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Methods of pretreating comminuted cellulosic material with carbonate-containing solutions

United States Patent

November 6, 2012
View the Complete Patent at the US Patent & Trademark Office
Methods of pretreating comminuted cellulosic material with an acidic solution and then a carbonate-containing solution to produce a pretreated cellulosic material are provided. The pretreated material may then be further treated in a pulping process, for example, a soda-anthraquinone pulping process, to produce a cellulose pulp. The pretreatment solutions may be extracted from the pretreated cellulose material and selectively re-used, for example, with acid or alkali addition, for the pretreatment solutions. The resulting cellulose pulp is characterized by having reduced lignin content and increased yield compared to prior art treatment processes.
Francis; Raymond (Syracuse, NY)
The Research Foundation of State University of New York (Albany, NY)
12/ 933,185
March 17, 2009
STATE AND FEDERAL FUNDED RESEARCH This invention was made with government support under DE-FG02-06ER64266 awarded by the Department of Energy. The government has certain rights in the invention.