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Catalyst and method for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation

A technology of methyl glycolate and dimethyl oxalate, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of poor stability, low catalyst activity, etc. problems, to achieve mild reaction conditions, high activity, and good selectivity.

Inactive Publication Date: 2015-04-08
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problem of low catalyst activity and poor stability in the prior art, and a new catalyst for the hydrogenation of dimethyl oxalate to synthesize methyl glycolate and ethylene glycol is provided

Method used

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  • Catalyst and method for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 23.6g of silver nitrate in 100mL of water, immerse 100g of titanium dioxide in the prepared solution, soak for 2 hours, separate the solid after fully absorbed, dry at 80°C for 4 hours, and then roast at 400°C for 5 The catalyst was produced after hours. After sieving the catalyst, take 20-30 mesh particles, fill them in a fixed-bed reactor, pass through hydrogen for reduction at 300°C for 4 hours, and then react at a reaction temperature of 250°C, a pressure of 2.5Mpa, and a hydrogen ester molar ratio of 50 , Feed liquid hourly space velocity 0.7h -1 Hydrogenation reaction was carried out under certain conditions, and the reaction results obtained: the conversion rate of dimethyl oxalate was 98.3%, the selectivity of methyl glycolate was 94.1%, the selectivity of ethylene glycol was 5.1%, and the yield of methyl glycolate was 92.5%. , and no carrier components were detected in the product.

Embodiment 2

[0033]Dissolve 23.6g of silver nitrate in 90mL of water, immerse 100g of titanium dioxide into the prepared solution, soak for 2 hours, and after complete absorption, dry the solid at 80°C for 4 hours, and then bake it at 300°C for 4 hours The catalyst is prepared. After sieving the catalyst, take 20-30 mesh particles, fill them in a fixed-bed reactor, pass through hydrogen for reduction at 300°C for 4 hours, and then react at a reaction temperature of 240°C, a pressure of 2.5Mpa, and a hydrogen ester molar ratio of 50 , Feed liquid hourly space velocity 0.7h -1 Hydrogenation reaction was carried out under certain conditions, and the reaction results obtained: the conversion rate of dimethyl oxalate was 98.2%, the selectivity of methyl glycolate was 93.1%, the selectivity of ethylene glycol was 6.1%, and the yield of methyl glycolate was 91.4%. , and no carrier components were detected in the product.

Embodiment 3

[0035] Dissolve 23.6g of silver nitrate in 100mL of water, immerse 100g of carbon nanotubes in the prepared solution, soak for 2 hours, separate the solid after full absorption, dry at 80°C for 4 hours, and then roast at 400°C for 5 hours The catalyst is then prepared. After sieving the catalyst, take 20-30 mesh particles, fill them in a fixed-bed reactor, pass through hydrogen for reduction at 300°C for 4 hours, and then react at a reaction temperature of 250°C, a pressure of 2.5Mpa, and a hydrogen ester molar ratio of 50 , Feed liquid hourly space velocity 0.7h -1 Hydrogenation reaction was carried out under certain conditions, and the reaction results obtained: the conversion rate of dimethyl oxalate was 99.3%, the selectivity of methyl glycolate was 97.1%, the selectivity of ethylene glycol was 2.1%, and the yield of methyl glycolate was 96.4%. , and no carrier components were detected in the product.

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Abstract

The invention relates to a catalyst and a method for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation, and mainly aims to solve the problems that the catalyst in the prior art is low in activity and poor in stability. The invention adopts a technical scheme that the catalyst for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation comprises the following components in percentage by mass: 0.01-30% of an active component Ag, 0-10% of an auxiliary agent and the balance of a carrier, wherein the carrier is at least one of titanium dioxide and a carbon carrier, the active component is Ag, and the auxiliary agent is at least one of Cu, Ca, Ba, Mg, Au, Ru, Rh, Pd, Pt, Ni, Zn and Zr; and the method for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation is also adopted. Therefore, the problems are well solved by the technical scheme, and the technical scheme can be used in a process for synthesizing methyl glycollate and ethylene glycol by virtue of dimethyl oxalate hydrogenation.

Description

technical field [0001] The invention relates to a catalyst and a method for hydrogenating dimethyl oxalate to synthesize methyl glycolate and ethylene glycol. Background technique [0002] Methyl glycolate (HOCH 2 COOCH 3 , MG) is a class of important chemical products and intermediates, widely used in many fields such as chemical industry, medicine, pesticide, feed, dyestuff and spices. Mainly include: 1) Excellent solvent for fiber, resin and rubber; 2) Further hydrogenation reduction to ethylene glycol; 3) Carbonylation to produce (mono) methyl malonate; 4) Ammonolysis to produce glycine; 5) Oxidative dehydrogenation to produce methyl glyoxylate; 6) Hydrolysis to produce glycolic acid, etc. Among them, the potential market of glycolic acid is particularly important. At present, the synthesis of glycolic acid in foreign countries mainly adopts the carbonylation route with formaldehyde as the raw material or the reaction route between formaldehyde and hydrocyanic acid. T...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J23/89C07C31/20C07C29/149C07C69/675C07C67/31
CPCY02P20/52
Inventor 卢磊廖湘洲李永刚宁春利张春雷
Owner SHANGHAI HUAYI GRP CO
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