Patents Assigned to Proras S.r.l
  • Process and plant to extract and concentrate tannins from wood and from other natural products
    Patent number: 7145031
    Abstract: Process and a plant to extract and concentrate tannins from wood and from other solid natural products containing it characterized in that the solid products are subjected to an extraction (1) by percolation with water and/or steam and the thus obtained tannin solution is subjected to nanofiltration (5).
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: December 5, 2006
    Assignee: Proras S.r.l
    Inventors: Adriana Arcangeli, legal representative, Giacomo Matturro, Paolo Danesi, Andrea Festuccia, Carlo Mustacchi, deceased