US 12,378,515 B2
Method for cleaning a reactor for processing a lignocellulosic biomass
Meriem Bouras, Rueil-Malmaison (FR); Caroline Aymard, Rueil-Malmaison (FR); and Olivier Carnnot, Baccones (FR)
Assigned to IFP Energies nouvelles, Rueil-Malmaison (FR); INSTITUT NATIONAL DE RECHERCHE POUR L'AGRICULTURE, L'ALIMENTATION ET L'ENVIRONNEMENT, Paris (FR); and AGRO INDUSTRIES RECHERCHE ET DEVELOPPEMENT, Pomacle (FR)
Appl. No. 17/416,213
Filed by IFP Energies nouvelles, Rueil-Malmaison (FR); INSTITUT NATIONAL DE RECHERCHE POUR L'AGRICULTURE, L'ALIMENTATION ET L'ENVIRONNEMENT, Paris (FR); and AGRO INDUSTRIES RECHERCHE ET DEVELOPPEMENT, Pomacle (FR)
PCT Filed Dec. 13, 2019, PCT No. PCT/EP2019/085107
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/126916, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1873757 (FR), filed on Dec. 21, 2018.
Prior Publication US 2022/0056395 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C12M 1/00 (2006.01); B08B 9/08 (2006.01); C12P 7/10 (2006.01); C12P 19/14 (2006.01)
CPC C12M 39/00 (2013.01) [B08B 9/08 (2013.01); C12M 21/12 (2013.01); C12M 23/58 (2013.01); C12P 7/10 (2013.01); C12P 19/14 (2013.01); B08B 2209/08 (2013.01); B08B 2230/01 (2013.01); C12P 2201/00 (2013.01); C12P 2203/00 (2013.01)] 14 Claims
 
1. A method for cleaning a reactor (4) for treating a lignocellulosic biomass (P), said method comprising the following sequence of steps:
a) draining the reactor of the reaction mixture containing the biomass,
b) filling the reactor with a basic aqueous solution (EB),
c) draining the reactor,
d) injecting steam (V) into the reactor,
e) filling the reactor with an aqueous solution (E),
f) draining the reactor, and
wherein, during draining step c), the basic solution drained is recovered for recycling, with optional filtration to remove solid residues (C).