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Article: Industry patents: the patent is a legal document giving the holder a license to capitalize on the invention without competition for a few years. In exchange, the holder teaches the basis of the invention.(Brief article)
- Article from:
- Plastics Engineering
- Article date:
- January 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 Society of Plastics Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Pervaporation Membranes
U.S. Patent 7,410,065 (August 12, 2008), "Membrane for the Separation of Material Mixtures and Method for Production Thereof," Katrin Ebert, Bastian Ruffmann, Joachim Koll, and Axel Wenzlaff (GKSS-Forschungszentrum Geesthacht GmbH, Geesthacht, Germany).
Membranes for separations are based on crosslinked polyvinyl alcohol resins and are generally usable up to about 100[degrees]C. Unfortunately, they do not have sufficient mechanical and chemical stability for dewatering organic solvents by vapor permeation or pervaporation. Ebert et al. have improved the stability of these membranes with the formation of magnesium, aluminum, ...