Axial-radial reactor for synthesizing ethylene glycol by alkyl oxalate hydrogenation

Abstract

The invention relates to an axial-radial reactor for synthesizing ethylene glycol by alkyl oxalate hydrogenation. The axial-radial reactor comprises a reactor body, wherein an axial-radial reaction zone is arranged in the reactor body, and an inner porous distribution barrel and an outer porous distribution barrel are arranged in the axial-radial reaction zone from inside to outside sequentially in a sleeving manner; holes I are fully distributed in the wall of the inner porous distribution barrel in the axial direction of the reactor body; holes II are formed in the end, opposite to a reaction gas inlet, of the outer porous distribution barrel in the axial direction of the reactor body; the wall, provided with the holes II, of the outer porous distribution barrel is shorter than the wall,provided with the holes I, of the inner porous distribution barrel, so that axial-radial flow and radial flow of reaction materials in a catalyst between the inner porous distribution barrel and theouter porous distribution barrel are realized. Compared with the prior art, the axial-radial reactor has the advantages that gas distribution is uniform, bed pressure drop is small, bed temperature distribution is reasonable, selectivity of ethylene glycol is high, production capacity of the reactor can be improved remarkably on the premise that diameter of the reactor is not increased, and the like.

Description

technical field [0001] The invention relates to a reactor, in particular to an axial radial reactor for hydrogenating alkyl oxalate to synthesize ethylene glycol. Background technique [0002] Ethylene glycol is an important organic chemical raw material, which can react with terephthalic acid (PTA) to produce polyethylene terephthalate (PET), that is, polyester resin, which can be used as polyester fiber and polyester Plastic raw material, which is currently the most important use of ethylene glycol. Ethylene glycol can also react with polybasic acids such as phthalic acid, maleic acid, and fumaric acid to form corresponding polymers, which are collectively referred to as alkyd resins. Secondly, ethylene glycol can also be directly used as antifreeze and formulated Engine coolant, ethylene glycol dinitrate can be used as explosives, and it is also an indispensable substance for the production of plasticizers, paints, adhesives, surfactants, explosives and capacitor electro...

AI Technical Summary

Problems solved by technology

Patent CN 202876771 U discloses a radial reactor applied to the hydrogenation of alkyl oxalate to synthesize ethylene glycol. The reactor has a high catalyst loading factor, a small pressure drop, and a large production capacity. However, the radial reactor is due to fluid The flow area is large, the catalyst bed is thin, and there is a possibility of uneven distribution of fluid along the axial direction

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