Cogeneration method for sugar and acetylpropionic acid by utilizing lignocellulose-like biomass

A lignocellulosic and biomass technology, which is applied in the field of biomass resource utilization, can solve problems such as application limitations, and achieve the effects of low raw material cost, high yield and high industrial development value.

Inactive Publication Date: 2008-03-26
GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concentrated acid hydrolysis is limited in application due to the consumption of a large amount of inorganic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Co-production of sugar and levulinic acid from cotton stalks

[0012] Put the pre-crushed cotton stalks and 0.01mol / L dilute hydrochloric acid solution into the reaction kettle according to the ratio of 100kg and 500L, stir and mix well, heat to 90°C, stir and keep warm for 30 minutes, centrifugally filter, separate solid and liquid, and collect filter residues separately and solution, the filter residue was washed with an appropriate amount of water, and the washing liquid was combined into the filtrate to obtain a sugar solution, and the sugar content in the solution was 11kg (in terms of xylose and glucose mass). This solution can add 100kg pulverized cotton stalks again, repeat above-mentioned steps.

[0013] Each batch of remaining filter residue is about 70kg (dry weight), add 350L of 0.01mol / L dilute hydrochloric acid solution, put it into a high-pressure reactor, stir and mix, heat to 160°C, stir and keep warm for 100 minutes, cool and filter, filter ...

Embodiment 2

[0014] Example 2: Co-production of sugar and levulinic acid solution from corn stalks

[0015] Put the pre-crushed corn stalks (the composition of cellulose, hemicellulose and lignin is 40%, 28%, 11%) and 0.2mol / L dilute hydrochloric acid solution into the reaction kettle according to the ratio of 100kg and 1000L, stir and mix , heated to 110°C, stirred and incubated for 10 minutes, centrifuged, solid-liquid separated, respectively collected filter residue and solution, filter residue was washed with an appropriate amount of water, and the washing liquid was merged into the filtrate to obtain a sugar solution. The sugar content in the solution was 13kg ( Based on the mass of xylose and glucose).

[0016] For the remaining 65kg of filter residue (dry weight), add 650L of 0.2mol / L dilute hydrochloric acid solution, put it into a high-pressure reactor, stir and mix, heat to 2000°C, keep it warm for 10 minutes, cool and filter, and wash the filter residue with an appropriate amoun...

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PUM

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Abstract

The present invention is process of co-producing sugar and levulic acid solution with lignocellulose material, and belongs to the field of biomass resource utilizing technology. Agricultural and forestry waste as reaction material is dilute acid hydrolyzed in a two-step process at certain temperature and in the presence of 0.01-0.2 mol concentration hydrochloric acid solution, hydroiodic acid solution, sulfuric acid solution or other inorganic acid solution as catalyst to produce both sugar solution and levulic acid solution in the total conversion rate over 20 wt%. The present invention provides one new way for utilizing lignocellulose comprehensively.

Description

technical field [0001] The invention belongs to the technical field of biomass resource utilization, and relates to a method for preparing sugar and levulinic acid from lignocellulosic biomass. technical background [0002] The main components of lignocellulosic biomass include hemicellulose, cellulose, and lignin. Effective transformation and utilization of sugars in agricultural and forestry wastes to partially replace petrochemical products is one of the important research directions of renewable energy today. At present, the conversion and utilization of agricultural and forestry wastes mainly include direct combustion, pyrolysis, gasification, fermentation, enzymatic hydrolysis and acid hydrolysis. Among them, acid hydrolysis is divided into dilute acid hydrolysis and concentrated acid hydrolysis. The application of concentrated acid hydrolysis is limited due to the consumption of a large amount of inorganic acid. Dilute acid hydrolysis is mainly for the purpose of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H1/00C07C59/185C07C51/00
Inventor 张洪勋杨治广韩祯陈曦白志辉
Owner GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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