Method for preparing metal oxide loaded high-entropy alloy and synthesizing methyl propionate

A high-entropy alloy, methyl propionate technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, carbon monoxide or formate reaction preparation, chemical instruments and methods, etc., can solve the methyl propionate yield Advanced problems, to achieve the effect of simple reaction process, high yield and high stability

Pending Publication Date: 2022-06-14
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

The preparation process does not require additional additives, and the yield of methyl propionate is high, which solves

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0012] Example 1

[0013] A certain amount of TiO 2 Disperse in water at 80 °C, then add equimolar cobalt nitrate, iron nitrate, nickel nitrate, copper nitrate and ruthenium chloride to keep the total mass loading of the metal at 1 wt%, under high-speed stirring in an inert atmosphere, quickly pour it into CoFeNiCuRu-HEA / TiO was prepared from sodium borohydride solution, the ratio of total moles of sodium borohydride to metal was 10:1, followed by filtration, washing, drying and reduction at 350 °C for 2 h in a hydrogen atmosphere 2 High-entropy alloy catalysts. The high-resolution transmission electron microscope image showed that the size of the nanoparticles was 5.3 nm, and the components were uniformly distributed in the Maping mode, indicating that the high-entropy alloy was successfully prepared. Weigh 0.5g and put it into a 200mL stainless steel reaction kettle containing PTFE lining, add 30mL of methanol, put in a magnet, fill with 0.5MPa ethylene and 0.1MPa CO respe...

Example Embodiment

[0014] Example 2

[0015] A certain amount of ZrO 2 Disperse in 80°C water, then add equimolar cobalt nitrate, ferric nitrate, nickel nitrate, copper nitrate and ruthenium chloride to keep the total mass loading of the metal at 1 wt%, under high-speed stirring in an inert atmosphere, quickly pour CoFeNiCuRu-HEA / ZrO was prepared from sodium borohydride solution, the ratio of total moles of sodium borohydride to metal was 10:1, followed by filtration, washing, drying and reduction at 350 °C for 2 h in a hydrogen atmosphere 2 High-entropy alloy catalysts. High-resolution transmission electron microscopy showed that the size of the nanoparticles was 5.3 nm, and the components were uniformly distributed in the Maping mode, indicating that the high-entropy alloy was successfully prepared. Weigh 0.5 g into a 200 mL stainless steel reaction kettle containing a PTFE lining, add 30 mL of methanol, put in a magnet, fill with 0.5 MPa ethylene and 0.5 MPa CO respectively, tighten the lid...

Example Embodiment

[0016] Example 3

[0017] A certain amount of CeO 2Disperse in water at 80 °C, then add equimolar cobalt nitrate, iron nitrate, nickel nitrate, copper nitrate and ruthenium chloride to keep the total mass loading of the metal at 1 wt%, under high-speed stirring in an inert atmosphere, quickly pour it into CoFeNiCuRu-HEA / CeO was prepared by using sodium borohydride solution with a total mole ratio of sodium borohydride to metal of 10:1, followed by filtration, washing, drying and reduction at 350 °C for 2 h in a hydrogen atmosphere 2 High-entropy alloy catalysts. The high-resolution transmission electron microscope image showed that the size of the nanoparticles was 5.3 nm, and the components were uniformly distributed in the Maping mode, indicating that the high-entropy alloy was successfully prepared. Weigh 0.5 g and put it into a 200 mL stainless steel reaction kettle containing a PTFE lining, add 30 mL of methanol, put in a magnet, fill with 0.5 MPa ethylene and 0.5 MPa C...

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Abstract

The invention relates to a method for preparing methyl propionate by catalyzing ethylene, CO and methanol through a metal oxide loaded high-entropy alloy. According to the method, gaseous ethylene, CO and liquid methanol are adopted as reactants, and methyl propionate is prepared through a carbonylation-esterification process under the action of a metal oxide loaded high-entropy alloy. The specific reaction process is as follows: putting a catalyst into an intermittent tank reactor, adding a certain amount of methanol, then introducing ethylene and CO with certain pressure, and reacting at the temperature of 80-250 DEG C to obtain methyl propionate. According to the method, methyl propionate can be obtained through carbonylation esterification of ethylene, CO and methanol in one step, the stability of the catalyst is excellent, the activity is basically not reduced after ten times of circulation, and the highest yield of methyl propionate can reach 85%.

Description

technical field [0001] The invention relates to a method for preparing methyl propionate, in particular to the methoxycarbonylation of ethylene, CO and methanol to prepare methyl propionate by a metal oxide-supported high-entropy alloy catalyst. Background technique [0002] Methyl propionate has a wide range of applications in the fields of medicine, chemical industry, perfume, etc. One of its important applications is that it can be condensed with formaldehyde Aldol to obtain important polymer monomers, methyl methacrylate, and polymethacrylic acid obtained by polymerization. Methyl ester has the advantages of high transparency, low price, and easy machining, and is an important substitute for glass. At present, the most concerned about the preparation of methyl propionate is the one-step methoxycarbonylation of ethylene, CO and methanol to prepare methyl propionate. Because the sources of raw materials are very extensive, all raw materials can be obtained in large quanti...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/00B01J35/02B01J37/16B01J37/18C07C67/38C07C69/24
CPCB01J23/8926B01J23/894B01J23/898B01J23/8953B01J35/023B01J35/0046B01J37/16B01J37/18C07C67/38C07C69/24
Inventor 王峰雷丽军王业红张志鑫李书双
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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