Patents by Inventor Thomas Davidian

Thomas Davidian 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: 20210002393
    Abstract: A solution polymerization process for producing ethylene-based polymer includes introducing ethylene monomer, hydrocarbon solvent, and Ziegler-Natta catalyst into an entrance of a solution polymerization reactor. An ethylene-based polymer is produced by solution polymerizing the ethylene monomer in hydrocarbon solvent. Subsequently, a catalyst deactivator is introduced into the exit of the solution polymerization reactor, thereby producing hydrochloric acid byproduct. The catalyst deactivator includes long chain carboxylate and at least one cation selected from Groups 1, 2, and 12 of the IUPAC periodic table, with the exception of calcium. The catalyst deactivator reduces the effectiveness of the Ziegler-Natta catalyst and neutralizes the hydrochloric acid by forming a chloride salt other than calcium chloride.
    Type: Application
    Filed: March 25, 2019
    Publication date: January 7, 2021
    Applicant: Dow Global Technologies LLC
    Inventors: Evelyn Auyeung, Sean W. Ewart, Daniela Ferrari, Thomas Davidian, Rony Vanspeybroeck
  • Patent number: 10639586
    Abstract: A method and an integrated system for reducing CO2 emissions in industrial processes. The method and integrated system (100) capture carbon dioxide (CO2) gas from a first gas stream (104) with a chemical absorbent to produce a second gas stream (106) having a higher concentration of carbon monoxide (CO) gas and a lower concentration of CO2 gas as compared to first gas stream. The CO gas in the second gas stream is used to produce C5 to C20 hydrocarbons in an exothermic reaction (108) with hydrogen (H2) gas (138). At least a portion of the heat generated in the exothermic reaction is used to regenerate the chemical absorbent with the liberation of the CO2 gas (128) captured from the first gas stream. Heat captured during the exothermic reaction can, optionally, first be used to generate electricity, wherein the heat remaining after generating electricity is used to thermally regenerate the chemical absorbent.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: May 5, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Thomas Davidian, Steven Corthals, Cornelis Biesheuvel, Matthijs Ruitenbeek, Andrzej Malek, Peter E. Groenendijk, Garmt R. Meima
  • Patent number: 10519087
    Abstract: The present invention provides methods for making propanal in a reaction comprising the oxidative coupling of methane (OCM) and oxygen as a reactant stream in a gas phase reaction, preferably in the presence of water or steam, to form ethylene, ethane, carbon dioxide (CO2), water and syngas (CO and H2) in a first reactor as an ethylene stream, and then forming propanal in a second reactor by feeding to the second reactor the ethylene stream with the syngas from the first reactor in the gas phase and hydroformylating in the presence of a catalyst for a water shift reaction. In the method, the ratio of H2 to CO in the syngas is maintained by either co-feeding steam into the first reactor or the second reactor to generate additional H2 in the syngas, or by forming CO in the second reactor from the water shift reaction by feeding the CO2 from the ethylene stream into the second reactor.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: December 31, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Steven L. F. Corthals, Thomas Davidian, Gerolamo Budroni, Peter E. Groenendijk
  • Publication number: 20190292122
    Abstract: The present invention provides methods for making propanal in a reaction comprising the oxidative coupling of methane (OCM) and oxygen as a reactant stream in a gas phase reaction, preferably in the presence of water or steam, to form ethylene, ethane, carbon dioxide (CO2), water and syngas (CO and H2) in a first reactor as an ethylene stream, and then forming propanal in a second reactor by feeding to the second reactor the ethylene stream with the syngas from the first reactor in the gas phase and hydroformylating in the presence of a catalyst for a water shift reaction. In the method, the ratio of H2 to CO in the syngas is maintained by either co-feeding steam into the first reactor or the second reactor to generate additional H2 in the syngas, or by forming CO in the second reactor from the water shift reaction by feeding the CO2 from the ethylene stream into the second reactor.
    Type: Application
    Filed: June 13, 2017
    Publication date: September 26, 2019
    Inventors: Steven L.F. Corthals, Thomas Davidian, Gerolamo Budroni, Peter E. Groenendijk
  • Publication number: 20180326352
    Abstract: A method and an integrated system for reducing CO2 emissions in industrial processes. The method and integrated system (100) capture carbon dioxide (CO2) gas from a first gas stream (104) with a chemical absorbent to produce a second gas stream (106) having a higher concentration of carbon monoxide (CO) gas and a lower concentration of CO2 gas as compared to first gas stream. The CO gas in the second gas stream is used to produce C5 to C20 hydrocarbons in an exothermic reaction (108) with hydrogen (H2) gas (138). At least a portion of the heat generated in the exothermic reaction is used to regenerate the chemical absorbent with the liberation of the CO2 gas (128) captured from the first gas stream. Heat captured during the exothermic reaction can, optionally, first be used to generate electricity, wherein the heat remaining after generating electricity is used to thermally regenerate the chemical absorbent.
