US 12,084,811 B2
Lignocellulosic biomass based process for production of lignins and syngas, and electricity production efficient syngas
Michel Delmas, Auzeville-Tolosane (FR)
Assigned to Société Bioeb, Auzeville-Tolosane (FR)
Appl. No. 16/969,671
Filed by Société BIOEB, Auzeville-Tolosane (FR)
PCT Filed Feb. 14, 2019, PCT No. PCT/EP2019/053622
§ 371(c)(1), (2) Date Aug. 13, 2020,
PCT Pub. No. WO2019/158624, PCT Pub. Date Aug. 22, 2019.
Claims priority of application No. 18157075 (EP), filed on Feb. 16, 2018.
Prior Publication US 2021/0009908 A1, Jan. 14, 2021
Int. Cl. D21C 3/00 (2006.01); C08B 37/00 (2006.01); C08H 7/00 (2011.01); C10J 3/72 (2006.01); D21C 3/04 (2006.01); D21C 3/20 (2006.01); D21C 9/02 (2006.01); D21C 9/18 (2006.01); D21C 11/00 (2006.01); D21H 11/02 (2006.01)
CPC D21C 3/003 (2013.01) [C08B 37/0057 (2013.01); C08H 6/00 (2013.01); C10J 3/72 (2013.01); D21C 3/04 (2013.01); D21C 3/20 (2013.01); D21C 9/02 (2013.01); D21C 9/18 (2013.01); D21C 11/0007 (2013.01); D21H 11/02 (2013.01); C10J 2300/092 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lignocellulosic biomass based process for production of:
non-oxidized, non-degraded and uncombined lignins with a controlled aliphatic hydroxyl content and controlled phenolic hydroxyl content; and
synthetic gas
said process comprising the following steps:
a) extracting lignins and hemicellulose by putting at least one solid lignocellulosic raw material in the presence of a mixture, composed of at least water and formic acid, at atmospheric pressure under controlled conditions of a first temperature between 80° C. and 90° C., with a dilution ratio of said at least one solid lignocellulosic raw material/liquid mixture comprised between 1 and 15, and for a determined period of time to extract the lignins and the hemicellulose from the at least one solid lignocellulosic raw material, wherein the formic acid comprises 85 wt % of the mixture;
b) fractionating, at atmospheric pressure, a primary solid fraction and a first portion of a primary liquid fraction obtained at an end of the preceding extracting step a) and washing the primary solid fraction with formic acid to provide a second portion of the primary liquid fraction and combining the first portion and the second portion of the primary liquid fraction;
c) concentrating the primary liquid fraction under vacuum at a second temperature between 40° to 50° C. until the primary liquid fraction comprises a dry matter content of 50 to 60 wt % and then separating all or part of organic acids contained in said primary liquid fraction and obtaining an intermediate liquid fraction;
d) separating the lignins from said intermediate liquid fraction by diluting the intermediate liquid fraction with water and then filtering to recover the lignins and obtain a residual liquid fraction; and,
e) gasifying at least one of at least part of said primary solid fraction or at least part of said residual liquid fraction for producing synthetic gas.