Patents by Inventor Dennis J. O'Rear

Dennis J. O'Rear has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20030121464
    Abstract: The present invention relates to the use of deactivatable biocides in ballast water aboard a vessel. The present invention relates to methods of limiting the transfer of one or more life forms via ballast water comprising mixing an effective amount of the deactivatable biocide with the ballast water and irreversibly deactivating the deactivatable biocides before or upon discharge of the ballast water.
    Type: Application
    Filed: October 18, 2001
    Publication date: July 3, 2003
    Inventors: Kirk T. O'Reilly, Michael E. Moir, Dennis J. O'Rear, Mark R. Buetzow, Brian V. Dorsch
  • Publication number: 20030116469
    Abstract: A stable distillate fuel blend useful as a fuel or as a blending component of a fuel that is suitable for use in turbine engine, said fuel blend prepared from at least one highly paraffinic distillate fuel component having low to moderate branching and at least one conventional petroleum-derived distillate fuel component and a process for preparing same involving the blending of at least two components having antagonistic properties with respect to one another.
    Type: Application
    Filed: October 19, 2001
    Publication date: June 26, 2003
    Inventors: Gregory Hemighaus, Dennis J. O'Rear
  • Publication number: 20030098261
    Abstract: A stable distillate fuel blend useful as a fuel or as a blending component of a fuel that is suitable for use in an internal combustion engine, said fuel blend prepared from at least one highly paraffinic distillate fuel component and at least one highly aromatic petroleum-derived distillate fuel component and a process for preparing same involving the blending of at least two components having antagonistic properties with respect to one another.
    Type: Application
    Filed: October 19, 2001
    Publication date: May 29, 2003
    Inventors: John D. Bacha, Dennis J. O'Rear
  • Publication number: 20030100453
    Abstract: A lube base oil comprising a synthetic lube base oil, such as a Fischer Tropsch-derived component, and a non-synthetic lube base oil is defined that has improved stability to oxidation both during storage and during use in engines or other applications, even in the substantial absence of anti-oxidant additives and oxidation promoters.
    Type: Application
    Filed: September 27, 2001
    Publication date: May 29, 2003
    Inventor: Dennis J. O'Rear
  • Patent number: 6569909
    Abstract: The present invention relates to methods of inhibiting growth and reproduction of microorganisms in rapidly biodegradable hydrocarbonaceous products, containing minor amounts of aqueous liquids. The present invention also relates to rapidly biodegradable hydrocarbonaceous products containing an effective amount of a petroleum-derived hydrocarbonaceous product such that the rapidly biodegradable hydrocarbonaceous product resists visible growth of microorganisms.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: May 27, 2003
    Assignee: Chervon U.S.A., Inc.
    Inventors: Kirk T. O'Reilly, Michael E. Moir, Dennis J. O'Rear
  • Patent number: 6566569
    Abstract: A process for preparing a C4- product stream and a C6+ product stream is disclosed. The process involves contacting a C5 containing paraffinic feedstock with a catalyst that includes a hydrogenation/dehydrogenation catalyst and an olefin metathesis catalyst under conditions which dehydrogenate the paraffins to olefins. The olefins are then metathesized and rehydrogenated to provide a product stream. A C4- fraction and a C6+ fraction can each be isolated from the product stream. The C4- fraction can be used, for example, in an alkylation reaction to provide compounds useful in gasoline compositions. Unconverted C5 paraffins can be recycled. The C6+ fraction can be used, for example, as solvents. Alternatively, they can be isomerized to form gasoline additives, or can be converted to aromatic compounds via reforming, for example, using conventional reforming techniques, preferably using the AROMAX™ process or traditional rheniforming conditions.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: May 20, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cong-Yan Chen, Dennis J. O'Rear, Scott R. Brundage
  • Publication number: 20030085153
    Abstract: The invention provides distillate fuel blend components with improved seal swell and lubricity properties obtained from Fischer Tropsch products. The blends contain a highly paraffinic distillate fuel component and distillate-boiling alkylcycloparaffins and/or distillate-boiling alkylaromatics. The invention further provides processes for obtaining such blends using the products of Fischer Tropsch processes. Finally, the invention provides methods for improving seal swell and lubricity properties for distillate fuels.
    Type: Application
    Filed: October 19, 2001
    Publication date: May 8, 2003
    Inventor: Dennis J. O'Rear
  • Publication number: 20030088133
    Abstract: The invention provides methods for preparing a blended lube base oils comprising at least one highly paraffinic Fischer Tropsch lube base stocks and at least one base stock composed of alkylaromatics, alkylcycloparaffins, or mixtures thereof. The use of base stocks composed of alkylaromatics, alkylcycloparaffins, or mixtures thereof improves the yield of lube base oils from Fischer Tropsch facilities, as well as provides moderate improvements in physical properties including additive solubility. The invention provides processes for obtaining such blended lube base oils using the products of Fischer Tropsch processes.
    Type: Application
    Filed: October 19, 2001
    Publication date: May 8, 2003
    Inventor: Dennis J. O'Rear
  • Publication number: 20030080027
    Abstract: A process for treating nitrogen-containing, substantially paraffinic product derived from a Fischer-Tropsch process. The substantially paraffinic product is purified in a purification process to lower the concentration of oxygen, nitrogen, and other impurities. The nitrogen content of the purified product is monitored, and the conditions of the purification step are adjusted to increase nitrogen removal if the nitrogen content of the purified product exceeds a preselected value.
    Type: Application
    Filed: August 23, 2002
    Publication date: May 1, 2003
    Inventors: John M. Rosenbaum, Christopher A. Simmons, Dennis J. O'Rear
  • Patent number: 6541524
    Abstract: Facilities to convert natural gas into syncrude often are located at remote sites. At these sites and in their surrounding communities there exists demand for salable products: gasoline, distillate fuels, solvents, lubricants, etc. While it would be possible to produce these products from syncrude, the construction of such production facilities would be very expensive, and their operation would be difficult at the remote site. Fischer-Tropsch syncrude will be waxy and will also contain volatile components, complicating the shipping of both Fischer-Tropsch products from remote production sites to developed sites and salable products from developed sites to remote sites. This invention describes a safe process to both transport Fischer-Tropsch syncrude from the remote site to the developed site and supply salable products from the developed site to the remote site.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: April 1, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, March R. Buetzow
  • Publication number: 20030055116
    Abstract: A method for removing CO2 from a gas stream, including methane and CO2. The method includes contacting a gas stream with an aqueous stream, so that at least a portion of the CO2 in the gas stream is dissolved into the aqueous stream, thereby creating a CO2-depleted gas stream, having an enriched methane concentration, and a CO2-enriched aqueous stream. The CO2-enriched aqueous stream is separated from the gas stream. Finally, the CO2-enriched aqueous stream is disposed of in at least one of a marine environment, a terrestrial formation or combination thereof.
    Type: Application
    Filed: September 14, 2001
    Publication date: March 20, 2003
    Inventors: Dennis J. O'Rear, Curtis Munson
  • Publication number: 20030055117
    Abstract: A process for removing CO2 from a CO2-containing gas. The process includes scrubbing CO2 from a CO2-containing gas using an aqueous phase liquid forming a CO2-enriched aqueous phase. The CO2-enriched aqueous phase is then disposed of in at least one of a marine environment, a terrestrial formation or combination thereof.
    Type: Application
    Filed: September 14, 2001
    Publication date: March 20, 2003
    Inventors: Dennis J. O'Rear, Curtis Munson
  • Publication number: 20030045591
    Abstract: The present invention discloses a process for converting synthesis gas into hydrocarbonaceous products including the steps of: (a) subjecting a first portion of synthesis gas to a dual functional syngas conversion process to form a first effluent comprising a first hydrocarbonaceous product including aromatics and iso-paraffins; (b) subjecting a second portion of synthesis gas to a Fischer-Tropsch synthesis process to form a second effluent comprising a second hydrocarbonaceous product including linear paraffins and linear olefins; and (c) alkylating the linear olefins with the iso-paraffins to produce high octane gasoline range alkylate.
    Type: Application
    Filed: August 23, 2001
    Publication date: March 6, 2003
    Inventor: Dennis J. O'Rear
  • Patent number: 6518321
    Abstract: A transportable Fischer-Tropsch syncrude product and a method for manufacturing and (transporting and/or receiving) the product is disclosed. The product has a true vapor pressure of less than about 15 psia, preferably less than 11 psia, when measured at its transportation temperature, and includes at least 60% by weight, preferably at least 75% by weight, of linear hydrocarbons. The method involves converting a light hydrocarbon feedstock into syngas, converting the syngas to products via Fischer-Tropsch synthesis, and isolating a plurality of transportable products from the Fischer-Tropsch synthesis. The products have true vapor pressures of less than about 15 psia, preferably less than about 11 psia, when measured at their transportation temperature. At least one of the transportable products has a pour point in excess of 20° C. At least two of the products are transported separately in liquid form.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: February 11, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, Mark R. Buetzow
  • Publication number: 20030019792
    Abstract: A catalytic hydrodealkylation/reforming process which comprises contacting a heavy hydrocarbon feedstream under catalytic hydrodealkylation/reforming conditions with a composition comprising borosilicate molecular sieves.
