	US 12,378,727 B2
	Modified sulfuric acid and uses thereof
Clay Purdy, Medicine Hat (CA); Markus Weissenberger, Calgary (CA); Markus Pagels, Calgary (CA); and Kyle G Wynnyk, Calgary (CA)
Assigned to SIXRING INC., Calgary (CA)
Filed by SixRing Inc., Calgary (CA)
Filed on May 22, 2024, as Appl. No. 18/671,686.
Application 18/671,686 is a division of application No. 17/407,297, filed on Aug. 20, 2021, granted, now 12,024,821.
Claims priority of application No. CA 3110357 (CA), filed on Feb. 25, 2021.
Prior Publication US 2024/0309585 A1, Sep. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. D21C 3/00 (2006.01); D21C 1/02 (2006.01); D21C 1/04 (2006.01); D21C 3/04 (2006.01); D21C 3/20 (2006.01); D21C 3/22 (2006.01); D21C 9/16 (2006.01)

CPC D21C 3/003 (2013.01) [D21C 1/04 (2013.01); D21C 3/04 (2013.01); D21C 9/16 (2013.01)]

14 Claims

1. A one-pot process to separate lignin from a lignocellulosic feedstock, the process comprising:

providing a vessel;

providing a lignocellulosic feedstock;

providing a composition comprising:

an acid;

a modifying agent comprising a heterocyclic compound; and

a peroxide; and

exposing the lignocellulosic feedstock to the composition in the vessel for a period of time sufficient to remove at least 80% of the lignin present in the lignocellulosic feedstock.