Production of pure lignin from lignocellulosic biomass

Details Production of pure lignin from lignocellulosic biomass Production of pure lignin from lignocellulosic biomass

C - Chemistry, Metallurgy

12

P

C12P 7/22 (2006.01) C12P 7/10 (2006.01)

Patent

CA 2739451

The present invention is directed to a process of producing substantially pure lignin from lignocellulosic biomass, which comprises: pre-treating a lignocellulosic feedstock to produce a reactive lignin-carbohydrate mixture; biologically-reacting the carbohydrates in the mixture, separating remaining solids from the liquid fermentation products, and drying the resulting solids to yield a substantially pure lignin product. Optionally, the lignin product may be washed and subjected to a second hydrolysis step. Optionally, the lignin product may be further processed by hydrotreating and/or pyrolysis in order to yield desirable products such as fuel additives.

La présente invention porte sur un procédé de production de lignine sensiblement pure à partir d'une biomasse lignocellulosique, qui comprend : le prétraitement d'une matière première lignocellulosique pour produire un mélange lignine-glucide réactif; la réaction biologique des glucides dans le mélange, la séparation des matières solides restantes à partir des produits de fermentation liquides, et le séchage des matières solides résultantes pour obtenir un produit de lignine sensiblement pur. Facultativement, le produit de lignine peut être lavé et soumis à une seconde étape d'hydrolyse. Facultativement, le produit de lignine peut en outre être traité par hydrotraitement et/ou pyrolyse afin d'obtenir des produits désirables tels que des additifs de combustible.

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