Patents by Inventor Arno H Benneker

Arno H Benneker 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 reducing the aldehyde concentration in a mixture comprising cyclohexanone and one or more aldehydes
    Patent number: 7601245
    Abstract: The invention relates to a process for reducing the aldehyde concentration in a mixture comprising cyclohexanone and one or more aldehydes, said process comprising distilling said mixture in a distillation column in the presence of an alkaline compound, wherein in the bottom of the distillation column substantially no water is present.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: October 13, 2009
    Assignee: DSM IP Assets B.V.
    Inventors: Arno H Benneker, Augustinus P H Schouteten, Larry W Wyatt
  • Process for producing cyclohexanone oxime by mixing an acidic aqueous solution comprising hydroxylammonium and phosphate with nitric acid
    Patent number: 7537745
    Abstract: The invention relates to a process for mixing a first acidic aqueous solution comprising hydroxylammonium and phosphate with a second acidic aqueous solution comprising nitric acid at a temperature between 20 and 80° C. resulting in a third acidic aqueous solution comprising hydroxylammonium, phosphate and nitric acid, wherein in the third acidic aqueous solution the total acid concentration minus the phosphate concentration is lower than 0.523*In([hydroxylammonium]/1.25)+422/(T+81) whereby [hydroxylammonium] is the concentration of hydroxylammonium in the third acidic aqueous solution, T is the temperature of the third acidic aqueous solution expressed in ° C. and all concentrations are expressed in mol/l.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: May 26, 2009
    Assignee: DSM IP Assets B.V.
    Inventors: Hendrik Oevering, Arno H Benneker
  • Process for treating an organic solution comprising cyclohexanone oxime, cyclohexanone, and an organic solvent
    Patent number: 7423178
    Abstract: The invention relates to a process for treating an organic solution comprising cyclohexanone oxime, cyclohexanone and an organic solvent, said process comprising distilling the organic solution such as to obtain (i) a first product comprising organic solvent, (ii) a second product comprising cyclohexanone and (iii) a third product comprising cyclohexanone oxime; and feeding the second product to a cyclohexanone oxime synthesis zone in which hydroxylammonium is reacted with cyclohexanone to form cyclohexanone oxime.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: September 9, 2008
    Assignee: DSM IP Assets B.V.
    Inventors: Hendrik Oevering, Arno H Benneker, Johannes A L Brouwers