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Green preparation method of levoglucosone having high added value

A L-glucosone, high value-added technology, applied in the preparation of sugar derivatives, chemical instruments and methods, dehydrated sugars, etc., can solve problems such as low yield of L-glucosone, achieve low price, reduce corrosion and pollution, select good effect

Inactive Publication Date: 2014-03-12
湖南清欣绿色环保有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a green method for preparing high-value-added L-glucosone, which overcomes the shortcomings of previous processes, such as corrosiveness, pollution, and low yield of L-glucosone.

Method used

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  • Green preparation method of levoglucosone having high added value

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Effect test

Embodiment 1

[0027] Mechanically mix 5g of microcrystalline cellulose and 5g of zinc phosphate (mass ratio is 0.01:1) and then pyrolyze it at 200 ℃ under anaerobic conditions. The pyrolysis time is 2 hours. Bio-oil containing L-glucosone, from which L-glucosone is isolated.

Embodiment 2

[0029] Mechanically mix 5g of microcrystalline cellulose and 5g of zinc phosphate (mass ratio is 50:1) and then pyrolyze it at 450°C under anaerobic conditions. The product is condensed and the liquid is collected, which is the bio oil, and then separate out L-glucosone.

Embodiment 3

[0031] Mechanically mix 10g of microcrystalline cellulose and 5g of zinc phosphate (mass ratio: 100:1) and then pyrolyze at 700°C under anaerobic conditions. The pyrolysis time is 2 hours. After the product is condensed, the liquid is collected, which contains The bio-oil of L-glucosone, and then isolate the L-glucosone.

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Abstract

The invention relates to a green preparation method of levoglucosone having a high added value. The green preparation method comprises the following steps that 1, cellulose or wood fiber-like biomass contacts with a phosphate, the phosphate is a monophosphate or a phosphate-containing mixture, and a mass ratio of the phosphate to the wood fiber-like biomass mixed mechanically is in a range of 0.01: 1-100: 1; and 2, under the oxygen-free condition, the mixture obtained by the step 1 is subjected to pyrolysis at a temperature of 200-700 DEG C for more than 0.0001s; the pyrolysis product is condensated; and the condensate is collected; and levoglucosone is separated from the condensate. The wood fiber raw material is common and can be obtained easily. The phosphate has a low price, good stability and a low pyrolysis temperature. Levoglucosone has high selectivity. Through use of the phosphate which has a low price and can be recycled, a production cost, acid corrosion and acid pollution are reduced. The green preparation method is a green, economic and effective method for preparing levoglucosone.

Description

technical field [0001] The invention relates to a green method for preparing high value-added glucosone. The invention belongs to the technical field of levoglucosone preparation. Background technique [0002] The bio-oil obtained from biomass pyrolysis has high utilization value. It can not only be used as a substitute resource for fossil energy, but also can be refined to obtain many high-value chemicals, such as furfural (FF), levoglucosone (LGO) , levoglucosan (LG), 1,4:3,6-dianhydro-D-glucopyranose (DGP), glycolaldehyde (HAA), 5-hydroxymethylfurfural (HMF), etc. However, because the bio-oil produced by non-catalytic pyrolysis has many and complex components, it is very difficult to extract a single component for large-scale production. [0003] Levoglucosenone (1,6-anhydro-3,4-dideoxy-β-D-pyranose-2-one) is an important pyrolysis product of cellulose under the action of an acid catalyst. Its structure was identified in 1973. Levoglucosone (LGO) It is an optically ...

Claims

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Application Information

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IPC IPC(8): C07H3/10C07H1/00
Inventor 夏海岸葛跃杰肖媛元朱亚琦左宋林
Owner 湖南清欣绿色环保有限公司
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