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Method for preparing bio-based 2, 5-hexanedione by taking cellulose as raw material

A hexanedione, bio-based technology, applied in the field of preparation of 2,5-hexanedione, achieves the effects of high reaction yield, mild reaction system, corrosion avoidance and recovery

Active Publication Date: 2022-08-09
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid acids such as hydrochloric acid used in this technology still have corrosion and recovery problems, and the noble metal catalysts used also increase the cost of producing 2,5-hexanedione

Method used

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  • Method for preparing bio-based 2, 5-hexanedione by taking cellulose as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Nickel chloride (1.0 mmol) and hexadecylamine (10 mmol) were mixed with hexadecene (10 mL) and triphenyl phosphite (10 mmol), and the mixture was stirred under vacuum at 120 °C for one hour, then the temperature was raised to 300 °C again. Stirring for two hours under argon gave a black colloidal solution. After the mixture was cooled to room temperature, the black product was isolated by acetone precipitation and dried to obtain Ni2P NPs.

[0026] The Ni2P NPs (30 mg) were dissolved in hexane (50 mL), sonicated for one hour, and then stirred with mordenite (1.0 g) at room temperature for 6 h. The resulting powder was vacuum-dried, and the obtained gray powder was Ni2P NPs / mordenite Zeolite. The following Ni2P NPs / mordenites were prepared by this method.

[0027] 0.1g of cellulose, 15mg of 3wt.% Ni2P NPs / mordenite, 10mL of 30% sodium chloride aqueous solution and 30mL of toluene were added to the reaction vessel, 2MPa hydrogen was passed through, and the reaction was ...

Embodiment 2

[0029] 0.1g of cellulose, 15mg of 3wt.% Ni2P NPs / mordenite, 10mL of 30% sodium chloride aqueous solution and 30mL of toluene were added to the reaction vessel, 2MPa hydrogen was passed through, and the reaction was carried out at 200°C for 6 hours to obtain The yield of 2,5-hexanedione was 75.3%.

Embodiment 3

[0031] 0.1g of cellulose, 15mg of 3wt.% Ni2P NPs / mordenite, 10mL of 30% potassium chloride aqueous solution and 30mL of toluene were added to the reaction vessel, 2MPa hydrogen was passed through, and the reaction was carried out at 130°C for 6 hours to obtain The yield of 2,5-hexanedione was 70.9%.

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Abstract

The invention discloses a method for preparing bio-based 2, 5-hexanedione by taking cellulose as a raw material, which is characterized in that the cellulose is directly converted into the 2, 5-hexanedione in one pot in a hydrogen atmosphere by adopting a neutral saline solution and organic solvent two-phase reaction system and taking A / B supported non-noble metal phosphide nanoparticles as a catalyst. The method has the characteristics of mild reaction system and high product selectivity, and provides an effective way for preparing 2, 5-hexanedione from cellulose.

Description

technical field [0001] The invention relates to the preparation of 2,5-hexanedione, in particular to a preparation method for one-pot synthesis of bio-based 2,5-hexanedione using cellulose as a raw material. Background technique [0002] The increasing scarcity of fossil resources, the increase in oil prices, the massive emission of greenhouse gases and the society's demand for energy make it urgent to find new energy sources that can replace fossil resources. Cellulose is an abundant and renewable glycogen that can be converted into fuels, chemicals, and thus has received extensive attention. [0003] 2,5-Hexanedione is an important organic chemical widely used in synthetic resins, electroplating, painting, colorants, pharmaceuticals, leather tanning agents and biomass fuels. [0004] There are many synthetic methods for 2,5-hexanedione, most of which use 5-hydroxymethylfurfural, 2,5-dimethylfuran, 2,5-hexanediol, 5-methylfurfural as raw materials, and hydrogenation throug...

Claims

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Application Information

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IPC IPC(8): C07C45/00C07C49/12B01J29/18B01J27/185
CPCC07C45/00B01J29/18B01J27/1853B01J35/23C07C49/12Y02P20/584
Inventor 郭凯李晓伟何伟唐薇薇
Owner NANJING UNIV OF TECH