Patents Represented by Attorney Malcolm D. Keen
  • Patent number: 8337596
    Abstract: Hydrocarbyl substituted and unsubstituted polyethylene imines and polyacrylamide salts are absorption compositions and are useful in processes for the treatment of acid gas mixtures.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: December 25, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Frank Cheng-Yu Wang, Michael Siskin
  • Patent number: 8221591
    Abstract: A delayed coking unit with a coking drum having an upper cylindrical portion and a lower frusto-conical portion is supported by means of a support structure surrounding the cone frustum of the lower portion of the drum; the support structure comprises a cone support member having a concave frusto-conical support surface mating with the outer convex cone frustum of the lower portion of the drum so that the drum sits in the cone support element. The support structure further has a weight supporting member or members attached to the cone support member intermediate its upper and lower peripheries which acts or act to transfer the weight of the drum (and contents) downwards to a suitable sub-structure such as a concrete slab. In a preferred embodiment, the drum may also be stayed against lateral forces by means of guide members at the upper portion of the drum.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: July 17, 2012
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Domingo E. de Para, Claude A. Lafleur, Ronald J. Kobialka
  • Patent number: 8212098
    Abstract: An improved process for removing polymeric by-product (ASO) from the HF alkylation acid in an HF alkylation unit used for the production of gasoline boiling range alkylate product by olefin/iso-paraffin alkylation, comprises fractionating a portion of the circulating HF alkylation acid inventory of the unit with a portion of hot alkylate product in a fractionation zone to from an overhead product comprising HF alkylation acid and water and a bottoms fraction comprising the polymeric by-product and alkylate. The bottoms fraction is sent to the isoparaffin stripper of the unit to remove trace HF alkylation acid as overhead and form a product stream of hot alkylate as a bottoms fraction.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: July 3, 2012
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: D'Arcy H. J. Blais, Doug F. Bodeux, Steve L. Burgwin, Alexander D. Chan, Gary S. Locke, Jerry H. Squires, Sarah J. Virtue
  • Patent number: 8152903
    Abstract: Hindered cyclic polyamines and their salts are absorbents useful in acid gas treatment processes.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: April 10, 2012
    Assignee: ExxonMobile Research & Engineering Company
    Inventors: Michael Siskin, Alan R Katritzky, Edmund J. Mozeleski, Frank Cheng-Yu Wang
  • Patent number: 8119084
    Abstract: A reactor for the autorefrigerant alkylation process has a cylindrical upright reactor vessel with the inlet for the refrigerant reactant and the sulfuric acid at its lower end and a series of inlets for the olefin reactant at vertically spaced intervals up the length of the reactor. An extended, sinuous flow path for the reactants is provided by means co-acting baffles co-acting baffles having, alternately along the length of the reactor, central flow passages and peripheral flow passages for the reaction mixture to define sequential reaction zones in which alkylation takes place. The baffles interact with a rotary mixer with multiple impellers located on the reactor axis. The reaction mixture flows alternately towards and away from the reactor walls in the sequence of serial reaction zones within the reactor to promote mixing of the isoparaffin reactant with the acid catalyst.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 21, 2012
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Ramon A. Strauss, Ramesh R. Hemrajani, Guido L. Spinelli
  • Patent number: 8101066
    Abstract: An improved fluidized coking process wherein an effective amount of a basic material, preferably an alkali or alkaline-earth metal-containing compound, is added to the coking zone to mitigate agglomeration of the coke during the coking of a heavy hydrocarbonaceous feedstock to produce lower boiling products.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: January 24, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Michael Siskin, Simon R. Kelemen, Christopher P. Eppig
  • Patent number: 8066949
    Abstract: Fouling in the scrubber section of a fluid coker unit is reduced by providing perforated baffles to improve the uniformity of the gas flow profile in the scrubber by reducing the gas velocity of the cyclone outlet gases in the scrubber section of the unit. These baffles are located with the objective of reducing the rotational component of the gas flow in the scrubber created by the alignment of the gas outlets of the cyclones. The baffles are preferably located in the shed section of the scrubber and comprise upstanding perforated plates located at the periphery of the scrubber section to disrupt high velocity gas jets in the region of the interior wall of the scrubber.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: November 29, 2011
