Abstract: An integrated process is disclosed for dewaxing hydrocarbon feedstocks in a sour environment. The process includes hydrotreating, dewaxing, hydrofinishing or combination thereof wherein there is no disengagement between any of the process steps.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: William J. Murphy, Ian A. Cody, Jacob B. Angelo, Zhaozhong Jiang, Jeffrey C. Trewella
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Publication number: 20040108245Abstract: The present invention relates to a process for converting wax with a heavy component to high quality lube basestocks using a unidimensional intermediate pore molecular sieve with near circular pore structures having an average diameter of 0.50 nm to 0.65 nm wherein the difference between the maximum diameter and the minimum is ≦0.05 nm followed by a molecular sieve Zeolite Beta catalyst. Both catalysts comprise one or more Group VIII metals. For example, a cascaded two-bed catalyst system consisting of a first bed Pt/ZSM-48 catalyst followed by a second bed Pt/Beta catalyst improves processing of heavy lubes.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Zhaozhong Jiang, Randall D. Partridge
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Publication number: 20040108249Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jeenok T. Kim
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Publication number: 20040108246Abstract: A waxy hydrocarbon feed is catalytically dewaxed with a catalyst that has been selectively activated. The selective activation of the catalyst involves contacting the dewaxing catalyst with a feed mixture containing waxy hydrocarbon and at least one oxygenate. The process results in improved catalyst performance resulting in improved yield of isomerate at equivalent pour.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Ian A. Cody, William J. Murphy, Sylvain S. Hantzer
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Publication number: 20040108248Abstract: A method to produce high quality lube oil products involving hydrotreating a waxy feed to produce a hydrotreated feed and subsequently hydrodewaxing the hydrofinishing the waxy feed.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Ian A. Cody, William J. Murphy
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Publication number: 20040108247Abstract: A waxy hydrocarbon feed is catalytically treated with a dewaxing catalyst that has been selectively activated. The selective activation of the catalyst involves treating the catalyst with at least one oxygenate. The selectively activated catalyst can then be used to dewax waxy hydrocarbon to improve yield and product quality of the isomerate product.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer
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Publication number: 20040108244Abstract: A dewaxing catalyst is selectively activated by treatment with an oxygenate. Selective activation is accomplished by treated the dewaxing catalyst with a carrier feed containing oxygenate. The selectively activated dewaxing catalyst when used to dewax waxy hydrocarbons results in improved yield of isomerate at equivalent pour point over a dewaxing catalyst which has not been oxygenate treated.Type: ApplicationFiled: October 3, 2003Publication date: June 10, 2004Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer
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Patent number: 6733658Abstract: The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an EU-1 zeolite and at least one hydro-dehydrogenating element, at a temperature which is in the range 170° C. to 500° C., a pressure in the range 1 to 250 bar and an hourly space velocity in the range 0.05 to 100 h−1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The invention also concerns an EU-1 zeolite from which a portion of elements T (Al, Ga, Fe or B) have been removed and which has an Si/T atomic ratio of at least 10.Type: GrantFiled: June 24, 1998Date of Patent: May 11, 2004Assignee: Institut Francais du PetroleInventors: Eric Benazzi, Nathalie George-Marchal, Christophe Gueret, Patrick Briot, Alain Billon, Pierre Marion
