Abstract: The present invention relates to catalysts for hydrodesulfurizing naphtha streams. The catalysts are comprised of a suitable support material, and about 1 to about 10 wt. % MoO.sub.3, about 0.1 to about 5 wt. % CoO supported on a suitable support material. They are also characterized as having an average medium pore diameter from about 60 .ANG. to 200 .ANG., a Co/Mo atomic ratio of about 0.1 to about 1.0, a MoO.sub.3 surface concentration of about 0.5.times.10.sup.-4 to about 3.0.times.10.sup.-4 g MoO.sub.3 /m.sup.2, and an average particle size of less than about 2.0 mm in diameter.
Type:
Grant
Filed:
December 12, 1997
Date of Patent:
January 11, 2000
Assignee:
Exxon Research and Engineering Co.
Inventors:
Mark P. Lapinski, Kenneth L. Riley, Clyde L. Aldridge, Michele S. Touvelle
Abstract: The invention relates to a process for demetallating a petroleum stream by contacting a metals-containing petroleum feed in the presence of a base selected from Group IA and IIA hydroxides and carbonates and ammonium hydroxide and carbonates and mixtures thereof an oxygen containing gas and a phase transfer agent at a temperature of up to 180.degree. C. for a time sufficient to produce a treated petroleum feed having a decreased metals content. The invention provides a method for enhancing the value of petroleum feeds that traditionally have limited use in refineries due to their metals, e.g., Ni and V content.
Type:
Grant
Filed:
December 18, 1998
Date of Patent:
January 11, 2000
Assignee:
Exxon Research and Engineering Co.
Inventors:
Mark Alan Greaney, Roby Bearden, Jr., Michael Charles Kerby
Abstract: A composition for dispersing oil slicks consisting of a surfactant or a mixture of surfactants having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different oxyalkylene or polyoxyalkylene groups,andwherein R.sub.3 and R.sub.4 are the same or different alkyl or alkenyl groups. The composition also includes a carrier solvent.
Type:
Grant
Filed:
September 8, 1998
Date of Patent:
January 4, 2000
Assignee:
Exxon Research and Engineering Co.
Inventors:
Ramesh Varadaraj, Max Leo Robbins, Jan Bock, Salvatore James Pace
Abstract: The invention is a method for improving the friction reduction and friction reduction retention performance of a lubricating oil comprising adding to the lubricating oil a trinuclear molybdenum sulfur compound selected from the group of trinuclear molybdenum compounds preferably those having the formulas Mo.sub.3 S.sub.7 (dtc).sub.4 and Mo.sub.3 S.sub.4 (dtc).sub.4 and mixtures thereof wherein dtc represents independently selected diorganodithiocarbamate ligands containing independently selected organo groups and wherein the ligands have a sufficient number of carbon atoms among all the organo groups of the compound's ligands are present to render the compound soluble or dispersible in the lubricating oil. Concentrates of the composition are also included in the invention.
Type:
Grant
Filed:
April 18, 1997
Date of Patent:
January 4, 2000
Assignee:
Exxon Research and Engineering Co.
Inventors:
Edward Ira Stiefel, Jonathan M. McConnachie, Daniel Paul Leta, Charles Frederick Pictroski
Abstract: The present invention relates to a process for demetallating a petroleum stream by contacting a metals-containing petroleum feed in the presence of an aqueous base selected from Group IA and IIA hydroxides and carbonates and ammonium hydroxide and carbonate and mixtures thereof, an oxygen containing gas and a phase transfer agent at a temperature of up to 180.degree. C. for a time sufficient to produce a treated petroleum feed having a decreased metals content. The invention provides a method for enhancing the value of petroleum feeds that traditionally have limited use in refineries due to their metals, e.g., Ni and V content.
Abstract: A reaction vessel for processing liquid petroleum or chemical streams wherein the stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas, in at least one interaction zone. The reaction vessel contains vapor, and optionally liquid, passageways to bypass one or more packed beds, preferably catalyst beds. This permits more stable and efficient vessel operation.
Type:
Grant
Filed:
August 23, 1996
Date of Patent:
December 28, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Ramesh Gupta, David C. Dankworth, Dennis D. Fleming, Edward S. Ellis, James J. Schorfheide
Abstract: A polyol ester distillate fuel additive exhibits improved lubricity and friction and wear performance. The ester has between about 1% and about 35% unconverted hydroxyl groups and is characterized as having a hydroxyl number from about 5 to about 180.
