Method for preparing glycolate by catalyzing oxalate under action of hydrogenation

A technology of glycolic acid ester and hydrogenation catalysis, which is applied in the preparation of organic compounds, carboxylic acid ester preparation, chemical instruments and methods, etc., can solve the problems of affecting economy and low yield of methyl glycolate, and improve the conversion efficiency, high selectivity, and mild reaction conditions

Active Publication Date: 2011-04-06
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the technical route reported by the current patent, the yield of methyl glycolate is still relatively low, thus affecting the economics of the route, and it is necessary to develop a catalyst with higher activity and selectivity to solve this problem

Method used

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  • Method for preparing glycolate by catalyzing oxalate under action of hydrogenation
  • Method for preparing glycolate by catalyzing oxalate under action of hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0018] 100 grams of catalyst (catalyst non-oxygen element composition expressed in mass percent) was loaded into a fixed-bed tubular reactor, reduced with hydrogen at 300 ° C for 4 hours, after the reduction, the temperature was lowered to the reaction temperature, and dimethyl oxalate and hydrogen were mixed After preheating, enter the reactor for reaction, the reaction pressure is 2.5MPa, the molar ratio of dimethyl oxalate / hydrogen is 1:50, the reaction product is analyzed by gas chromatography, and the specific reaction conditions and results are shown in Table 1.

[0019] Table 1

[0020]

Embodiment 13～15

[0022] 100 grams of catalyst (catalyst non-oxygen composition expressed in mass percent) was loaded into a fixed-bed tubular reactor, and reduced with hydrogen at 300°C for 4 hours. After the reduction, the temperature was lowered to the reaction temperature, and diethyl oxalate and hydrogen were mixed Enter reactor reaction after preheating, reaction pressure 2.5MPa, the mol ratio of diethyl oxalate / hydrogen 1: 50, reaction product uses gas chromatography analysis, other reaction conditions and reaction result among the embodiment 13~15 are shown in Table 2.

[0023] Table 2

[0024]

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Abstract

The invention relates to a method for preparing glycolate by catalyzing oxalate under the action of hydrogenation. The oxalate is used as the raw material, has hydrogenation under the action of catalyst at 120 to 300 DEG C under 0.2 to 10.0 MPa, and continuously reacts in a fixed bed tube type reactor so as to acquire the target product glycolate. The conversion ratio of the oxalate is more than or equal to 90% and the selectivity of the glycolate is more than or equal to 90%. Compared with the prior art, the method of the invention has high catalyst activity and selectivity and mild reaction condition, so the conversion ratio of the raw materials and the selectivity of the target product are both greatly increased.

Description

technical field [0001] The invention relates to a preparation method for catalyzing the hydrogenation of oxalate to synthesize glycolate, in particular to a preparation method for catalyzing the hydrogenation of dimethyl (b) oxalate to synthesize methyl (b) glycolate. Background technique [0002] With the increasing shortage of petroleum resources, it is more and more important to develop C1 chemical industry with natural gas or coal as raw material. The production of oxalate esters through syngas, such as dimethyl oxalate DMO, and then the hydrogenation of dimethyl oxalate to methyl glycolate is an important route of C1 chemical industry. [0003] Methyl (ethyl) glycolate 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) Used as an excellent solvent for fibers, resins and rubber; 2) Further hydrogenation and reduction to ethylene glycol; 3) C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/675C07C67/31B01J23/50B01J23/68B01J23/89
Inventor 宁春利廖湘洲卢磊张春雷
Owner SHANGHAI HUAYI GRP CO
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