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Method for preparing ethyl levulinate from deoxyribose

A technology of ethyl levulinate and deoxyribose, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as increased cost and complicated process, and achieves improved production efficiency and method. Simple, mild reaction conditions

Inactive Publication Date: 2017-11-07
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation step involves conditions such as hydrogenation catalyst, high pressure and hydrogen, which complicates the process and increases the cost

Method used

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  • Method for preparing ethyl levulinate from deoxyribose
  • Method for preparing ethyl levulinate from deoxyribose
  • Method for preparing ethyl levulinate from deoxyribose

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Add 1.8g deoxyribose, 3.6g cation exchange resin 70, and 40ml methylal to the reactor at room temperature and mix, so that the deoxyribose is completely dissolved in the solvent, and purify the reactor three times with high-purity nitrogen to remove the Residual gas was present, followed by heating to 130° C. within 10 minutes and stirring for 2 hours to yield the product.

Embodiment 2

[0030] Add 10.8g of deoxyribose, 4.0g of cation exchange resin 70, and 80ml of methylal into the reactor respectively, so that the deoxyribose is completely dissolved in the solvent, and then heated to 140°C within 10 minutes and stirred for 2 hours to obtain levulinic acid Ethyl ester product; Wherein, stirring speed is 600rpm.

Embodiment 3

[0032] Add 1.8g of deoxyribose, 3.6g of cation exchange resin 70, and 40ml of formal into the reactor respectively, so that the deoxyribose is completely dissolved in the solvent, and then heated to 150°C within 10 minutes and stirred for 2 hours to obtain levulinic acid Ethyl ester product; Wherein, stirring speed is 600rpm.

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Abstract

The invention provides a method for preparing ethyl levulinate from deoxyribose. The method comprises the following steps: respectively adding deoxyribose, cation exchange resin 70 and a solvent into a reactor so as to completely dissolve deoxyribose into the solvent, and then heating to 130 to 160DEG C within 10 minutes and stirring for 2-6 hours to obtain ethyl levulinate product, wherein the stirring speed is 600rpm, and the solvent is dimethoxymethane or dimethoxymethane and cosolvent. By using the method, deoxyribose can be converted into ethyl levulinate in one step, hydrogenation reaction is unnecessary in the process, the reaction conditions are mild, the method is simple, C6 polysaccharide derived from cellulose, C5 polysaccharide derived from hemicellulose, and furan compounds (furfural and hydroxymethylfurfural) can be converted into ethyl levulinate through the same acid catalysis technology. The production efficiency of ethyl levulinate extracted from biomasses can be greatly increased, and the chemical diversity of platform molecules and the production efficiency of biofuel can be greatly improved.

Description

technical field [0001] The invention relates to a preparation process of ethyl levulinate, in particular to a method for preparing ethyl levulinate from deoxyribose. Background technique [0002] In the presence of inorganic acid, the yield of ethyl levulinate produced by hydrolysis of biomass is about 10-30%. The main reasons for the low yield are: ① sugars are polymerized during the conversion into ethyl levulinate; ② under the catalysis of acid, only the C6 sugar substrates in cellulose and hemicellulose can be converted into acetyl Ethyl propionate, while the C5 sugar group (deoxyribose, arabinose unit, etc.) under the same conditions, is mainly converted into furfural, which is the internal reason for the low yield of ethyl levulinate in biomass. [0003] C5 sugars can also be converted to ethyl levulinate, but through multiple steps, including: acid-catalyzed conversion of C5 sugars under liquid phase conditions to furfural, followed by hydrogenation of furfural under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/00C07C69/716
CPCC07C67/00C07D307/46C07D307/48C07C69/716
Inventor 章展铭胡勋李娇娇于振杰高璟旭王璐平
Owner UNIV OF JINAN
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