Multiphase reactor used in ethylene carbonate synthesis

An ethylene carbonate and reactor technology, applied in the field of gas-liquid-solid three-phase reactors, can solve problems such as cavitation, unfavorable reaction process, damage to downstream equipment, etc., to improve reaction performance, increase residence time, and ensure utilization rate effect

Active Publication Date: 2017-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention intends to solve is the following problems existing in the prior art: (1) The uneven distribution of gas and liquid phase feeds leads to short circuit and channeling phenomenon in the reactor, which reduces the utilization efficiency of the catalyst and is unfavorable to the reaction process (2) there is gas phase entrainment in the liquid product, after flowing out of the reactor, it is e

Method used

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  • Multiphase reactor used in ethylene carbonate synthesis
  • Multiphase reactor used in ethylene carbonate synthesis
  • Multiphase reactor used in ethylene carbonate synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] according to figure 1 , figure 2 , the diameter of the gas-liquid-solid three-phase reactor is 500 mm, the catalyst bed is one layer, the branch pipes and the main pipe of the liquid inlet distributor and the gas inlet distributor are circular pipes, which are distributed in a cross intersection, and the liquid inlet distributors are each The branch pipes are installed at intervals of 60°, and the branch pipes of the gas inlet distributor are installed at intervals of 30°. One row of small holes is set on the branch pipe of the liquid inlet distributor, and two rows of small holes are opened on the branch pipe of the gas inlet distributor, and the angle between the opening directions of each row is 90°. The upper opening ratio of the branch pipe of the gas inlet distributor is 30%. The number of liquid phase baffles in the lower part of the reactor is 2, each baffle has the same spacing, and forms an angle of 90° with the shell. The cross-sectional area of ​​the baf...

Embodiment 2

[0022] according to figure 1 , figure 2 , the diameter of the gas-liquid-solid three-phase reactor is 1000mm, the catalyst bed is 2 layers, and the gas inlet distributor is set between the layers. Cross-intersecting distribution, install the branch pipes of the liquid inlet distributor at an angle of 45°, and install the branch pipes of the gas inlet distributor at an angle of 30°. Two rows of small holes are set on the branch pipe of the liquid inlet distributor, and the angle between the opening directions of each row is 90°; 3 rows of small holes are opened on the branch pipe of the gas inlet distributor, and the angle between the opening directions of each row is 45° °. The upper opening ratio of the branch pipe of the gas inlet distributor is 25%. The number of liquid-phase baffles in the lower part of the reactor is 5, and the distance between each baffle is the same, and they form an angle of 90° with the shell. The cross-sectional area of ​​the baffle plate accoun...

Embodiment 3

[0024] according to figure 1 , figure 2 , the diameter of the gas-liquid-solid three-phase reactor is 1500mm, the catalyst bed is 3 layers, and the gas inlet distributor is set between the layers. Cross-intersecting distribution, the liquid inlet distributor is installed at an angle of 60° between each branch pipe, and the gas inlet distributor is installed at an angle of 30° between each branch pipe. Two rows of small holes are set on the branch pipe of the liquid inlet distributor, and the angle between the opening directions of each row is 60°; 3 rows of small holes are opened on the branch pipe of the gas inlet distributor, and the angle between the opening directions of each row is 30° °. The upper opening ratio of the branch pipe of the gas inlet distributor is 40%. The number of liquid-phase baffles in the lower part of the reactor is 6, and the distance between each baffle is the same, and they form an angle of 90° with the shell. The cross-sectional area of ​​the...

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Abstract

The invention relates to a gas-liquid-solid three-phase reactor used for synthesizing ethylene carbonate with ethylene oxide and carbon dioxide. The reactor comprises, from bottom to top, a liquid discharge port, liquid baffles; a gas inlet port, a gas inlet distributor, a catalyst lower supporting sieve plate, a lower ceramic ball layer, a catalyst layer, an upper ceramic ball layer, a catalyst upper supporting sieve plate, a liquid inlet port, a liquid feed distributor, and a gas discharge port. Gas and liquid feeds respectively radially and uniformly enter the catalyst bed layer through the gas distributor and the liquid distributor. The catalyst bed layer is fixed in the reactor with the upper and lower ceramic balls and the upper and lower supporting sieve plates. The plurality sets of baffles are arranged in the lower part of the reactor. Overflow weirs are arranged on the two sides. With prior arts, gas and liquid phase feeds are not uniformly distributed, which does not facilitate sufficient reaction; and liquid products contain gas entrainments. With the reactor provided by the invention, the above problems can be solved. The multiphase reactor can be used in industrial productions for producing ethylene carbonate with ethylene oxide and carbon dioxide.

Description

technical field [0001] The invention relates to a gas-liquid-solid three-phase reactor for the synthesis of ethylene carbonate, more specifically a gas-liquid-solid three-phase reactor for the synthesis process of ethylene carbonate catalyzed by ethylene oxide and carbon dioxide reactor. Background technique [0002] Ethylene carbonate (EC) is an excellent polar high boiling point solvent and an important raw material for organic synthesis. In the second half of the 20th century, researchers from various countries carried out numerous studies on the synthesis of carbonates, and many new synthesis methods and new catalysts were discovered. The traditional production method of EC is the phosgene method, but it has the disadvantages of long process flow, low yield, high cost, etc., and phosgene is highly toxic and pollutes seriously, and its use has basically been stopped in developed countries. with CO 2 Direct esterification with EO as raw materials to prepare ethylene car...

Claims

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Application Information

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IPC IPC(8): B01J8/02C07D317/38
Inventor 曹君贺来宾杨卫胜孙翟宗刘银川
Owner CHINA PETROLEUM & CHEM CORP
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