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: 8119551
    Abstract: The present invention is for a catalyst, a process for making the catalyst and a process for using the catalyst in aromatization of alkanes having three to five carbon atoms per molecule, such as propane, to aromatics, such as benzene, toluene and xylene. The catalyst is an aluminum-silicon zeolite having a silicon to aluminum atomic ratio (Si:Al) greater than 15:1, such as MFI or ZSM-5, on which germanium, aluminum and a noble metal, such as platinum, have been deposited. The catalyst may be bound with magnesia, alumina, titania, zirconia, thoria, silica, boria or mixtures thereof. The aluminum and germanium may be deposited simultaneously on the zeolite.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: February 21, 2012
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott Stevenson, Gopalakrishnam G. Juttu, Michael Mier, Robin J. Bates, Dustin Farmer, Scott Mitchell, Alla K. Khanmamedova
  • 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: 20110172479
    Abstract: The present invention is for a catalyst, a process for making the catalyst and a process for using the catalyst in aromatization of alkanes having three to five carbon atoms per molecule, such as propane, to aromatics, such as benzene, toluene and xylene. The catalyst is an aluminum-silicon zeolite having a silicon to aluminum atomic ratio (Si:Al) greater than 15:1, such as MFI or ZSM-5, on which germanium, aluminum and a noble metal, such as platinum, have been deposited. The catalyst may be bound with magnesia, alumina, titania, zirconia, thoria, silica, boria or mixtures thereof. The aluminum and germanium may be deposited simultaneously on the zeolite.
    Type: Application
    Filed: January 14, 2010
    Publication date: July 14, 2011
    Applicant: Saudi Basic Industries Corporation
    Inventors: Scott Stevenson, Gopalakrishnan G. Juttu, Michael Mier, Robin J. Bates, Dustin Farmer, Scott Mitchell, Alla K. Khanmamedova
  • 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
  • Publication number: 20110132804
    Abstract: This invention relates to a process for the increasing the octane number of a naphtha hydrocarbon feed having a predominantly paraffin content with a germanium-containing zeolite catalyst. The catalyst is a non-acidic germanium zeolite on which a noble metal, such as platinum, has been deposited. The zeolite structure may be of MTW, MWW, MEL, TON, MRE, FER, MFI, BEA, MOR, LTL or MTT. The zeolite is made non-acidic by being base-exchanged with an alkali metal or alkaline earth metal, such as cesium, potassium, sodium, rubidium, barium, calcium, magnesium and mixtures thereof, to reduce acidity. The catalyst is sulfur tolerant. The hydrocarbon feed may contain sulfur up to 1000 ppm. The present invention could be applicable to a feedstream which is predominantly naphthenes and paraffins.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 9, 2011
    Applicant: Saudi Basic Industries Corporation
    Inventors: Scott Stevenson, Paul E. Ellis, Mike Mier, Dustin Farmer, Alla Khanmamedova, Scott Mitchell
  • Patent number: 7923404
    Abstract: Methods of making 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: April 12, 2011
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Wugeng Liang, James W. Kauffman, Lixia Cai, Angie McGuffey, Joseph R. Linzer
  • Patent number: 7902413
    Abstract: This invention relates to a process for the aromatization of C6 to C12 alkanes, such as hexane, heptane and octane, to aromatics, such as benzene, ethyl benzene, toluene and xylenes, with a germanium-containing zeolite catalyst. The catalyst is a non-acidic aluminum-silicon-germanium zeolite on which a noble metal, such as platinum, has been deposited. The zeolite structure may be of MFI, BEA, MOR, LTL or MTT. The zeolite is made non-acidic by being base-exchanged with an alkali metal or alkaline earth metal, such as cesium, potassium, sodium, rubidium, barium, calcium, magnesium and mixtures thereof, to reduce acidity. The catalyst is sulfur tolerant and may be pretreated with a sulfur compound, i.e., sulfided. The hydrocarbon feed may contain sulfur up to 1000 ppm. The present invention could be applicable to a feedstream which is predominantly paraffinic and/or low in naphthenes. Lowering the hydrogen to hydrocarbon ratio increases conversion and aromatics selectivity.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: March 8, 2011
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Dustin B. Farmer, Scott F. Mitchell, Gopalakrishnan G. Juttu, Alla K. Khanmamedova, Paul E. Ellis
  • Publication number: 20100323882
    Abstract: Methods of making 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: Application
    Filed: May 31, 2010
    Publication date: December 23, 2010
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Scott A. Stevenson, Wugeng Liang, James W. Kauffman, Lixia Cai, Angie McGuffey, Joseph R. Linzer
  • Patent number: 7851397
    Abstract: A catalyst 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), and a first component selected from the group consisting of potassium (K), rubidium (Rb), cesium (Cs), thallium (Tl), or mixtures or combinations thereof, 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. Methods for making and using the catalysts are also disclosed.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: December 14, 2010
