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High-activity catalyst for dimethyl oxalate hydrogenation and preparation method of the high-activity catalyst

A highly active catalyst, the technology of dimethyl oxalate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of hydroxyl compounds, can solve the problems of improving catalytic performance and poor product selectivity, and achieve excellent catalytic activity. The effect of moderate content and uniform dispersion

Pending Publication Date: 2020-05-22
SHIHEZI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on gas-phase hydrogenation of dimethyl oxalate mainly focuses on copper-based catalysts and silver-based catalysts. Most of the improvement research on copper-based catalysts and silver-based catalysts is focused on adding additives. This method can improve catalytic performance. And the selectivity of the product is relatively inferior

Method used

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  • High-activity catalyst for dimethyl oxalate hydrogenation and preparation method of the high-activity catalyst
  • High-activity catalyst for dimethyl oxalate hydrogenation and preparation method of the high-activity catalyst
  • High-activity catalyst for dimethyl oxalate hydrogenation and preparation method of the high-activity catalyst

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: (catalyst 20%Cu / 1CS-1SiO 2 )

[0025] 1) Preparation of carbon microspheres CS

[0026] Prepare 10.27g of sucrose with M=342.3g / mol into a 0.3mol / L solution with deionized water, take 70mL of sucrose aqueous solution and pour it into a reactor with a polytetrafluoroethylene liner, and place the reactor at 180°C In the oven, react for 14 hours, then take the reaction kettle out of the oven and cool it down to room temperature naturally to obtain a brown or black jelly, which is centrifuged and washed three times with deionized water, absolute ethanol, and acetone , and then dried in a drying oven at 80°C for 12 hours to obtain spare carbon microspheres CS;

[0027] 2) Preparation of copper-based catalysts on carbon microspheres-silica composite supports by ammonia distillation

[0028] The carbon microsphere CS prepared in step 1) was dispersed in 0.1M copper nitrate solution, the amount of carbon microsphere CS added was 0.4g, the addition amount of 0.1...

Embodiment 2

[0031] Embodiment 2: (catalyst 20%Cu / 6CS-1SiO 2 )

[0032] 1) Preparation of carbon microspheres CS

[0033] Prepare 10.27g of sucrose with M=342.3g / mol into a 0.3mol / L solution with deionized water, take 100mL of sucrose aqueous solution and pour it into a reaction kettle with a polytetrafluoroethylene liner, and place the reaction kettle at 178°C In the oven, react for 16 hours, then take the reaction kettle out of the oven and cool it down to room temperature naturally to obtain a brown or black jelly, which is centrifuged and washed three times with deionized water, absolute ethanol, and acetone , and then dried in a drying oven at 80°C for 13 hours to obtain spare carbon microspheres CS;

[0034] 2) Preparation of copper-based catalysts on carbon microspheres-silica composite supports by ammonia distillation

[0035] The carbon microspheres CS prepared in step 1) were dispersed in 0.1M copper nitrate solution, the amount of carbon microspheres CS added was 0.69g, the a...

Embodiment 3

[0038] Embodiment 3: (catalyst 20%Cu / 3CS-1SiO 2 )

[0039] 1) Preparation of carbon microspheres CS

[0040] Prepare 10.27g of sucrose with M=342.3g / mol into a 0.3mol / L solution with deionized water, take 80mL of sucrose aqueous solution and pour it into a reactor with a polytetrafluoroethylene liner, and place the reactor at 182°C In the oven, react for 15 hours, then take the reactor out of the oven and cool it down to room temperature naturally to obtain a brown or black jelly, which is centrifuged and washed three times with deionized water, absolute ethanol, and acetone , and then dried in a drying oven at 80°C for 12 hours to obtain spare carbon microspheres CS;

[0041] 2) Preparation of copper-based catalysts on carbon microspheres-silica composite supports by ammonia distillation

[0042] The carbon microspheres CS prepared in step 1) were dispersed in 0.1M copper nitrate solution, the amount of carbon microspheres CS added was 0.6g, the addition amount of 0.1M cop...

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Abstract

The invention relates to the field of chemical catalysts, and particularly relates to a high-activity catalyst for dimethyl oxalate hydrogenation and a preparation method of the high-activity catalyst. The catalyst is a copper-based catalyst adopting a carbon microsphere-silicon dioxide composite carrier, the structural formula of the catalyst is MCu / xCS-ySiO2, M is the theoretical loading capacity of Cu, and x and y are the mass ratio of CS to SiO2. When the M is equal to 20% and the x / y mass ratio is equal to 1, and the 20% Cu / 1CS-1SiO2 catalyst is used for a dimethyl oxalate hydrogenation reaction, ethylene glycol EG is generated at a low DMO airspeed, methyl glycolate MG is generated at a high DMO airspeed, and dual functionalization of the catalyst is realized.

Description

technical field [0001] The invention relates to the field of chemical catalysts, in particular to a highly active catalyst used in the hydrogenation reaction of dimethyl oxalate and a preparation method thereof. Background technique [0002] The hydrogenation of dimethyl oxalate to ethylene glycol is an important application in coal chemical production. In addition, partial hydrogenation of dimethyl oxalate can give methyl glycolate. Methyl glycolate is a very important chemical intermediate, which is widely used in the fields of chemical industry, pesticide, fragrance, medicine and dyestuff. At present, the research on gas-phase hydrogenation of dimethyl oxalate mainly focuses on copper-based catalysts and silver-based catalysts. Most of the improvement research on copper-based catalysts and silver-based catalysts is focused on adding additives. This method can improve catalytic performance. And the selectivity of the product is relatively inferior. Contents of the inve...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J35/08C07C29/149C07C67/31C07C31/20C07C69/675
CPCB01J23/72C07C29/149C07C67/31B01J35/51C07C31/202C07C69/675Y02P20/52
Inventor 王登豪张传彩代斌朱明远李江兵袁莹莹薛浩东郭海龙
Owner SHIHEZI UNIVERSITY
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