Patents by Inventor Joseph G. Duff

Joseph G. Duff 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: 10544071
    Abstract: The process to recover heat in oxidative dehydrogenation of butene to butadiene is presented. The process utilizes heat recovered in oxidative dehydrogenation of butene to butadiene to generate steam. The process utilizes the circulated water stream generated in oxidative dehydrogenation of butene to butadiene for steam generation. A feedstream comprising butene is mixed with steam and preheated air at the inlet of the oxidative dehydrogenation reactor.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: January 28, 2020
    Assignees: UOP LLC, TPC Group LLC
    Inventors: John J. Senetar, Joseph G. Duff, Jillian M. Horn, Clifford A. Maat, Michael O. Nutt
  • Patent number: 10538466
    Abstract: A process is presented for the production of butadienes. The process includes the separation of oxygenates from the product stream from an oxidative dehydrogenation reactor. The process includes quenching the product stream and solvent and oxygenates from the product stream. The oxygenates are stripped from the solvent with an inert gas to reduce the energy consumption of the process, and the solvent is recycled and reused in the process.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: January 21, 2020
    Assignees: UOP LLC, TPC Group, LLC
    Inventors: John J. Senetar, Jeannie M. Blommel, Charles P. Luebke, Dana K. Sullivan, Joseph G. Duff, Jillian M. Horn, Clifford A. Maat, Michael O. Nutt
  • Publication number: 20180258015
    Abstract: A process is presented for the production of butadienes. The process includes the separation of oxygenates from the product stream from an oxidative dehydrogenation reactor. The process includes quenching the product stream and solvent and oxygenates from the product stream. The oxygenates are stripped from the solvent with an inert gas to reduce the energy consumption of the process, and the solvent is recycled and reused in the process.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 13, 2018
    Inventors: John J. Senetar, Jeannie M. Blommel, Charles P. Luebke, Dana K. Sullivan, Joseph G. Duff, Jillian M. Horn, Clifford A. Maat, Michael O. Nutt
  • Publication number: 20180251412
    Abstract: The process to recover heat in oxidative dehydrogenation of butene to butadiene is presented. The process utilizes heat recovered in oxidative dehydrogenation of butene to butadiene to generate steam. The process utilizes the circulated water stream generated in oxidative dehydrogenation of butene to butadiene for steam generation. A feedstream comprising butene is mixed with steam and preheated air at the inlet of the oxidative dehydrogenation reactor.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 6, 2018
    Inventors: John J. Senetar, Joseph G. Duff, Jillian M. Horn, Clifford A. Maat, Michael O. Nutt
  • Patent number: 10052608
    Abstract: An apparatus for producing butadiene by way of oxidative dehydrogenation of a butene-rich feed stream includes: (a) a reactor adapted for receiving said butene-rich feed stream and converting butenes to butadiene, thereby providing a butadiene enriched product effluent stream; (b) a superheater coupled to the reactor to receive the butadiene enriched product effluent stream from the reactor as well as being configured to receive reactor feed, said superheater transferring sensible heat from the butadiene enriched product effluent stream to reactor feed and (c) a first feed-vaporizer coupled to the superheater to receive the butadiene enriched product effluent stream as it exits the superheater and to transfer sensible heat from the butadiene enriched product effluent stream to reactor feed. Also provided are (d) a second feed vaporizer; (e) a purification train; and (f) a thermal oxidizer.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: August 21, 2018
    Assignee: TPC Group LLC
    Inventors: Liana Caciula, Joseph G. Duff, Elizabeth Ballard, Sirisha Chada, Mark J. Potter
  • Patent number: 10035740
