Industrial isooctane production system

Abstract

An industrial isooctane production system is composed of a raw material pretreatment unit, a reaction unit, a refrigeration compression unit, a refining and fractionating unit and a chemical treatmentunit. A light hydrocarbon removal tower top reflux tank of the raw material pretreatment unit is connected to a reactor of the reaction unit; a flash tank of the reaction unit is divided into three pipelines, one pipeline is connected to a compressor inlet liquid separation tank of the refrigeration compression unit, one pipeline is connected to an acid discharge tank of the chemical treatment unit, and one pipeline is connected to a distillate pickling tank of the refining and fractionating unit. According to the system, a traditional process system is improved and optimized, the energy consumption of the system is reduced, the product quality is improved, meanwhile, the operation reliability and stability of the system are improved, and compared with an existing domestic isooctane sulfate process, the industrial isooctane yield is increased by about 10%, the octane number is increased by about 2 units, and the acid consumption is reduced by about 30%; energy consumption is reduced by about 35%.

Description

technical field [0001] The invention belongs to the field of alkylation product production, and in particular relates to an industrial isooctane production system. Background technique [0002] With the increasingly stringent environmental protection requirements, higher requirements are put forward for the olefin content of motor gasoline. Industrial isooctane is the most ideal blending component for the production of clean high-octane gasoline. Currently, there are two methods for synthesizing isooctane, one is to obtain products through indirect alkylation of isobutene dimerization and hydrogenation, and the other is to obtain products through direct alkylation of isobutane and butene. The direct alkylation process can be divided into three processes according to the type of catalyst used in the reaction process. The liquid acid alkylation process of isobutane and butene is widely used in industry to prepare isooctane, mainly including raw material treatment system, rea...

AI Technical Summary

Problems solved by technology

For example, in Exxonmobil's ladder-type self-cooling alkylation process, olefins and isobutane are not mixed in advance. If the emulsion where the olefins are injected is an acid continuous phase, the olefins often first undergo a side reaction with the acid to form a mixed polymer, which affects In addition, the overall energy consumption is high, and the function control is relatively complicated, the operation is difficult, and the reliability of the system operation is affected.

Images