    Type: Application
    Filed: December 11, 2001
    Publication date: January 30, 2003
    Inventors: Cong-Yan Chen, Stacey I. Zones, Andrew Rainis, Dennis J. O'Rear
  • Publication number: 20020193649
    Abstract: Processes for converting linear hydrocarbon into normal alpha olefins (“NAOs”). The process comprises a sequence of controlled dehydrogenation followed by ethenolysis. The process is especially applicable to upgrade linear hydrocarbons such as produced by Fischer-Tropsch type processes. A process for converting C1-C3 alkanes into NAOs and an integrated process including hydrocracking are also disclosed.
    Type: Application
    Filed: January 7, 2002
    Publication date: December 19, 2002
    Inventors: Dennis J. O'Rear, William L. Schinski, Saleh Elomari, Richard N. Reynolds, Steven J. Herron
  • Publication number: 20020193646
    Abstract: The present invention relates blended hydrocarbonaceous products comprising Fischer Tropsch derived products that resist oxidation and to methods of inhibiting oxidation in Fischer Tropsch products. The present invention also relates to Fischer Tropsch products containing an effective amount of a petroleum-derived hydrocarbonaceous product such that the Fischer Tropsch product resists oxidation.
    Type: Application
    Filed: June 15, 2001
    Publication date: December 19, 2002
    Inventor: Dennis J. O'rear
  • Publication number: 20020193645
    Abstract: The present invention relates to the use of antioxidants in Fischer Tropsch derived products. The antioxidants of the present invention are preferably temporary antioxidants that may be removed after the period in which oxidation is expected by techniques such as simple distillation. The temporary antioxidants of the present invention are typically sulfur-containing compounds generated from sweetening light hydrocarbon streams.
    Type: Application
    Filed: June 15, 2001
    Publication date: December 19, 2002
    Inventor: Dennis J. O'Rear
  • Publication number: 20020187094
    Abstract: Methods for removing sulfur from syngas in a Fischer-Tropsch reactor, and reactors including means for removing sulfur from syngas are disclosed. Sulfur-reactive metals can be used in the Fischer-Tropsch unit to sequester the sulfur. For example, the Fischer-Tropsch unit can be run in stages, using a sacrificial catalyst in a first stage to adsorb the sulfur. The Fischer-Tropsch reactor can include internal baffles that separate the reactor into zones, with a sacrificial catalyst in one or more of the zones, that can be easily sequestered and regenerated or replaced. Sulfur adsorbents can be placed in the inlet gas manifold. A portion of the Fischer-Tropsch catalyst can be converted into larger size pellets that do not fluidize with the finer grain Fischer-Tropsch catalyst and remain near the gas inlet where they adsorb and sequester the sulfur. These embodiments can be combined in any suitable manner to lower the sulfur concentration in the syngas feed.
    Type: Application
    Filed: April 27, 2001
    Publication date: December 12, 2002
    Inventors: Robert J. Motal, Dennis J. O'Rear
  • Publication number: 20020182735
    Abstract: Methods for discovering optimum catalysts and/or reaction conditions for performing endo-or exothermic reactions, in particular gas-to-liquid reactions, are disclosed. A combinatorial approach is used to identify optimum catalysts and/or reaction conditions for performing the reactions. The reactions are performed in the channels of a microchannel reactor. These results can be used directly to optimize large scale reactions performed in a plurality of microchannel reactors, or can be correlated to useful catalysts and reaction conditions for use in large scale reactors by taking into consideration the heat transfer effects in the microchannel reactor and the large scale reactor. The method can advantageously be used to generate a database of combinations of catalyst systems and/or reaction conditions which provide various product streams, such that as market conditions vary and/or product requirements change, conditions suitable for forming desired products can be identified with little or no downtime.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 5, 2002
    Inventors: Charles L. Kibby, Dennis J. O'Rear, Georgieanna L. Scheuerman