Type:
Grant
Filed:
April 3, 1998
Date of Patent:
November 30, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Elisavet P. Vrahopoulou, Richard Henry Schlosberg, David Wayne Turner
Abstract: A process for making a synthesis gas comprising H.sub.2 and CO in the presence of a reforming catalyst comprising a supported non-noble Group VIII metal catalytic component from a feed including a low molecular weight alkane, and preferably methane as in natural gas, O.sub.2, H.sub.2 O and CO.sub.2 without catalyst deactivation is achieved by partially oxidizing and steam reforming the feed in the presence of the catalyst. The feed H.sub.2 O to hydrocarbon carbon mole ratio is less than 2. The mole ratio of the combined feed CO.sub.2 and H.sub.2 O to hydrocarbon carbon ranges from 0.5-2.5 and that of the feed H.sub.2 O to CO.sub.2 ranges from 0.35-6. Synthesis gas having H.sub.2 to CO mole ratios less than 2:1 and even less than 1.5:1 are easily achieved with net CO.sub.2 consumption, which also makes the process environmentally beneficial.
Abstract: A hydroprocessing process for removing impurities from a feed comprising a hydrocarbonaceous liquid comprises at least one cocurrent, upflow hydroprocessing reaction stage, a vapor-liquid contacting stage and a downflow hydroprocessing reaction stage. The feed and hydrogen react in the upflow stage to produce a partially hydroprocessed liquid and vapor effluent. The vapor contacts a hydrocarbonaceous liquid in the contacting stage, which transfers impurities from the vapor into the liquid. The impurity-enriched contacting liquid mixes with the upflow stage liquid effluent and the combined liquid effluents react with hydrogen in the downflow reaction stage, to form a hydroprocessed product liquid and vapor effluent. Additional product liquid is recovered by cooling and condensing either or both the contacting and downflow stage vapor effluents.
Abstract: A process for hydrodesulfurizing naphtha feedstreams wherein the reactor inlet temperature is below the dew point of the feedstock at the reactor inlet so that the naphtha will completely vaporize within the catalyst bed. It is preferred to use a catalyst comprised of about 1 to about 10 wt. % MoO.sub.3, about 0.1 to about 5 wt. % CoO supported on a suitable support material. They are also characterized as having an average medium pore diameter from about 60 .ANG. to 200 .ANG.. a Co/Mo atomic ratio of about 0.1 to about 1.0, a MoO.sub.3 surface concentration of about 0.5.times.10.sup.-4 to about 3.0.times.10.sup.-4 g MoO.sub.3 /m.sup.2, and an average particle size of less than about 2.0 mm in diameter.
Type:
Grant
Filed:
June 18, 1998
Date of Patent:
November 16, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Garland B. Brignac, Jeffrey L. Kaufman, John C. Coker
Abstract: A novel fluidized bed syngas (FBSG) injector/reactor apparatus and an efficient process for the partial oxidation and steam reforming of light hydrocarbon gases such as methane, to convert such gases to useful synthesis gas containing CO and H.sub.2 for recovery and/or subsequent hydrocarbon synthesis. Sources of a light hydrocarbon gas, such as methane, and oxygen or an oxygen-containing gas are preheated and pressurized and injected through gas orifices of an injector at high velocity and comparable momentums into admixture with each other in the desired proportions, at a plurality of mixing chambers or recessed cups which are open to the fluidized bed reaction zone of a reaction chamber and are spaced over the face of the injector, to form a reactant gas premix having a pressure drop of at least 1% through the injector.
Type:
Grant
Filed:
April 25, 1997
Date of Patent:
November 9, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Frank Hershkowitz, Harry W. Deckman, Robert P. Reynolds, Constantine P. Gonatas, John W. Fulton, Leonard Schoenman, Jack I. Ito, Russell J. Koveal, Lavanga R. Veluswamy, James H. Taylor, Alfredo M. Lopez
Abstract: A novel injector/reactor apparatus and an efficient process for the partial oxidation of light hydrocarbon gases, such as methane, to convert such gases to useful synthesis gas for subsequent hydrocarbon synthesis. Sources of a light hydrocarbon gas, such as methane, and oxygen or an oxygen-containing gas are preheated and pressurized and injected through an injector means at high velocity into admixture with each other in the desired proportions, preferably at comparable momentums, at a plurality of mixing nozzles which are open to the reaction zone of a reactor and are spaced over the face of the injector, to form a reactant gas premix having a pressure drop equal to at least 1% of the lowest upstream pressure of either of said gas streams. The gas premix is ejected in a time period which preferably is less than 9 milliseconds, at a velocity between about 25 to 1000 feet/second, into a reaction zone comprising a partial oxidation zone, so that the gas mixture reacts therein.
