Patents by Inventor Scott A. Stevenson

Scott A. Stevenson 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: 9475737
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst is a non-acidic germanium zeolite, such as Ge-ZSM-5, on which at least two metals, platinum and at least one other metal selected from Group 7, Group 8, Group 9, Group 10 and tin, are deposited on the germanium zeolite. Examples of the other metal are iridium, rhenium, palladium, ruthenium, rhodium, iron, cobalt and tin. The catalyst is prepared by synthesizing a germanium zeolite; depositing platinum and at least one other metal on the germanium zeolite; and calcining after preparation of the zeolite, before depositing the metals or after depositing the metals. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with a hydrocarbon stream containing alkanes, olefins and mixtures thereof having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: October 25, 2016
    Assignee: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson, Gopalakrishnan G. Juttu
  • Patent number: 9242233
    Abstract: Methods for preparing bound non-acidic germanium zeolite catalysts are disclosed, where the preparation is reproducible and scalable and where the catalysts have similar or the same activity and selectivities of a standard naphtha aromatization catalyst and methods for aromatizing naphtha.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: January 26, 2016
    Assignee: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Ashim K. Ghosh, Scott A. Stevenson, Neeta Kulkarni, Mike Mier, Balamurali K. Nair, Dustin Farmer
  • Patent number: 9233884
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst is a germanium zeolite, such as Ge-ZSM-5, on which at least two metals, platinum and at least one other metal selected from Group 7, Group 8, Group 9, Group 10 and tin, are deposited on the germanium zeolite. Examples of the other metal are iridium, rhenium, palladium, ruthenium, rhodium, iron, cobalt and tin. The catalyst is prepared by synthesizing a germanium zeolite; depositing platinum and at least one other metal on the germanium zeolite; and calcining after preparation of the zeolite, before depositing the metals or after depositing the metals. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with a hydrocarbon stream containing alkanes, olefins and mixtures thereof having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: January 12, 2016
    Assignee: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson, Gopalakrishnan G. Juttu
  • Patent number: 9221723
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst contains a zeolite having germanium and at least one selected from the group consisting of tin and boron incorporated into the zeolite framework and at least one metal selected from Group 10 deposited on the zeolite. The catalyst is prepared by synthesizing a zeolite having germanium and at least one selected from the group consisting of tin and boron incorporated into the zeolite framework; depositing the metal; and calcining after preparation of the zeolite and before or after depositing the metal. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with alkanes having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: December 29, 2015
    Assignee: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Alla K. Khanmamedova, Scott A. Stevenson, Scott F. Mitchell, Dustin B. Farmer, Jim Vartuli
  • Patent number: 9192925
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst contains a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework. At least one Group 10 metal, such as platinum, is deposited on the zeolite. Examples of the elements in the framework are tin, boron, iron or titanium. The catalyst is prepared by synthesizing a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework; depositing the metal; and calcining after preparation of the zeolite and before or after depositing the metal. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with alkanes having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: November 24, 2015
    Assignee: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Scott F. Mitchell, Alla K. Khanmamedova, Scott A. Stevenson, Jim Vartuli
  • Patent number: 8993468
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst is a medium pore germanium zeolite, a germanium aluminophosphate (AlPO) or a germanium silicoaluminophosphate (SAPO). At least one metal selected from Group 10 is deposited on the medium pore zeolite and, optionally on the germanium aluminophosphate (AlPO) or a germanium silicoaluminophosphate (SAPO). The catalyst is prepared by synthesizing a medium pore zeolite, an aluminophosphate (AlPO) or a silicoaluminophosphate (SAPO) with germanium incorporated into the framework and calcining the medium pore germanium zeolite, germanium aluminophosphate (AlPO) or germanium silicoaluminophosphate (SAPO). At least one metal may be deposited on the germanium zeolite, germanium aluminophosphate (AlPO) or a germanium silicoaluminophosphate (SAPO).
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: March 31, 2015
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Alla K. Khanmamedova, Dustin B. Farmer, Scott F. Mitchell, Jim Vartuli
  • Patent number: 8969232
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst contains a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework. At least one Group 10 metal, such as platinum, is deposited on the zeolite. Examples of the elements in the framework are tin, boron, iron or titanium. The catalyst is prepared by synthesizing a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework; depositing the metal; and calcining after preparation of the zeolite and before or after depositing the metal. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with alkanes having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: March 3, 2015
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott F. Mitchell, Alla K. Khanmamedova, Scott A. Stevenson, Jim Vartuli
  • Publication number: 20150018590
    Abstract: In an embodiment a catalyst comprises a medium or large pore zeolite having germanium incorporated into the zeolite framework. The zeolite can have a pore structure that is one dimensional, two dimensional or three dimensional. A metal selected from Group 10 can be deposited on the zeolite. In an embodiment, a process for synthesizing the zeolite comprises preparing a medium pore zeolite containing germanium in the framework of the zeolite and calcining the zeolite. In an embodiment, the catalyst can be used in a process for the conversion of hydrocarbons comprising contacting a hydrocarbon stream containing alkanes, olefins, or mixtures thereof having 2 to 12 carbon atoms per molecule with the catalyst and recovering the product.
