NO2 pre-reaction device system used in industrial production of ethylene glycol

A ethylene glycol, pre-reaction technology, applied in nitrogen dioxide, chemical/physical/physical-chemical processes, chemical instruments and methods, etc., can solve problems such as pre-reactor explosion, safety hazards, etc., to speed up the reaction speed, avoid The effect of fluid accumulation and elimination of safety hazards

Active Publication Date: 2013-07-03
PUJING CHEM IND SHA
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  • Abstract
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Problems solved by technology

The device will generate a lot of heat due to the side reaction of effusion, which will cause the explosion of the pre-reactor, which has potential safety hazards

Method used

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  • NO2 pre-reaction device system used in industrial production of ethylene glycol
  • NO2 pre-reaction device system used in industrial production of ethylene glycol

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Embodiment Construction

[0033] Such as figure 2 Shown, NO in the industrial production of ethylene glycol of the present invention 2 The pre-reaction device system, including the NO compressor 1 connected with the NO 2 Prereactor 2, the NO 2 The outlet of the prereactor is connected to the esterification tower 3, the NO 2 The pre-reactor is a vertical reactor, and a cooling and cooling device is provided inside it, and the cooling and cooling device includes several vertical tubes 7 arranged in parallel, and the upper ends of the several vertical tubes are connected to form a The condensed water inlet pipe 5 and the lower end are connected to form a condensed water outlet pipe 6, and both the inlet pipe and the outlet pipe extend to the NO 2 outside of the prereactor. The NO gas generated by the carbonylation reaction passes through the NO compressor 1 to circulate the mixed gas containing NO to the ester chemical plant, and enters the improved shell and tube NO gas 2 The pre-reactor 2 is mixed...

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Abstract

The invention discloses an NO2 pre-reaction device system used in industrial production of ethylene glycol, which comprises an NO2 prereactor connected with an NO compressor through a pipeline, wherein an outlet of the NO2 prereactor is connected to an esterification column, the NO2 prereactor is a vertical reactor, and a cooling device is arranged inside or outside the NO2 prereactor. The original NO2 prereactor (empty barrel type reactor) is modified into a tubular NO2 prereactor, so that the NO2 pre-reaction device system has the advantages that the oxidation reaction is exothermic reaction, the adopted tubes are favorable for heat exchange, the reaction speed is accelerated by circulating water condensation, the liquid accumulation also can be avoided, the potential safety hazard is eliminated, and the reaction can be fully carried out.

Description

technical field [0001] The present invention relates to NO in the industrial production of ethylene glycol 2 Pre-reaction device system. Background technique [0002] The main production methods of ethylene glycol include direct hydration of ethylene oxide, direct hydration of ethylene, and hydrolysis of dichloroethane. Although there are many production processes of ethylene glycol, the price of petroleum is still high, and the production cost of ethylene glycol is getting higher and higher. Coal-to-ethylene glycol technology has become an effective way to solve this problem. [0003] Coal-to-ethylene glycol technologies include oxalate hydrogenation synthesis route, synthesis gas direct synthesis route, formaldehyde synthesis route, etc. Among them, the oxalate ester hydrogenation synthesis route uses coal as raw material to synthesize ethylene glycol, that is, coal is produced through gas production. Take CO, H 2 . CO reacts with methyl nitrite under the action of a c...

Claims

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Application Information

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IPC IPC(8): B01J19/00C01B21/36
Inventor 李久玉陈林倪源满范旭李忠陈明功
Owner PUJING CHEM IND SHA
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