US 11,987,754 B2
Solvolysis process for combined feedstock
Pekka Jokela, Helsinki (FI); Andrea Gutierrez, Helsinki (FI); Roel Westerhof, Enschede (NL); Sascha Kersten, Enschede (NL); and Bert Heesink, Enschede (NL)
Assigned to UPM-KYMMENE CORPORATION, Helsinki (FI)
Filed by UPM-KYMMENE CORPORATION, Helsinki (FI)
Filed on Dec. 19, 2022, as Appl. No. 18/083,895.
Claims priority of application No. 20216335 (FI), filed on Dec. 23, 2021.
Prior Publication US 2023/0203380 A1, Jun. 29, 2023
Int. Cl. C10B 53/02 (2006.01); C10G 1/02 (2006.01)
CPC C10B 53/02 (2013.01) [C10G 1/02 (2013.01); C10G 2300/1011 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A process for converting lignin to renewable liquid product(s), characterized in that the process comprises the following steps,
(a) providing a lignin feedstock (10);
(b) providing a solid second renewable feedstock;
(c) providing a solvent (20) comprising an oil fraction, at least partly produced by the process;
(d) preparing a feed mixture (30) by mixing a combined feedstock of the lignin feedstock (10) of step (a) and the second renewable feedstock of step (b) with the solvent (20) of step (c), wherein the ash content of the combined feedstock is below 4.5 wt %;
(e) followed by solvolysis of the feed mixture of step (d) by heating (110) the feed mixture (30) at a temperature between 360 and 420 ° C., under a pressure from 40 to 155 bar and maintaining said temperature and pressure for 2-60 minutes to obtain a product mix (40); and
(f) recirculating at least part of said product mix (40) as the oil fraction of said solvent (20) of step (c).