Abstract: A composite membrane is provided for the separation of water with at least one separation layer of cross-linked polyvinyl alcohol, with the separation layer being subjected in a separate process step to a post-crosslinking operation with an acid or an acid-releasing compound and at least one dialdehyde.
Type:
Grant
Filed:
September 18, 2009
Date of Patent:
September 4, 2012
Assignee:
Souzer Chemtech GmbH
Inventors:
Andreas Hübner, Elena Gonzalez Diaz, Michael Frania