Patents by Inventor Frits Van Der Veer

Frits Van Der Veer 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).

  • Process for the preparation of a copolymer of carbon monoxide
    Patent number: 5747638
    Abstract: A process for the copolymerization of carbon monoxide with ethene and optionally another olefinically unsaturated compound in which process the monomers are copolymerized in the presence of a liquid diluent and a catalyst composition which is based on(a) a Group VIII metal compound,(b) an anion of an acid which is obtainable by combining a Br.o slashed.nsted acid with a Lewis acid, and(c) an organic oxidant in a quantity of less than 30 moles per mole of Group VIII metal.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: May 5, 1998
    Assignee: Shell Oil Company
    Inventors: Eit Drent, Frits Van Der Veer, Rudolf Jacobus Wijngaarden
  • Preparation of catalyst solution
    Patent number: 5684123
    Abstract: A process for the preparation of a solution of a catalyst system, suitable for use in a process for copolymerizing carbon monoxide and one or more ethylenically unsaturated compounds, which comprises (a) combining a palladium compound, a bisphosphine of the general formula R.sup.1 R.sup.2 P--R--PR.sup.3 R.sup.4 (I) wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents an aromatic hydrocarbyl group which is substituted with an alkoxy group and R represents a bivalent bridging group containing at least two carbon atoms in the bridge, and a lower alcohol as solvent, and (b) admixing the obtained combination after a generation period G, during which a temperature T in the range of 0.degree.-70.degree. C. is maintained, with an acid having a pKa of less than 2, whereby the said generation period G is selected such that the value for G (in hours) and the temperature T in .degree.C.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: November 4, 1997
    Assignee: Shell Oil Company
    Inventors: Frits Van Der Veer, Rudolf Jacobus Wijngaarden
  • Preparation of catalyst solution
    Patent number: 5654250
    Abstract: A process for the preparation of a solution of a catalyst system, suitable for use in a process for copolymerizing carbon monoxide and one or more ethylenically unsaturated compounds, which comprises (a) combining a palladium compound, a bisphosphine of the general formula R.sup.1 R.sup.2 P-R-PR.sup.3 R.sup.4 (I) wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents an aromatic hydrocarbyl group which is substituted with an alkoxy group and R represents a bivalent bridging group containing at least two carbon atoms in the bridge, and a lower alcohol as solvent, and (b) admixing the obtained combination after a generation period G, during which a temperature T in the range of 0.degree.-70.degree. C. is maintained, with an acid having a pKa of less than 2, whereby the said generation period G is selected such that the value for G (in hours) and the temperature T (in .degree.C.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: August 5, 1997
    Assignee: Shell Oil Company
    Inventors: Frits Van Der Veer, Rudolf Jacobus Wijngaarden