Back to results
US 2013/0172628 A1Published application
Organosolv process
AssigneeLignol Innovations Ltd.
InventorsAlex BERLIN, Mikhail Y. BALAKSHIN, Raymond MA, Vera MAXIMENKO GUTMAN, Darwin ORTIZ
Life of this patent
Estimating the term…
Abstract
The present disclosure provides an organosolv biorefining process. The present process comprises treating a lignocellulosic biomass in the presence of a solvent and under certain conditions to separate at least a part of the lignin from the biomass.
Claims21
An organosolv process for treating a lignocellulosic biomass, comprising:
- a. adding the biomass to a reaction vessel and exposing the biomass to a solvent wherein:
- i. the ratio of solvent to biomass is from about 10:1 to about 4:1;
- ii. the solvent comprises from 40 to 60% w/w ethanol;
- iii. from about 1.5% to about 2.5% (based on dry weight wood) of an acid is added;
- b. elevating the temperature of the biomass/solvent mixture to from about 140° C. to about 170° C. for a total period of from about 50 minutes to about 200 minutes to form a pulp and an extraction liquor said liquor comprising derivatives of native lignin;
- c. recovering at least a portion of the extraction liquor;
- and
- d. recovering at least a portion of the pulp;
- wherein the pressure in the reaction vessel is about 18 bar or less.
6 more elements
(canceled)
An organosolv process for treating a lignocellulosic biomass, comprising:
- a. adding the biomass to a reaction vessel and exposing the biomass to a solvent wherein:
- i. the ratio of solvent to biomass is from about 10:1 to about 4:1;
- ii. the solvent comprises from 40 to 60% w/w ethanol;
- iii. the initial pH of the biomass/solvent mixture is from about 1.5 to about 2.5;
- b. elevating the temperature of the biomass/solvent mixture to from about 140° C. to about 170° C. for a total period of from about 50 minutes to about 200 minutes to form a pulp and an extraction liquor said liquor comprising derivatives of native lignin;
- c. recovering the extraction liquor;
- and
- d. recovering the pulp;
- wherein the pressure in the reaction vessel is about 18 bar or less.
6 more elements
Dependencies are inferred from the claim text.