Steam stripping agent system for removing solvent in halogenated butyl rubber

Abstract

The invention relates to a steam stripping agent system for removing a solvent in halogenated butyl rubber, and belongs to the technical field of petroleum chemical engineering. The steam stripping agent system comprises a steam stripping agent preparation tank, a steam stripping agent buffer tank, a steam stripping agent conveying pump, a halogenation flash tank and an air cooler, wherein the steam stripping agent preparation tank is communicated with the steam stripping agent buffer tank through a tank communication line; the steam stripping agent buffer tank is communicated with the steam stripping agent conveying pump through a tank-pump communicating line; the steam stripping agent conveying pump is communicated with the halogenation flash tank through a second material inlet pipe; the halogenation flash tank is communicated with the air cooler through a vapor phase conveying pipe. By adopting the technique, the steam stripping agent system has the advantages that the amount of residual solvent carried in rubber particles is reduced, the influence to the environment by the exhausted solvent gas in the post-treatment procedure is reduced, the safety production coefficient is improved, and the wall-hanging condition of rubber liquid in the halogenation flash tank is relieved; the purposes of improving the operation property of the device and the product property, decreasingmaterial consumption and reducing pollution to environment are realized.

Description

technical field [0001] The invention relates to a stripping agent system for removing solvent from halogenated butyl rubber, which belongs to the technical field of petrochemical industry. Background technique [0002] At present, the production process of halogenated butyl rubber is to dissolve ordinary butyl rubber in slurry with hexane solvent to form glue, and then mix with Br 2 Addition reaction occurs to generate halogenated butyl rubber glue; then neutralize and wash with lye to neutralize HBr and unreacted Br 2 , and wash and remove the salts generated during the neutralization process; then send it to the solvent removal recovery system, and remove the hexane solvent by steam stripping and flash evaporation. The solvent is recovered and reused, and the halogenated butyl rubber particle water is sent to the post-treatment process to finally obtain the halogenated butyl rubber product. [0003] The solvent removal and recovery of the present halogenated butyl rubber...

AI Technical Summary

Problems solved by technology

In the flash tank, the glue is fully mixed with hot water. Under a certain degree of vacuum, the solvent is stripped from the colloidal water to the gas phase by steam. The free solvent is relatively easy to separate and remove, but the Solvent removal is difficult, and a larger amount of steam is required to remove the solvent contained in the colloidal particles. At present, this process consumes about 400kg of steam per ton of glue, and a large amount of water vapor is evaporated at the same time, which increases the cooling capacity of the top cooler of the flash tank. Load; due to the difficulty in removing the solvent contained in the colloidal particles, some solvents still go to the post-treatment process with the colloidal water, the unit consumption of the solvent is high, about 35kg / t, and the volatile content of rubber products is high. The smell of solvents in the workshop is strong

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