Abstract: A synthetic lubricant base stock is provided having a kinematic viscosity at 100° C. of from 5 to about 300 cS and a VI greater than 100. The base stock comprises random co-oligomers of an alpha olefin or mixtures thereof and an olefinic substituted aromatic compound which co-oligomers are prepared in the presence of a Friedel-Crafts catalyst.
Type:
Grant
Filed:
September 10, 2002
Date of Patent:
March 29, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Margaret May-Som Wu, Steven Edward Donnachie, James Thomas Carey, Walter David Vann, Norman Yang, Dilip Surana
Abstract: Emulsion compositions for starting a reformer of a fuel cell system comprises hyrdocarbon fuel, water and alkoxylated alkyl ester and alcohol surfactants.
Type:
Grant
Filed:
December 20, 2002
Date of Patent:
March 22, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Ramesh Varadaraj, Paul Joseph Berlowitz
Abstract: A method to quantify the conjugated dienes in a feedstream including the steps of dissolving 4-methyl-1,2,4-trazoline-3,5-dione (MTAD) in said feedstream, and determining the molar concentration of said conjugated dienes and/or the carbon number distribution of said conjugated dienes by GC/MS and GC/NCD (Nitrogen Chemiluminescence Detection).
Type:
Grant
Filed:
June 10, 2003
Date of Patent:
March 22, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Kuangnan Qian, Kathleen E. Edwards, Frank C. Wang, Michael Siskin
Abstract: A two stage hydrodesulfurizing process for producing low sulfur distillates. A distillate boiling range feedstock containing in excess of about 3,000 wppm sulfur is hydrodesulfurized in a first hydrodesulfurizing stage containing one or more reaction zones in the presence of hydrogen and a hydrodesulfurizing catalyst. The liquid product stream thereof is passed to a first separation stage wherein a vapor phase product stream and a liquid product stream are produced. The liquid product stream, which has a substantially lower sulfur and nitrogen content than the original feedstream is passed to a second hydrodesulfurizing stage also containing one or more reaction zones where it is reacted in the presence of hydrogen and a second hydrodesulfurizing catalyst at hydrodesulfurizing conditions. The catalyst in any one or more reaction zones is a bulk multimetallic catalyst comprised of at lease one Group VIII non-noble metal and at least two Group VIB metals.
Type:
Grant
Filed:
January 14, 2000
Date of Patent:
March 8, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Kenneth Lloyd Riley, Darlene Schuette, Stuart Leon Soled, Sabato Miseo, William Lee Schuette
Abstract: The instant invention provides a late transition metal complex which can be used with an activating cocatalyst to produce polymers and copolymers. The invention also provides methods for polymerizing olefins, as well as copolymers having polar monomers incorporated therein.
Type:
Grant
Filed:
July 16, 2004
Date of Patent:
March 8, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Lisa Saunders Baugh, Abhimanyu Onkar Patil, Donald Norman Schulz, Robert Timothy Stibrany, Joseph Anthony Sissano, Stephen Zushma
Abstract: The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment composition containing water, dissolved alkali metal hydroxide, cobalt phthalocyanine sulfonate, and dissolved alkylphenylates and having at least two phases, (i) the first phase containing water, alkali metal alkylphenylate, dissolved alkali metal hydroxide, and dissolved sulfonated cobalt phthalocyanine, and (ii) the second phase containing water and dissolved alkali metal hydroxide; and then (b) separating an upgraded hydrocarbon.
Type:
Grant
Filed:
June 4, 2002
Date of Patent:
March 1, 2005
Assignees:
ExxonMobil Research and Engineering Company, Merichem Company
Inventors:
Mark A. Greaney, Bihn N. Le, Daniel P. Leta, John N. Begasse, Charles T. Huang, Verlin Keith Turner
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
Abstract: The invention relates to a method for improving yield in petroleum streams derived from coking processes. In a preferred embodiment, the invention relates to a method for regenerating filters employed to remove particulate matter from coker gas oil to improve coker gas oil yield and yield of upgraded coker gas oil products.
