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Microreactors, systems and liquid acid alkylation methods for liquid-liquid multiple phase applications

A technology of microreactors and multiphase reactions, applied in chemical instruments and methods, chemical/physical/physicochemical reactors, chemical/physical processes, etc., can solve limited applications and affect the reaction effect of tubular membrane microreactors, etc. question

Active Publication Date: 2019-11-12
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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  • Microreactors, systems and liquid acid alkylation methods for liquid-liquid multiple phase applications
  • Microreactors, systems and liquid acid alkylation methods for liquid-liquid multiple phase applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

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

[0084] 1) sleeve type membrane emulsion microreactor 25, structure such as figure 1 shown;

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

[0086] 3) a heavy phase storage tank 24, which is connected to the feed pipe 11 through a heavy phase delivery pipeline, and a heavy phase delivery pump 23 is arranged 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) De-isobutanizer 27 and de-n-butanizer 28, de-isobutanizer 27 is connected with the light phase outlet of acid hydrocarbon separator 26 top, and the top of de-isobutanizer 27 is connected with light phase storage tank 21 The bottom of de-isobutanizer 27 ...

Embodiment 3

[0090] A kind of liquid acid alkylation method using isobutane and olefin as raw material, utilizes the system of embodiment 2 to carry out, and the steps are as follows:

[0091] The mixture of olefins and isobutane is stored in the light phase storage tank 21, and enters the reactor 25 after metering through the light phase delivery pump 22; the liquid acid catalyst is stored in the heavy phase storage tank 23, and enters after being metered through the heavy phase delivery pump 24 Reactor 25; hydrocarbons pass through the membrane tube 1 as the dispersed phase, enter the microchannel 3 in the form of microemulsion droplets, and then mix and react with the continuous phase of the liquid acid catalyst in the microchannel, and the reaction is carried out 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 5min; the reaction product enters the acid ...

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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 synthesis chemistry, in particular to a liquid-liquid multiphase application microreactor, a system and a liquid acid alkylation method. Background technique [0002] Environmental issues continue to promote the upgrading of oil quality, and the alkylated oil produced by the alkylation reaction of isobutane and olefins, as the most ideal clean gasoline component, faces unprecedented development opportunities and space. As of 2015, my country's carbon tetraalkylation production capacity has exceeded 10 million tons per year, and concentrated sulfuric acid and hydrofluoric acid technologies are dominant in industrial production, and sulfuric acid is the main method. The catalytic reaction process of the traditional liquid acid alkylation process has low interphase transfer-separation efficiency and large catalyst consumption, which leads to serious environmental pollution of the catalyst, large proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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