    Abstract: A method of oxidatively dehydrogenating a dehydrogenation reactant includes providing a first gaseous feed stream to a first adiabatic, catalytic reaction zone with less than a stoichiometric amount of oxygen and superheated steam, oxidatively dehydrogenating dehydrogenation reactant in said first adiabatic, catalytic reaction zone and subsequently cooling the effluent, adding additional oxygen and reacting the effluent stream in at least one subsequent adiabatic reaction zone. The dehydrogenation system enables higher conversion and yield per pass and in some cases greatly reduces steam usage and energy costs. In a preferred integrated process, ethylene is converted to n-butene which is then oxidatively dehydrogenated to butadiene.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: July 31, 2018
    Assignee: TPC Group LLC
    Inventors: Clifford Alan Maat, Joseph G. Duff, Liana Caciula, Michael O. Nutt, Robert Z. Confair, Mark P. Kaminsky, Jillian M. Horn, Gus K. Georgeton
  • Patent number: 10035136
    Abstract: The present invention discloses a process to treat a ferrite based catalyst useful in the oxidative dehydrogenation of monololefins and diolefins which process includes a preheat step prior to use of the catalyst in the OXO-D reactor. The catalyst is preferably a zinc ferrite catalyst for the production of butadiene. It has been observed that substantially no nitrogen oxide emissions result from the use of this treated catalyst in the reactor unit during the oxidative dehydrogenation reaction.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: July 31, 2018
    Assignee: TPC Group LLC
    Inventors: Joseph G. Duff, Jillian M. Horn, Michael O. Nutt, George S. Pappas
  • Patent number: 10035741
    Abstract: A method of oxidatively dehydrogenating a n-butenes to butadiene includes oxidatively dehydrogenating dehydrogenation reactant in a first adiabatic, catalytic reaction zone to provide a first-stage effluent stream enriched in butadiene at a first-stage effluent temperature above the first-stage inlet temperature, cooling the first-stage effluent stream in a first heat transfer zone to a second-stage inlet temperature lower than said first-stage effluent temperature to provide a second gaseous feed stream comprising superheated steam, n-butene and butadiene, wherein the second stage inlet temperature is lower than said first stage effluent temperature and oxidatively dehydrogenating n-butene in the second stream to provide a product stream further enriched in butadiene at a second stage effluent temperature above said second-stage inlet temperature. The first reaction zone temperature rise and the second reaction zone temperature rise are at least 200° F. (111° C.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: July 31, 2018
    Assignee: TPC Group LLC
    Inventors: Jillian M. Horn, Joseph G. Duff, Clifford A. Maat, Robert P. Adams, John J. Senetar
  • Patent number: 9908097
    Abstract: Butadiene is made from a butene rich feed by passing a superheated butene rich feed including superheated steam and oxygen at a temperature of at least about 343° C. (650° F.) over a catalyst bed having a depth of over about 69 cm (27 inches) of granules of ferritic oxidative dehydrogenation catalyst. Inlet conditions being controlled such that the oxidative dehydrogenation reactions initially occur in the lower most layers of catalyst. Process control includes monitoring the temperature throughout the bed and increasing the inlet temperature in response to a drop in the temperature in the active layer, when the active layer of oxidative dehydrogenation catalyst begins to become deactivated so that the reaction zone moves upwardly in the oxidative dehydrogenation bed.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: March 6, 2018
    Assignee: TPC GROUP LLC
    Inventors: Liana Caciula, Joseph G. Duff, Sirisha Chada, Elizabeth Ballard, Cecil G. McFarland
  • Patent number: 9902669
    Abstract: Oxidative dehydrogenation includes: (a) providing a gaseous feed stream to a catalytic reactor, the feed stream comprising a dehydrogenation reactant, oxygen, superheated steam, hydrocarbon moderator gas and optionally nitrogen, wherein the molar ratio of moderator gas to oxygen in feed stream is typically from 4:1 to 1:1 and the molar ratio of oxygen to nitrogen in the feed stream is at least 2; (b) oxidatively dehydrogenating the reactant in the reactor to provide a dehydrogenated product enriched effluent product stream; and (c) recovering dehydrogenated product from the effluent product stream. One preferred embodiment is a process for making butadiene including dimerizing ethylene to n-butene in a homogeneous reaction medium to provide a hydrocarbonaceous n-butene rich feed stream and oxidatively dehydrogenating the n-butene so formed.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: February 27, 2018