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Craig A. McKnight, Larry P. Hackman, Brian A. Knapper, Daniel Bulbuc, George B. Jones, Jonathan Tyler, Darwin E. Kiel
  • Patent number: 7931798
    Abstract: A heavy residual petroleum feed boiling above 650° F.+ (345° C.+) is subjected to hydroconversion at elevated temperature in the presence of hydrogen at a hydrogen pressure not normally higher than 500 psig (3500 kPag) using a dispersed metal-on-carbon catalyst to produce a hydroconverted effluent which is fractionated to form a low boiling fraction and a relatively higher boiling fraction which is subjected to membrane separation to produce a permeate which is low in metals and Microcarbon Residue (MCR) as well as a retentate, containing most of the MCR and metals. The process has the advantage that the hydroconversion may be carried out in low pressure equipment with a low hydrogen consumption as saturation of aromatics is reduced.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: April 26, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Martin L. Gorbaty, David T. Ferrughelli, Edward W. Corcoran, Stephen M. Cundy, Andrew Kaldor
  • Patent number: 7927479
    Abstract: Performance of equipment, such as a desalter, in a refinery is monitored in real-time and on-line to minimize fouling of downstream equipment. Using an instrument to measure particles and droplets in-process allows monitoring of the various operations to optimize performance. Such measurement can also be used during crude oil blending to detect asphaltene precipitates that can cause fouling and can be used for monitoring other fouling streams.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: April 19, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Mark A. Greaney, Glen B. Brons, Chris A. Wright, Daniel P. Leta
  • Patent number: 7914668
    Abstract: The invention relates to a thermal conversion process for continuously producing hydrocarbon vapor and continuously removing a free-flowing coke. The coke, such as a shot coke, can be withdrawn continuously via, e.g., a staged lock hopper system.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: March 29, 2011
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Michael Siskin, Christopher P. Eppig, Glen E. Phillips, Te-Hung Chen, Charles J. Mart
  • Patent number: 7794587
    Abstract: A method for altering coke morphology in a delayed coking process of heavy oil is provided. An effective amount of oil dispersible or oil soluble metal salts of aromatic sulfonic acids and/or polysulfonic acids is added or contacted with the resid or heavy oil at a point before or after the step of heating the heavy oil to coking temperatures. The addition of additives facilitates the formation of shot coke and inhibits the formation of sponge coke.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: September 14, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ramesh Varadaraj, Michael Siskin, Leo D. Brown, Cornelius H. Brons
  • Patent number: 7736470
    Abstract: Described herein are methods and mechanisms for laterally dispensing fluid to a coke drum in a predictable and maintainable manner that alleviates thermal stress. In one embodiment, the methods and mechanisms utilize a split piping system to dispense fluid through two or more inlets into a spool that is connected to a coke drum and a coke drum bottom deheader valve. A combination of block valves and clean out ports provides a more effective means to clean the lines and allows fluid to be laterally dispensed in a controllable and predictable manner. The fluid is preferably introduced to the spool in opposing directions toward a central vertical axis of the spool at equal but opposing angles ranging from minus thirty (?30) to thirty (30) degrees relative to a horizontal line laterally bisecting the spool. Alternatively, however, fluid can be introduced to the spool tangentially.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: June 15, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Te-Hung Chen, Christopher P. Eppig, Timothy M. Healy, Scott F. Massenzio, Robert W. Mosley, Rutton D. Patel
  • Patent number: 7727382
    Abstract: A method for producing and removing coke which has bulk morphology such that at least about 30 volume percent is free-flowing under the force of gravity or hydrostatic forces from a delayed coker drum. At the completion of the fill cycle, the coker drum, filled with hot coke, is cooled by steaming and then flooding it with water, thereby producing a coke/water mixture. The coke/water mixture is released from the coke drum through one or more drum closure/discharge throttling systems near the bottom of the coker drum.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: June 1, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Steven W. Sparks, Te-Hung Chen, Christopher P. Eppig, Michael Siskin
