Method for mixing oxalate and hydrogen

A technology of oxalate and hydrogen, which is applied in mixing methods, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of poor mixing effect of oxalate and hydrogen, and high decomposition rate of oxalate, and achieve engineering scale-up. Problems, shorter dwell time, effect of saving investment

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the mixing effect of oxalic acid ester and hydrogen in the previous literature is poor, and the technical problem of oxalic acid ester decomposition rate is high, and a new method for mixing oxalic acid ester and hydrogen is provided

Method used

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  • Method for mixing oxalate and hydrogen
  • Method for mixing oxalate and hydrogen
  • Method for mixing oxalate and hydrogen

Examples

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Effect test

Embodiment 1

[0027] The mixing of dimethyl oxalate and hydrogen is carried out in the rotating packed bed supergravity field device, and it is used in the reaction of hydrogenation of dimethyl oxalate to ethylene glycol. Attached figure 1 The rotating packed bed supergravity field device shown.

[0028]Hydrogen enters the rotating packed bed hypergravity field mixing device through the gas inlet 1, and diffuses into the rotating packing 2 under the action of pressure difference, and the rotating packing speed is adjusted to 2000rpm. The dimethyl oxalate solution is introduced into the inside of the liquid distributor 6 and the rotary packing 2 through the liquid inlet pipeline 8 through the liquid inlet 4, the molar ratio of hydrogen to dimethyl oxalate is 100:1, the mixing temperature is 190°C, and the pressure is 3.0MPa, the residence time is 0.1 second, the gas and the liquid are in countercurrent contact in the filler, the mixed effluent is gas, which is discharged through the gas out...

Embodiment 2

[0030] The mixing of diethyl oxalate and hydrogen is carried out in the rotating packed bed supergravity field device, and it is used in the reaction of hydrogenation of diethyl oxalate to ethylene glycol. Attached figure 2 The rotating packed bed supergravity field device shown.

[0031] Hydrogen enters the rotating packed bed hypergravity field mixing device through the gas inlet 3, and diffuses into the rotating packing 2 under the action of pressure difference, and the rotating packing speed is adjusted to 5000rpm. The diethyl oxalate solution is introduced into the inside of the liquid distributor 6 and the rotary packing 2 through the liquid inlet pipeline 8 through the liquid inlet 4, the molar ratio of hydrogen to diethyl oxalate is 80:1, the mixing temperature is 195°C, and the pressure is 2.5MPa, the residence time is 0.08 seconds, the gas and the liquid are co-currently contacted in the filler, the mixed effluent is gas, and the gas effluent is discharged through ...

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Abstract

The invention relates to a method for mixing oxalate and hydrogen, which mainly solves the technical problems of poor mixture effect of oxalate and hydrogen and high resolution ratio of oxalate in the prior art. Oxalate and hydrogen materials are induced into a supergravity device of a rotary packed bed and mixed under the conditions of a stay time of 0.001-2 seconds, a pressure of 0.5-8.0MPa anda temperature of 60-250 DEG C; and then the mixed materials leave the supergravity device of the rotary packed bed, wherein the supergravity device of the rotary packed bed comprises a gas inlet (1),rotary packing (2), a gas outlet (3), a liquid inlet (4), a motor shaft (5) and a liquid distributor (6). The technical scheme betters solves the problems, and the method for mixing oxalate and hydrogen can be used for industrial production for mixing oxalate and hydrogen.

Description

technical field [0001] The invention relates to a method for mixing oxalate and hydrogen, in particular to a method for mixing raw materials for oxalate hydrogenation to prepare ethylene glycol. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material, mainly used in the production of polyester fiber, antifreeze, unsaturated polyester resin, lubricant, plasticizer, nonionic surfactant and explosives, etc. It can be used in industries such as paint, photographic developer, brake fluid and ink, as a solvent and medium for ammonium perborate, and for the production of special solvents such as glycol ether, etc., and has a wide range of uses. [0003] At present, large-scale ethylene glycol production at home and abroad adopts the process route of direct hydration or pressurized hydration. This process is to prepare a mixed aqueous solution of ethylene oxide and water at a ratio of 1:20 to 22 (molar ratio) in a fixed bed. React in the rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/04C07C31/20C07C29/149
Inventor 刘俊涛王万民孙凤侠
Owner CHINA PETROLEUM & CHEM CORP
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