US 11,891,576 B2
Processes for obtaining substances from bark and a composition containing bark for use in the processes
Joseph Samec, Stockholm (SE); and Ivan Kumaniaev, Uppsala (SE)
Assigned to KAT2BIZ AB, Stockholm (SE)
Appl. No. 17/615,517
Filed by KAT2BIZ AB, Stockholm (SE)
PCT Filed Jun. 26, 2020, PCT No. PCT/SE2020/050670
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2020/263170, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 1950818-3 (SE), filed on Jun. 28, 2019.
Prior Publication US 2022/0306941 A1, Sep. 29, 2022
Int. Cl. C10G 3/00 (2006.01); C08H 8/00 (2010.01); C10G 1/04 (2006.01)
CPC C10G 1/047 (2013.01) [C08H 8/00 (2013.01); C10G 3/50 (2013.01); C10G 2300/1014 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/44 (2013.01); C10G 2400/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for at least partly dissolving bark containing a suberin component in a solvent system and for at least partly depolymerizing the suberin component, the process comprising the following steps:
providing bark;
providing a solvent system comprising water and a base selected from tertiary aliphatic amines;
treating the bark with the solvent system by subjecting the bark to the solvent system at a temperature of at least 160° C., thereby obtaining a composition containing at least partly dissolved substances of bark, of which substances the suberin component is at least partly depolymerized.