Method for producing oxalate through catalytic coupling reaction of carbon monoxide

A technology of gas catalysis and coupling reaction, applied in the direction of carbon monoxide or formate reaction preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the difficulty of temperature control, oxalate selection Low performance and other problems, to achieve the effect of good technical effect

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is the technical problem that temperature control is difficult and the selectivity of oxalate is low in the process of preparing oxalate ester by catalytic coupling of carbon monoxide gas in the previous document technology. Method for producing oxalate by coupling reaction

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  • Method for producing oxalate through catalytic coupling reaction of carbon monoxide
  • Method for producing oxalate through catalytic coupling reaction of carbon monoxide

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Embodiment 1

[0021] use figure 1 The reactor shown in the figure is a composite reactor with a sleeve structure of the inner tube and the outer tube and a hot spot distribution area to enhance heat transfer. The first, second and third heat exchange mediums all use saturated steam, but the pressure is different. , realize the temperature difference, so as to realize the control of the catalyst bed temperature of the reactor, the length of the first partition partition of the reactor from the reactor cover plate is 1 / 5 of the reactor length; The length under the partition is 1 / 6 of the reactor length. The height of the lower adiabatic catalyst layer of the reactor is 1 / 6 of the height of the isothermal catalyst bed; the height of the upper adiabatic catalyst layer is 1 / 10 of the height of the isothermal catalyst bed, and the palladium content is 0.5% palladium supported alumina catalyst as the catalyst , the molar ratio of CO and methyl nitrite is a mixed gas of 1.2:1 as a raw material, th...

Embodiment 2

[0023] use figure 1 The reactor shown in the figure is a composite reactor with a sleeve structure of the inner tube and the outer tube and a hot spot distribution area to enhance heat transfer. The first, second and third heat exchange mediums all use saturated steam, but the pressure is different. , to realize the temperature difference, so as to realize the control of the catalyst bed temperature of the reactor, the distance between the first partition partition of the reactor and the reactor cover is 1 / 8 of the length of the reactor; the distance between the second partition partition and the first partition The length under the partition is 1 / 5 of the reactor length. The height of the lower adiabatic catalyst layer of the reactor is 1 / 15 of the height of the isothermal catalyst bed; the height of the upper adiabatic catalyst layer is 1 / 15 of the height of the isothermal catalyst bed, and the palladium content is 0.2% palladium-loaded alumina catalyst as the catalyst , us...

Embodiment 3

[0025] use figure 1 The reactor shown in the figure is a composite reactor with a sleeve structure of the inner tube and the outer tube and a hot spot distribution area to enhance heat transfer. The first, second and third heat exchange mediums all use saturated steam, but the pressure is different. , to realize the difference in temperature, so as to realize the control of the catalyst bed temperature in the reactor. The length under the partition is 1 / 3 of the reactor length. The height of the lower adiabatic catalyst layer of the reactor is 1 / 8 of the height of the isothermal catalyst bed; the height of the upper adiabatic catalyst layer is 1 / 6 of the height of the isothermal catalyst bed, and the palladium content is 0.2% palladium-loaded alumina catalyst as the catalyst , the molar ratio of CO and methyl nitrite is a mixed gas of 1.3:1 as a raw material, the reaction temperature is 150 ° C, and the reaction volume space velocity is 5000 hours -1 , under the condition of...

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Abstract

The invention relates to a method for producing oxalate through catalytic coupling reaction of carbon monoxide, and mainly solves the technical problems in the prior art that in the reaction process of producing oxalate through catalytic coupling of carbon monoxide, the temperature control is difficult and oxalate is low in selectivity. The method adopts a mixed gas of both nitrous acid ester and carbon monoxide as the raw material and comprises the step that under the conditions that the reaction temperature is 100-180 DEG C, the hourly space velocity is 500-10,000 hours<-1>, the reaction pressure is -0.08-1.5MPa and the carbon monoxide / nitrous acid ester molar ratio is 1-5:1, the raw material is in contact with a precious metal catalyst in a compound reactor adopting an inner-tube and outer-tube sleeve structure and a hotspot distribution area for heat transfer enhancement, so as to react to produce an effluent containing oxalate. By adopting the technical scheme, the problems are better solved, and the method provided by the invention can be used for industrial production of oxalate through catalytic coupling of carbon monoxide.

Description

technical field [0001] The present invention relates to a method for producing oxalate by catalytic coupling reaction of carbon monoxide gas, in particular to reacting catalysts and exchanging heat in a composite reactor using inner tube and outer tube casing structure and hot spot distribution area to enhance heat transfer The method realizes the reaction of carbon monoxide gas-phase coupling catalytic reaction to produce oxalate, and is practical in the reaction process of carbon monoxide gas catalytic coupling to produce oxalate. Background technique [0002] Oxalate is an important organic chemical raw material, which is widely used in the fine chemical industry to produce various dyes, medicines, important solvents, extractants and various intermediates. In the 21st century, oxalate, as a degradable and environmentally friendly engineering plastic monomer, has received extensive international attention. In addition, oxalic acid can be obtained by normal pressure hydrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/36C07C67/36B01J23/42B01J23/44B01J8/06
Inventor 刘俊涛孙凤侠蒯骏
Owner CHINA PETROLEUM & CHEM CORP
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