US 12,215,119 B2
Method for obtaining low molecular weight lignin
Anu Minna Maaret Suonpää, Kaarina (FI); Matti Wilhelm Heikkilä, Kaarina (FI); Joana Raquel Amaral Antunes, Kaarina (FI); and Klara Birikh, Kaarina (FI)
Assigned to Metgen OY, Kaarina (FI)
Appl. No. 17/420,921
Filed by METGEN OY, Kaarina (FI)
PCT Filed Jan. 3, 2020, PCT No. PCT/EP2020/050089
§ 371(c)(1), (2) Date Jul. 6, 2021,
PCT Pub. No. WO2020/144115, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 19150546 (EP), filed on Jan. 7, 2019.
Prior Publication US 2022/0064200 A1, Mar. 3, 2022
Int. Cl. C07G 1/00 (2011.01); C08J 11/10 (2006.01)
CPC C07G 1/00 (2013.01) [C08J 11/10 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for producing lignin with a low molecular weight, the method comprising
contacting high molecular weight lignin with an alkaline laccase at alkaline pH in a reaction vessel, and
selectively removing lignin with a molecular weight below 2 kDa from the reaction vessel during the contacting.