Type:
Grant
Filed:
November 12, 2002
Date of Patent:
March 1, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Michael Siskin, Ramesh R. Hemrajani, Glen E. Phillips, Simon R. Kelemen, Kuangnan Qian
Abstract: A catalyst composition for the cracking of heavy oil, which has high cracking activity for heavy components in the heavy oil and features reduced deposition of coke. The catalyst composition is comprised of a zeolite, a mixed metal oxide, clay and a metal oxide, and the total acidity of a portion of said catalyst, said portion being composed of said catalyst components other than said zeolite, is from 0.02 to 0.08 mmol/g.
Type:
Grant
Filed:
October 15, 2002
Date of Patent:
February 22, 2005
Assignee:
ExxonMobil Research and Engineering Company
Abstract: In an embodiment, the invention relates to a method for reducing coke agglomeration in petroleum streams derived from coking processes. In a preferred embodiment, the invention relates to a method for mitigating filter fouling from a coker gas oil by using a pusher gas substantially free of molecular oxygen.
Type:
Grant
Filed:
July 10, 2002
Date of Patent:
February 15, 2005
Assignee:
ExxonMobil Research and Engineering Company
Abstract: A method for preparing a high-purity ionic liquid having a pH value of 7 and an elemental analysis deviation of less than 0.5 wt % between a calculated elemental analysis and a found elemental analysis for each of carbon, hydrogen and nitrogen, wherein the method comprises forming a monophasic or biphasic mixture of an ionic liquid and an inert liquid. When the monophasic mixture is formed, it is filtered to yield a filtrate from which the high-purity ionic liquid is recovered. When the biphasic mixtures is formed, it is separated into an aqueous phase and ionic liquid phase, whereby the ionic liquid phase is filtered to yield a filtrate from which the high-purity ionic liquid is recovered. Furthermore, the present purification procedure can be used for the clean-up of a contaminated ionic liquid by extracting it into a polar extractant to form an extract containing the ionic liquid. Water traces are removed from the extract.
Type:
Grant
Filed:
October 22, 2002
Date of Patent:
February 8, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Christian P. Mehnert, Nicholas C. Dispenziere, Raymond A. Cook
Abstract: A device and method to extend the useful lubricant life in a diesel engine equipped with an Exhaust Gas Recirculation (EGR) system consisting of placing a chemical filter in an area of relatively higher humidity either in the EGR stream or near the intake manifold. In some cases, placing chemical filters in both locations would be preferred. This device may also be used in combination with a chemical filter placed in the lubricant recirculation system which produces a synergistic effect beyond the individual effects of either component.
Type:
Grant
Filed:
July 15, 2003
Date of Patent:
February 8, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Jason Zhisheng Gao, Mahmoud Mostafa Hafez, Riccardo Conti
Abstract: A synthetic, isoparaffinic heavy hydrocarbon composition useful as a heavy lubricant base stock contains hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100° C., at which temperature its kinematic viscosity is above 8 cSt and has respective initial and end boiling points of at least 850 and 1000° F. (454 and 538° C.). The branching index BI and the branching proximity CH2>4 of the isoparaffinic hydrocarbon molecules, are such that: BI?0.5(CH2>4)<15; and??(a) BI+0.85(CH2>4)<45;??(b) as measured over the hydrocarbon composition as a whole.
Type:
Grant
Filed:
October 8, 2002
Date of Patent:
January 25, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Jack Wayne Johnson, Adeana Richelle Bishop, William Berlin Genetti, Loren Leon Ansell, Rocco Anthony Fiato
Abstract: A hydrocarbon wax product from a hydrocarbon synthesis slurry comprising liquid synthesis product and catalyst particles is purified by introducing a portion of hydrocarbon synthesis slurry from a hydrocarbon synthesis zone to a treatment zone in which a treatment gas contacts the hydrocarbon synthesis slurry. Hydrogen or a hydrogen-containing gas is useful as the treatment gas. The gas treatment removes impurities from the hydrocarbon wax portion of the hydrocarbon synthesis slurry. Purified wax product is separated and removed in situ via wax withdrawal means. This avoids or minimizes the need for further treating the wax product.
