Cleaning solvent and cleaning method for butyl rubber polymerization reactor

Abstract

The invention provides a cleaning solvent and a cleaning method for a butyl rubber polymerization reactor and relates to the technical field of butyl rubber production. The cleaning solvent is the mixture of C4-C10, C14, C15 saturated hydrocarbons, wherein the content of the C10, C14, C15 saturated hydrocarbons is 20wt% to 70wt%; the distillation range is 110 DEG C to 250 DEG C; the aniline point is lower than 100 DEG C; and the bromine value is 1000mg / 100g. The cleaning method of the cleaning solvent comprises the following steps: pumping the solvent into the reactor, cleaning the reactor, and recycling the solvent flowed from the reactor into a storage jar so as to circularly clean, wherein the solvent in the storage jar is pumped out from another outlet at the same time so as to regenerate through heating and reuse. After the reactor is cleaned, the cleaning solvent can be continuously and thoroughly regenerated. The solvent has good cleaning effect and requires short time for cleaning reactor. The cleaning method thereof also shortens the regeneration time, increases the effective operation ratio and saves the energy consumption by more than 15%.

Description

technical field [0001] The present invention relates to the field of rubber industry, in particular to the technical field of reactor cleaning in the industrial production process of butyl rubber. Background technique [0002] Butyl polymerization is an exothermic reaction that must be performed at extremely low temperatures to obtain useful commercial products. The polymerization reaction is a cationic reaction with an extremely fast speed. In the industrial production process, due to the glue on the heat exchange surface of the reactor, the heat exchange capacity decreases and the reaction temperature rises. When the temperature rises to the required temperature upper limit, the reactor must be Suspend production, cut out for cleaning to restore heat transfer capacity. [0003] Cleaning needs to be done with a solvent, and the choice of cleaning solvent must meet several conditions, ①It can dissolve butyl rubber very well, and the cleaning time is appropriate; ②It is easy...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of long cleaning time of the butyl rubber polymerization reactor in the prior art, low effective operating rate of the reactor, and high energy consumption and material consumption, the present invention provides a cleaning solvent without unsaturated hydrocarbons, which can improve the reaction rate. The cleaning effect of the reactor is reduced, the cleaning time is reduced, the regeneration is easy, the loss is small, the process operation is simplified, the effective operating rate of the reactor is improved, the production technology level is improved, and the energy consumption and material consumption are reduced.