Patents Represented by Attorney Yuanzhang Han

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  • Direct epoxidation process
    Patent number: 7432384
    Abstract: A process is disclosed for the epoxidation of an olefin with hydrogen and oxygen in the presence of an oxidation catalyst comprising a transition metal zeolite and a polymer-encapsulated noble metal catalyst. The noble metal catalyst comprises a noble metal and an ion-exchange resin. The process using the polymer-encapsulated noble metal catalyst gives higher epoxide productivity than a process that uses a noble metal catalyst which is not encapsulated by a polymer.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: October 7, 2008
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Bi Le-Khac, Roger A. Grey
  • Direct epoxidation catalyst and process
    Patent number: 7387981
    Abstract: A catalyst comprising a transition metal zeolite and a supported noble metal is disclosed. The mean mass diameter of the catalyst is greater than 0.5 mm. The catalyst is formed from transition metal zeolite particles and the supported noble metal particles each having a mean mass diameter of less than 0.1 mm. An epoxidation process by reacting an olefin, hydrogen, and oxygen in the presence of the catalyst is disclosed.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: June 17, 2008
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Mark P. Kaminsky, Roger A. Grey, Jay F. Miller
  • Direct epoxidation catalyst
    Patent number: 7381675
    Abstract: A catalyst comprising a noble metal supported on a diatomaceous earth and a transition metal zeolite is disclosed. The catalyst is used in an epoxidation process comprising reacting an olefin, hydrogen, and oxygen. The diatomaceous earth is readily available and may be used in a slurry process without further particle size enlargement.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: June 3, 2008
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Jude T. Ruszkay, Roger A. Grey
  • Oxidation process
    Patent number: 7365217
    Abstract: A process is disclosed for reacting an olefin, hydrogen, and oxygen in a reactor in the presence of an epoxidation catalyst comprising a transition metal zeolite and a noble metal to produce a product stream comprising an epoxide and an alkane. The alkane is separated and oxidized to at least one oxygenated product.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: April 29, 2008
    Assignee: Lyondell Chemical Technology, L.P.
    Inventor: Roger A. Grey
  • Process for producing hydrogen peroxide
    Patent number: 7357909
    Abstract: A process for producing hydrogen peroxide from hydrogen and oxygen in the presence of a noble metal and a cationic polymer comprising a halogen-containing anion is disclosed. The cationic polymer improves hydrogen peroxide yield, and it can be easily recycled.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: April 15, 2008
    Assignee: Lyondell Chemical Technology, L.P.
    Inventor: Bi Le-Khac
  • Process for producing alkenyl alcohols
    Patent number: 7259280
    Abstract: A process for producing an alkenyl alcohol from a diol is disclosed. The process comprises dehydrating a diol in the presence of a catalyst comprising cerium oxide supported on a carrier. The carrier has a surface area in the range of 0.1 to 50 m2/g. The catalyst is more active than unsupported cerium oxide.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: August 21, 2007
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Andrew P. Kahn, Stephen H. Harris
  • Direct epoxidation process
    Patent number: 7238817
    Abstract: A process is disclosed for reacting an olefin, hydrogen, and oxygen in a reactor in the presence of a catalyst comprising a transition metal zeolite and a noble metal to produce a reaction mixture comprising an epoxide and acidic byproducts. A portion of the reaction mixture is contacted with an adsorbent so that a treated mixture having a reduced amount of byproducts is produced. The treated mixture is recycled back to the reactor. Including an adsorption step should improve the catalyst productivity and epoxide selectivity.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: July 3, 2007
    Assignee: Lyondell Chemical Technology, L.P.
    Inventor: Yuanzhang Han