Abstract: Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution.
Type:
Grant
Filed:
May 20, 1999
Date of Patent:
October 9, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Karl G. Strohmaier, David E. W. Vaughan, Tan Jen Chen, Philip A. Ruziska, Brian Erik Henry, Gordon F. Stuntz, Stephen M. Davis
Abstract: A hydrodenitrogenation catalyst is prepared by decomposing a nickel (ammonium) molybdotungstate precursor and sulfiding, either pre-use or in situ, the decomposition product.
Type:
Grant
Filed:
March 3, 2000
Date of Patent:
October 9, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Stuart L Soled, Sabato Miseo, Roman Krycak, Hilda Vroman, Teh C. Ho, Kenneth L. Riley
Abstract: A process for the desulfurization, and reactivation of a sulfur deactivated catalyst constituted of cobalt composited with a titania support. The sulfur deactivated cobalt titania catalyst is first contacted with a gaseous stream of molecular oxygen at temperature sufficiently high to oxidize the sulfur component of the catalyst. The sulfur oxidized catalyst is next contacted with a liquid, preferably water, to remove the oxide, or oxides of the sulfur. The catalyst is then contacted with a reducing agent, suitably hydrogen, to restore the activity of the catalyst. During the treatment there is no substantial loss, if any, of cobalt from the catalyst.
Type:
Grant
Filed:
September 10, 1999
Date of Patent:
October 9, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Albert L'Vovich Lapidus, Michel A. Daage, Russell J. Koveal, Alla Jurievna Krylova, Anatoliy B. Erofeev
Abstract: Diesel fuels or blending stocks having excellent lubricity, oxidative stability and high cetane number are produced from non-shifting Fischer-Tropsch processes by separating the Fischer-Tropsch product into a lighter and heavier fractions, e.g., at about 700° F., subjecting the 700° F.+fraction to hydro-treating, and combining the 700° F.− portion of the hydrotreated product with the lighter fraction that has not been hydrotreated.
Type:
Grant
Filed:
October 17, 1995
Date of Patent:
October 2, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Robert Jay Wittenbrink, Richard Frank Bauman, Paul Joseph Berlowitz, Bruce Randall Cook
Abstract: A process for upgrading a hydrocarbon oil is provided which comprises introducing the oil and an aromatic extraction solvent containing 0.1 to 10 vol % water into an extraction zone for contact of the oil and solvent therein whereby an extract solution is formed; and injecting water into the extraction zone at a point below that at which the extraction solvent is introduced. The injected water is injected substantially countercurrent to the extraction solvent at a velocity of about 0.5 to 3 ft/sec in an amount ranging from about 0.1 to about 10 LV% based on the amount of extract solution being processed.
Type:
Grant
Filed:
December 10, 1999
Date of Patent:
September 25, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Keith K. Aldous, Joseph P. Boyle, Michael B. Davis
Abstract: A slurry catalytic hydrocarbon synthesis process which employs a catalyst comprising a supported cobalt component achieves a short term catalyst half life of more than 10 days, by using a syngas feed which contains less than fifty parts per billion of a combined total amount of HCN and NH3.
Type:
Grant
Filed:
August 14, 1998
Date of Patent:
September 4, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Stephen C. Leviness, Charles J. Mart, William C. Behrmann, Stephen J. Hsia, Daniel R. Neskora
Abstract: A process for dewaxing waxy hydrocarbonaceous materials, such as hydrocarbon fuel and lubricating oil fractions to reduce their cloud and pour points comprises reacting the material with hydrogen in the presence of a dewaxing catalyst comprising at least one metal catalytic component and ferrierite in which at least a portion of its cation exchange positions are occupied by one or more trivalent rare earth metal cations. The rare earth ion exchanged ferrierite catalyst has good selectivity for lubricating oil production, particularly when dewaxing a Fischer-Tropsch wax hydroisomerate. Preferably at least 10% and more preferably at least 15% of the ferreirite cation exchange capacity is occupied by one or more trivalent rare earth metal cations.
Type:
Grant
Filed:
October 12, 1999
Date of Patent:
September 4, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Bruce R. Cook, Jack W. Johnson, Guang Cao, Rich A. McEvoy, Richard H. Ernst
Abstract: Hydrocarbon in water emulsions comprising Fischer-Tropsch process water, at least 20 to about 90 weight percent of a Fischer-Tropsch wax, a first nonionic surfactant having an HLB of at least 11 and a second nonionic surfactant having an HLB less than 11. Said emulsions are liquid at room temperature and pour by ordinary gravity. Also disclosed are methods of making said hydrocarbon in water emulsions.
Type:
Grant
Filed:
September 12, 1997
Date of Patent:
September 4, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Tapan Chakrabarty, Robert J. Wittenbrink, Paul J. Berlowitz, Loren L. Ansell
Abstract: An additive concentrate for use in fuels, especially in gasoline for internal combustion engines, comprising (a) 0.2 to 10 wt. % ashless friction modifier which is liquid at room temperature and pressure selected from (i) n-butylamine oleate or derivatives thereof, (ii) a substance comprising tall oil fatty acid or derivatives thereof, and (iii) mixtures of (i) and (ii); (b) 10 to 80 wt. % deposit inhibitor, and (c) carrier fluid. The particular selection of friction modifier (a) enables a stable additive concentrate to be formulated without the need for additional solubilising agent for the friction modifier, while containing sufficient friction modifier to achieve a significant benefit in fri loss, when incorporated in gasoline used to fuel an internal combustion engine, and hence an improvement in fuel economy.
