Patents by Inventor Raf Loenders

Raf Loenders 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 (meth)acrylate di-ammonium salts and their use as monomers for the synthesis of polymers
    Patent number: 7799944
    Abstract: The invention relates to the preparation of (meth)acrylate di-ammonium salts responding to formula (I) wherein R1 represents hydrogen or methyl, each R2, independently, represents an alkyl comprising from 1 to 4 carbon atoms, each R3, independently, represents an alkyl or an aralkyl and each X?, independently, represents an anion; having a high purity and their use as monomers for the synthesis of polymers useful as cationic flocculants.
    Type: Grant
    Filed: September 6, 2004
    Date of Patent: September 21, 2010
    Assignee: Taminco N.V.
    Inventors: Piet Vanneste, Raf Loenders, Ivan Vanden Eynde, Sabine Eeckhaoudt
  • Process for obtaining amines by reduction of amides
    Patent number: 7504540
    Abstract: Disclosed is a process for the preparation of primary, secondary and tertiary amines via a catalytic hydrogenation of unsubstituted, N-substituted, and N,N-disubstituted amides. The amide is led, together with an auxiliary amine, in vaporised form in a hydrogen containing gas flow over the catalyst. The process can be carried out at relatively low pressures, between 2 and 50 bars, using typical hydrogenation catalysts like CuCr-type catalysts. The amine is obtained with high yield and high selectivity. The process can be carried out in a continuous fixed bed reactor.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: March 17, 2009
    Assignee: Taminco N.V.
    Inventors: Raf Loenders, Ivan Vanden Eynde, Piet Vanneste
  • PROCESS FOR OBTAINING AMINES BY REDUCTION OF AMIDES
    Publication number: 20070191642
    Abstract: Disclosed is a process for the preparation of primary, secondary and tertiary amines via a catalytic hydrogenation of unsubstituted, N-substituted, and N,N-disubstituted amides. The amide is led, together with an auxiliary amine, in vaporised form in a hydrogen containing gas flow over the catalyst. The process can be carried out at relatively low pressures, between 2 and 50 bars, using typical hydrogenation catalysts like CuCr-type catalysts. The amine is obtained with high yield and high selectivity. The process can be carried out in a continuous fixed bed reactor.
    Type: Application
    Filed: January 9, 2007
    Publication date: August 16, 2007
    Inventors: Raf Loenders, Ivan Vanden Eynde, Piet Vanneste
  • Process for the preparation of (meth)acrylate di-ammonium salts and their use as monomers for the synthesis of polymers
    Publication number: 20070010591
    Abstract: The invention relates to the preparation of (meth)acrylate di-ammonium salts responding to formula (I) wherein R1 represents hydrogen or methyl, each R2, independently, represents an alkyl comprising from 1 to 4 carbon atoms, each R3, independently, represents an alkyl or an aralkyl and each X?, independently, represents an anion; having a high purity and their use as monomers for the synthesis of polymers useful as cationic flocculants.
    Type: Application
    Filed: September 6, 2004
    Publication date: January 11, 2007
    Inventors: Piet Vanneste, Raf Loenders, Ivan Vanden Eynde, Sabine Eeckhaoudt
  • Process for obtaining amines by reduction of amides
    Publication number: 20060287556
    Abstract: Disclosed is a process for the preparation of primary, secondary and tertiary amines via a catalytic hydrogenation of unsubstituted, N-substituted, and N,N-disubstituted amides. The amide is led, together with an auxiliary amine, in vaporised form in a hydrogen containing gas flow over the catalyst. The process can be carried out at relatively low pressures, between 2 and 50 bars, using typical hydrogenation catalysts like CuCr-type catalysts. The amine is obtained with high yield and high selectivity. The process can be carried out in a continuous fixed bed reactor.
    Type: Application
    Filed: June 21, 2005
    Publication date: December 21, 2006
    Inventors: Raf Loenders, Ivan Vanden Eynde, Piet Vanneste