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1. (WO2018162207) PROCESS FOR THE SIMULTANEOUS EXTRACTION OF LIGNIN AND SILICA FROM BIOMASS AND ELASTOMER REINFORCED WITH A MIXTURE OF LIGNIN AND SILICA

Pub. No.:    WO/2018/162207    International Application No.:    PCT/EP2018/053868
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Sat Feb 17 00:59:59 CET 2018
IPC: C08L 97/02
C08L 1/02
Applicants: COMPAGNIE INDUSTRIELLE DE LA MATIERE VEGETALE - CIMV
Inventors: BENJELLOUN MLAYAH, Bouchra
DELMAS, Michel
Title: PROCESS FOR THE SIMULTANEOUS EXTRACTION OF LIGNIN AND SILICA FROM BIOMASS AND ELASTOMER REINFORCED WITH A MIXTURE OF LIGNIN AND SILICA
Abstract:
The invention relates to a process for the simultaneous extraction of lignin and silica from lignocellulosic plant material, characterized in that it comprises the steps of: a) fractionating the lignocellulosic plant material in the presence of an acid solution, so as to obtain a solid fraction comprising cellulose, residual lignin and silica; b) extracting simultaneously lignin and silica from the solid fraction obtained in step a) with a basic solution, at a pH between 10 and 13 and at a temperature between 70°C and 90°C, so as to obtain a liquid phase comprising lignin and silica, and a solid phase; c) separating the liquid phase and of the solid phase obtained in step b), d) coprecipitating a mixture of lignin and silica comprised in the liquid phase, at a pH between 5 and 6.