Microreactor and system for liquid-liquid multi-phase reaction and liquid acid alkylation method

Abstract

The invention relates to the technical field of organic synthesis chemistry and particularly relates to a microreactor and system for a liquid-liquid multi-phase reaction and a liquid acid alkylation method. The microreactor comprises an inner pipe and an outer casing pipe, the inner pipe and the outer casing pipe are coaxial, the inner tube and the outer casing pipe form an annular microchannel, a first diversion pipe, an inner film pipe and a second diversion pipe having the same external diameters are orderly connected to form the inner pipe, the upper side of the outer casing pipe is provided with a heavy phase inlet, an end cap is arranged between one end of the outer casing pipe and the wall of the first diversion pipe, the other end of the outer casing pipe is provided with a product outlet, the heavy phase inlet and the inner pipe are arranged so that a heavy phase flow and a light phase flow contact in a parallel flow way and a distance-determination structure is arranged in the annular microchannel. The system comprises the microreactor, a light phase storage device, a heavy phase storage device and a separation device. The liquid-liquid phase interfaces of the microreactor are increased by 10 times or more than that of the general reactor so that the small size, high efficiency, high selectivity, large treatment amount, small energy consumption and high universality are realized.

Description

Technical field

[0001] The invention relates to the technical field of organic synthetic chemistry, in particular to a liquid-liquid multi-phase reverse application microreactor, a system and a liquid acid alkylation method. Background technique

[0002] Environmental issues continue to promote the upgrading of oil quality. As the most ideal clean gasoline component, the alkylated oil produced by the alkylation of isobutane and olefins faces unprecedented development opportunities and space. As of 2015, my country's C4 alkylation production capacity has exceeded 10 million tons per year. The two technologies of concentrated sulfuric acid and hydrofluoric acid are dominant in industrial production, and sulfuric acid is the main method. The traditional liquid acid alkylation process has interphase transfer-low separation efficiency and high catalyst consumption, which leads to serious environmental pollution of the catalyst, huge process equipment, and low reliability of the operat...

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