METHOD FOR PRODUCING ETHANOL BY FERMENTATION FROM LIGNOCELLULOSIC BIOMASS
First Claim
1. A method of producing bioethanol by separating lignin from a crushed lignocelluloses biomass and obtaining cellulose and, if required, hemicelluloses and further processing of the cellulose or mixture of cellulose and hemicellulose to obtain sugars and subsequently obtain bioethanol, characterised in that crushed lignocelluloses biomass is treated with an alkanolamine for extracting the lignin therein, the lignin solution is separated, the residue containing cellulose/hemicellulose is converted to sugars without drying, and the sugars are fermented to obtain bioethanol.
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Abstract
The description relates to a method of producing bioethanol by separating lignin from a crushed lignocellulose biomass and obtaining cellulose and, if required, hemicellulose and additionally processing the cellulose or the mixture of cellulose and hemicellulose to form sugars and subsequently form bioethanol. The method is characterised in that crushed lignocelluloses biomass is treated with an alkanolamine for extracting the lignin therein, the lignin solution is separated, the residue containing cellulose/hemicellulose is converted to sugars without drying, and the sugars are fermented to obtain bioethanol. The raw cellulose (cellulose/hemicellulose), owing to its high reactivity, can easily be converted into sugar, which can be fermented to form bioethanol.
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Citations
15 Claims
- 1. A method of producing bioethanol by separating lignin from a crushed lignocelluloses biomass and obtaining cellulose and, if required, hemicelluloses and further processing of the cellulose or mixture of cellulose and hemicellulose to obtain sugars and subsequently obtain bioethanol, characterised in that crushed lignocelluloses biomass is treated with an alkanolamine for extracting the lignin therein, the lignin solution is separated, the residue containing cellulose/hemicellulose is converted to sugars without drying, and the sugars are fermented to obtain bioethanol.
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