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Ultrasonic-assisted purification method of xylose in eucalyptus wood hot water prehydrolyzate

A pre-hydrolyzate and purification method technology, applied in the direction of xylose production, sugar production, monosaccharides, etc., can solve the problems of difficult removal of fermentation inhibitors, low xylose loss rate, high production cost, etc., to avoid lignin removal The effect of low efficiency, improved purification efficiency, and reduced supplementary amount

Active Publication Date: 2021-04-30
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to effectively remove organic soluble impurities such as lignin and furfural in the hot water prehydrolyzate of eucalyptus, and realize high-value utilization of the hot water prehydrolyzate, the present invention provides a low xylose loss rate and high lignin removal rate Prehydrolyzate purification process to solve the problems of complex organic components, low xylose purity, difficult removal of fermentation inhibitors and high production costs in eucalyptus hot water prehydrolyzate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] After the eucalyptus hot water prehydrolyzate was centrifuged, the supernatant was taken and purified according to the following steps:

[0041] (1) The hot water prehydrolyzate of eucalyptus was treated with ultrasonic wave and calcium hydroxide under the conditions of normal temperature and pH value of 3.9. Among them, the ultrasonic treatment instrument is JY-98ⅢN, the ultrasonic power is 110W, the ultrasonic time is 10min, the dosage of calcium hydroxide is 1.5%, and the treatment time is 60min.

[0042] (2) Centrifuge the hydrolyzed solution treated with ultrasonic wave and calcium hydroxide, and take the supernatant. Centrifugation speed 4500rpm, centrifugation time 5min.

[0043] (3) The supernatant obtained in the step (2) is subjected to a stage of activated carbon treatment at normal temperature and a pH value of 8.97. Wherein, the dosage of activated carbon is 1%, and the treatment time is 5 minutes.

[0044] (4) Centrifuge the hydrolyzed solution after a ...

Embodiment 2

[0050] (1) The hot water prehydrolyzate of eucalyptus was treated with ultrasonic wave and calcium hydroxide under the conditions of normal temperature and pH value of 3.9. Among them, the ultrasonic treatment instrument is JY-98ⅢN, the ultrasonic power is 110W, the ultrasonic time is 10min, the dosage of calcium hydroxide is 1.5%, and the treatment time is 45min.

[0051] (2) Centrifuge the hydrolyzed solution treated with calcium hydroxide, and take the supernatant. Centrifugation speed 4500rpm, centrifugation time 5min.

[0052] (3) The supernatant obtained in the step (2) is subjected to a stage of activated carbon treatment at normal temperature and a pH value of 8.97. Wherein, the dosage of activated carbon is 1.0%, and the treatment time is 5 minutes.

[0053] (4) Centrifuge the hydrolyzed solution after a section of activated carbon treatment, and take the supernatant. Centrifugation speed 4500rpm, centrifugation time 5min.

[0054] (5) The supernatant obtained in ...

Embodiment 3

[0059] (1) The hot water prehydrolyzate of eucalyptus was treated with ultrasonic wave and calcium hydroxide under the conditions of normal temperature and pH value of 3.9. Among them, the ultrasonic treatment instrument is JY-98ⅢN, the ultrasonic power is 120W, the ultrasonic time is 5min, the dosage of calcium hydroxide is 1.0%, and the treatment time is 10min.

[0060] (2) Centrifuge the hydrolyzed solution treated with calcium hydroxide, and take the supernatant. Centrifugation speed 4500rpm, centrifugation time 5min.

[0061] (3) The supernatant obtained in the step (2) is subjected to a stage of activated carbon treatment at normal temperature and a pH value of 7.73. Wherein, the dosage of activated carbon is 0.5%, and the treatment time is 5 minutes.

[0062] (4) Centrifuge the hydrolyzed solution after a section of activated carbon treatment, and take the supernatant. Centrifugation speed 4500rpm, centrifugation time 5min.

[0063] (5) The supernatant obtained in s...

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PUM

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Abstract

The invention discloses a method for purifying xylose in eucalyptus wood hot water pretreatment hydrolyzate. Combined method to treat eucalyptus hydrothermal pre-hydrolyzate, to maximize the separation and removal of lignin, furfural and other soluble organic matter and impurities other than xylose in the pre-hydrolyzate, and to improve the purity of xylose in the pre-hydrolyzate to solve the problem of In the subsequent high-value utilization of xylose, there are problems of low xylose purity, difficult removal of fermentation inhibitors, and high production costs, so as to improve the utilization value of eucalyptus hydrothermal prehydrolyzate and realize the hemicellulose components of eucalyptus and other broad-leaved wood high value utilization.

Description

technical field [0001] The invention relates to a hydrolyzate purification method, in particular to a eucalyptus hot water pre-hydrolyzate purification method combining chemistry, physics and biology, and belongs to the field of biological refining. Background technique [0002] In recent years, the market demand for dissolving pulp has been increasing year by year. In the process of producing hardwood dissolving pulp by kraft method, hydrothermal pretreatment is generally carried out to dissolve part of the hemicellulose, so as to reduce the component separation process in the subsequent section. Reduced chemical consumption, improved dissolving pulp quality. During the production process of prehydrolyzed kraft dissolving pulp, a large amount of prehydrolyzed liquid will be produced, the moisture content in the prehydrolyzed liquid is high (>90%), and the sugar content of various hemicelluloses is also high, but various hemicelluloses The calorific value of plain sugar ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H3/02C13K13/00
CPCC13K13/002
Inventor 陈嘉川杨桂花吉兴香董吉冉
Owner QILU UNIV OF TECH