Condensation method and equipment of halogenated butyl rubber

Abstract

The invention relates to a condensation method of halogenated butyl rubber, and belongs to the technical field of butyl rubber synthesis. The condensation method comprises the following steps: performing halogenation reaction on a glue solution of butyl rubber, performing neutralization reaction, introducing an obtained product into a first condensation kettle, introducing hot water into the firstcondensation kettle, generating a first gas phase containing hexane in the first condensation kettle, condensing the first gas phase through a condenser, and introducing the condensed first gas phaseinto a hexane purification system for treatment; pumping colloidal particle water in the first condensation kettle into a second condensation kettle by using a first conveying pump, and generating asecond gas phase containing hexane in the second condensation kettle, and extracting the second gas phase from the second condensation kettle by using a first water ring vacuum pump and introducing the second gas phase into the hexane purification system to be treated after being condensed through a condenser. The steam waste heat at the top of the first condensation kettle is recycled by adoptinga mechanical heat pump, so that the steam consumption in the halogenated butyl production process is reduced, and the use amount of circulating water consumed by condensed steam is also reduced.

Description

technical field [0001] The invention relates to a coagulation method of halogenated butyl rubber, which belongs to the technical field of butyl rubber synthesis. Background technique [0002] Coagulation is an important step in the production of halobutyl rubber. It is the operation of removing hexane by neutralizing and adding additives to the coagulation tank after neutralizing the glue generated by the polymerization reaction. It also facilitates subsequent dehydration. In the prior art, the coagulation usually adopts a three-pot differential pressure process, and the second and third coagulation pots need to maintain a relatively low pressure to ensure the removal of hexane. The existing process uses a steam jet pump as a vacuum device to maintain the lower pressure of the second and third condensation tanks, and the steam medium and the pumped hexane-containing gas are returned to the first condensation tank to replenish the first condensation tank. Steam, thereby re...

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Problems solved by technology

[0003] The main problems of adopting the above scheme are: ① high energy consumption, due to the low injection efficiency of the steam jet pump, a large amount of low-pressure steam needs to be consumed to maintain the low pressure of the second and third condensation kettles; ② high material consumption, due to the low pressure of the second 2. The hexane-containing gas sucked by the third condensation tank needs to be returned to the first condensation tank, which obviously increases the load of the first condensation tank to remove hexane

In addition, the system adopts a process of connecting three kettles in series. The second and third coagulation kettles have similar functions. When one of the equipment is abnormal due to mechanical failure or process fluctuation, the whole line must be shut down for processing, and the flexibility of the device is very poor.

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