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Detoxification method of wood fibre hydrolysis sugar liquid

A technology for hydrolyzing sugar liquid and wood fiber, which is applied in the field of detoxification of wood fiber hydrolysis sugar liquid, and can solve the problem of secondary pollution of solvents, etc.

Inactive Publication Date: 2010-04-07
NANJING FORESTRY UNIV
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Problems solved by technology

[0005] Complexation extraction is an extraction and separation method based on a reversible complexation reaction. It overcomes the large loss of polar solvents in production and the environmental impact caused by the selection of extraction agents based on the "like dissolves like" rule in physical extraction. "Secondary pollution" and other problems; and the complex extraction method overcomes the shortcomings of some chemical separation processes that consume a large amount of expensive reactants and the chemical form of the reaction product changes, so it has a wide range of industrial application values

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  • Detoxification method of wood fibre hydrolysis sugar liquid
  • Detoxification method of wood fibre hydrolysis sugar liquid

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[0019] The raw material is pre-hydrolyzed sugar solution obtained from corn stalks obtained by dilute sulfuric acid pretreatment process, and concentrated by vacuum evaporation. The main sugar components and fermentation inhibitors before and after concentration were analyzed by high performance liquid chromatography (HPLC), and the absorption value at 280nm (λ 280 ) was determined using a UV spectrophotometer. The changes of main components before and after concentration of the prehydrolyzed sugar solution are shown in Table 1.

[0020] Table 1 Changes in main components of dilute acid pretreatment hydrolyzed sugar solution before and after vacuum concentration

[0021]

[0022] Using a mixture of trialkylamine, n-octanol and kerosene in a certain proportion as a complex extraction agent, the concentrated prehydrolyzed sugar solution is complex extracted. The following are the effects of extraction equilibrium time, water-oil ratio, extraction temperature and complexing ...

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Abstract

The invention provides a detoxification method of wood fibre hydrolysis sugar liquid, which takes prehydrolysis sugar liquid concentration solution of the dilute sulphuric acid pretreatment cornstalks as raw materials. The invention is characterized in that the mixture which is prepared by trialkylamine, n-caprylic alcohol and kerosene is taken as complexing extracting agent; and carrying out complexing extraction and detoxification on the concentrated prehydrolysis sugar liquid under the condition of room temperature. In the concentrated prehydrolysis sugar liquid after complexing extraction, the removal rate of the main inhibitor acetic acid exceeds 70%; the removal rate of hydromethyl furfural exceeds 40%; the removal rate of furfural reaches 100%; and simultaneously, part of the lignin degradation products are removed.

Description

1. Technical field [0001] The invention belongs to the field of biochemical biodegradation and biotransformation of lignocellulosic raw materials to produce fuel ethanol, chemical platform compounds and other bio-based products, and particularly relates to a method for detoxification of lignocellulosic raw material hydrolyzed sugar liquid by complex extraction technology. 2. Background technology [0002] In the process of biologically producing ethanol, chemical platform compounds and other bio-based products from lignocellulosic raw materials, due to the compact structure of lignocellulosic raw materials, cellulose is difficult to be hydrolyzed into monosaccharides by cellulase, so it must be hydrolyzed before cellulase Pretreatment is performed to increase the accessibility of cellulose to cellulase enzymes. Raw material pretreatment methods mainly include physical method, chemical method, biological method and the combination of the above methods. Among various raw mater...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12P1/00C12R1/84
CPCY02E50/16Y02E50/10
Inventor 余世袁朱均均勇强徐勇
Owner NANJING FORESTRY UNIV
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