Methyl chloride drying device, recovering system and recovering method, and butyl rubber production system

Abstract

The invention discloses a methyl chloride drying device used for production of butyl rubber, as well as a methyl chloride recovering system and a recovering method and a butyl rubber production system which employ the methyl chloride drying device. The methyl chloride drying device comprises at least four drying towers, a drying pipeline used for drying methyl chloride, a first regeneration / passivation pipeline and a second regeneration / passivation pipeline, wherein the first and the second regeneration / passivation pipelines are used for regeneration or passivation of drying agents in the drying tower; and the drying pipeline, the first regeneration / passivation pipeline and the second regeneration / passivation pipeline are independent from one another, and the four drying towers can be connected into the drying pipeline and the first and the second regeneration / passivation pipelines in parallel respectively in a connected or disconnected manner. The device can recover and circulate methyl chloride continuously so as to ensure long-term continuity of production of butyl rubber.

Description

technical field [0001] The invention relates to a methyl chloride drying device, a recovery system and a method in the production of butyl rubber, and a butyl rubber production system. Background technique [0002] Butyl rubber (11R) is a copolymer of isobutylene and a small amount of isoprene. Due to the structural characteristics of butyl rubber, it not only has good air tightness and low air permeability, but also has the characteristics of aging resistance, corrosion resistance, and electrical insulation properties. It is mainly used in the manufacture of tire inner tubes, electrical insulation materials, and waterproof rolls. Materials, sealing products and pharmaceutical products and other fields. The industrial production process of butyl rubber is complex and technically difficult. At present, Exxon Company of the United States and Bayer Company of Germany still monopolize the global butyl rubber production and market, and their production capacity accounts for abo...

AI Technical Summary

Problems solved by technology

In addition, the drying cycle of the drying tower is significantly affected by the butyl rubber polymerization process. If the reaction is not good, too much water will be entrained in MeCl, which will seriously shorten the drying cycle of the drying tower.

However, the regeneration cycle of the drying tower is fixed, which will lead to a state where there is no spare drying tower available after the desiccant adsorption of one tower is saturated

In this case, the butyl rubber device can only be stopped for processing

[0010] 2. After the desiccant has been used for a period of time, it must be replaced with a new desiccant

[0011] 3. Because there is only one regeneration system, only one tower can be regenerated at a time

You have to wait for a Dryer to regenerate before proceeding to the next Dryer, which also results in a state where there are no Dryers available for drying

Moreover, during regeneration, the equipment is in a state of high temperature, strong acid environment, and dirty materials. The heater, alkali washing tower and compressor are prone to failure, and the lye and desiccant dust are easy to block the pipeline. These factors will also affect the regeneration operation of the drying tower, thus Resulting in shutdown of butyl rubber production unit

[0012] The above problems seriously restrict the continuous production capacity of butyl rubber production equipment and limit the increase of butyl rubber output.

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