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Method to separate lignin-rich solid phase from acidic biomass suspension at an acidic pH

United States Patent

9,751,781
September 5, 2017
View the Complete Patent at the US Patent & Trademark Office
A method of separating a lignin-rich solid phase from a solution suspension, by pretreating a lignocellulosic biomass with a pretreatment fluid having remove soluble components, colloidal material and primarily lignin containing particles; separating the pretreated lignocellulosic biomass from the pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles; flocculating the separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles using polyethylene oxide (i.e., PEO) or cationic Poly acrylamide (i.e., CPAM) as a flocculating agent; and filtering the flocculated separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles to remove agglomerates.
Yasarla; Lakshmi Rakesh Kumar (Vijayawada, IN), Ramarao; Bandaru V. (Fayetteveille, NY), Amidon; Thomas (Jamesville, NY)
The Research Foundation for The State University of New York (Binghamton, NY)
14/ 387,169
20150044733
March 15, 2013
STATEMENT OF GOVERNMENT SUPPORT This invention was made with government support under DE-FG36-07GO87004 awarded by the U.S. Department of Energy. The government has certain rights in this invention.