Chemical Treatment (refining Or Modification Except Mere Solvent Extraction) Patents (Class 208/27)
  • Patent number: 6962651
    Abstract: 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: Grant
    Filed: March 10, 2003
    Date of Patent: November 8, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, John M. Rosenbaum
  • Patent number: 6951605
    Abstract: 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: Grant
    Filed: October 3, 2003
    Date of Patent: October 4, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ian A. Cody, William J. Murphy
  • Patent number: 6949181
    Abstract: 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: Grant
    Filed: October 21, 2003
    Date of Patent: September 27, 2005
    Assignee: Shell Oil Company
    Inventors: Thomas Joris Remans, Ingrid Maria Van Vegchel
  • Patent number: 6930219
    Abstract: 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: Grant
    Filed: December 6, 2002
    Date of Patent: August 16, 2005
    Assignee: ABB Lummus Global Inc.
    Inventors: Zhiping Shan, Jacobus Cornelius Jansen, Chuen Y. Yeh, Philip J. Angevine, Thomas Maschmeyer, Mohamed S. Hamdy
  • Patent number: 6860987
    Abstract: 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: Grant
    Filed: April 15, 2003
    Date of Patent: March 1, 2005
    Assignee: Akzo Nobel N.V.
    Inventors: Frans Lodewijk Plantenga, Sonja Eijsbouts, Marinus Bruce Cerfontain
  • Patent number: 6860909
    Abstract: 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: Grant
    Filed: June 13, 2003
    Date of Patent: March 1, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Paul Joseph Berlowitz, Robert Jay Wittenbrink, Bruce Randall Cook
  • Publication number: 20040256286
    Abstract: 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: Application
    Filed: June 19, 2003
    Publication date: December 23, 2004
    Inventors: Stephen J. Miller, Dennis J. O'Rear, John M. Rosenbaum, Jerome F. Mayer, Christopher A. Simmons
  • Publication number: 20040256287
    Abstract: 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: Application
    Filed: June 19, 2003
    Publication date: December 23, 2004
    Inventors: Stephen J. Miller, Dennis J. O'Rear, John M. Rosenbaum, Jerome F. Mayer, Christopher A. Simmons
  • Patent number: 6827842
    Abstract: 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: Grant
    Filed: October 19, 2001
    Date of Patent: December 7, 2004
    Assignee: ExxonMobil Research & Engrg. Co.
    Inventors: Brent England Beasley, Randall Stephen Lachine
  • Patent number: 6827843
    Abstract: 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: Grant
    Filed: December 26, 2002
    Date of Patent: December 7, 2004
    Assignee: Chevron U.S.A., Inc.
    Inventor: Saleh Elomari
  • Publication number: 20040232048
    Abstract: 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: Application
    Filed: March 24, 2004
    Publication date: November 25, 2004
    Inventors: Eric Benazzi, Emmanuelle Guillon, Johan Martens
  • Patent number: 6822126
    Abstract: 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: Grant
    Filed: April 18, 2002
    Date of Patent: November 23, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Publication number: 20040206666
    Abstract: 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: Application
    Filed: March 10, 2004
    Publication date: October 21, 2004
    Inventor: Nicholas James Adams
  • Patent number: 6787023
    Abstract: 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: Grant
    Filed: May 20, 2000
    Date of Patent: September 7, 2004
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
  • Patent number: 6774272
    Abstract: 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: Grant
    Filed: April 18, 2002
    Date of Patent: August 10, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Patent number: 6773578
    Abstract: 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: Grant
    Filed: December 5, 2000
    Date of Patent: August 10, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, Joseph A. Biscardi
  • Publication number: 20040144691
    Abstract: 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: Application
    Filed: December 5, 2003
    Publication date: July 29, 2004
    Inventors: Gerard Benard, Eric Duprey, Johannes Anthonius Robert Van Veen
  • Publication number: 20040134834
    Abstract: 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: Application
    Filed: January 8, 2004
    Publication date: July 15, 2004
    Inventors: Eric Benazzi, Nathalie Marchal-George, Tivadar Cseri, Pierre Marion, Christophe Gueret, Slavik Kasztelan
  • Publication number: 20040129604
    Abstract: 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: Application
    Filed: August 29, 2003
    Publication date: July 8, 2004
    Inventors: William Berlin Genetti, Zhaozhong Jiang, Daniel Francis Ryan, Adeana Richelle Bishop, Loren Leon Ansell, Jack Wayne Johnson, Nancy Marie Page
  • Patent number: 6759438
    Abstract: 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: Grant
    Filed: January 15, 2002
    Date of Patent: July 6, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: Andrew Rainis, D J O'Rear
  • Publication number: 20040124123
    Abstract: 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: Application
    Filed: December 26, 2002
    Publication date: July 1, 2004
    Inventor: Saleh Elomari
  • Publication number: 20040112792
    Abstract: 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: Application
    Filed: October 14, 2003
    Publication date: June 17, 2004
    Inventors: William J. Murphy, Ian A. Cody, Bernard G. Silbernagel
  • Publication number: 20040108250
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: William J. Murphy, Ian A. Cody, Jacob B. Angelo, Zhaozhong Jiang, Jeffrey C. Trewella
  • Publication number: 20040108245
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Zhaozhong Jiang, Randall D. Partridge
  • Publication number: 20040108249