Type:
Grant
Filed:
April 25, 1997
Date of Patent:
November 9, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Frank Hershkowitz, Harry W. Deckman, Robert P. Reynolds, Constantine P. Gonatas, John W. Fulton, Leonard Schoenman, Jack I. Ito, Russell J. Koveal, Costas A. Coulaloglou
Abstract: Stoichiometric and catalytic chemical transformations may be carried out in solution using novel fluorous multiphase systems (FMS). The term "fluorous" is defined as a carbon-fluorine bond rich organic molecule which is generated by replacing hydrogen atoms bonded to carbon atoms with fluorine. The novel complexes suitable for use as fluorous catalysts and reagents in the present invention contain sufficient number of fluorous moieties to render them preferentially soluble in the appropriate fluorous solvent without impairing the ability of the catalyst or reagent to be effective or participate in the corresponding reaction.
Abstract: The present invention is a non-intrusive method to determine the flow state or voidage in an apparatus that interacts a gas phase with a liquid phase. The flow state or voidage is determined by relating them to wall vibrations.
Type:
Grant
Filed:
September 26, 1997
Date of Patent:
November 2, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
George Dewey Cody, David R. Johnsrud, Uri Sela
Abstract: The present invention is a large-pore aluminophosphate or substituted aluminophosphate comprising a compositionaR:(M.sub.x Al.sub.y P.sub.z)O.sub.2wherein R represents an organic templating agent, and a=0 to 0.4, X=0 to 0.4, y=0.35 to 0.5, and Z=0.25 to 0.5 and characterized by the diffraction pattern of Table 1 and M may be Si, Ga, Ge, Co, Ni, Zn, Fe, V, Ti and mixtures thereof.
Abstract: The present invention is a process to remove a +2 ionic charged metal from a petroleum feed. The process includes contacting the feed with a resin that includes carboxyl, sulfonic and/or phosphonic groups. In a preferred embodiment the metal is a Group II metal. In particular, the metal is calcium.
Type:
Grant
Filed:
March 6, 1998
Date of Patent:
November 2, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Guido Sartori, David W. Savage, Saul C. Blum, Bruce H. Ballinger
Abstract: It has been discovered that waxy feeds can be upgraded using a catalyst made by combining powdered dewaxing catalyst with powdered isomerization catalyst said mixture of powdered catalysts being formed into a discrete particle.
Type:
Grant
Filed:
February 13, 1998
Date of Patent:
November 2, 1999
Assignee:
Exxon Research and Engineering Co
Inventors:
Dee A. Brandes, David N. Zinkie, Sandra Jane Alward, William J. Murphy, Ian A. Cody, Thomas J. Ford
Abstract: A process for producing a high VI/low volatility lubricating oil basestock. The process comprises subjecting the raffinate from a solvent extraction step to a two step, single stage hydroconversion process wherein the first step involves severe hydroconversion of the raffinate followed by a cold hydrofinishing step.
Type:
Grant
Filed:
June 28, 1996
Date of Patent:
November 2, 1999
Assignee:
Exxon Research and Engineering Co
Inventors:
Ian A. Cody, Douglas R. Boate, Sandra J. Alward, William J. Murphy, John E. Gallagher, Gary L. Harting
Abstract: Small particle size catalysts having an average particle size of less than 20 or 10 microns, which agglomerate when contacted with a hydrocarbon liquid, are easily dispersed in the hydrocarbon liquid by first forming a mixture comprising the catalyst particles and one or more non-acidic, liquid polar oxygenates, such as an alcohol, ketone, ester, ether or mixture thereof. The mixture is contacted with the hydrocarbon liquid in which the particles then readily disperse. This process is useful for adding fresh or regenerated small particle size catalyst to catalytic hydroprocessing process slurries, including a reactive Fischer-Tropsch hydrocarbon synthesis slurry. One to four carbon atom alcohols are preferred oxygenates for use with a Fischer-Tropsch slurry.
Type:
Grant
Filed:
November 13, 1998
Date of Patent:
November 2, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
Gregg J. Howsmon, Robert J. Wittenbrink, Claude C. Culross, Louis F. Burns
Abstract: A reversibly deactivated, particulate catalyst in a slurry hydrocarbon synthesis slurry is rejuvenated by circulating the slurry from a slurry body through (i) a gas disengaging zone to remove gas bubbles from the slurry, (ii) a catalyst rejuvenation zone in which a catalyst rejuvenating gas contacts the catalyst in the slurry to rejuvenate it and form a rejuvenated catalyst slurry and, (iii) back into the slurry body. Removing at least a portion of the gas bubbles improves the rejuvenation process.
Type:
Grant
Filed:
October 30, 1998
Date of Patent:
October 26, 1999
Assignee:
Exxon Research and Engineering Co.
Inventors:
William C. Behrmann, Stephen C. Leviness