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Method for direct treatment of cork stoppers, using supercritical fluids

Research output: Patent


  • Vesna Najdanovic-Visak (Inventor)
  • Manuel Luis de Magalhaes Nunes da Ponte (Inventor)
  • Jose Antonio da Silva Lopes (Inventor)
  • Marina Manic (Inventor)
  • Ana Cristina de Avelar Lopes Cardoso Mesquita (Inventor)
  • Rui Pedro Moreira da Silva (Inventor)
  • Isabel Maria de Queroz Montenegro Sollari Allegro (Inventor)
Publication date19/08/2010
Patent numberWO/2010/093273
<mark>Original language</mark>English


This invention describes a method which permits direct treatment of natural cork stoppers, using supercritical fluids with the aim to eliminate or significantly reduce the quantity of cork contaminants, namely 2, 4, 6-trichloroanisole. The process uses a separating device which permits natural cork stoppers to go through compression/decompression cycles without losing their shape and maintaining their sealing properties. This invention refers also to the natural cork stoppers treated by this method.