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A method for preparing tartronic acid by catalytic oxidation of glycerol

A technology for catalytic oxidation and propanedioic acid, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylates, etc., can solve problems such as low activity of single-metal catalysts, easy growth of precious metal particles, and decreased activity , to reduce the reaction cost, improve the reaction efficiency, and avoid high cost.

Active Publication Date: 2016-09-14
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

So far, studies have found that only multi-metal supported catalysts such as Au, Pt, and Pd have good catalytic effects, and single-metal catalysts are not active.
Due to the weak force between the noble metal and the carbon support, the noble metal particles are easy to grow and the activity decreases as the oxidation reaction proceeds or is used repeatedly.

Method used

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  • A method for preparing tartronic acid by catalytic oxidation of glycerol
  • A method for preparing tartronic acid by catalytic oxidation of glycerol
  • A method for preparing tartronic acid by catalytic oxidation of glycerol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The reaction vessel is an autoclave with 10ml polytetrafluoroethylene lining inside. Take 0.23g of Glycerol (glycerol), 1.5g of NaOH, and 6.92ml of water into the reaction vessel, 0.31g of AuBi / CeO 2 (Au0.5wt%, Bi1.5wt%) is a catalyst. After the temperature is programmed to 30°C, 1.5MPa oxygen is added and reacted for 7 hours. Oxygen is continuously added during the reaction to ensure that the reaction proceeds under constant temperature and pressure. After the reaction product was centrifuged, the supernatant was removed and analyzed by HPLC. The reaction results are shown in Table 1.

Embodiment 2

[0025] The reaction vessel is an autoclave with 10ml polytetrafluoroethylene lined inside, 0.23g Glycerol, 1.5g NaOH, 6.92ml water are added into the reaction vessel, 0.33g AuPdBi / Al 2 O 3 (Au1wt%, Pd1wt%, Bi1.5wt%) are catalysts. After the temperature is programmed to 30°C, 1.5MPa oxygen is added and reacted for 7 hours. Oxygen is continuously supplied during the reaction to ensure that the reaction proceeds under constant temperature and pressure. After the reaction product was centrifuged, the supernatant was removed and analyzed by HPLC. The reaction results are shown in Table 1.

[0026] Implement your 3:

[0027] The reaction vessel is an autoclave with 10ml polytetrafluoroethylene lining, 0.46g of Glycerol, 1.6g of NaOH, and 14.4ml of water are added to the reactor, 0.31g of AuCe / hydrotalcite (Au2wt%, Ce1wt%) is used as the catalyst, After the temperature was programmed to 80°C, 0.3 MPa oxygen was added, and the reaction was continued for 9 hours. During the reaction, oxygen...

Embodiment 4

[0029] The reaction vessel is an autoclave with 10ml polytetrafluoroethylene lining. 0.46g Glycerol, 0.8g NaOH and 16ml water are added into the reaction vessel, 0.35g Au / HY (Au 2wt%) is the catalyst, and the temperature is programmed to After 60°C, 0.3 MPa oxygen was added and reacted for 7 hours. During the reaction, oxygen was continuously added to ensure that the reaction proceeded under constant temperature and pressure. After the reaction product was centrifuged, the supernatant was removed and analyzed by HPLC. The reaction results are shown in Table 1.

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Abstract

The invention provides a method of preparing propanoldiacid through catalytic oxidation of glycerol. The method uses a noble metal supported catalyst for high-efficient catalytic oxidation of the glycerol to directly generate the propanoldiacid under a mild condition, with a temperature being 20-80 DEG C and a pressure being 0.3-3.0 MPa. A conversion rate of the glycerol reaches more than 99 %, and a catalyst selectivity reaches 95 %. The method is high-efficient and environmental-protective, and has a relatively large application prospect.

Description

Technical field [0001] The invention relates to the field of chemistry and chemical engineering, in particular to a method for preparing glycerol diacid by catalytic oxidation of glycerol and its application. Background technique [0002] The energy crisis and the aggravation of environmental problems have prompted people to find an urgent need for renewable alternative fuels. Biodiesel is a clean, high cetane number, high combustion heat, and environmentally friendly alternative fuel that does not contain sulfur and aromatics. Its production technology has been extensively promoted and developed in recent years (WO2008151149-A2, US2007048848-A1, CN200710098486.7). With the gradual heating up of the biodiesel industry, the development and utilization of its 10% co-product-biomass-based glycerol (one ton of crude glycerin is produced for every ten tons of biodiesel) has caused widespread worldwide Because if these co-products cannot be used and processed in time, they may waste r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C59/245C07C51/285C07C51/235B01J23/68B01J23/66B01J29/12B01J29/44B01J29/48B01J29/14B01J29/74B01J23/89B01J29/46
Inventor 徐杰蔡嘉莹马红杜中田王峰高进宋奇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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