Cellulose for bioethanol production
AssigneeSixring Inc.
InventorsAlejandra Enriquez, Julie Greer, Markus Weissenberger, Alexandra Ostaszewski
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Abstract
A process to obtain glucose from a pretreated lignocellulosic biomass comprises providing a lignocellulosic biomass and contacting said lignocellulosic biomass to a modified Caro's acid composition for a period of time necessary to remove more than 98.5% of the lignin present in the lignocellulosic biomass and thus obtaining a solid stream and a liquid stream. The solid stream is exposed to an enzyme blend to produce a hydrolysate comprising sugars obtained from the hydrolysis of cellulose and hemicellulose. Optionally, the hydrolysate may be fermented to produce value-added products.
Claims19
A process to obtain a value-added product from a lignocellulosic biomass, said process comprising the steps of:
- providing a lignocellulosic biomass
- contacting said lignocellulosic biomass with a Caro's acid composition for a period of time necessary to remove more than 98.5% of the lignin present in said lignocellulosic biomass and thus obtaining a solid stream and a liquid stream,
- exposing said solid stream to an enzyme blend to produce a hydrolysate comprising sugars obtained from the hydrolysis of cellulose and hemicellulose, and
- fermenting said hydrolysate with a fermenting organism to produce a value-added product;
- and
- wherein said process is carried out at a temperature of less than 50° C.
A process to hydrolyze cellulose into glucose, said process comprising the following steps:
- providing a reaction vessel;
- providing a cellulose source into said reaction vessel in an aqueous medium, wherein said source of cellulose has a content of hemicellulose of less than 5%, and a kappa number of less than 2;
- exposing said cellulose source to an enzyme blend that is capable of converting said cellulose into glucose;
- optionally, recovering the solution comprising glucose;
- and
- wherein said process is carried out at a temperature of less than 50° C.
A process to convert cellulose into glucose, and optionally other value-added products, comprising the following steps:
- providing a reaction vessel;
- providing a cellulose source to said reaction vessel;
- wherein said source of cellulose having a content of hemicellulose of less than 5%, and a kappa number of less than 2;
- exposing said cellulose source to an enzyme blend that is capable of converting said cellulose into glucose;
- adding to said vessel an organism capable of converting the glucose into value-added products;
- and
- wherein said process is carried out at a temperature of less than 50° C.
Dependencies are inferred from the claim text.