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Processes for preparing carbon fibers using gaseous sulfur trioxide

United States Patent

January 5, 2016
View the Complete Patent at the US Patent & Trademark Office
Disclosed herein are processes for preparing carbonized polymers, such as carbon fibers, comprising: sulfonating a polymer with a sulfonating agent that comprises SO.sub.3 gas to form a sulfonated polymer; treating the sulfonated polymer with a heated solvent, wherein the temperature of said solvent is at least C.; and carbonizing the resulting product by heating it to a temperature of C.
Barton; Bryan E. (Midland, MI), Lysenko; Zenon (Midland, MI), Bernius; Mark T. (Bowling Green, OH), Hukkanen; Eric J. (Midland, MI)
Dow Global Technologies LLC (Midland, MI)
14/ 413,457
July 3, 2013
STATEMENT OF GOVERNMENT INTEREST This invention was made under a NFE-10-02991 between The Dow Chemical Company and UT-Batelle, LLC, operating and management Contractor for the Oak Ridge National Laboratory operated for the United States Department of Energy. The Government has certain rights in this invention.