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Patent number: 6723889Abstract: A process for producing a diesel fuel having at least 70% C10+ paraffins, wherein the iso-paraffin to normal paraffin mole ratio is 5:1 and higher. This diesel fuel is produced by from a feed containing at least 40% C10+ normal paraffins and at least 20% C26+ normal paraffins. It is produced by contacting that feed in an isomerization/cracking reaction zone a feed with a catalyst comprising a SAPO-11 and platinum in the presence of hydrogen (hydrogen:feed ratio of from 1,000 to 10,000 SCFB) at a temperature of from 340° C. to 420° C., a pressure of from 100 psig to 600 psig, and a liquid hourly space velocity of from 0.1 hr−1 to 1.0 hr−1.Type: GrantFiled: January 22, 2001Date of Patent: April 20, 2004Assignee: Chevron U.S.A. Inc.Inventors: Stephen J. Miller, Arthur John Dahlberg, Kamala R. Krishna, Russell R. Krug
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Publication number: 20040072676Abstract: Fischer-Tropsch hydrocarbon synthesis using a noncobalt catalyst is used to produce waxy fuel and lubricant oil hydrocarbons from synthesis gas derived from natural gas. The waxy hydrocarbons are hydrodewaxed, with reduced conversion to lower boiling hydrocarbons, by contacting the waxy hydrocarbons, in the presence of hydrogen, with an unsulfided hydrodewaxing catalyst that has been reduced and then treated by contacting it with a stream containing one or more oxygenates.Type: ApplicationFiled: August 29, 2003Publication date: April 15, 2004Inventors: Adeana Richelle Bishop, William Berlin Genetti, Jack Wayne Johnson, Loren Leon Ansell, Nancy Marie Page
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Publication number: 20040065585Abstract: The invention concerns an improved process for producing very high quality base stock and for simultaneously producing high quality middle distillates, comprising successive hydroisomerisation and catalytic dewaxing steps.Type: ApplicationFiled: November 17, 2003Publication date: April 8, 2004Inventors: Eric Benazzi, Nathalie Marchal-George, Tivadar Cseri, Pierre Marion, Christhope Gueret
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Publication number: 20040065583Abstract: Catalytic dewaxing of paraffin containing feeds with a catalyst having a certain pore structure, the feeds preferably produced from syn gas using a non-shifting Fischer-Tropsch catalyst, is accomplished in the substantial absence of added hydrogen, and a cyclic isomerization-catalyst regeneration process is provided.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Inventor: Zhaozhong Jiang
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Publication number: 20040065581Abstract: The present invention relates to a process for converting Fischer-Tropsch wax to high quality lube basestocks using a molecular sieve Beta catalyst followed by a unidimensional intermediate pore molecular sieve with near circular pore structures having an average diameter of 0.50 nm to 0.65 nm wherein the difference between the maximum diameter and the minimum is ≦0.05 nm. Both catalysts comprise one or more Group VIII metals. For example, a cascaded two-bed catalyst system consisting of a first bed Pt/Beta catalyst followed by a second bed Pt/ZSM-48 catalyst is highly selective for wax isomerization and lube hydrodewaxing with minimal gas formation.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Inventors: Zhaozhong Jiang, Terry Eugene Helton, Randall David Partridge, Larry E. Hoglen
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Publication number: 20040065586Abstract: Catalytic dewaxing of paraffin containing feeds with a catalyst having a certain pore structure, where the feeds are preferably produced from syn gas using a non-shifting Fischer-Tropsch catalyst, is accomplished in the substantial absence of added hydrogen, and a cyclic isomerization-catalyst regeneration process is provided.Type: ApplicationFiled: August 29, 2003Publication date: April 8, 2004Inventor: Jhaozhong Jiang
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Publication number: 20040065584Abstract: A heavy lubricant base stock is made by (a) producing a synthesis gas from natural gas, (b) reacting the H2 and CO in the gas in the presence of a cobalt Fischer-Tropsch catalyst, at reaction conditions effective to synthesize waxy hydrocarbons boiling in the heavy lubricant oil range, which are hydrodewaxed it at least two stages, with interstage separation and removal of the lighter material.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Inventors: Adeana Richelle Bishop, William Berlin Genetti, Nancy Marie Page, Loren Leon Ansell, Jack Wayne Johnson
