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 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 as a solvent for extracting the lignin therein for at least 10 minutes at a temperature of about 80°
- C. to 150°
C., the extraction of lignin carried out in the absence of caustic soda;
the lignin solution is separated;
the residue containing cellulose/hemicellulose is converted to sugars without drying;
the sugars are fermented to obtain bioethanol; and
wherein before the extraction of the lignin, the lignocellulose biomass is treated with ammonia gas or aqueous ammonia solution.
2 Assignments
0 Petitions
Accused Products
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 characterized 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.
7 Citations
19 Claims
-
1. A method of producing bioethanol by separating lignin from a crushed lignocelluloses biomass and obtaining cellulose 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 as a solvent for extracting the lignin therein for at least 10 minutes at a temperature of about 80°
- C. to 150°
C., the extraction of lignin carried out in the absence of caustic soda;the lignin solution is separated; the residue containing cellulose/hemicellulose is converted to sugars without drying; the sugars are fermented to obtain bioethanol; and wherein before the extraction of the lignin, the lignocellulose biomass is treated with ammonia gas or aqueous ammonia solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- C. to 150°
Specification
-
- Resources
-
Current AssigneeKlingele Golfkarton C.V.
-
Original AssigneeZylum Beteiligungsgesellschaft Mbh & Co. Patente Ii KG (Deutsche Bank Group)
-
InventorsKarstens, Ties
-
Primary Examiner(s)Weber, Jon P
-
Assistant Examiner(s)JOHNSON, KARA D
-
Application NumberUS12/922,186Publication NumberTime in Patent Office2,100 DaysField of Search435/161, 435/165US Class Current435/165CPC Class CodesC12P 7/10 substrate containing cellul...D21C 3/20 with organic solvents or in...Y02E 50/10 Biofuels, e.g. bio-diesel
