Patents by Inventor Ubaldus F. Kragten

Ubaldus F. Kragten 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: 5959153
    Abstract: Process for decomposing a mixture containing cycloalkylhydroperoxide, which mixture includes an organic phase and an aqueous phase wherein, during the decomposition, at least one compound is present which meets the following parameters:A>-0.5 and B>-1.0 (1)A and B being dependent on T.sub.b, .rho., n.sub.d, .epsilon..sub.r, .delta..sub.d, .delta..sub.p, .delta..sub.h, .delta., .mu. and E.sub.T(30), where T.sub.b is the normal boiling point (.degree. C.), .rho. is the density measured at 25.degree. C. (kg/m.sup.3), n.sub.d is the refractive index (-), .epsilon..sub.r is the relative dielectric constant (-), .delta..sub.d is the Hansen solubility parameter for a dispersion (MPa.sup.1/2), .delta..sub.p is the Hansen solubility parameter for polarity (MPa.sup.1/2), .delta..sub.h is the Hansen solubility parameter for hydrogen bridges (MPa.sup.1/2), .delta. is the Scatchard-Hildebrant solubility parameter (MPa.sup.1/2), .mu. is the dipole moment (Debey), and E.sub.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: September 28, 1999
    Assignee: DSM N.V.
    Inventors: Ubaldus F. Kragten, Henricus A. C. Baur
  • Patent number: 5905173
    Abstract: The invention relates to a process for decomposing a mixture containing cycloalkyl hydroperoxide with an aqueous phase containing alkali metal hydroxide where, besides the alkali metal hydroxide, there is also at least 10 wt. % of the aqueous phase of one or more alkali metal salts. The alkali metal salts are preferably alkali metal carbonates, or alkali metal salts of mono- and poly-carboxylic acids, with the carboxylic acid moiety containing 1-24 carbon atoms.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: May 18, 1999
    Assignee: DSM NV
    Inventors: Ubaldus F. Kragten, Henricus A.C. Baur, Johannes G.H.M. Housmans
  • Patent number: 5859301
    Abstract: An improved process for preparing alkanones and alkanols by oxidizing an alkane and/or alkene having from 3 to 30 carbon atoms to form an oxidation mixture containing alkylhydroperoxide. A basic, aqueous solution is added to the oxidation mixture so that a separate basic water phase with a pH higher than 8.5 is formed. The alkylhydroperoxide is then decomposed in the presence of a heterogeneous catalyst which contains a metal compound immobilized on a carrier material. The metal of the catalyst is selected from the group consisting of Mn, Fe, Co, Ni, and Cu. The carrier material is stable in the presence of the separate basic water phase.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: January 12, 1999
    Assignee: DSM N.V.
    Inventors: Ubaldus F. Kragten, Henricus A. C. Baur
  • Patent number: 5406001
    Abstract: The present invention relates to a method for the continuous preparation of a mixture of a cycloalkanone, a cycloalkanol and a cycloalkylhydroperoxide. In the method, a cycloalkane, corresponding to the cycloalkenone, cycloalkenol and cycloalkylhydroperoxide, is oxidized in a continuous process, with the aid of an oxygen-containing gas, in the absence of a metal catalyst, at a temperature of between 130.degree. C. and 200.degree. C. The oxidation is at least partly carried out in the presence of between 0.002 and 2 mmol of a phenolic compound per kg of reaction mixture (mmol/kg).
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: April 11, 1995
    Assignee: DSM N.V.
    Inventors: Johannes G. H. M. Housmans, Ubaldus F. Kragten
  • Patent number: 5364962
    Abstract: The invention relates to a method for the purification of benzoic acid, which is obtainable through oxidation of the corresponding toluene derivative, by treating it with a --NH.sub.2 or --NHR containing component in which R represents a carbon containing group, said component being applied to a support.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: November 15, 1994
    Assignee: Stamicarbon B.V.
    Inventors: Ubaldus F. Kragten, Miriam K. J. Frohn-Schlosser
  • Patent number: 5298665
    Abstract: The invention relates to a process for preparing an alkanone and/or alkanol by oxidizing an alkane with 3-30 C-atoms, using oxygen, to form an alkyl hydroperoxide, followed by a decomposition of the resulting alkyl hydroperoxide in the presence of a metal compound immobilized on a carrier, which carrier carries aliphatic or aromatic amine groups or sulphide groups. The process is preferably applied to cycloalkanes.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: March 29, 1994
    Assignee: DSM N.V.
    Inventors: Ludovicus H. W. Janssen, Peter Hoogendoorn, Ubaldus F. Kragten, Henricus A. C. Baur
  • Patent number: 5004837
    Abstract: The invention relates to a process for preparing a cycloalkanone and/or cycloalkanol by oxidation of a cycloalkane using oxygen to form a hydroperoxide, followed by a decomposition of the hydroperoxide, in the presence of an organic metal complex, the decomposition being carried out in the presence of a phthalocyanine or porphyrin metal complex immobilized on a carrier material.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: April 2, 1991
    Assignee: Stamicarbon B.V.
    Inventors: Henricus A. C. Baur, Ubaldus F. Kragten