РАЗВИТИЕ ТЕХНОЛОГИИ ПОЛУЧЕНИЯ ВЫСОКОКОНЦЕНТРИРОВАННОГО ИЗОБУТИЛЕНА

The technology of selection of a polymerization purity isobutylene, what operating at plants in Russia, is based on the synthesis of tert-butyl alcohol (TBA) by hydration of isobutylene contained in the feed hydrocarbon fractions, followed by isolation and decomposition of TBA. The isobutylene hydration is carried out in a reactive-extraction reactor in the presence of a sulfate cationite catalyst and countercurrent flow reactants. In the article the way of a process in a flow reactor at a ratio of reactants close to the stoichiometric is proposed to upgrade the existing technology. The dependence of the conversion of isobutylene and by-products (dimers, sec-butanol) from the starting feed hydrocarbon and parameters of the process is studied. The isobutane-isobutylene (IIF), and butylene-isobutylene (BIF) fractions are used as feed. It is shown that the conversion of isobutylene fraction less for BIF feed, and the concentration of by-products for more than in case of IIF feed. The scheme of the process of synthesis of TBA with a flow-through reactor and reaction-extraction type is proposed, which allows to increase the capacity of existing production, while reducing power consumption of the whole process through a concentrated solution TBA at outlet from the flow reactor and obtain isobutylene purity of at least 99, 99 wt.%.