    Assignee: TPC GROUP LLC
    Inventors: Liana Caciula, Clifford A. Maat, Mark P. Kaminsky, Michael O. Nutt, Jillian M. Horn, Joseph G. Duff
  • Patent number: 9861976
    Abstract: Disclosed herein is a process for the regeneration of oxidative dehydrogenation (OXO-D) catalyst in an alternate or separate regeneration reactor by employing controlled steam:air and time/pressure/temperature conditions. The process avoids destruction of the catalyst, and wear/tear on an OXO-D reactor. The regenerated catalyst is an iron based oxide catalyst which can be zinc or zinc-free. The iron based oxide catalyst is regenerated in the regeneration reactor by feeding an air/steam stream over a set amount of time, preferably about 6 days to yield a regenerated OXO-D catalyst. The regenerated catalyst is activated and re-utilized to produce butadienes.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: January 9, 2018
    Assignee: TPC Group LLC
    Inventors: Joseph G. Duff, Jillian M. Horn
  • Publication number: 20170252738
    Abstract: Disclosed herein is a process for the regeneration of oxidative dehydrogenation (OXO-D) catalyst in an alternate or separate regeneration reactor by employing controlled steam: air and time/pressure/temperature conditions. The process avoids destruction of the catalyst, and wear/tear on an OXO-D reactor. The regenerated catalyst is an iron based oxide catalyst which can be zinc or zinc-free. The iron based oxide catalyst is regenerated in the regeneration reactor by feeding an air/steam stream over a set amount of time, preferably about 6 days to yield a regenerated OXO-D catalyst. The regenerated catalyst is activated and re-utilized to produce butadienes.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 7, 2017
    Inventors: Joseph G. DUFF, Jillian M. HORN
  • Publication number: 20170216811
    Abstract: An apparatus for producing butadiene by way of oxidative dehydrogenation of a butane-rich feed stream includes: (a) a reactor adapted for receiving said butane-rich feed stream and converting butenes to butadiene by oxidative dehydrogenation, thereby providing a butadiene enriched product effluent stream which exits the reactor at an elevated temperature; (b) a superheater coupled to the reactor to receive the butadiene enriched product effluent stream from the reactor at elevated temperature as well as being configured to receive reactor feed, said superheater being adapted to transfer sensible heat from the butadiene enriched product effluent stream to reactor feed and provide superheated feed to the reactor and (c) a first feed vaporizer coupled to the superheater to receive the butadiene enriched product effluent stream as it exits the superheater and to transfer sensible heat from the butadiene enriched product effluent stream to reactor feed.
    Type: Application
    Filed: April 11, 2017
    Publication date: August 3, 2017
    Inventors: Liana CACIULA, Joseph G. DUFF, Elizabeth BALLARD, Sirisha CHADA, Mark J. POTTER
  • Patent number: 9650316
    Abstract: Butadiene is formed by dehydrogenation of butenes which are mixed with steam and oxygen then converted to butadiene by oxidative dehydrogenation over a ferritic oxide catalyst, wherein the sensible heat in the oxidative dehydrogenation reaction product is utilized along with heat produced by thermal oxidation of low value volatile products formed to reduce energy requirements and CO2 emissions. Sensible heat is utilized at high temperature for purposes of superheating feed and at somewhat lower temperatures for purposes of vaporizing feed at sequential locations in the process.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: May 16, 2017
    Assignee: TPC GROUP LLC
    Inventors: Liana Caciula, Joseph G. Duff, Elizabeth Ballard, Sirisha Chada, Mark J. Potter
  • Publication number: 20170036195
    Abstract: The present invention discloses a process to treat a ferrite based catalyst useful in the oxidative dehydrogenation of monololefins and diolefins which process includes a preheat step prior to use of the catalyst in the OXO-D reactor. The catalyst is preferably a zinc ferrite catalyst for the production of butadiene. It has been observed that substantially no nitrogen oxide emissions result from the use of this treated catalyst in the reactor unit during the oxidative dehydrogenation reaction.