    Type: Application
    Filed: April 29, 2014
    Publication date: January 15, 2015
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Scott A. Stevenson, Alla K. Khanmamedova, Dustin B. Farmer, Scott F. Mitchell, Jim Vartuli
  • Patent number: 8889088
    Abstract: An integrated facility is disclosed for simultaneous production of butanal and methacrylic acid products where the facility utilizes a mixed methacrolein and isobutanal stream to make methacrylic acid. The facility is also designed to utilize downstream n-butanal products such as n-butanol and/or 2-ethyl-hexanol to make butyl-methacrylates and 2-ethyl-hexyl-methacrylate. A method is also disclosed which integrates the production of butanal derived products and methacrylic acid derived products.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: November 18, 2014
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Wugeng Liang
  • Publication number: 20140148629
    Abstract: The disclosure is for a process for producing propylene and hexene (along with ethylene, pentenes, product butenes, heptenes and octenes) by metathesis from butenes (iso-, 1- and cis and trans 2-) and pentenes and then aromatizing the hexenes (along with higher olefins, such as heptenes and octenes) to benzene (along with toluene, xylenes, ethylbenzene and styrene). Since the desired products of the metathesis reaction are propylene and hexene, the feed to the metathesis reaction has a molar ratio for 1-butene:2-butene which favors production of propylene and 3-hexene with the concentration of hexenes and higher olefins in the metathesis product being up to 30 mole %. An isomerization reactor may be used to obtain the desired molar ratio of 1-butene:2-butene for the feed composition into the metathesis reactor. After the metathesis reaction, of hexene and higher olefins are separated for aromatization to benzene and other aromatics.
    Type: Application
    Filed: February 4, 2014
    Publication date: May 29, 2014
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Jaap W. van Hal, Scott A. Stevenson, Jim Allman, David L. Sullivan, Travis Conant
  • Patent number: 8722950
    Abstract: The invention is for a process for producing propylene and hexene (along with ethylene, pentenes, product butenes, heptenes and octenes) by metathesis from butenes (iso-, 1- and cis and trans 2-) and pentenes and then aromatizing the hexenes (along with higher olefins, such as heptenes and octenes) to benzene (along with toluene, xylenes, ethylbenzene and styrene). Since the desired products of the metathesis reaction are propylene and hexene, the feed to the metathesis reaction has a molar ratio for 1-butene:2-butene which favors production of propylene and 3-hexene with the concentration of hexenes and higher olefins in the metathesis product being up to 30 mole %. An isomerization reactor may be used to obtain the desired molar ratio of 1-butene:2-butene for the feed composition into the metathesis reactor. After the metathesis reaction, of hexene and higher olefins are separated for aromatization to benzene and other aromatics.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: May 13, 2014
    Assignee: Saudi Basic Industries Corporation
    Inventors: Jaap W. van Hal, Scott A. Stevenson, Jim Allman, David L. Sullivan, Travis Conant
  • Publication number: 20130324778
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst contains a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework. At least one Group 10 metal, such as platinum, is deposited on the zeolite. Examples of the elements in the framework are tin, boron, iron or titanium. The catalyst is prepared by synthesizing a zeolite with one element from Group 13, Group 14, or the first series transition metals and, optionally, germanium and/or aluminum in the zeolite framework; depositing the metal; and calcining after preparation of the zeolite and before or after depositing the metal. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with alkanes having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Application
    Filed: August 7, 2013
    Publication date: December 5, 2013
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Scott F. Mitchell, Alla K. Khanmamedova, Scott A. Stevenson, Jim Vartuli
  • Publication number: 20130296625
    Abstract: Methods for preparing bound non-acidic germanium zeolite catalysts arc disclosed, where the preparation is reproducible and scalable and where the catalysts have similar or the same activity and selectivities of a standard naphtha aromatization catalyst and methods for aromatizing naphtha.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 7, 2013
    Inventors: Ashim K. Ghosh, Scott A. Stevenson, Neeta Kulkarni, Mike Mier, Balamurali K. Nair, Dustin Farmer
  • Publication number: 20130150643
    Abstract: Methods for olefin metathesis including contacting a olefin feed stream with a metathesis catalyst at a temperature and at a pressure sufficient to maintain the reactor olefin compositions in a mixed-phase condition including components in the liquid phase and components in the vapor phase, where the mixed-phase reaction conditions shift the equilibrium to desired product olefins.
