Method for producing 2,5-dimethyl furan (2,5-DMF) by fructose one-step process

A technology of dimethylfuran and dimethylformamide, which is applied in the field of one-step preparation of 2,5-DMF, can solve the problems of difficulty in separating 5-HMF, poor selectivity, etc., and achieves good reusability and simple and easy experimental operation. The effect of large industrial application value
CN105175366AActive Publication Date: 2015-12-23ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2015-12-23

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Abstract

The invention discloses a method for producing 2,5-dimethyl furan (2,5-DMF) by a fructose one-step process. The method comprises the following steps: reacting under the conditions of 140 to 220 DEG C, 400 to1000rpm (revolutions per minute) and 0.5 to 4MPa by taking fructose as a raw materials, Ru / C and mixed liquid of AlCl3 and inorganic acid as catalysts and N,N-dimethylformamide as solvent; after reaction is ended, performing suction filtration on reaction liquid, and recovering Ru / C from a filter cake; performing aftertreatment on filtrate to obtain the product 2,5-dimethyl furan. According to the method disclosed by the invention, 2,5-DMF is produced from the fructose, which is wider in source and lower in price, instead of 5-HMF (5-hydroxymethylfurfural); the method has greater industrial application value; the course of the original two-step process is integrated into one step, therefore the problem that the intermediate product 5-HMF is difficult to separate can be effectively solved; the method has obvious innovation and simple and easy experiment operations; good 2,5-DMF yield can be obtained, and the molar yield reaches 66.3 percent.
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Description

(1) Technical field

[0001] The invention relates to a method for preparing 2,5-dimethylfuran (2,5-DMF), in particular to a method using fructose as a starting material and using Ru / C and Lewis-Bronster mixed acid as a catalyst, A method for preparing 2,5-DMF in one step. (2) Background technology

[0002] 2,5-DMF prepared by hydrogenolysis of the platform compound 5-hydroxymethylfurfural (5-HMF) obtained from the hydrolysis of carbohydrates is considered to be the most promising renewable biomass energy. Compared with traditional biomass energy-ethanol, 2,5-DMF has a higher boiling point (92-94°C vs. 78.4°C), higher octane number (119vs.111), easier to mix with gasoline, and more High energy density (31.5kJ·cm -3 vs. 23kJ·cm -3 ). At the same time, the vapor latent heat of 2,5-DMF is lower (0.30kJ·cm -3 vs. 0.71kJ·cm -3 ), the energy consumed by rectification and purification is lower.

[0003] The main method of producing 2,5-DMF is to catalyze the hydrogenolysis of ...

Claims

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