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Reaction tower with reaction shallow pools and method for preparing ethylene carbonate by using reaction tower

A reaction tower and reaction technology, applied in the field of new reaction towers, can solve the problems of low yield of ethylene carbonate, incomplete conversion of urea, large amount of ethylene glycol polymerization, etc., so as to reduce back mixing, reduce polymerization amount, and reduce heat effect of load

Active Publication Date: 2021-12-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unfavorable thermodynamics of urea and ethylene glycol in the preparation of ethylene carbonate and the thermal sensitivity of the easy polymerization of raw material ethylene glycol and the easy decomposition of product ethylene carbonate, it is necessary to use tank reactors or catalysts for rectification. When the reaction process of preparing ethylene carbonate from urea and ethylene glycol in the reactor is amplified, incomplete conversion of urea, low yield of ethylene carbonate, and large amount of ethylene glycol polymerization will occur. Reaction Technology Problems to be Solved Urgently in Vinyl Ester

Method used

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  • Reaction tower with reaction shallow pools and method for preparing ethylene carbonate by using reaction tower
  • Reaction tower with reaction shallow pools and method for preparing ethylene carbonate by using reaction tower
  • Reaction tower with reaction shallow pools and method for preparing ethylene carbonate by using reaction tower

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a reaction tower with a shallow reaction pool includes a tower body 1 and an agitator 2. The tower body 1 is divided into an upper reaction zone and a tower reactor reaction zone, and the upper reaction zone is from top to bottom A primary reaction shallow pool is provided, and a liquid collection ring 4 is arranged above the reaction shallow pool to collect condensate; the agitator 2 is used to stir the reaction liquid in the tower body 1; the reaction zone of the tower reactor is provided with two No. 22 heating coils.

[0036] The shallow reaction tank includes a cylinder body 6 and a No. 1 heating coil 7, the No. 1 heating coil 7 is arranged in the cylinder body 6, and the cylinder body 6 is fixedly connected with the tower body 1 through a fixing frame 8; The side wall of the cylinder body 6 is provided with the upper interface 9 of the liquid level gauge of the reaction shallow pool passing through the side wall of the tower body 1 and ...

Embodiment 2

[0046] The reaction tower of this embodiment is the same as that of Embodiment 1, and the difference from Embodiment 1 is that 25 reaction shallow pools are arranged from top to bottom in the tower body 1, and liquid collection rings 4 are arranged above the reaction shallow pools. The diameter of the body 1 is 10000 mm; the feed port 14 is 300 mm away from the central axis of the reaction tower; the drain pipe 12 is 300 mm away from the central axis of the reaction tower.

[0047] The diameter of the inner edge 401 of the liquid collecting ring 4 is 3000 mm, the angle α between the liquid collecting ring 4 and the tower body 1 is 90.5°, and the liquid collecting ring 4 above the shallow reaction tank of the first stage is located 1000 mm below the head of the tower top.

[0048] The liquid distribution plate 203 is a disc with five baffles evenly distributed radially from the center of the disc to the edge of the disc. The diameter of the disc is 1000 mm, and the vertical dis...

Embodiment 3

[0059] The reaction tower of this embodiment is the same as that of Embodiment 2. The difference from Embodiment 2 is that there are 12 reaction shallow pools from top to bottom in the tower body 1, and a liquid collection ring 4 is arranged above the reaction shallow pools. The diameter of the body 1 is 5000 mm; the feed port 14 is 200 mm away from the central axis of the reaction tower; the drain pipe 12 is 220 mm away from the central axis of the reaction tower.

[0060] The diameter of the inner edge 401 of the liquid collecting ring 4 is 1500 mm, the angle α between the liquid collecting ring 4 and the tower body 1 is 93°, and the liquid collecting ring 4 above the shallow reaction pool of the first stage is located 600 mm below the head of the tower top.

[0061] The liquid distribution plate 203 is a disc with four baffles evenly distributed radially from the center of the disc to the edge of the disc. The diameter of the disc is 600 mm, and the vertical distance from t...

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Abstract

The invention provides a reaction tower with reaction shallow pools and a method for preparing ethylene carbonate by using the reaction tower. The reaction tower comprises a tower body and a stirrer, the interior of the tower body is divided into an upper reaction area and a tower kettle reaction area, a plurality of stages of reaction shallow pools are arranged in the upper reaction area from top to bottom and are used for realizing graded reaction, and a liquid collecting ring is arranged above each stage of reaction shallow pool and is used for collecting condensate; and the stirrer is used for stirring the reaction liquid in the tower body. The reaction tower for preparing ethylene carbonate has the advantages of being feasible, energy-saving, efficient, high in urea conversion rate, small in ethylene glycol polymerization amount, small in ethylene carbonate decomposition amount, high in yield and the like.

Description

technical field [0001] The invention relates to a novel reaction tower for continuously preparing ethylene carbonate from urea and ethylene glycol and its application method, in particular to a reaction tower with a shallow reaction pool and a method for preparing ethylene carbonate using it. Background technique [0002] Ethylene carbonate is an important organic synthesis intermediate, an important raw material for the preparation of dimethyl carbonate, furazolidone, lubricating oil, grease, and can replace ethylene oxide for dioxylation reaction; it is also a performance An excellent organic solvent, it can be used as a solvent for various polymers, a solvent for acidic gases, spinning liquid on textiles, and water glass-based slurry; it is also an additive with excellent performance, which can be used as a plastic foaming agent, Concrete additive, synthetic lubricating oil stabilizer, fiber finishing agent; it is also one of the indispensable components of high-efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01J19/00B01J4/00C07D317/38
CPCB01J19/1862B01J19/0053B01J19/0006B01J19/0013B01J4/001B01J4/008C07D317/38B01J2204/007B01J2219/00094Y02E60/10
Inventor 肖福魁滕文彬杨金海张生安曹德龙赵宁
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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