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A method for continuously adding catalyst to acetylene dimerization reactor

A technology for catalysts and reactors, which is applied in the field of continuous catalyst addition to acetylene dimerization reactors, and can solve problems such as parking economic losses

Active Publication Date: 2021-06-08
山西霍家长化合成橡胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for continuously adding catalyst to an acetylene dimerization reactor, so as to solve the problem that the traditional method needs to stop when adding catalyst so as to bring large economic losses

Method used

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  • A method for continuously adding catalyst to acetylene dimerization reactor
  • A method for continuously adding catalyst to acetylene dimerization reactor
  • A method for continuously adding catalyst to acetylene dimerization reactor

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Experimental program
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Embodiment 1

[0029] A kind of acetylene dimerization reactor 7 continuously replenishes catalyst method, and acetylene dimerization reaction is in such as figure 1 Carry out in the shown reactor 7, catalyst is placed in the catalyst storage tank 9, the catalyst storage tank 9 upper end is communicated with the catalyst outlet pipe 6, is communicated with the upper connection pipe 4 on the reactor 7, between the catalyst outlet pipe 6 and the upper connection pipe 4 Connected via hose 8.

[0030] This method comprises the following steps:

[0031] A. Calculate the dosage of the remaining catalyst in the reactor 7: Calculate the liquid level height of the catalyst in the reactor 7 through the pressure difference of the acetylene gas entering and leaving the reactor 7. Specifically, the calculation formula is: pressure difference=catalyst density*g*catalyst Height, that is, in the process of entering the reactor 7 by acetylene gas, the pressure difference between the air pressure in the reac...

Embodiment 2

[0037] Compared with Embodiment 1, this embodiment also includes: Figure 4 As shown, the right end of the upper connecting pipe 4 is fixed with a circular mesh plate 11, and the mesh plate 11 is hinged with a stopper 10. The specific setting is: the edge of the mesh plate 11 is provided with a through hole, and the torsion spring passes through the through hole. A cylindrical pin 12 is rotatably connected, and the cylindrical pin 12 and the blocking piece 10 are integrally formed. The radius of the blocking piece 10 is greater than the radius of the mesh plate 11, and the blocking piece 10 can block all the mesh holes on the mesh plate 11. The left end of the cylindrical pin 12 is integrally formed with a rotating rod 13, the rotating rod 13 runs through the side wall of the upper connecting pipe 4 and extends to the outside of the upper connecting pipe 4, and the rotating rod 13 and the side wall of the upper connecting pipe 4 are rotationally connected.

[0038] In the init...

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Abstract

The invention belongs to the field of rubber production, and in particular relates to a method for continuously adding catalyst to an acetylene dimerization reactor. When it is necessary to open the upper connecting pipe of the reaction tower, the valve of the upper connecting pipe is heated to melt the catalyst crystal. By adopting the method of the invention, the problem that the catalyst needs to be stopped during the process of adding the catalyst can be solved.

Description

technical field [0001] The invention belongs to the field of rubber production, and in particular relates to a method for continuously adding catalyst to an acetylene dimerization reactor. Background technique [0002] Neoprene rubber, also known as chloroprene rubber, is made of chloroprene (ie 2-chloro-1,3-butadiene) as the main raw material through homopolymerization or copolymerization of a small amount of other monomers. [0003] In China, the production process of chloroprene rubber is mainly the acetylene method, which includes acetylene generation, vinyl acetylene synthesis and chloroprene synthesis. The synthesis process of vinyl acetylene is also called acetylene dimerization reaction. The acetylene dimerization reaction is carried out in a reactor equipped with a catalyst. After a long time of reaction, the inlet valve of the upper nozzle of the reactor is easily blocked by the crystallized catalyst, resulting in difficulty To open, the traditional method is to o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00C07C2/38C07C11/30
CPCB01J19/0006C07C2/38C07C11/30
Inventor 向伟陈耘文国礼邹泽平江红军
Owner 山西霍家长化合成橡胶有限公司