  • Patent number: 7686940
    Abstract: This invention relates to a process for reducing fouling of equipment used in fluidized bed thermal conversion processes such as fluid coking and FLEXICOKING™. Acoustic energy is used to acoustically agglomerate fine mists created during the coking process. The agglomerated mists are then carried along with the circulating coke instead of depositing on coking equipment.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: March 30, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Glen E. Phillips, Leo D. Brown, Michael Siskin
  • Patent number: 7427385
    Abstract: Systems and processes for removing a first sulfur compound from a hydrocarbon stream. The systems and process utilize at least one reaction vessel incorporating a hydrolysis catalyst suitable for hydrolyzing the first sulfur compound to a second sulfur compound. The reaction vessel also incorporates a sorbent material suitable for absorbing the second sulfur compound. Following hydrolysis of the first sulfur compound to the second sulfur compound and absorption of the second sulfur compound, a hydrocarbon-containing stream having a reduced sulfur content is produced. The hydrolysis catalyst and sorbent material may be provided in separate zones within the reaction vessel or provided as a mixture in a single zone. The hydrocarbon-containing stream having a reduced sulfur content is suitable for a variety of uses, including as a feedstreams for hydrogen plants, process gas streams for power generation plants, or for other uses for hydrocarbon-containing stream having reduced sulfur content.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: September 23, 2008
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Glen E. Scheirer, Francis S. Wu, Thomas R. Kiliany
  • Patent number: 7067049
    Abstract: The present invention relates to formulated lubricant oils derived from a highly paraffinic basestock. The lubricating oils of the present invention achieve the extremely stringent viscosity requirements of SAE “0W” crossgraded engine oils and demonstrate an excellent combination of low-temperature performance and biodegradability not achievable by other formulations derived from other classes of basestocks.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: June 27, 2006
    Assignee: Exxonmobil Oil Corporation
    Inventors: David J. Baillargeon, Thomas R. Forbus, Jr., Kenneth R. Graziani, Gretchen R. Hall, Nancy M. Page, Richard F. Socha
  • Patent number: 6938635
    Abstract: The present invention comprises a novel level switch which may be employed to detect liquid levels within a process vessel. The level switch of the present invention is self validating so that manual testing is not required in order to ensure proper operation and switch calibration. The switch of the present invention may be easily introduced into existing process vessel designs as a replacement for prior art level detection switches with minimal or no retrofitting effort being required. The self validating level switch of the present invention may be connected to a Safety Instrumented System (SIS) such that process control including process shutdowns to avoid overfilling and low-fluid conditions may be accomplished.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: September 6, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Daniel B. Bolland
  • Patent number: 6877725
    Abstract: This invention is directed to a cyclonic vapor/liquid contacting device and distillation or related mass transfer or heat transfer processes employing its use, such as fluid catalytic cracking. Liquid feed is introduced near the floor of the cyclone via downcomer or plenum. Vapor enters through sieve holes in the bottom of the cyclonic device. Near the floor are angled tabs or vanes that impart a spin to the vapor rising up through the floor. The tabs or vanes mix the liquid and vapor. The liquid is then thrown toward the cyclone wall, where it exits through slots in the wall. A second set of tabs or vanes, located about in the middle of the cyclone, imparts additional spin to the vapor and entrained liquid rising through the cyclone. This improves liquid collection by the cyclone, especially in cases where a heavy liquid load dampens the spin action of the vapor in the base of the cyclone.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: April 12, 2005
    Assignee: Mobil Oil Corporation
    Inventors: John Scott Buchanan, Berne K. Stober
  • Patent number: 6846469
    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
  • Patent number: 6837997
    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
    Inventor: John B. Wilkinson