    Assignee: Saudi Basic Industries Corporation
    Inventors: Wugeng Liang, Scott A. Stevenson, Angie McGuffey
  • Publication number: 20100280297
    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: Application
    Filed: April 29, 2009
    Publication date: November 4, 2010
    Applicant: Saudi Basic Industries Corporation
    Inventors: Paul E. Ellis, Gopalakridhnan G. Juttu, Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson
  • Publication number: 20100260647
    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: Application
    Filed: January 13, 2010
    Publication date: October 14, 2010
    Inventors: Scott A. Stevenson, Wugeng Liang
  • Publication number: 20100240925
    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: Application
    Filed: May 31, 2010
    Publication date: September 23, 2010
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Scott A. Stevenson, Wugeng Liang, James W. Kauffman, Lixia Cai, Angie McGuffey, Joseph R. Linzer
  • Patent number: 7745675
    Abstract: This invention relates to a process for regeneration of a zeolite catalyst, specifically an aluminosilicate zeolite with germanium substituted in the framework for silicon and with platinum deposited on the zeolite. The catalyst may be used in a process for aromatization of alkanes, specifically C2-C8 alkanes. The regeneration process 1) removes coke and sulfur from the catalyst via oxidation, 2) redisperses platinum on the surface of the catalyst via chlorine gas, 3) removes chlorine and bind Pt to the surface of the zeolite by steaming, 4) reduces the catalyst in hydrogen, and 5) optionally, resulfides the catalyst. The zeolite may be a MFI zeolite. The catalyst may be bound with an inert material which does not act as a binding site for platinum during the regeneration process, for example, silica.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: June 29, 2010
    Assignee: Saudi Basic Industries Corporation
    Inventors: Paul E. Ellis, Gopalakrishnan G. Juttu, Alla K. Khanmamedova, Scott F. Mitchell, Scott A. Stevenson
  • Patent number: 7732367
    Abstract: A catalyst for oxidation of unsaturated and/or saturated aldehyde to unsaturated acids is disclosed where the catalyst including at least molybdenum (Mo), phosphorus (P), vanadium (V), bismuth (Bi), and a first component selected from the group consisting of potassium (K), rubidium (Rb), cesium (Cs), thallium (Tl), or mixtures or combinations thereof, where the catalyst has at least 57% medium pores and 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. Methods for making and using such catalysts are also disclosed.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: June 8, 2010
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Wugeng Liang, James W. Kauffman, Lixia Cai, Angie McGuffey, Joseph R. Linzer
  • Patent number: 7649111
    Abstract: A heteropolyacid catalyst for oxidation of isobutyraldehyde, methacrolein or mixtures or combinations thereof to methacrylic acid is disclosed where the heteropolyacid catalyst includes at least molybdenum (Mo), phosphorus (P), vanadium (V), and a first component including bismuth (Bi) and/or boron (B). The heteropolyacid catalyst can also optionally include a second component including potassium (K), rubidium (Rb), cesium (Cs), and/or thallium (Tl) and optionally a third component including antimony (Sb), cerium (Ce), niobium (Nb), indium (In), iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), arsenic (As), silver (Ag), zinc (Zn), germanium (Ge), gallium (Ga), zirconium (Zr), magnesium (Mg), barium (Ba), lead (Pb), tin (Sn), titanium (Ti), aluminum (Al), silicon (Si), tantalum (Ta), tungsten (W), and/or lanthanum (La). The heteropolyacid catalyst can also include an ammonium-containing compound designed to increase a value of medium pores in the final heteropolyacid catalyst.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: January 19, 2010
    Assignee: Saudi Basic Industries Corporation
    Inventors: Wugeng Liang, Scott A. Stevenson, Angie McGuffey, Joseph R. Linzer
  • Patent number: 7649112
    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: July 25, 2005
    Date of Patent: January 19, 2010
    Assignee: Saudi Basic Industries Corporation
    Inventors: Scott A. Stevenson, Wugeng Liang
  • Patent number: 7501377
    Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: March 10, 2009
    Assignee: Saudi Basic Industries Corporation
    Inventors: Wugeng Liang, Scott A. Stevenson, James W. Kauffman, John S. Ledford, Joseph R. Linzer
  • Publication number: 20090005601
    Abstract: The disclosed process relates to the removal of malodorous compounds from dimethyl sulfoxide.
    Type: Application
    Filed: September 17, 2007
    Publication date: January 1, 2009
    Inventors: George Kvakovszky, David Villarrubia, II, Scott Stevenson, Charles G. Ashe
  • Publication number: 20080293989
    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: Application
    Filed: May 22, 2008
    Publication date: November 27, 2008
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Alla K. Khanmamedova, Scott A. Stevenson, Scott F. Mitchell, Dustin B. Farmer, Jim Vartuli