Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing 5-methylfurfural by selective hydrogenation of 5-hydroxymethylfurfural

A technology of hydroxymethylfurfural and methylfurfural, which is applied in the field of chemical reactions, can solve the problems of 5-methylfurfural instability, strong HI corrosivity, and reduced yield, so as to achieve good industrialization prospects, improve conversion rate, and protect the environment friendly effect

Active Publication Date: 2019-12-31
NANJING FORESTRY UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this process, 67% yield of 5-methylfurfural can be directly obtained from fructose within 2 hours at 75 °C, but 5-methylfurfural is unstable under the reaction conditions, and longer reaction time leads to 5-methylfurfural Decompose and reduce the yield, and HI is highly corrosive, it is not easy to recycle after the reaction is completed, and the pollution is relatively large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing 5-methylfurfural by selective hydrogenation of 5-hydroxymethylfurfural
  • A method for preparing 5-methylfurfural by selective hydrogenation of 5-hydroxymethylfurfural
  • A method for preparing 5-methylfurfural by selective hydrogenation of 5-hydroxymethylfurfural

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 0.25 g 5-hydroxymethylfurfural, 0.05 g Pd-PVP / ZrO 2 Catalyst (PVP:Pd=2:1 (molar ratio)), 10mL THF, 1 mL formic acid were added to a 50 mL autoclave, and reacted at a temperature of 100 °C for 10 h, and the product was determined by high performance liquid chromatography for 5-hydroxymethyl Content of furfural and 5-methylfurfural. The conversion rate of 5-hydroxymethylfurfural was 36.84%, the yield of 5-methylfurfural was 26.47%, and the selectivity was 71.86%.

Embodiment 2

[0036] 0.25 g 5-hydroxymethylfurfural, 0.05 g Pd-PVP / ZrO 2 Catalyst (PVP:Pd=2:1 (molar ratio)), 10mL THF, 1 mL formic acid were added to a 50 mL autoclave, and reacted at a temperature of 140 °C for 10 h, and the product was determined by high performance liquid chromatography for 5-hydroxymethylfurfural and 5-methylfurfural content. The conversion rate of 5-hydroxymethylfurfural was 44.19%, the yield of 5-methylfurfural was 33.67%, and the selectivity was 76.18%.

Embodiment 3

[0038] 0.25 g 5-hydroxymethylfurfural, 0.05 g Pd-PVP / ZrO 2 Catalyst (PVP:Pd=2:1 (molar ratio)), 10mL THF, 1 mL formic acid were added to a 50 mL autoclave, and reacted at a temperature of 180 °C for 10 h, and the product was determined by high performance liquid chromatography 5-Hydroxymethylfurfural and 5-methylfurfural content. The conversion rate of 5-hydroxymethylfurfural was 59.39%, the yield of 5-methylfurfural was 46.73%, and the selectivity was 78.68%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing 5-methylfurfural through selectively hydrogenating 5-hydroxymethylfurfural. The method comprises the following steps: adding the 5-hydroxymethylfurfural, a solvent, a catalyst and a hydrogen supply reagent into a reactor to form a reaction system; and carrying out a hydrogenation reaction at a temperature of 20-300 DEG C in order to prepare the 5-methylfurfural at a high yield. The method overcomes the disadvantages of easy device corrosion, high price and difficult recycling of HCl, HI and other reaction reagents used in the prior art. The catalyst used in the invention has the characteristics of high efficiency, greenness, environmental protection, few side products, easiness in separation and recovery, and recycling.

Description

technical field [0001] The invention relates to a method for preparing 5-methylfurfural by selective hydrogenation of 5-hydroxymethylfurfural, belonging to the technical field of chemical reactions. Background technique [0002] Non-renewable fossil energy represented by coal, oil, and natural gas constitutes the backbone of the energy, material, and chemical industries in the world today, and has made great contributions to human civilization and development. However, with the depletion of these fossil resources and the increasing demand for energy and resources in developing countries, at the same time, the massive combustion and use of fossil energy has also caused environmental problems such as the greenhouse effect. Therefore, countries around the world are vigorously developing renewable green new energy and green chemicals. 5-Hydroxymethylfurfural converted from cellulose is an important biomass platform substance, which can be made into a variety of important compou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 夏海岸安佳欢孙国瀚谢勇飞杨莉左宋林
Owner NANJING FORESTRY UNIV