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1. (WO2018138599) PROCESS FOR THE EXTRACTION OF VOLATILE CONTAMINANTS FROM CORK BY THERMAL DESORPTION

Pub. No.:    WO/2018/138599    International Application No.:    PCT/IB2018/050259
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Wed Jan 17 00:59:59 CET 2018
IPC: B27K 5/00
B27K 7/00
Applicants: FACULDADE DE CIÊNCIAS E TECNOLOGIA DA UNIVERSIDADE NOVA DE LISBOA
Inventors: NEVES DUARTE TEODORO, Orlando Manuel
Title: PROCESS FOR THE EXTRACTION OF VOLATILE CONTAMINANTS FROM CORK BY THERMAL DESORPTION
Abstract:
The present invention relates to a process for the extraction of volatile contaminants from cork by thermal desorption, i.e., by supplying thermal energy to break the bond between the volatile contaminant and cork. This process has its application namely in cork pieces, more specifically natural cork stoppers and granulates. This process is able of removing volatile contaminants, namely 2,4,6-trichloroanisole, commonly referred as TCA, as well as other contaminants with similar properties. The removal is based on a temperature stimulated desorption process in which the bond between the volatile contaminant and cork is broken followed by its release from the surface of the cork cells into the gas phase and subsequently removed by vacuum pumps.