Abstract: Diesel fuels or blending stocks having excellent lubricity, oxidative stability and high cetane number are produced from non-shifting Fischer-Tropsch processes by separating the Fischer-Tropsch product into a lighter and heavier fractions, e.g., at about 700° F., subjecting the 700° F.+fraction to hydro-treating, and combining the 700° F.+portion of the hydrotreated product with the lighter fraction that has not been hydrotreated.
Type:
Grant
Filed:
December 16, 1999
Date of Patent:
August 14, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Robert Jay Wittenbrink, Richard Frank Bauman, Paul Joseph Berlowitz, Bruce Randall Cook
Abstract: A downcomer for producing at least two slurries having different solids and gas concentrations from a single three phase slurry of particulate solids and gas bubbles in a slurry liquid has two or more concentric gas and solids disengaging zones, each having an open fluid conduit depending from an orifice in the bottom. The downcomer is useful in a slurry hydrocarbon synthesis process for forming a catalyst and gas reduced slurry which is passed to a liquid filter to remove hydrocarbon liquid from the slurry reactor.
Abstract: The present invention is a process for decreasing the acidity of a starting acidic crude oil by contacting an acidic crude with an effective excess of ammonia dissolved in said crude to form an ammonia-continuous oil discontinuous phase at a temperature and conditions sufficient to form the corresponding amide of the naphthenic acids. The process is useful in the processing of acidic crudes.
Type:
Grant
Filed:
September 21, 1999
Date of Patent:
July 10, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Guido Sartori, David William Savage, William Neergaard Olmstead, Winston Karl Robbins, David Craig Dalrymple, Bruce Henry Ballinger
Abstract: The invention relates to a method for making an asphalt product having an enhanced flash point and lower volatility, comprising vacuum distilling a blend of a high boiling petroleum fraction having an initial boiling point of at least 270° C. and a crude to produce a product asphalt having a flash of from 265° C. to 300° C.
Type:
Grant
Filed:
October 29, 1999
Date of Patent:
July 10, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Mary Josephine Gale, Lyle Edwin Moran, James David Bell, Biddanda Umesh Achia
Abstract: The present invention relates to a process for reducing the acidity of a petroleum oil containing organic acids comprising treating said petroleum oil containing organic acids with an effective amount of an alcohol at a temperature and under conditions sufficient to form the corresponding ester of said alcohol.
Type:
Grant
Filed:
October 6, 1998
Date of Patent:
June 26, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Guido Sartori, David W. Savage, David C. Dalrymple, Bruce H. Ballinger, Saul C. Blum, William E. Wales
Abstract: The invention relates to a process for enhancing demetallation of metals containing hydrocarbonaceous feedstocks by contacting a metals containing hydrocarbonaceous feedstock at a sufficient temperature and pressure with an additive containing a polyoxyalkylene moiety said additive having preferential insolubility in alkane deasphalting solvent to produce an additive treated feedstock; and then contacting the resulting product with an effective deasphalting solvent to produce a deasphalted oil having a decreased metals content and an insoluble metals containing phase.
Abstract: A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected from Pt, Pd, Ir, Rh, and polymetallics thereof. The catalyst system also contains a hydrogen sulfide sorbent material.
Type:
Grant
Filed:
June 7, 1999
Date of Patent:
June 12, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
William C. Baird, Jr., Gary B. McVicker, James J. Schorfheide, Darryl P. Klein, Sylvain S. Hantzer, Michel Daage, Michele S. Touvelle, Edward S. Ellis, David E. W. Vaughan, Jingguang Chen
Abstract: Nickel-copper catalysts supported on an amorphous silica-alumina acidic carrier, preferably containing a binder, and having an iso-electric point of ≧6.5 are used to hydroisomerize paraffins, particularly Fischer-Tropsch paraffins, boiling at 350° F.+ into lighter, more valuable products.
Type:
Grant
Filed:
August 22, 1997
Date of Patent:
June 12, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Janet R. Clark, Robert J. Wittenbrink, Stephen M. Davis, Kenneth L. Riley
Abstract: Composite fiber reinforced structures, such as pipes or storage tanks, having improved resistance to microcracking and delamination and improved containment strength are disclosed. The walls of the structures comprise at least one layer comprising a plurality of continuous reinforcing glass fibers having an average diameter of ≦about 10 microns impregnated in a resinous binder such as a thermoset epoxy resin.
Type:
Grant
Filed:
October 1, 1999
Date of Patent:
June 5, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Liza M. Monette, Michael P. Anderson, Russell R. Mueller, Cary N. Marzinsky, Allen S. Chiu
Abstract: The operation of a hydrocarbon synthesis reactor and catalyst distributed in the reaction slurry therein are improved by the presence in said reactor of one or more vertical downcomers open at both ends with gas disengaging areas located at their top end. The downcomer which circulates catalyst from the top of the reaction slurry to the bottom of said slurry is fully immersed in the reaction slurry and preferably extends from just above the bottom of the reaction zone of the reaction vessel to just below the top surface of the reaction slurry. The bottom end of said downcomer is shielded from intrusion of rising synthesis gas by the placement of a baffle which blocks rising gas entry but facilitates the exit of catalyst and liquid from the bottom of said downcomer and distributes them radially throughout the adjacent reactor slurry.
Type:
Grant
Filed:
August 13, 1998
Date of Patent:
June 12, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
William C. Behrmann, Charles H. Mauldin, Larry E. Pedrick