    Type: Application
    Filed: December 8, 2011
    Publication date: June 13, 2013
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Travis Conant, Scott A. Stevenson
  • Patent number: 8232224
    Abstract: Methods for preparing catalysts for oxidation of unsaturated and/or saturated aldehydes to unsaturated acids is disclosed where the catalyst includes at least molybdenum (Mo), phosphorus (P), vanadium (V), bismuth (Bi), where the bismuth component was dissolved in an organic acid solution prior to adding the bismuth containing solution to a solution of the other components.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: July 31, 2012
    Assignee: Saudi Basic Industries Corporation
    Inventors: Wugeng Liang, Scott A. Stevenson, Angie McGuffey
  • Publication number: 20120122662
    Abstract: This invention is for a catalyst for conversion of hydrocarbons. The catalyst is a non-acidic germanium zeolite, such as Ge-ZSM-5, on which at least two metals, platinum and at least one other metal selected from Group 7, Group 8, Group 9, Group 10 and tin, are deposited on the germanium zeolite. Examples of the other metal are iridium, rhenium, palladium, ruthenium, rhodium, iron, cobalt and tin. The catalyst is prepared by synthesizing a germanium zeolite; depositing platinum and at least one other metal on the germanium zeolite; and calcining after preparation of the zeolite, before depositing the metals or after depositing the metals. The catalyst may be used in a process for the conversion of hydrocarbons, such as propane to aromatics, by contacting the catalyst with a hydrocarbon stream containing alkanes, olefins and mixtures thereof having 2 to 12 carbon atoms per molecule and recovering the product.
    Type: Application
    Filed: May 18, 2011
    Publication date: May 17, 2012
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson, Gopalakrishnan G. Juttu
  • Patent number: 8153852
    Abstract: This invention is for a catalyst for conversion of alkanes having two to six carbon atoms per molecule to aromatics. The catalyst is a MFI zeolite with a crystallite size of less than 15 microns with, in addition to silicon and aluminum, germanium as a framework element. Platinum is deposited on the zeolite. The zeolite may contain other optional tetravalent and trivalent elements in the zeolite framework. The catalyst is synthesized by preparing a zeolite containing aluminum, silicon, germanium and, optionally, other elements in the framework, calcining the zeolite and depositing platinum on the zeolite. The catalyst may be used for aromatization of alkanes, such as propane, to aromatics, such as benzene, toluene and xylenes.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 10, 2012
    Assignee: Saudi Basic Industries Corporation
    Inventors: Paul E. Ellis, Gopalakrishnan G. Juttu, Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson
  • Publication number: 20110263917
    Abstract: The invention is for a process for producing propylene and hexene (along with ethylene, pentenes, product butenes, heptenes and octenes) by metathesis from butenes (iso-, 1- and cis and trans 2-) and pentenes and then aromatizing the hexenes (along with higher olefins, such as heptenes and octenes) to benzene (along with toluene, xylenes, ethylbenzene and styrene). Since the desired products of the metathesis reaction are propylene and hexene, the feed to the metathesis reaction has a molar ratio for 1-butene:2-butene which favors production of propylene and 3-hexene with the concentration of hexenes and higher olefins in the metathesis product being up to 30 mole %. An isomerization reactor may be used to obtain the desired molar ratio of 1-butene:2-butene for the feed composition into the metathesis reactor. After the metathesis reaction, of hexene and higher olefins are separated for aromatization to benzene and other aromatics.
    Type: Application
    Filed: April 26, 2010
    Publication date: October 27, 2011
    Applicant: Saudi Basic Industries Corporation
    Inventors: Jaap W. Van Hal, Scott A. Stevenson, Jim Allman, David L. Sullivan, Travis R. Conant
  • Patent number: 7999133
    Abstract: Methods for making unsaturated acids using catalysts for oxidation of unsaturated and/or saturated aldehyde to unsaturated acids is disclosed where the catalyst including at least molybdenum (Mo) and phosphorus (P), where the catalyst has a pore size distribution including at least 50% medium pores and if bismuth is present, a nitric acid to molybdenum mole ratio of at least 0.5:1 or at least 6.0:1 moles of HNO3 per mole of Mo12.
    Type: Grant
    Filed: May 31, 2010
    Date of Patent: August 16, 2011
    Assignee: Sabic Basic Industries Corporation
    Inventors: Scott A. Stevenson, Wugeng Liang, James W. Kauffman, Lixia Cai, Angie McGuffey, Joseph R. Linzer
  • Publication number: 20110143931
    Abstract: Methods for preparing catalystis for exidation of unsaturated and/or saturated aldehydes to unsaturated acids is disclosed where the catalyst includes at least molybenum (Mo), phosphorus (P), vanadium (V), bismuth (Bi), where the bismuth component was dissolved in an organic acid solution prior to adding the bismuth containing solution to a solution of the other components.
    Type: Application
    Filed: November 18, 2010
    Publication date: June 16, 2011
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Wugeng Liang, Scott A. Stevenson, Angie McGuffey