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A kind of method that utilizes microchannel reactor to carry out olefin addition reaction

A technology of microchannel reactor and microchannel reaction, which is applied in the field of olefin addition reaction, can solve the problems of low production safety, complex reaction process, high production cost, etc., and achieve the effect of high atom utilization rate and simplified purification process

Active Publication Date: 2019-02-12
ZHEJIANG RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current olefin addition technology generally adopts catalytic addition technology, which not only has a complicated reaction process, but also has disadvantages such as low reaction selectivity and high production cost.
Elemental fluorine gas is the most active element in the periodic table of elements. It can undergo addition reaction with olefins in a very short time. The reaction process is violent and the production safety is low.

Method used

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  • A kind of method that utilizes microchannel reactor to carry out olefin addition reaction
  • A kind of method that utilizes microchannel reactor to carry out olefin addition reaction
  • A kind of method that utilizes microchannel reactor to carry out olefin addition reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0033] optional attachment figure 2 1 piece of corning straight channel module (as a pre-mixing preheating module), 6 pieces of corning "heart-shaped" microchannel reaction module, 1 piece of corning straight channel module (as a quenching module), according to the attached image 3 The reaction process shown constitutes a continuous flow microchannel reaction system. Heat transfer oil is used as the reaction heat exchange medium. According to the forced heat transfer principle of the microchannel reactor, only two temperature measuring points are set at the reactor inlet and outlet. Before the reaction, the microchannel reaction system and connecting pipelines were dewatered and degreased respectively, and the system and connecting pipelines were passivated with fluorine gas using 5mol% fluorine-nitrogen mixed gas, and the air tightness inspection was carried out at 1.0MPa. by attaching image 3 1 liquid-phase pump (such as a diaphragm metering pump) in the middle, continuo...

Embodiment 2

[0037] Use the same Corning microchannel reactor as in Example 1, and follow the same connection and control methods. In this example, the reaction conditions were changed.

[0038] Set the temperature of the heat exchanger to -5°C, which is the reaction temperature. Set the feed rate of perfluorohexene to 20 g / min, and the feed rate of 20 mol% fluorine-nitrogen mixed gas to 8.6 L / min. The reaction residence time is 0.017s. Set the reaction pressure to 0.1MPa. The reaction raw material perfluorohexene enters the "heart-shaped" microchannel reaction module after passing through the microchannel premixing and preheating module, and the fluorine and nitrogen mixed gas directly enters the microchannel reaction module through the gas mass flow meter to react with perfluorohexene. After passing through the quenching module, the reaction crude product is processed by post-system deacidification for analysis.

[0039] Gas chromatographic analysis of the reaction product shows that...

Embodiment 3

[0041] Use the same Corning microchannel reactor as in Example 1, and follow the same connection and control methods. In this example, the reaction conditions were changed.

[0042] Set the heat exchanger temperature to 50°C, which is the reaction temperature. Set the feed rate of perfluorohexene to 10 g / min, and the feed rate of 30 mol% fluorine-nitrogen mixed gas to 4.3 L / min. The reaction residence time is 0.030s. Set the reaction pressure to 0.1MPa.

[0043] The reaction raw material perfluorohexene enters the "heart-shaped" microchannel reaction module after passing through the microchannel premixing and preheating module, and the fluorine and nitrogen mixed gas directly enters the microchannel reaction module through the gas mass flow meter to react with perfluorohexene. After passing through the quenching module, the reaction crude product is processed by post-system deacidification for analysis.

[0044] The reaction product was analyzed by gas chromatography, and ...

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Abstract

The present invention discloses a method for carrying out addition on olefin and fluorine gas by using a microchannel reactor, wherein C2-C9 olefin or fluoroolefin reacts with F2 in a microchannel reaction module to obtain the corresponding fluoroalkane. According to the present invention, with the method, the purity of the prepared fluoroalkane is high, and the method has the cost advantage.

Description

technical field [0001] The invention relates to a method for carrying out olefin addition reaction using a microchannel reactor, in particular to a method for using a microchannel reactor for carrying out olefin addition reaction with fluorine gas. Background technique [0002] The addition reaction of olefins is an important chemical industry reaction, and the addition reaction of elemental fluorine gas with olefins is one of the important ones. Fluorine-containing organic compounds can be produced through the addition of olefins and fluorine gas to produce refrigerant products such as difluoroethane, trifluoroethane, tetrafluoroethane, difluoropropane, and difluorobutane, and can also be produced through perfluoroolefins Addition with fluorine gas to generate perfluorinated organic compounds, producing products such as perfluoroethane, perfluoropropane, perfluorobutane, perfluoropentane, perfluorohexane, perfluorononane, etc. Such perfluorinated compounds can be used in e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/08C07C17/04C07C17/02
Inventor 陈慧闯章祺徐卫国丁元胜
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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