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Publication number: 20040065582Abstract: Catalytic dewaxing of paraffin containing feeds, preferably feeds produced from a non-shifting Fischer-Tropsch catalyst, is accomplished at relatively low hydrogen partial pressures without substantial affect on the life of a catalyst having a certain pore structure.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Inventors: William Berlin Genetti, Zhaozhong Jiang, Daniel Francis Ryan, Adeana Richelle Bishop, Loren Leon Ansell, Jack Wayne Johnson, Nancy Marie Page
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Publication number: 20040055931Abstract: Process to prepare a spindle oil, light machine oil and a medium machine oil base oil grade by (a) performing a separate catalytic dewaxing on a spindle oil fraction, a light machine oil fraction and a medium machine oil fraction as obtained in a vacuum distillation of a bottoms fraction of a fuels hydrocracking process; (b) performing a separate hydrofinishing of the light and medium machine oil fractions obtained in step (a); (c) separating the low boiling compounds from the spindle oil, light machine oil and medium machine oil fractions as obtained in step (a) and (b) and obtaining the spindle oil, light machine oil and medium machine oil base oil grade; (e) wherein the vacuum distillation is performed by alternatingly performing the distillation in two modes wherein the first mode (d1) the bottoms fraction is separated into a gas oil fraction, a spindle oil fraction, a medium machine oil fraction and a first rest fraction boiling between said spindle oil and medium machine oil fraction and in the second mType: ApplicationFiled: June 18, 2003Publication date: March 25, 2004Inventors: Johannes Van Beijnum, Arjen Peter Geukema, Kevin John Anthony Polder
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Patent number: 6702937Abstract: A process for producing low pour point diesel and lubricating base oil products by bulk dewaxing a C5 plus Fischer-Tropsch syncrude, hydrofinishing the dewaxed intermediate, and recovering 120 degrees C. plus products having improved properties.Type: GrantFiled: February 8, 2002Date of Patent: March 9, 2004Assignee: Chevron U.S.A. Inc.Inventors: David R. Johnson, Christopher A. Simmons, Donald H. Mohr, Stephen J. Miller, Stephen K. Lee
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Patent number: 6699385Abstract: The present invention discloses a process for producing a low haze heavy base oil including the steps of: (a) providing a heavy waxy feed stream having an initial boiling point greater than 900° F. and having a paraffin content of at least 80%; (b) separating the heavy feed stream into a heavy fraction and a light fraction by a deep cut distillation; and (c) hydroisomerizing the light fraction to produce a low haze heavy base oil.Type: GrantFiled: October 17, 2001Date of Patent: March 2, 2004Assignee: Chevron U.S.A. Inc.Inventor: Stephen J. Miller
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Patent number: 6695965Abstract: A wax blending process is disclosed which retains the desirable properties of a Fischer-Tropsch wax, while adjusting the hardness of the wax to within to a desired range. The invention utilizes a synergistic effect between hard virgin Fischer-Tropsch wax and softer mildly isomerized Fischer-Tropsch wax in a blending process which allows the artisan to adjust the hardness of a wax product to within desired ranges. The process involves passing a Fischer-Tropsch wax over a hydroisomerization catalyst under predetermined conditions including relatively mild temperatures such that chemical conversions (e.g., hydrogenation and mild isomerization) take place while less than 10% boiling point conversion (hydrocracking) occurs, thus preserving overall isomerized wax yield.Type: GrantFiled: April 4, 2000Date of Patent: February 24, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Robert J. Wittenbrink, Daniel Francis Ryan
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Publication number: 20040020828Abstract: The present invention relates to a new crystalline zeolite SSZ-53 prepared by using phenylcycloalkylmethyl ammonium cations as structure directing agents.Type: ApplicationFiled: July 10, 2003Publication date: February 5, 2004Applicant: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Patent number: 6676827Abstract: A method for producing a lube basestock from a waxy feed is disclosed in which a feed containing to 50 wt % or more of wax is hydrotreated and stripped to lower the nitrogen and sulfur content of the feed. The feed is then hydroisomerized under conditions to 370° C. hydrocatalytically dewaxed with a catalyst comprising a mixture of a catalytically active metal on a zeolite dewaxing catalyst and an amorphous catalyst, or alternatively is solvent dewaxed and then hydrocatalytically dewaxed with the just described catalyst.Type: GrantFiled: January 15, 2003Date of Patent: January 13, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
