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

A micro-reactor, multi-phase reaction technology, applied in chemical instruments and methods, chemical/physical/physical chemical reactors, chemical/physical processes, etc. question

Active Publication Date: 2017-10-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This affects the reaction effect of the tubular membrane microreactor and limits its application

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] One kind of liquid-liquid is more opposite to the application of microreactor, such as figure 1 As shown, it is composed of a coaxially fixed inner tube, a sleeve 2 and a heat exchange tube 12, wherein the inner tube includes a draft tube 9, a membrane tube 1, and a draft tube 5 connected in order from left to right, and the draft tube 9 is connected to the membrane tube 1, the flow guide tube 5 is isolated from the membrane tube 1 by the plug 4, the inner tube and the sleeve 2 form an annular microchannel 3 with a radial width of 0.5 mm, and one end of the inner tube is provided with an inlet The feed pipe 10 and the upper side of the sleeve 2 are provided with a feed pipe 11, which is a tangential feed pipe. One end of the sleeve 2 and the inner tube wall are closed with a plug 8, the other end is provided with a discharge tube 7, and the rest is closed with a plug 6, positioning strips 13 are distributed spirally in the annular microchannel 3, positioning strips 13 is...

Embodiment 2

[0083] A liquid-liquid multiphase reaction system, such as figure 2 As shown, it consists of the following devices:

[0084] 1) Casing type membrane emulsion microreactor 25, structure as figure 1 Shown

[0085] 2) The light phase storage tank 21 is connected to the feed pipe 10 through a light phase conveying pipeline, and a light phase conveying pump 22 is provided on the pipeline;

[0086] 3) The heavy phase storage tank 24 is connected to the feed pipe 11 through a heavy phase conveying pipeline, and a heavy phase conveying pump 23 is provided on the pipeline;

[0087] 4) Acid hydrocarbon separator 26, the heavy phase outlet at the bottom of which is connected to the heavy phase storage tank 24;

[0088] 5) The isobutane removal tower 27 and the n-butane removal tower 28. The isobutane removal tower 27 is connected to the light phase outlet of the upper part of the acid hydrocarbon separator 26, and the top of the isobutane removal tower 27 is connected to the light phase storage ...

Embodiment 3

[0090] A liquid acid alkylation method using isobutane and olefins as raw materials is carried out using the system of Example 2. The steps are as follows:

[0091] The mixture of olefin and isobutane is stored in the light phase storage tank 21, and enters the reactor 25 after being metered by the light phase transfer pump 22; the liquid acid catalyst is stored in the heavy phase storage tank 23, and enters after being metered by the heavy phase transfer pump 24 Reactor 25; The hydrocarbon passes through the membrane tube 1 as a dispersed phase, enters the microchannel 3 in the form of microemulsion droplets, and then mixes and reacts with the liquid acid catalyst continuous phase in the microchannel, and the reaction proceeds at 8°C, The reaction pressure is 0.4MPa, the volume ratio of raw material isobutane and olefin is 8:1, the volume ratio of catalyst and raw material is 1:1, and the reaction time is 5 minutes; the reaction product enters the acid hydrocarbon separator 26, a...

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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...

Claims

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Application Information

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IPC IPC(8): B01J19/00C10G50/00
CPCB01J19/0093B01J2219/00797C10G50/00C10G2300/1081C10G2300/1088
Inventor 周志茂公茂明王红岩崔改静张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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