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Catalyst utilization method and device in ethylidene norbornene isomerization synthesis process

A technology for ethylidene norbornene and isomerization synthesis, which is applied in the chemical industry and can solve problems such as reducing work efficiency and removing deactivated catalysts.

Active Publication Date: 2016-03-23
SHANGHAI HUACHANG ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the equipment cannot remove the deactivated catalyst while running. After a period of operation, it needs to be shut down to process the spent catalyst, which reduces the work efficiency.

Method used

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  • Catalyst utilization method and device in ethylidene norbornene isomerization synthesis process

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Embodiment 1

[0067] In a 15,000-ton / year ENB isomerization synthesis device, according to the method and device of the present invention, it is used to maximize the high-efficiency utilization of the catalyst, and at the same time play a role in purifying the discharges of all levels and the final product, and continuously operate the device The spent catalyst is removed. Its specific operation process and effects are described as follows:

[0068] 1. Operating conditions

[0069] The device adopts 4-stage series stirred reactors, with a single full volume of 12.5m 3 , filling coefficient 0.6, material filling volume 7.5m 3 . The reactor is operated intermittently, the residence time of a single reactor is 8 hours, and the reaction unloading time is 1 hour. The feed to the first-stage reactor is 8063kg / time, the output to the last-stage reactor is 7200kg / time, and the catalyst feed is 237kg / time. The graded cyclone at all levels is composed of six DN50 cyclone tubes connected in paral...

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Abstract

The invention relates to a method and device for utilizing catalyst in the ethylidene norbornene isosynthesis technology, and provides the method for utilizing the catalyst in the ethylidene norbornene isosynthesis technology. The method comprises the steps that a multi-level stirring reaction kettle set is composed of two or more stirring reaction kettles connected in series; fresh vinyl norbornene raw materials continuously enter a reaction system to be reacted through the first-level stirring reaction kettle in the multi-level stirring reaction kettle set, the obtained ethylidene norbornene passes through grading whirlcones arranged among the multiple levels of stirring reaction kettles in the multi-level stirring reaction kettle set, liquid and solid separation is carried out on the obtained ethylidene norbornene , and then continuous discharging is carried out through the last-level stirring reaction kettle in the multi-level stirring reaction kettle set; the fresh catalyst continuously enters the reaction system through the last-level stirring reaction kettle to be involved in the reaction and enters the grading whirlcones arranged among the multiple levels of stirring reaction kettles in the multi-level stirring reaction kettle set, liquid and solid separation is carried out on the fresh catalyst, and then the fresh catalyst is discharged out of the first-level stirring reaction kettle.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for realizing reverse transfer of materials and catalysts and continuous removal of spent catalysts through graded cyclones in a multi-stage stirred reactor for isomerization of ENB (ethylidene norbornene). Specifically, the present invention provides a method and device for improving catalyst usage efficiency and product quality in the ENB isomerization synthesis process. Background technique [0002] Ethylidene norbornene, referred to as ENB, is a diene monomer widely used in EPDM (ethylene propylene diene) rubber, competing with the previously used 1,4-hexadiene and dicyclopentadiene. As the third monomer, ethylene-propylene rubber can be obtained by copolymerizing with ethylene and propylene. The vulcanization speed of the prepared rubber is faster than other third monomers, which can overcome the disadvantage of slow vulcanization speed of ethylene-propylene rubber. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/25C07C13/43
Inventor 邱阳汪华林李剑平付鹏波沈其松桑伟迟
Owner SHANGHAI HUACHANG ENVIRONMENT PROTECTION
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