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jeenok T. Kim
  • Publication number: 20040108246
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy, Sylvain S. Hantzer
  • Publication number: 20040108248
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy
  • Publication number: 20040108247
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer
  • Publication number: 20040108244
    Abstract: 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: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer
  • Patent number: 6733658
    Abstract: 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: Grant
    Filed: June 24, 1998
    Date of Patent: May 11, 2004
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Nathalie George-Marchal, Christophe Gueret, Patrick Briot, Alain Billon, Pierre Marion
  • Patent number: 6723889
    Abstract: 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: Grant
    Filed: January 22, 2001
    Date of Patent: April 20, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, Arthur John Dahlberg, Kamala R. Krishna, Russell R. Krug
  • Publication number: 20040072676
    Abstract: 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: Application
    Filed: August 29, 2003
    Publication date: April 15, 2004
    Inventors: Adeana Richelle Bishop, William Berlin Genetti, Jack Wayne Johnson, Loren Leon Ansell, Nancy Marie Page
  • Publication number: 20040065585
    Abstract: 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: Application
    Filed: November 17, 2003
    Publication date: April 8, 2004
    Inventors: Eric Benazzi, Nathalie Marchal-George, Tivadar Cseri, Pierre Marion, Christhope Gueret
  • Publication number: 20040065583
    Abstract: 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: Application
    Filed: October 8, 2002
    Publication date: April 8, 2004
    Inventor: Zhaozhong Jiang
  • Publication number: 20040065581
    Abstract: 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: Application
    Filed: October 8, 2002
    Publication date: April 8, 2004
    Inventors: Zhaozhong Jiang, Terry Eugene Helton, Randall David Partridge, Larry E. Hoglen
  • Publication number: 20040065586
    Abstract: 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: Application
    Filed: August 29, 2003
    Publication date: April 8, 2004
    Inventor: Jhaozhong Jiang
  • Publication number: 20040065584
    Abstract: 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: Application
    Filed: October 8, 2002
    Publication date: April 8, 2004
    Inventors: Adeana Richelle Bishop, William Berlin Genetti, Nancy Marie Page, Loren Leon Ansell, Jack Wayne Johnson
  • Publication number: 20040065582
    Abstract: 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: Application
    Filed: October 8, 2002
    Publication date: April 8, 2004
    Inventors: William Berlin Genetti, Zhaozhong Jiang, Daniel Francis Ryan, Adeana Richelle Bishop, Loren Leon Ansell, Jack Wayne Johnson, Nancy Marie Page
  • Publication number: 20040055931
    Abstract: 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 m
    Type: Application
    Filed: June 18, 2003
    Publication date: March 25, 2004
    Inventors: Johannes Van Beijnum, Arjen Peter Geukema, Kevin John Anthony Polder
  • Patent number: 6702937
    Abstract: 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: Grant
    Filed: February 8, 2002
    Date of Patent: March 9, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: David R. Johnson, Christopher A. Simmons, Donald H. Mohr, Stephen J. Miller, Stephen K. Lee
  • Patent number: 6699385
    Abstract: 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: Grant
    Filed: October 17, 2001
    Date of Patent: March 2, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Patent number: 6695965
    Abstract: 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: Grant
    Filed: April 4, 2000
    Date of Patent: February 24, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Daniel Francis Ryan
  • Publication number: 20040020828
    Abstract: The present invention relates to a new crystalline zeolite SSZ-53 prepared by using phenylcycloalkylmethyl ammonium cations as structure directing agents.
    Type: Application
    Filed: July 10, 2003
    Publication date: February 5, 2004
    Applicant: Chevron U.S.A. Inc.
    Inventor: Saleh Elomari
  • Patent number: 6676827
    Abstract: 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: Grant
    Filed: January 15, 2003
    Date of Patent: January 13, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
  • Publication number: 20040004020
    Abstract: 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: Application
    Filed: May 2, 2003
    Publication date: January 8, 2004
    Inventors: Michael T. Grove, Randall D. Partridge, Terry E. Helton, David A. Pappal, Philip J. Angevine, Dominick N. Mazzone
  • Publication number: 20040000505
    Abstract: The present invention relates to the use of crystalline zeolite SSZ-54 as a catalyst in a process for dewaxing hydrocarbon feedstocks.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventor: Richard N. Reynolds
  • Patent number: 6663768
    Abstract: 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: Grant
    Filed: June 30, 1998
    Date of Patent: December 16, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Publication number: 20030226785
    Abstract: 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: Application
    Filed: January 15, 2003
    Publication date: December 11, 2003
    Inventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
  • Patent number: 6652735
    Abstract: 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: Grant
    Filed: April 26, 2001
    Date of Patent: November 25, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Thomas F. Degnan, Philip J. Angevine
  • Publication number: 20030199718
    Abstract: 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: Application
    Filed: April 18, 2002
    Publication date: October 23, 2003
    Inventor: Stephen J. Miller