Patents by Inventor Marc L. DeChellis

Marc L. DeChellis 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).

  • Patent number: 11117980
    Abstract: In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: September 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ryan W. Impelman, Richard J. Stolz, Marc L. DeChellis, David J. Sandell, Gerardo Corona
  • Publication number: 20210189023
    Abstract: In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.
    Type: Application
    Filed: October 15, 2018
    Publication date: June 24, 2021
    Inventors: Ryan W. Impelman, Richard J. StoIz, Marc L. DeChellis, David J. SandeII, Gerardo Corona
  • Publication number: 20200291149
    Abstract: A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.
    Type: Application
    Filed: February 7, 2018
    Publication date: September 17, 2020
    Inventors: Corrine L. Brandl, William A. Lamberti, Charles R. Buhler, Judson S. Clements, Harry W. Deckman, Joseph Moebus, Marc L. DeChellis
  • Patent number: 8433443
    Abstract: Generally, a method of monitoring a polymerization reaction in a fluid bed reactor to generate, in on-line fashion, data indicative of the imminent occurrence of a discontinuity event (for example, sheeting) and optionally also control the reaction to prevent the occurrence of the discontinuity event is provided. Typical embodiments include the steps of generating in on-line fashion at least one of bed static data indicative of static charge in the fluidized bed and carryover static data indicative of carryover static; and generating at least one of temperature data (in on-line fashion using at least one monitored reaction parameter) indicative of a first temperature and acoustic emission data indicative of resin stickiness in the reactor, where the first temperature is indicative of at least one of degree of resin stickiness in the reactor and a characteristic of melting behavior of polymer resin in the reactor in the presence of at least one diluent.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: April 30, 2013
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Ian D. Burdett, Marc L. DeChellis, F. David Hussein, Eric J. Markel, Michael E. Muhle, Richard B. Pannell, Daniel P. Zilker
  • Patent number: 7507780
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of a Ziegler-Natta-type catalyst system and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: March 24, 2009
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Marc L. DeChellis, D. Brett Fischbuch, James M. Farley
  • Publication number: 20080319583
    Abstract: Generally, a method of monitoring a polymerization reaction in a fluid bed reactor to generate, in on-line fashion, data indicative of the imminent occurrence of a discontinuity event (for example, sheeting) and optionally also control the reaction to prevent the occurrence of the discontinuity event is provided. Typical embodiments include the steps of generating in on-line fashion at least one of bed static data indicative of static charge in the fluidized bed and carryover static data indicative of carryover static; and generating at least one of temperature data (in on-line fashion using at least one monitored reaction parameter) indicative of a first temperature and acoustic emission data indicative of resin stickiness in the reactor, where the first temperature is indicative of at least one of degree of resin stickiness in the reactor and a characteristic of melting behavior of polymer resin in the reactor in the presence of at least one diluent.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 25, 2008
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Robert O. Hagerty, Ian D. Burdett, Marc L. DeChellis, F. David Hussein, Eric J. Markel, Michael E. Muhle, Richard B. Pannell, Daniel P. Zilker
  • Patent number: 7300987
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: November 27, 2007
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Marc L. DeChellis, D. Brett Fischbuch, James M. Farley
  • Patent number: 7122607
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: October 17, 2006
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Marc L. DeChellis, D. Brett Fischbuch, James M. Farley
  • Patent number: 6660812
    Abstract: Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is also removed. Olefin is separated from the vent stream, and the olefin is sent to the olefin reaction unit for additional processing.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: December 9, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Keith H. Kuechler, Minquan Cheng, Marc L. DeChellis, David R. Lumgair, Jr., Russell D. Sellen, Gary F. Janda
  • Patent number: 5462999
    Abstract: The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in the presence of a metallocene catalyst in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: October 31, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John R. Griffin, Marc L. DeChellis, Michael E. Muhle
  • Patent number: 5436304
    Abstract: The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: July 25, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John R. Griffin, Marc L. DeChellis
  • Patent number: 5405922
    Abstract: The invention is directed toward polymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins utilizing a bulky ligand transition metal catalyst in a gas phase fluidized bed polymerization reactor operating in condensed mode.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: April 11, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Marc L. DeChellis, John R. Griffin, Michael E. Muhle
  • Patent number: 5371053
    Abstract: A process for deactivating Ziegler-Natta and metallocene catalysts or catalyst systems "such systems are typically used for olefin polymerization". The process includes heating the active catalyst or catalyst system to a temperature sufficient to drive off volatile constituents, and to form complexes and compounds that are non-reactive or less reactive with ambient air than the active catalyst or catalyst system. The process includes steps for safe deactivation including scrubbing to substantially eliminate corrosive compounds, and burning volatile chemicals in a flare.This process essentially eliminates the production of hazardous classification waste from conventional water catalyst deactivation techniques.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: December 6, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios K. Agapiou, Steve K. Ackerman, David M. LaBorde, Marc L. DeChellis
  • Patent number: 5352749
    Abstract: The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: October 4, 1994
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Marc L. DeChellis, John R. Griffin