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A kind of method for preparing formic acid by biomass polyol

A biomass polyol and formic acid technology, which is applied in the direction of oxidative preparation of carboxylic acid, organic compound preparation, carboxylate preparation, etc., can solve the problems of low conversion rate and low reactivity, and achieve high catalyst activity and low energy consumption , the effect of mild reaction conditions

Active Publication Date: 2022-05-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the selectivity of the reaction, photocatalytic biomass polyol conversion is often carried out in alkaline solution, with H 2 o 2 As an oxidizing agent, there are also problems of low reactivity and low conversion rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 10mmol glycerol, 50mg 1mol% CuO / CeO 2 Disperse in 25mL water, add magnetons, replace with oxygen three times, keep the pressure at 0.5Mpa, and use light intensity 200mW / cm at 120°C 2 Visible light with a wavelength of 455nm was irradiated and reacted for 10 h. After the reaction was completed, it was quantified by HPLC. The conversion rate of glycerol was 100%, and the yield of formic acid was 98%.

Embodiment 2

[0026] 1.25mmol glycerin, 50mg 1mol% CuO / CeO 2 Disperse in 25mL water, add magnetons, replace with oxygen three times, keep the pressure at 0.5Mpa, and use light intensity 200mW / cm at 120°C 2 Visible light with a wavelength of 455nm was irradiated and reacted for 10 hours. After the reaction was completed, it was quantified by HPLC. The conversion rate of glycerol was 100%, and the yield of formic acid was 99%.

Embodiment 3

[0028] 12.5mmol glycerin, 50mg 1mol% CuO / CeO 2 Disperse in 25mL water, add magnetons, replace with oxygen three times, keep the pressure at 0.5Mpa, and use light intensity 200mW / cm at 120°C 2 Visible light with a wavelength of 455nm was irradiated for 10 hours. After the reaction, it was quantified by HPLC. The conversion rate of glycerol was 198%, and the yield of formic acid was 95%.

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Abstract

The invention relates to a method for preparing formic acid by using a ceria-based catalyst to photothermally catalyze the C-C bond oxidative cleavage of biomass polyols. The method uses glycerin, xylose, glucose, fructose, sucrose, cellobiose or starch as a reaction substrate, oxygen as an oxidant, and cerium oxide or supported cerium oxide as a catalyst. irradiation to achieve its selective oxidation to formic acid. The reaction process is as follows: dissolve the substrate in a solvent, add a catalyst, seal the reactor, replace it with oxygen three times, and maintain a certain pressure, and react with 400-650nm visible light at a temperature of 40-150°C to generate formic acid . This synthetic method may play an important role in the highly selective oxidation of biomass polyols to formic acid.

Description

technical field [0001] The invention relates to a method for preparing formic acid, in particular to a method for photothermally catalyzing the oxidation of biomass polyol glycerin, xylose, glucose, fructose, sucrose, cellobiose or starch to formic acid by using cerium oxide or loaded cerium oxide Methods. Background technique [0002] The depletion of fossil energy and the environmental pollution and greenhouse effect caused by its use make it urgent to develop renewable resources. The conversion and utilization of biomass, which is abundant in nature and the only renewable carbon resource, plays an important role in solving the energy crisis. Effect (Chem. Rev. 2018, 118(2), 505-613). Biomass includes lignocellulose, sugar, bio-oil, etc., and is an oxygen-rich polymer composed of C-skeleton. The selective oxidative cleavage of C-C bonds in biomass can not only convert it into high value-added small molecular compounds, but also introduce new functional groups such as car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/23C07C51/31C07C53/02B01J23/83B01J23/66B01J23/10B01J23/22B01J23/34
CPCC07C51/23C07C51/313B01J23/002B01J23/83B01J23/66B01J23/10B01J23/22B01J23/34B01J35/004C07C53/02Y02P20/133
Inventor 王峰任濮宁罗能超高著衍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI