Patents by Inventor Iuri Freytag

Iuri Freytag 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 purification of vinyl acetate for use in polymerization in the presence of ethylene
    Patent number: 11059770
    Abstract: Process for purification of unreacted vinyl acetate monomers comprising the steps of preliminarily loading an adsorbent agent bed with a mixture comprising an inert gas and fresh vinyl acetate; and feeding said adsorbent agent bed with unreacted vinyl acetate monomers to remove acetic acid.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Assignee: Braskem, S.A.
    Inventors: Dihogenes Adriano Pozzer, Olavo Martins Junior, Alessandra Coelho Silva Lucas, Iuri Freytag
  • PROCESS FOR PURIFICATION OF VINYL ACETATE FOR USE IN POLYMERIZATION IN THE PRESENCE OF ETHYLENE
    Publication number: 20200115315
    Abstract: Process for purification of unreacted vinyl acetate monomers comprising the steps of preliminarily loading an adsorbent agent bed with a mixture comprising an inert gas and fresh vinyl acetate; and feeding said adsorbent agent bed with unreacted vinyl acetate monomers to remove acetic acid.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 16, 2020
    Applicant: Braskem S.A.
    Inventors: Dihogenes Adriano Pozzer, Olavo Martins Junior, Alessandra Coelho Silva Lucas, Iuri Freytag