    Type: Application
    Filed: November 14, 2016
    Publication date: November 15, 2018
    Applicant: Dow Global Technologies LLC
    Inventors: Thomas Davidian, Steven Corthals, Cornelis Biesheuvel, Matthijs Ruitenbeek, Andrzej Malek, Peter E. Groenendijk, Garmt R. Meima
  • Patent number: 9919981
    Abstract: A feedstream comprising hydrogen and a gas selected from carbon monoxide, carbon dioxide, or a combination thereof is converted to a product mixture containing a combination of saturated and unsaturated two carbon atom and three carbon atom hydrocarbons via contact with a mixed catalyst comprising a mixed metal oxide catalyst selected from a copper oxide, copper oxide/zinc oxide, copper oxide/alumina, copper oxide/zinc oxide/alumina catalyst, a zinc oxide/chromium oxide catalyst, or a combination thereof, in admixture with a molecular sieve catalyst having a CHA, AEI, AEL, AFI, BEA, or DDR framework type, or a combination of such molecular sieves. Exemplary molecular sieve catalysts include SAPO-34, SAPO-18, SAPO-5, and Beta. Advantages include reduced production of C1 hydrocarbons, C4 and higher hydrocarbons, or both; long catalyst lifetimes; desirable conversions; and desirable proportions of C2 and C3 paraffins.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: March 20, 2018
    Assignee: Dow Global Technologies LLC
    Inventors: Adam Chojecki, Davy Nieskens, Thomas Davidian, Peter E. Groenendijk, Matthijs Ruitenbeek, Barry B. Fish, Max M. Tirtowidjojo, Garmt R. Meima
  • Patent number: 9833774
    Abstract: Preparation of a catalyst suitable for use in Fischer-Tropsch Synthesis reactions using a two step process in which the steps may be performed in either order. In step a), impregnate an iron carboxylate metal organic framework selected from a group consisting of iron-1,3,5-benzenetricarboxylate (Fe-(BTC), Basolite™ F-300 and/or MIL-100 (Fe)), iron-1,4 benzenedicarboxylate (MIL-101(Fe)), iron fumarate (MIL-88 A (Fe)), iron-1,4 benzenedicarboxylate (MIL-53 (Fe)), iron-1,4 benzenedicarboxylate (MIL-68 (Fe)) or iron azobenzenetetracarboxylate (MIL-127 (Fe)) with a solution of a promoter element selected from alkali metals and alkaline earth metals. In step b) thermally decompose the iron carboxylate metal organic framework under an inert gaseous atmosphere to yield a catalyst that is a porous carbon matrix having embedded therein a plurality of discrete aliquots of iron carbide.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: December 5, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Vera P. Santos Castro, Adam Chojecki, Garmt R. Meima, Adrianus Koeken, Matthijs Ruitenbeek, Thomas Davidian, Gascon Jorge, Michiel Makkee, Freek Kapteijn, Tim A. Wezendonk
  • Patent number: 9822313
    Abstract: Form liquid product stream that has a C13 to C20 hydrocarbon content of less than 5.0 wt % based upon a total weight of the liquid product stream via a process that includes contacting synthesis gas with a sulfurized Zeolite Socony Mobil-5 catalyst. The sulfurized Zeolite Socony Mobil-5 catalyst can include ZSM-5, cobalt, an alkali metal, sulfur, and a reduction promoter.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: November 21, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Andrzej Malek, Thomas Davidian
  • Publication number: 20170283708
    Abstract: Form liquid product stream that has a C13 to C20 hydrocarbon content of less than 5.0 wt % based upon a total weight of the liquid product stream via a process that includes contacting synthesis gas with a sulfurized Zeolite Socony Mobil-5 catalyst. The sulfurized Zeolite Socony Mobil-5 catalyst can include ZSM-5, cobalt, an alkali metal, sulfur, and a reduction promoter.
    Type: Application
    Filed: September 21, 2015
    Publication date: October 5, 2017
    Applicant: Dow Global Technologies LLC
    Inventors: Andrzej Malek, Thomas Davidian
  • Publication number: 20170210679
    Abstract: A feedstream comprising hydrogen and a gas selected from carbon monoxide, carbon dioxide, or a combination thereof is converted to a product mixture containing a combination of saturated and unsaturated two carbon atom and three carbon atom hydrocarbons via contact with a mixed catalyst comprising a mixed metal oxide catalyst selected from a copper oxide, copper oxide/zinc oxide, copper oxide/alumina, copper oxide/zinc oxide/alumina catalyst, a zinc oxide/chromium oxide catalyst, or a combination thereof, in admixture with a molecular sieve catalyst having a CHA, AEI, AEL, AFI, BEA, or DDR framework type, or a combination of such molecular sieves. Exemplary molecular sieve catalysts include SAPO-34, SAPO-18, SAPO-5, and Beta. Advantages include reduced production of C1 hydrocarbons, C4 and higher hydrocarbons, or both; long catalyst lifetimes; desirable conversions; and desirable proportions of C2 and C3 paraffins.