    Type: Application
    Filed: March 25, 2015
    Publication date: February 9, 2017
    Inventors: Joseph G. Duff, Jillian M. Horn, Michael O. Nutt, George S. Pappas
  • Publication number: 20160368840
    Abstract: A method of oxidatively dehydrogenating a n-butenes to butadiene includes oxidatively dehydrogenating dehydrogenation reactant in a first adiabatic, catalytic reaction zone to provide a first-stage effluent stream enriched in butadiene at a first-stage effluent temperature above the first-stage inlet temperature, cooling the first-stage effluent stream in a first heat transfer zone to a second-stage inlet temperature lower than said first-stage effluent temperature to provide a second gaseous feed stream comprising superheated steam, n-butene and butadiene, wherein the second stage inlet temperature is lower than said first stage effluent temperature and oxidatively dehydrogenating n-butene in the second stream to provide a product stream further enriched in butadiene at a second stage effluent temperature above said second-stage inlet temperature. The first reaction zone temperature rise and the second reaction zone temperature rise are at least 200° F. (111° C.
    Type: Application
    Filed: August 29, 2016
    Publication date: December 22, 2016
    Inventors: Jillian M. Horn, Joseph G. Duff, Clifford A. Maat, Robert P. Adams, John J. Senetar
  • Patent number: 9505682
    Abstract: A method of producing butadiene includes: (1) dimerizing ethylene to butene followed by (2) oxidatively dehydrogenating the butene to butadiene and (3) recovering the butadiene by (i) absorbing the product with a hydrocarbon absorber oil and (ii) stripping a crude product stream from the absorber oil. The absorber oil is selected so as to be effective to sequester ethylene dimerization-derived impurities from the system.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: November 29, 2016
    Assignee: TPC GROUP LLC
    Inventors: Joseph G. Duff, Clifford A. Maat, Michael O. Nutt, Mark P Kaminsky
  • Patent number: 9353025
    Abstract: The present discloses a process and catalyst therefor to selectively remove acetylenes from gaseous streams in the vapor phase. The process is particularly suitable for high yield recovery of olefinic hydrocarbons from gaseous streams in refinery processes.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: May 31, 2016
    Assignee: TPC GROUP LLC
    Inventors: Joseph G. Duff, Cecil G. McFarland
  • Publication number: 20160023963
    Abstract: A method of oxidatively dehydrogenating a dehydrogenation reactant includes providing a first gaseous feed stream to a first adiabatic, catalytic reaction zone with less than a stoichiometric amount of oxygen and superheated steam, oxidatively dehydrogenating dehydrogenation reactant in said first adiabatic, catalytic reaction zone and subsequently cooling the effluent, adding additional oxygen and reacting the effluent stream in at least one subsequent adiabatic reaction zone. The deydrogenation system enables higher conversion and yield per pass and in some cases greatly reduces steam usage and energy costs. In a preferred integrated process, ethylene is converted to n-butene which is then oxidatively dehydrogenated to butadiene.
    Type: Application
    Filed: March 7, 2014
    Publication date: January 28, 2016
    Inventors: Clifford Alan Maat, Joseph G. Duff, Liana Caciula, Michael O. Nutt, Robert Z. Confair, Mark P. Kaminsky, Jillian M. Horn, Gus K. Georgeton
  • Publication number: 20160002126
    Abstract: Oxidative dehydrogenation includes: (a) providing a gaseous feed stream to a catalytic reactor, the feed stream comprising a dehydrogenation reactant, oxygen, superheated steam, hydrocarbon moderator gas and optionally nitrogen, wherein the molar ratio of moderator gas to oxygen in feed stream is typically from 4:1 to 1:1 and the molar ratio of oxygen to nitrogen in the feed stream is at least 2; (b) oxidatively dehydrogenating the reactant in the reactor to provide a dehydrogenated product enriched effluent product stream; and (c) recovering dehydrogenated product from the effluent product stream. One preferred embodiment is a process for making butadiene including dimerizing ethylene to n-butene in a homogeneous reaction medium to provide a hydrocarbonaceous n-butene rich feed stream and oxidatively dehydrogenating the n-butene so formed.
    Type: Application
    Filed: March 7, 2014
    Publication date: January 7, 2016
    Applicant: TPC Group LLC
    Inventors: Liana Caciula, Clifford A. Maat, Mark P. Kaminsky, Michael O. Nutt, Jillian M. Horn, Joseph G. Duff