US 12,168,792 B2
Enhancing product streams from ethanol production
Mark Yancey, Grand Forks, ND (US); Dale Monceaux, Lakewood, CO (US); Neal Kemmet, Stanley, WI (US); Joe Fischer, Eau Claire, WI (US); and Colton Walz, Elk Mound, WI (US)
Assigned to D3MAX, LLC, Grand Forks, ND (US)
Filed by D3Max, LLC, Grand Forks, ND (US)
Filed on May 25, 2022, as Appl. No. 17/804,052.
Application 17/804,052 is a continuation of application No. 17/200,053, filed on Mar. 12, 2021.
Claims priority of provisional application 62/989,423, filed on Mar. 13, 2020.
Prior Publication US 2022/0290191 A1, Sep. 15, 2022
Int. Cl. C12P 7/14 (2006.01); C07H 1/08 (2006.01); C12P 19/02 (2006.01)
CPC C12P 7/14 (2013.01) [C07H 1/08 (2013.01); C12P 19/02 (2013.01)] 16 Claims
 
1. A method for hydrolyzing lignocellulosic material, comprising:
flashing a lignocellulosic material in a flash drum to generate vapor;
feeding the lignocellulosic material into a recycling reactor at a feed rate;
adding at least one enzyme to the lignocellulosic material; and
recycling the lignocellulosic material and at least one enzyme through the recycling reactor at a recycle rate and a residence time to hydrolyze the lignocellulosic material to produce an amount of monomeric sugar in the lignocellulosic material,
wherein recycling comprises at least a portion of the lignocellulosic material and at least one enzyme exiting the recycling reactor and being recirculated back into the recycling reactor, and
wherein recycling the lignocellulosic material and the at least one enzyme reduces a viscosity of fresh lignocellulosic material entering the recycling reactor, and
wherein partially saccharified lignocellulosic material exiting the recycling reactor has a viscosity of 250 centipoise (cp) to 3000 cp.