Patents by Inventor David C. Dankworth

David C. Dankworth 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: 20200071164
    Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Inventors: Ramesh Gupta, Sumathy Raman, Hugo S. Caram, David C. Dankworth
  • Publication number: 20200071162
    Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Inventors: Ramesh Gupta, Sumathy Raman, Hugo S. Caram, David C. Dankworth
  • Publication number: 20190359899
    Abstract: Systems and methods are provided for hydroconversion of a heavy oil feed under slurry hydroprocessing conditions and/or solvent assisted hydroprocessing conditions. The systems and methods for slurry hydroconversion can include the use of a configuration that can allow for improved separation of catalyst particles from the slurry hydroprocessing effluent. In addition to allowing for improved catalyst recycle, an amount of fines in the slurry hydroconversion effluent can be reduced or minimized. This can facilitate further processing or handling of any “pitch” generated during the slurry hydroconversion. The systems and methods for solvent assisted hydroprocessing can include processing of a heavy oil feed in conjunction with a high solvency dispersive power crude.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Inventors: Benjamin S. UMANSKY, Himanshu GUPTA, John D. NELSON, Cindy J. HUGHART, Jane C. CHENG, Steven W. LEVINE, Stephen H. BROWN, Todd P. MARUT, David C. DANKWORTH, Stuart L. SOLED, Thomas F. DEGNAN, JR., Robert J. FALKINER, Mohsen N. HARANDI, Juan D. HENAO, Lei ZHANG, Chuansheng BAI, Richard C. DOUGHERTY
  • Publication number: 20190338203
    Abstract: Systems and methods are provided for hydroconversion of a heavy oil feed under slurry hydroprocessing conditions and/or solvent assisted hydroprocessing conditions. The systems and methods for slurry hydroconversion can include the use of a configuration that can allow for improved separation of catalyst particles from the slurry hydroprocessing effluent. In addition to allowing for improved catalyst recycle, an amount of fines in the slurry hydroconversion effluent can be reduced or minimized. This can facilitate further processing or handling of any “pitch” generated during the slurry hydroconversion. The systems and methods for solvent assisted hydroprocessing can include processing of a heavy oil feed in conjunction with a high solvency dispersive power crude.
    Type: Application
    Filed: July 16, 2019
    Publication date: November 7, 2019
    Inventors: Benjamin S. UMANSKY, Himanshu GUPTA, John D. NELSON, Cindy J. HUGHART, Jane C. CHENG, Steven W. LEVINE, Stephen H. BROWN, Todd P. MARUT, David C. DANKWORTH, Stuart L. SOLED, Thomas F. DEGNAN, JR., Robert J. FALKINER, Mohsen N. HARANDI, Juan D. HENAO, Lei ZHANG, Chuansheng BAI, Richard C. DOUGHERTY
  • Patent number: 10414991
    Abstract: Systems and methods are provided for hydroconversion of a heavy oil feed under slurry hydroprocessing conditions and/or solvent assisted hydroprocessing conditions. The systems and methods for slurry hydroconversion can include the use of a configuration that can allow for improved separation of catalyst particles from the slurry hydroprocessing effluent. In addition to allowing for improved catalyst recycle, an amount of fines in the slurry hydroconversion effluent can be reduced or minimized. This can facilitate further processing or handling of any “pitch” generated during the slurry hydroconversion. The systems and methods for solvent assisted hydroprocessing can include processing of a heavy oil feed in conjunction with a high solvency dispersive power crude.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: September 17, 2019
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Benjamin S. Umansky, Himanshu Gupta, John D. Nelson, Cindy J. Hughart, Jane C. Cheng, Steven W. Levine, Stephen H. Brown, Todd P. Marut, David C. Dankworth, Stuart L. Soled, Thomas F. Degnan, Jr., Robert J. Falkiner, Mohsen N. Harandi, Juan D. Henao, Lei Zhang, Chuansheng Bai, Richard C. Dougherty
  • Publication number: 20180002617
    Abstract: Systems and methods are provided for hydroconversion of a heavy oil feed under slurry hydroprocessing conditions and/or solvent assisted hydroprocessing conditions. The systems and methods for slurry hydroconversion can include the use of a configuration that can allow for improved separation of catalyst particles from the slurry hydroprocessing effluent. In addition to allowing for improved catalyst recycle, an amount of fines in the slurry hydroconversion effluent can be reduced or minimized. This can facilitate further processing or handling of any “pitch” generated during the slurry hydroconversion. The systems and methods for solvent assisted hydroprocessing can include processing of a heavy oil feed in conjunction with a high solvency dispersive power crude.