    Type: Application
    Filed: July 8, 2015
    Publication date: July 27, 2017
    Applicant: Dow Global Technologies LLC
    Inventors: Adam CHOJECKI, Davy NIESKENS, Thomas DAVIDIAN, Peter E. GROENENDIJK, Matthijs RUITENBEEK, Barry B. FISH, Max M. TIRTOWIDJOJO, Garmt R. MEIMA
  • Patent number: 9694345
    Abstract: A catalyst composition and process for preparing it and for using it to enhance the selectivity to light (C2 to C3) olefins in a Fischer-Tropsch conversion of synthesis gas is disclosed. The catalyst composition is an iron-based catalyst on an yttria/zirconia support. In a Fischer-Tropsch reaction the selectivity to ethylene may be enhanced by at least 20 mole percent and to propylene by at least 4 mole percent, in comparison with use of an otherwise identical catalyst that is free of yttria, in an otherwise identical Fischer-Tropsch reaction.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: July 4, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Thomas Davidian, Matthijs Ruitenbeek, Adam Chojecki, Adrianus Koeken
  • Publication number: 20170173565
    Abstract: Preparation of a catalyst suitable for use in Fischer-Tropsch Synthesis reactions using a two step process in which the steps may be performed in either order. In step a), impregnate an iron carboxylate metal organic framework selected from a group consisting of iron-1,3,5-benzenetricarboxylate (Fe-(BTC), Basolite™ F-300 and/or MIL-100 (Fe)), iron-1,4 benzenedicarboxylate (MIL-101(Fe)), iron fumarate (MIL-88 A (Fe)), iron-1,4 benzenedicarboxylate (MIL-53 (Fe)), iron-1,4 benzenedicarboxylate (MIL-68 (Fe)) or iron azobenzenetetracarboxylate (MIL-127 (Fe)) with a solution of a promoter element selected from alkali metals and alkaline earth metals. In step b) thermally decompose the iron carboxylate metal organic framework under an inert gaseous atmosphere to yield a catalyst that is a porous carbon matrix having embedded therein a plurality of discrete aliquots of iron carbide.
    Type: Application
    Filed: May 14, 2015
    Publication date: June 22, 2017
    Inventors: Vera P. Santos Castro, Adam Chojecki, Garmt R. Meima, Adrianus Koeken, Matthijs Ruitenbeek, Thomas Davidian, Gascon Jorge, Michiel Makkee, Freek Kapteijn, Tim A. Wezendonk
  • Patent number: 9643164
    Abstract: A Fischer-Tropsch catalyst, useful for conversion of synthesis gas to olefins, is prepared from a catalyst precursor composition including iron oxide and an alkali metal on a substantially inert support, and then treated by a process including as ordered steps (1) reduction in a hydrogen-containing atmosphere at a pressure of 0.1 to 1 M Pa and a temperature from 280° C. to 450° C.; (2) carburization in a carbon monoxide-containing atmosphere at a pressure from 0.1 to 1 M Pa and a temperature from 200° C. to less than 340° C.; and (3) conditioning in a hydrogen- and carbon monoxide-containing atmosphere at a pressure from 0.1 to 2 MPa and a temperature from 280° C. to 340° C.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: May 9, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Thomas Davidian, Matthijs Ruitenbeek, Adrianus Koeken, Marjolein Vos, Marco F. Wielemaker
  • Publication number: 20160121311
    Abstract: A Fischer-Tropsch catalyst, useful for conversion of synthesis gas to olefins, is prepared from a catalyst precursor composition including iron oxide and an alkali metal on a substantially inert support, and then treated by a process including as ordered steps (1) reduction in a hydrogen-containing atmosphere at a pressure of 0.1 to 1 M Pa and a temperature from 280° C. to 450° C.; (2) carburization in a carbon monoxide-containing atmosphere at a pressure from 0.1 to 1 M Pa and a temperature from 200° C. to less than 340° C.; and (3) conditioning in a hydrogen- and carbon monoxide-containing atmosphere at a pressure from 0.1 to 2 MPa and a temperature from 280° C. to 340° C.
    Type: Application
    Filed: June 25, 2014
    Publication date: May 5, 2016
    Applicant: Dow Global Technologies LLC
    Inventors: Thomas Davidian, Matthijs Ruitenbeek, Adrianus Koeken, Marjolein Vos, Marco F. Wielemaker
  • Publication number: 20160107144
    Abstract: A catalyst composition and process for preparing it and for using it to enhance the selectivity to light (C2 to C3) olefins in a Fischer-Tropsch conversion of synthesis gas is disclosed. The catalyst composition is an iron-based catalyst on an yttria/zirconia support. In a Fischer-Tropsch reaction the selectivity to ethylene may be enhanced by at least 20 mole percent and to propylene by at least 4 mole percent, in comparison with use of an otherwise identical catalyst that is free of yttria, in an otherwise identical Fischer-Tropsch reaction.
    Type: Application
    Filed: June 25, 2014
    Publication date: April 21, 2016
    Inventors: Thomas Davidian, Matthijs Ruitenbeek, Adam Chojecki, Adrianus Koeken