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Publication number: 20040004020Abstract: A process for upgrading a hydrocarbon feedstock containing waxy components and having an end boiling point exceeding 650° F., which includes contacting the feedstock at superatmospheric hydrogen partial pressure with an isomerization dewaxing catalyst that includes ZSM-48 and contacting the feedstock with a hydrocracking catalyst to produce an upgraded product with a reduced wax content. Each catalyst is present in an amount sufficient to reduce the cloud point and the pour point of the feedstock at a conversion of greater than about 10%, and an overall distillate yield of greater than about 10% results from the process.Type: ApplicationFiled: May 2, 2003Publication date: January 8, 2004Inventors: Michael T. Grove, Randall D. Partridge, Terry E. Helton, David A. Pappal, Philip J. Angevine, Dominick N. Mazzone
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Publication number: 20040000505Abstract: The present invention relates to the use of crystalline zeolite SSZ-54 as a catalyst in a process for dewaxing hydrocarbon feedstocks.Type: ApplicationFiled: June 28, 2002Publication date: January 1, 2004Inventor: Richard N. Reynolds
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Patent number: 6663768Abstract: An integrated process for preparing a lubricating oil base stock includes an isomerization step followed by a solvent dewaxing step. A waxy feed is isomerized to an intermediate pore point, which is at least 6° C. above a target pour point, over a select molecular sieve having specified pore properties. The isomerized oil is then solvent dewaxed to a very low pour point. This process produces a dewaxed lubricating oil base stock which has an exceptionally high viscosity index.Type: GrantFiled: June 30, 1998Date of Patent: December 16, 2003Assignee: Chevron U.S.A. Inc.Inventor: Stephen J. Miller
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Publication number: 20030226785Abstract: A method for producing a lube basestock from a waxy feed is disclosed in which a feed containing to 50 wt % or more of wax is hydrotreated and stripped to lower the nitrogen and sulfur content of the feed. The feed is then hydroisomerized under conditions to 370° C. hydrocatalytically dewaxed with a catalyst comprising a mixture of a catalytically active metal on a zeolite dewaxing catalyst and an amorphous catalyst, or alternatively is solvent dewaxed and then hydrocatalytically dewaxed with the just described catalyst.Type: ApplicationFiled: January 15, 2003Publication date: December 11, 2003Inventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
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Patent number: 6652735Abstract: A process for isomerization dewaxing of a hydrocarbon feed which includes contacting the hydrocarbon feed with a large pore size, small crystal size, crystalline molecular sieve and an intermediate pore size, small crystal size, crystalline molecular sieve to produce a dewaxed product with a reduced pour point and a reduced cloud point. In a preferred embodiment, the feed is contacted with the molecular sieves sequentially, first with the large pore sieve followed by the intermediate pore sieve.Type: GrantFiled: April 26, 2001Date of Patent: November 25, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Thomas F. Degnan, Philip J. Angevine
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Publication number: 20030199718Abstract: Provided is a continuous process for converting waste or virgin plastics into lube oils. The plastic feed is maintained in a heater at preferred temperatures of 150° C.-350° C. The feed is continuously passed to a pyrolysis reactor preferably maintained at a temperature of 450° C.-700° C. and at atmospheric pressure. Relatively short residence times are employed. Optionally, the reactor effluent is processed in a hydrotreating unit. The effluent is fed to an isomerization dewaxing unit and fractionated to recover lube oil stocks. Preferably, the feed to the pyrolysis reactor can be a blend of waste plastic and waxy Fischer-Tropsch fractions.Type: ApplicationFiled: April 18, 2002Publication date: October 23, 2003Inventor: Stephen J. Miller