    Type: Application
    Filed: June 19, 2017
    Publication date: January 4, 2018
    Inventors: Benjamin S. UMANSKY, Himanshu GUPTA, John D. NELSON, Cindy J. HUGHART, Jane C. CHENG, Steven W. LEVINE, Stephen H. BROWN, Todd P. MARUT, David C. DANKWORTH, Stuart L. SOLED, Thomas F. DEGNAN, JR., Robert J. FALKINER, Mohsen N. HARANDI, Juan D. HENAO, Lei ZHANG, Chuansheng BAI, Richard C. DOUGHERTY
  • Publication number: 20150101406
    Abstract: In various aspects, methods and systems are provided for monitoring catalyst bed levels using multiple sensors that are temporarily installed in a reactor during catalyst loading. The multiple sensors are able to take distance measurements at substantially the same time and at predetermined time intervals so as to provide a catalyst time profile. The catalyst time profile allows an operator monitor catalyst levels during and after catalyst loading. Once catalyst loading is completed, the multiple sensors are removed from the reactor.
    Type: Application
    Filed: September 15, 2014
    Publication date: April 16, 2015
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: YI EN HUANG, David C. Dankworth, Keith Wilson, Manuel S. Alvarez, Rathna P. Davuluri, Jeffrey W. Frederick, Bryan A. Patel
  • Patent number: 6623621
    Abstract: A process for upgrading a liquid petroleum or chemical stream wherein said stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas, in at least one reaction zone. The temperature of at least a portion of the liquid stream in the reactor is used to control the flooding characteristics of the reactor.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: September 23, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Larry L. Iaccino, Russell D. Sellen, David C. Dankworth, Edward S. Ellis, Jeffrey W. Frederick, Ramesh Gupta, James J. Schorfheide, Louis A. Curcio, Jr.
  • Patent number: 6054041
    Abstract: A hydroprocessing process includes two cocurrent flow liquid reaction stages and one vapor stage, in which feed components are catalytically hydroprocessed by reacting with hydrogen. The liquid stages both produce a liquid and a hydrogen-rich vapor effluent, with most of the hydroprocessing accomplished in the first stage. The first stage vapor is also hydroprocessed. The hydroprocessed vapor and second stage vapor are cooled to condense and recover additional product liquid and produce an uncondensed hydrogen-rich vapor. After cleanup to remove contaminants, the hydrogen-rich vapor is recycled back into the first stage as treat gas. Fresh hydrogen is introduced into the second stage. This is useful for hydrotreating heteroatom-containing hydrocarbons.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: April 25, 2000
    Assignee: Exxon Research and Engineering Co.
    Inventors: Edward S. Ellis, William Ernest Lewis, David C. Dankworth, Ramesh Gupta
  • Patent number: 6037445
    Abstract: A continuous process for functionalizing polymers is disclosed, wherein (A) a liquid comprising the polymer and a gas comprising a functionalizing agent are continuously introduced into a dispersing zone operated in laminar flow with high intensity mixing of the liquid and the gas under functionalization conditions, wherein the mixing is conducted for a period of the dispersing zone residence time at a shear rate effective to form a stable gas-liquid dispersion in which the gas is substantially dissolved or dispersed in the liquid for functionalization, and wherein the shear rate is less than about 5 s.sup.-1 for no more than about 30% of the residence time; (B) the gas-liquid dispersion is continuously passed to a blending zone operated in laminar flow with low intensity mixing under functionalization conditions, wherein the mixing is conducted at a shear rate effective to further dissolve the gas into the liquid for further functionalization; and (C) continuously recovering functionalized polymer.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: March 14, 2000
    Assignees: Exxon Chemical Patents, Inc., Koch-Glitsch, Inc.
