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Method for preparing organic acid by oxidative degradation of biomass and prepared organic acid

A technology of oxidative degradation and biomass, which is applied in the direction of oxidative preparation of carboxylic acids, chemical instruments and methods, and preparation of organic compounds. It can solve the problems of harsh reaction conditions, polluting the environment, and many residues, and achieves mild reaction conditions and ecological protection. Environment, less residue effect

Inactive Publication Date: 2018-03-23
JILIN AGRI SCI & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of high energy consumption, high cost, harsh reaction conditions, many residues, and environmental pollution existing in existing biomass degradation and utilization methods, the present invention provides a method for preparing organic acids by oxidative degradation of biomass and the obtained organic acid acid

Method used

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Effect test

Embodiment 1

[0039] Biomass oxidative degradation of the present invention prepares the method for organic acid, at first bacterial chaff and acetic anhydride are mixed evenly under magnetic stirring according to the solid-liquid ratio of 1g:25ml, drip 30% hydrogen peroxide, 30% hydrogen peroxide through constant pressure dropping funnel Continuous dripping is required, and the dripping should be completed within 1 hour. The ratio of acetic anhydride to 30% hydrogen peroxide is 1:2; oxidize the above mixture at 65°C for 24 hours; obtain the oxidized solution after filtration; evaporate to dryness in a water bath Finally, a residue is obtained; the residue is separated by column chromatography to obtain an organic acid.

Embodiment 2

[0041] According to the method for preparing organic acid by oxidative degradation of biomass in the present invention, first, biomass (the mixture of corn stalks and bean stalks) and acetic anhydride are uniformly mixed under magnetic stirring according to a solid-liquid ratio of 1g:5ml, and passed through a constant pressure dropping funnel Add 30% hydrogen peroxide dropwise, 30% hydrogen peroxide needs to be added dropwise, and the dropwise addition should be completed within 1 hour, the ratio of acetic anhydride to 30% hydrogen peroxide is 1:2; oxidize the above mixture at 35°C for 24 hours; filter Finally, an oxidized solution is obtained; the obtained oxidized solution is extracted with methanol and concentrated to obtain a residue; the residue is separated by column chromatography to obtain an organic acid.

Embodiment 3

[0043] In the method for preparing organic acid by oxidative degradation of biomass of the present invention, at first sawdust and acetic anhydride are mixed evenly under magnetic stirring according to the solid-liquid ratio of 1g:30ml, and 30% hydrogen peroxide is added dropwise through a constant pressure dropping funnel, 30% hydrogen peroxide needs Continue to add dropwise, and complete dropwise within 1h, the ratio of acetic anhydride to 30% hydrogen peroxide is 1:2; oxidize the above mixture at 50°C for 48h; obtain the oxidized solution after filtration; evaporate to dryness in a water bath A residue was obtained; the residue was separated by column chromatography to obtain an organic acid.

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Abstract

The invention discloses a method for preparing organic acid by oxidative degradation of biomass and a prepared organic acid, which relate to the field of biomass reuse and solve the problems of high energy consumption, high cost, harsh reaction conditions, large residue amount and environment pollution existing in conventional biomass degradation and utilization methods. The method comprises the following steps: biomass and acetic anhydride are uniformly mixed according to a solid-liquid ratio of 1g:(5ml to 30ml) under magnetic stirring, and 30 percent of hydrogen peroxide is dripped by a constant-pressure drop funnel; the mixture is oxidized under the condition of 35 DEG C to 85 DEG C for 6 to 48 hours; filtration is performed to obtain an oxidized solution; the oxidized solution is driedby evaporation in water bath, so as to obtain residue; and the residue is separated by column chromatography, so that the organic acid is obtained. By oxidatively degrading an organic matter in the biomass under mild conditions, the chemical with high added value-the organic acid can be obtained, establishing a novel method for the application of biomass. The method has the advantages of low energy consumption, low cost, less residue and no environment pollution.

Description

technical field [0001] The invention relates to the technical field of biomass reuse, in particular to a method for preparing organic acid by oxidative degradation of biomass and the prepared organic acid. Background technique [0002] Biomass refers to any renewable or recyclable organic matter derived from animals, plants, microorganisms and excreted and metabolized by these organisms, mainly various herbs, woody plants, and organic waste in municipal solid waste, Seaweed and livestock manure, etc. [0003] It can be seen from the current situation of biomass utilization in the world that most countries are converting biomass into high-density and high-grade biofuels for energy use as the main development direction, which is an effective way to utilize biomass energy. From a chemical point of view, biomass is a valuable and high-quality chemical resource. Biomass is mostly composed of cellulose, hemicellulose and lignin (except algae biomass), and also contains oil and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/285C07C51/31C07G1/00C07G99/00
CPCC07C51/285C07C51/31C07G1/00C07G99/00
Inventor 薛晓丽宗志敏孔令瑶郑全喜徐丹丹魏贤勇
Owner JILIN AGRI SCI & TECH COLLEGE
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