Pyromellitic dianhydride reactor

A technology of pyromellitic dianhydride and reactor, which is applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve problems such as insufficient reaction, increased side reactions, and reduced reaction speed, so as to avoid side effects Response, intake stabilization, effect of increased temperature fluctuations

Inactive Publication Date: 2020-04-10
SHIJIAZHUANG HAOPU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this process, insufficient air intake will lead to a decrease in reaction speed, high hot spot temperature, and unstable reaction gas feed will lead to insufficient reaction. The reaction hot spot temperature fluctuates too much, which will increase local side reactions and reduce selectivity.

Method used

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  • Pyromellitic dianhydride reactor
  • Pyromellitic dianhydride reactor
  • Pyromellitic dianhydride reactor

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] see Figure 1-3 , a pyromellitic dianhydride reactor, comprising a tank body 1, one side of the bottom of the tank body 1 is provided with a reaction gas outlet 2, the top of the tank body 1 is provided with a reaction gas inlet 3, and the upper end of the tank body 1 There is a molten salt inlet 4 on one side of the tank body 1, a molten salt outlet 5 on one side of the lower end of the tank body 1, a support leg 6 is fixedly installed on the bottom of...

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Abstract

The invention relates to the technical field of chemical equipment and discloses a pyromellitic dianhydride reactor. The pyromellitic dianhydride reactor comprises a tank body, wherein a reaction gasoutlet is formed in one side of the bottom of the tank body; a reaction gas inlet is formed in the top of the tank body; a molten salt inlet is formed in one side of the upper end of the tank body; amolten salt outlet is formed in one side of the lower end of the tank; supporting legs are fixedly mounted at the bottom of the tank body; an air inlet is formed in one side of the top of the tank body; an air inlet pipe is fixedly mounted at the lower end in the tank body; and one end of the air inlet pipe penetrates through the air inlet, extends out of the tank body and is fixedly mounted withan air blower. According to the pyromellitic dianhydride reactor, a reaction gas inlet pipe is horizontally arranged above row tubes, so reaction gas feed of each row tube is uniform, and the situation of over-high temperature is avoided,; and the air inlet pipe is horizontally arranged above the row tubes, so an air quantity is sufficient, an air speed can be controlled, and reaction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of biochemical equipment, in particular to a pyromellitic dianhydride reactor. Background technique [0002] Pyromellitic dianhydride homoanhydride is widely used and is an important chemical raw material. There are many ways to prepare pyromellitic dianhydride, among which the gas phase oxidation process of durene is the most commonly used. The process is characterized by simple process, except There is no other oxidant outside the air, nor the catalytic separation process necessary for the liquid phase, and it can be produced continuously, and it is easy to realize automatic operation. When using this process, insufficient air intake will lead to a decrease in reaction speed, excessively high hot spot temperature, and unstable reaction gas feed will lead to insufficient reaction and large fluctuations in reaction hot spot temperature, which will increase local side reactions and reduce selectivity. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/06C07D493/04
CPCB01J8/06B01J8/0278C07D493/04
Inventor 张科田彦博张普李杰王亚伟许志强王超姚建杰赖雅娟
Owner SHIJIAZHUANG HAOPU CHEM
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