Type:
Grant
Filed:
August 23, 2002
Date of Patent:
January 25, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Robert Jay Wittenbrink, Loren Leon Ansell, Daniel Francis Ryan, Louis Francis Burns
Abstract: A device and a method for real time optimizing engine lubricating oil properties in response to actual engine operating conditions. the present invention is a method that comprises measuring, directly or indirectly, a system parameter of interest near a location of interest, calculating from said parameter(s) or input(s) the amount of a secondary fluid selected from performance enhancer(s), additional base lubricant, alternatively formulated lubricant or diluent that need be added to the base lubricant; and supplementing said base lubricant with said secondary fluid before introducing the combination into said monitored location.
Type:
Grant
Filed:
January 24, 2003
Date of Patent:
January 25, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Vincent M. Carey, Kevin John Kelly, Keith P. Saddler, Kevin L. Crouthamel
Abstract: A method for extending the operating life of a fixed bed reactor for reacting a feedstock in which a feedstock is contacted with a fixed bed of catalytic material contained in the reactor.
Type:
Grant
Filed:
November 14, 2000
Date of Patent:
January 25, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Ramesh Gupta, Salvatore Joseph Rossetti, David Charles Dankworth, Jeffrey L. Kaufman, David Lee Vannauker, James Philip Bailor
Abstract: The invention relates to a process for forming a low-sulfur motor gasoline and the product made therefrom. In one embodiment, process involves separating a catalytically cracked naphtha into at least a light fraction boiling below about 165° F. and a heavy fraction boiling above about 165° F. The light fraction is treated to remove sulfur by a non-hydrotreating method, and the heavy fraction is hydrotreated to remove sulfur to a level of less than about 100 ppm.
Type:
Grant
Filed:
January 15, 2003
Date of Patent:
January 18, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Gordon F. Stuntz, Robert C. W. Welch, Thomas R. Halbert
Abstract: The present invention includes a method to determine if asphaltenes are soluble or insoluble in a solution. The solution may be a petroleum oil, a mixture of petroleum oils, petroleum derived oils and mixtures or similar combinations in a solvent. The invention includes the steps of illuminating the solution with a laser, measuring the small angle scattered light as a function of angle away from the laser beam, and determining if the asphaltenes are soluble or insoluble in the solution.
Type:
Grant
Filed:
June 10, 2003
Date of Patent:
January 4, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Thomas G. Mason, James C. Sung, Zhengdong Cheng, Eric B. Sirota, Michael Siskin
Abstract: The invention relates to a process for converting cycle oils produced in catalytic cracking reactions into olefin and naphtha. More particularly, the invention relates to a process for hydroprocessing a catalytically cracked light cycle oil, and then re-cracking it in an upstream zone of the primary FCC riser reactor.
Type:
Grant
Filed:
October 2, 2002
Date of Patent:
January 4, 2005
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Gordon F. Stuntz, George A. Swan, III, William E. Winter, Michel Daage, Michele S. Touvelle, Darryl P. Klein
Abstract: Method and system for removing accumulated sediment at the bottom of a waste pond or lagoon of a wastewater treatment plant for a petroleum refinery. The system comprises a primary oil separation stage for separating hydrocarbons from the wastewater stream by gravity, a secondary oil removal stage and a biological treatment stage downstream of the secondary oil removal stage. A portion of the sediment from the bottom of the waste pond or lagoon is passed to the secondary oil removal stage and/or the biological treatment stage for processing with the refinery wastewater being treated in these stages.
Type:
Grant
Filed:
October 8, 2002
Date of Patent:
January 4, 2005
Assignee:
ExxonMobil Research and Engineering Company