Method for increasing the concentration of xylose in lignocellulosic hydrolysate
First Claim
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1. A method for increasing the concentration of xylose in lignocellulosic hydrolysate comprising the steps of:
- extruding lignocellulosic material and mixing the lignocellulosic material with diluted acid at a feed rate of between about 6 and 7 kg/hr and a flow rate of between about 12 and 14 kg/hr, wherein the speed of a rotational screw is between about 30 and 150 rpm at the barrel temperature of 80-160°
C., creating a mixture;
feeding the resulting mixture into a hot-water extraction tank and cooking the mixture at an average temperature of 130-160°
C. for 10-30 minutes; and
separating the liquids from the solids using a solid separating device to produce a lignocellulosic hydrolysate;
wherein the concentration of the xylose in the lignocellulosic hydrolysate is 40 to 60 g/L and wherein the yield of the xylose is 70% to 90%.
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Abstract
Disclosed is a method for increasing the concentration of xylose in lignocellulosic hydrolysate. The method includes the step of extruding lignocellulosic material and mixing the lignocellulosic material with diluted acid and the step of conducting hot-water extraction on the mixture. Hence, the concentration of the xylose in the lignocellulosic hydrolysate can achieve a high concentration of 60 g/L, and the yield of the xylose can reach to 90%.
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11 Claims
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1. A method for increasing the concentration of xylose in lignocellulosic hydrolysate comprising the steps of:
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extruding lignocellulosic material and mixing the lignocellulosic material with diluted acid at a feed rate of between about 6 and 7 kg/hr and a flow rate of between about 12 and 14 kg/hr, wherein the speed of a rotational screw is between about 30 and 150 rpm at the barrel temperature of 80-160°
C., creating a mixture;feeding the resulting mixture into a hot-water extraction tank and cooking the mixture at an average temperature of 130-160°
C. for 10-30 minutes; andseparating the liquids from the solids using a solid separating device to produce a lignocellulosic hydrolysate;
wherein the concentration of the xylose in the lignocellulosic hydrolysate is 40 to 60 g/L and wherein the yield of the xylose is 70% to 90%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification