Patents by Inventor Adolf Daan Zijl

Adolf Daan Zijl 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 simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
    Patent number: 8779182
    Abstract: Process for the simultaneous and continuous production of two different mixtures of predominantly 4,4?-MDI and 2,4?-MDI in a single-step suspension melt crystallisation process whereby a mixed diisocyanate feed stream [MIx] is used to produce simultaneously two mixed diisocyanate streams [MIy] and [MIz] wherein x=80 to 92, y=97 to 99 and z=60 to 80 preferably x=82 to 88, y=97.2 to 98.5 and z=63 to 70 where x, y and z are percentages by weight of the 4,4?-MDI isomer contained in the diisocyanate isomer mixture.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: July 15, 2014
    Assignee: Huntsman International LLC
    Inventors: Johannes Lodewijk Koole, Adolf Daan Zijl, Robert Henry Carr
  • PROCESS FOR THE SIMULTANEOUS PRODUCTION OF DIFFERENT MIXTURES OF DIISOCYANATE ISOMERS OF THE DIPHENYLMETHANE SERIES
    Publication number: 20110224456
    Abstract: Process for the simultaneous and continuous production of two different mixtures of predominantly 4,4?-MDI and 2,4?-MDI in a single-step suspension melt crystallisation process whereby a mixed diisocyanate feed stream [MIx] is used to produce simultaneously two mixed diisocyanate streams [MIy and MIz] wherein x=80 to 92, y=97 to 99 and z=60 to 80 preferably x=82 to 88, y=97.2 to 98.5 and z=63 to 70 where x, y and z are percentages by weight of the 4,4?-MDI isomer contained in the diisocyanate isomer mixture.
    Type: Application
    Filed: October 1, 2009
    Publication date: September 15, 2011
    Applicant: Huntsman International LLC
    Inventors: Johannes Lodewijk Koole, Adolf Daan Zijl, Robert Henry Carr