US 12,479,962 B2
Fractionation of woody biomass using phenol-4-sulfonic acid (PSA)
Qiang Yang, Portage, MI (US); and Duo He, Kalamazoo, MI (US)
Assigned to The Board of Trustees of Western Michigan University, Kalamazoo, MI (US)
Filed by THE BOARD OF TRUSTEES OF WESTERN MICHIGAN UNIVERSITY, Kalamazoo, MI (US)
Filed on May 17, 2022, as Appl. No. 17/746,346.
Claims priority of provisional application 63/191,154, filed on May 20, 2021.
Prior Publication US 2022/0380555 A1, Dec. 1, 2022
Int. Cl. C08H 8/00 (2010.01)
CPC C08H 8/00 (2013.01) 10 Claims
OG exemplary drawing
 
1. A method of fractionating lignocellulosic biomass, the method comprising:
fractionating lignocellulosic biomass in an aqueous phenol-4-sulfonic acid (PSA) comprising at least about 60% weight percentage PSA at a temperature of about 50° C.-80° C. for about 0.5 hours to about 3.0 hours to form a mixture comprising fractionated woody biomass and adsorbed PSA.