    Inventors: David C. Dankworth, Chris F. Meyer, William B. Eckstrom, Ramesh R. Hemrajani, Salvatore Rea, Jon E. Stanat
  • Patent number: 6007787
    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
  • Patent number: 5985131
    Abstract: A process for upgrading a liquid petroleum or chemical stream wherein said stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas, in at least one reaction zone. The reaction vessel used in the practice of the present invention contains vapor and optionally liquid passageway means to bypass one or more catalyst beds. This permits more stable and efficient reaction vessel operation.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: November 16, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Gupta, David C. Dankworth, Dennis D. Fleming, Edward S. Ellis, James J. Schorfheide
  • Patent number: 5942197
    Abstract: A reactor is provided for reacting a liquid with a treat gas in the presence of a catalyst, the reactor comprising a continuous wall enclosing a first reaction zone, wherein the first reaction zone includes a catalyst for causing a desired reaction between the liquid and the treat gas; a liquid inlet above the first reaction zone for allowing a portion of the liquid to enter the reactor; a gas inlet below the first reaction zone for allowing a portion of the treat gas to enter the reactor; a liquid outlet below the first reaction zone for allowing a reacted portion of the liquid to exit the reactor; a gas outlet above the first reaction zone for allowing a portion of the treat gas to exit the reactor; and a gas bypass device in the first reaction zone for allowing a portion of the treat gas to bypass a portion of the first reaction zone, the gas bypass device including a gas bypass regulating device for regulating the amount of treat gas which bypasses the first reaction zone.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 24, 1999
    Assignee: Exxon Research and Engineering Co
    Inventors: Ramesh Gupta, Jeffrey W. Frederick, Edward S. Ellis, David C. Dankworth, Dimitrios M. Tsangaris
  • Patent number: 5939031
    Abstract: A reactor is provided for reacting a liquid with a treat gas in the presence of a catalyst, the reactor comprising a continuous wall enclosing a first reaction zone, wherein the first reaction zone includes a catalyst for causing a desired reaction between the liquid and the treat gas; a liquid inlet above the first reaction zone for allowing an unreacted portion of the liquid to enter the reactor; a gas inlet below the first reaction zone for allowing an unreacted portion of the treat gas to enter the reactor; a liquid outlet below the first reaction zone for allowing a reacted portion of the liquid to exit the reactor; a gas outlet above the first reaction zone for allowing a reacted portion of the treat gas to exit the reactor; and a liquid bypass device in the first reaction zone for allowing a portion of the liquid to bypass a portion of the first reaction zone, the liquid bypass device including a liquid bypass regulating device for regulating the amount of liquid which bypasses the first reaction zone.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 17, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: Edward S. Ellis, Jeffrey W. Frederick, Ramesh Gupta, David C. Dankworth, Dimitrios M. Tsangaris
  • Patent number: 5936041
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: August 10, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes
  • Patent number: 5872084
    Abstract: A Koch functionalized product, which is the reaction product of at least one hydrocarbon with carbon monoxide and a nucleophilic trapping agent, is derivatized with a heavy polyamine and a second amine. The hydrocarbon is a hydrocarbon compound or a hydrocarbon polymer. A heavy polyamine is a mixture of polyamines containing small amounts of lower polyamine oligomers such as tetraethylene pentamine and pentaethylenehexamine and containing primarily oligomers with more than 6 nitrogens and more extensive branching. Rubber seals embrittlement is reduced or minimized.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: February 16, 1999
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Jacob I. Emert, Joseph V. Cusumano, David C. Dankworth, William D. Diana, William B. Eckstrom, Keith R. Gorda, Antonio Gutierrez, Jon E. Stanat, Warren A. Thaler, Stephen Zushma
  • Patent number: 5854186
    Abstract: A Koch functionalized product, which is the reaction product of at least one hydrocarbon with carbon monoxide and a nucleophilic trapping agent is derivatized with a heavy polyamine. A heavy polyamine is a mixture of polyamines comprising small amounts of lower polyamine oligomers such as tetraethylene pentamine and pentahexamine but primarily oligomers with more than 6 nitrogens and more extensive branching.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: December 29, 1998
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Joseph V. Cusumano, David C. Dankworth, William D. Diana, William B. Eckstrom, Jacob I. Emert, Keith R. Gorda, Antonio Gutierrez, Jon E. Stanat, Warren A. Thaler, Stephen Zushma
  • Patent number: 5804667
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 8, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes
  • Patent number: 5783735
    Abstract: A process for preparing polymeric amides is disclosed. The process comprises sequentially reacting a hydrocarbon polymer functionalized (e.g., via the Koch reaction) to contain acid, ester, thioacid and/or thioester groups with a heavy polyamine to form a partially derivatized product in which at least about 85% of the functional groups are converted to heavy (thio)amide groups, and then reacting the partially derivatized product with an excess of light amine to complete the derivatization by converting substantially all of the remaining functional groups to light (thio)amide groups. Products of the foregoing process are also disclosed, which products are useful as additives in fuels and in lubricants.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 21, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jacob I. Emert, Joseph V. Cusumano, David C. Dankworth, William D. Diana, William B. Eckstrom, Keith R. Gorda, Antonio Gutierrez, Jon E. Stanat, Warren A. Thaler, Stephen Zushma
  • Patent number: 5756431
    Abstract: A Koch functionalized product, which is the reaction product of at least one hydrocarbon with carbon monoxide and a nucleophilic trapping agent, is derivatized with a heavy polyamine and a second amine. The hydrocarbon is a hydrocarbon compound or a hydrocarbon polymer. A heavy polyamine is a mixture of polyamines containing small amounts of lower polyamine oligomers such as tetraethylene pentamine and pentaethylenehexamine and containing primarily oligomers with more than 6 nitrogens and more extensive branching. Rubber seals embrittlement is reduced or minimized.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: May 26, 1998
    Assignee: Exxon Chemical Patents Inc
    Inventors: Jacob I. Emert, Joseph V. Cusumano, David C.. Dankworth, William D. Diana, William B. Eckstrom, Keith R. Gorda, Antonio Gutierrez, Jon E. Stanat, Warren A. Thaler, Stephen Zushma