Patents by Inventor Aalbert Zwijnenburg

Aalbert Zwijnenburg 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: 9895678
    Abstract: A method for making a solid material which is useful as a heterogeneous catalyst including the steps of: forming at least one copper oxide suspension comprising solid particles of copper oxide in a liquid; forming at least one carrier suspension comprising solid particles of a carrier material in a liquid; combining the copper oxide suspension and the carrier suspension; subjecting the combined suspensions to mechanical energy; separating the suspension liquid from the solid particles in the combined suspension; and subjecting the solid material to a thermal decomposition step. A catalyst made by the method has a BET surface area greater than 150 m2/g, a particle size distribution in which D50 is in the range from 25-35 ?m, and wherein the D50 after 60 minutes ultrasound treatment is at least 30% of the original value.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: February 20, 2018
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Joachim Pohl, Aalbert Zwijnenburg
  • Patent number: 9850450
    Abstract: A process for the production of an ester product from a mixture of at least two different ester compounds includes the steps of mixing together at least two different starting ester compounds to form a first ester mixture; and contacting the first ester mixture with a catalyst including from 30-60% of calcium oxide and at least one second metal oxide at a temperature of at least 180° C., for a duration of at least one hour, with mixing, to form a second ester mixture having a melting point which is lower than the melting point of the first ester mixture.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: December 26, 2017
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Peter Richard Ellis, Gary Evans, Aalbert Zwijnenburg
  • Patent number: 9487711
    Abstract: A process for the production of a hydrocarbon product comprises contacting a feedstock with a catalyst composition comprising an active metal selected from platinum, palladium, nickel, cobalt, copper, ruthenium, rhodium and rhenium and an active porous material which is active for the isomerization of unsaturated hydrocarbons, wherein the feedstock comprises a fatty acid a fatty acid ester, a monoglyceride, a diglyceride or a triglyceride.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: November 8, 2016
    Assignee: Johnson Matthey PLC
    Inventors: David Davis, Cornelis Martinus Lok, Michael John Watson, Aalbert Zwijnenburg
  • Publication number: 20160201011
    Abstract: A process for the production of an ester product from a mixture of at least two different ester compounds includes the steps of mixing together at least two different starting ester compounds to form a first ester mixture; and contacting the first ester mixture with a catalyst including from 30-60% of calcium oxide and at least one second metal oxide at a temperature of at least 180° C., for a duration of at least one hour, with mixing, to form a second ester mixture having a melting point which is lower than the melting point of the first ester mixture.
    Type: Application
    Filed: August 15, 2014
    Publication date: July 14, 2016
    Inventors: Peter Richard ELLIS, Gary EVANS, Aalbert ZWIJNENBURG
  • Publication number: 20150094499
    Abstract: A method for making a solid material which is useful as a heterogeneous catalyst including the steps of: forming at least one copper oxide suspension comprising solid particles of copper oxide in a liquid; forming at least one carrier suspension comprising solid particles of a carrier material in a liquid; combining the copper oxide suspension and the carrier suspension; subjecting the combined suspensions to mechanical energy; separating the suspension liquid from the solid particles in the combined suspension; and subjecting the solid material to a thermal decomposition step. A catalyst made by the method has a BET surface area greater than 150 m2/g, a particle size distribution in which D50 is in the range from 25-35 ?m, and wherein the D50 after 60 minutes ultrasound treatment is at least 30% of the original value.
    Type: Application
    Filed: March 28, 2013
    Publication date: April 2, 2015
    Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: Joachim Pohl, Aalbert Zwijnenburg
  • Publication number: 20110105817
    Abstract: A process for the production of a hydrocarbon product comprises contacting a feedstock with a catalyst composition comprising an active metal selected from platinum, palladium, nickel, cobalt, copper, ruthenium, rhodium and rhenium and an active porous material which is active for the isomerisation of unsaturated hydrocarbons, wherein the feedstock comprises a fatty acid a fatty acid ester, a monoglyceride, a diglyceride or a triglyceride.
    Type: Application
    Filed: January 26, 2009
    Publication date: May 5, 2011
    Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: Aalbert Zwijnenburg, David Davis, Cornelis Martinus Lok, Michael John Watson