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Fluidized-bed reaction device and fluidization reaction method for hydrogenation of nitrobenzene

A technology of fluidized bed reaction and fluidized bed reactor, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems of low fluidization quality, low gas-solid contact efficiency in fluidized bed, bubble Oversize and other problems, to achieve the effect of improved fluidization quality, good gas-solid contact effect, and increased retention

Active Publication Date: 2020-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems mainly solved by the present invention is the low gas-solid contact efficiency in the fluidized bed in the prior art, the bubble size is too large, and the fluidization quality is low. An improved fluidized bed reaction device is provided. The bed reactor is equipped with at least one set of composite components, so that when the gas and catalyst particles pass through the baffles, holes or slits of the composite components, the air bubbles and particle clusters are broken, which effectively improves the fluidization quality.

Method used

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  • Fluidized-bed reaction device and fluidization reaction method for hydrogenation of nitrobenzene
  • Fluidized-bed reaction device and fluidization reaction method for hydrogenation of nitrobenzene

Examples

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Effect test

Embodiment 1

[0029] Such as figure 1 The device for producing aniline by hydrogenation of nitrobenzene is shown. The average particle size of the catalyst is 360 mu m, the largest angle α in the triangular longitudinal section of the left baffle and the right baffle is 135°. The sides of the prism where the longer side of the triangular longitudinal section of the left baffle and the right baffle of the composite member are located are parallel to each other and placed vertically. The sides of the left baffle and the right baffle of the composite component have holes and (or) slits respectively, and the ratio of the total area of ​​the holes and (or) slits to the area of ​​the blades is 15%. Four composite components are set in the fluidized bed reactor, and the composite components are staggered and evenly distributed in the reactor, and the acute angle / right angle between two adjacent composite components in the vertical direction is 90°, and the vertical direction The vertical dista...

Embodiment 2

[0033] Such as figure 1 The device for producing aniline by hydrogenation of nitrobenzene is shown. The average particle size of the catalyst is 360 mum, the largest angle α in the triangular longitudinal section of the left baffle and the right baffle is 145°. The sides of the prism where the longer side of the triangular longitudinal section of the left baffle and the right baffle of the composite member are located are parallel to each other and placed vertically. The sides of the left baffle and the right baffle of the composite component have holes and (or) slits respectively, and the ratio of the total area of ​​the holes and (or) slits to the area of ​​the blades is 15%. Four composite components are set in the fluidized bed reactor, and the composite components are staggered and evenly distributed in the reactor, and the acute angle / right angle between two adjacent composite components in the vertical direction is 90°, and the vertical direction The vertical distan...

Embodiment 3

[0035] Such as figure 1 The device for producing aniline by hydrogenation of nitrobenzene is shown. The average particle size of the catalyst is 360 mu m, the largest angle α in the triangular longitudinal section of the left baffle and the right baffle is 90°. The sides of the prism where the longer side of the triangular longitudinal section of the left baffle and the right baffle of the composite member are located are parallel to each other and placed vertically. The sides of the left baffle and the right baffle of the composite component have holes and (or) slits respectively, and the ratio of the total area of ​​the holes and (or) slits to the area of ​​the blades is 15%. Four composite components are set in the fluidized bed reactor, and the composite components are staggered and evenly distributed in the reactor, and the acute angle / right angle between two adjacent composite components in the vertical direction is 90°, and the vertical direction The vertical distan...

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Abstract

The invention relates to a fluidized-bed reaction device and a fluidization reaction method for hydrogenation of nitrobenzene. The invention mainly aims to solve the problems of low gas-solid contactefficiency, large bubble size, low fluidization quality and the like in a fluidized bed. According to a technical scheme in the invention, at least one group of composite components are arranged in afluidized-bed reactor, so when gas and catalyst particles pass through the components, bubbles and particle clusters are broken, fluidization quality is effectively improved, and the above technical problems are well solved; and the device and the method can be applied to industrial production of gas-phase catalytic hydrogenation of nitrobenzene.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment and organic chemical industry, and relates to a fluidized bed reaction device and a fluidized reaction method for hydrogenation of nitrobenzene. Background technique [0002] Aniline is an important basic organic chemical raw material and fine chemical intermediate. There are more than 300 kinds of downstream products produced from aniline, which are widely used in dyes, medicines, pesticides, explosives, spices, rubber, synthetic materials and other industries. In recent years, with the rapid rise of the polyurethane industry in my country and the world, aniline, one of the irreplaceable basic raw materials for its main raw material MDI (4,4-diphenylmethane diisocyanate), has achieved extraordinary rapid development. develop. [0003] At present, there are three methods for industrial production of aniline, namely catalytic hydrogenation of nitrobenzene, ammoniation of phenol and reduc...

Claims

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Application Information

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IPC IPC(8): B01J8/28C07C209/36C07C211/46
CPCB01J8/28C07C209/36C07C211/46
Inventor 徐益姜新亮华兵尹春荣
Owner CHINA PETROLEUM & CHEM CORP
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