Microchannel reactor for synthesizing difluorochloroethane

Abstract

The utility model relates to a microchannel reactor for synthesizing difluorochloroethane, which comprises a reactor shell and a plurality of high-purity quartz glass tubes, the interior of the reactor shell is divided into one or more than two layers of reaction cavities, and more than two high-purity quartz glass tubes which are symmetrical around the circumference are vertically arranged in each layer of reaction cavity. An ultraviolet lamp light source is vertically arranged at the symmetric center of the more than two high-purity quartz glass tubes, and the outer sides of the more than two high-purity quartz glass tubes are attached and are adhered through fluororubber glue and / or are hooped with a steel cooling pipeline through a fluororubber hoop; a buffer cavity is arranged between the upper and lower adjacent reaction cavities, and the high-purity quartz glass tubes in the upper and lower adjacent reaction cavities are not overlapped in the vertical direction. The device is simple in structure and stable and safe to use, the high-purity quartz glass tube and the steel cooling pipeline are bonded and hooped, reaction heat is removed quickly, and the reaction conversion rate is high.

Description

Technical Field

[0001] The present utility model relates to an industrial production device for chlorination reaction, specifically a microchannel reactor for synthesizing difluorochloroethane. Background Art

[0002] In the industrial production of difluorochloroethane, the photochlorination reaction of difluoroethane and chlorine in a reactor is a typical gas-gas homogeneous exothermic reaction. Existing steel-lined fluorine tube reactors and steel-lined graphite tower reactors with internal graphite coolers have difficulties in removing reaction heat, resulting in many side reactions, many product impurities, and waste of precious fluorine resources. Summary of the Invention

[0003] The present utility model provides a microchannel reactor for synthesizing difluorochloroethane, which has a simple structure, stable and safe use, fast removal of reaction heat, and high reaction conversion rate.

[0004] The technical solution adopted by the present utility model is: a microchannel reactor for synthesizing difluorochloroethane, including a reactor housing and a plurality of reaction channel tubes, characterized in that: the reaction channel tubes are made of high-purity quartz glass tubes, the reactor housing is divided into one layer or two or more reaction chambers, in each reaction chamber, two or more high-purity quartz glass tubes are vertically arranged symmetrically around the circumference, a UV light source is vertically arranged at the symmetry center of two or more high-purity quartz glass tubes, and the outer sides of two or more high-purity quartz glass tubes are attached and glued with fluororubber glue and / or clamped by fluororubber hoop rings to a steel cooling pipeline; a buffer chamber is arranged between adjacent upper and lower reaction chambers, and the high-purity quartz glass tubes in adjacent upper and lower reaction chambers do not overlap vertically.

[0005] A microchannel reactor for synthesizing difluorochloroethane, including a reactor housing and a plurality of reaction channel tubes, characterized in that: the reaction channel tubes are made of high-purity quartz glass tubes, the reactor housing is divided into one layer or two or more reaction chambers, in each reaction chamber, two or more high-purity quartz glass tubes are vertically arranged in an array, a UV light source is arranged on the same side of two or more high-purity quartz glass tubes, and the other sides of two or more high-purity quartz glass tubes are attached and glued with fluororubber glue and / or clamped by fluororubber hoop rings to a steel cooling pipeline; a buffer chamber is arranged between adjacent upper and lower reaction chambers, and the high-purity quartz glass tubes in adjacent upper and lower reaction chambers do not overlap vertically.

[0006] The UV light source is an LED.

[0007] The high-purity quartz glass tubes in adjacent upper and lower reaction chambers are offset vertically.

[0008] The outer side or the other side of the high-purity quartz glass tube is in plane or arc surface contact with the steel cooling pipeline.

[0009] The steel cooling pipe is a stainless steel cooling pipe.

[0010] The steel cooling pipe is filled with low-ion water or pure water coolant at 5-15°C.

[0011] The area of the outer side of the high-purity quartz glass tube is smaller than the area of the fitting side of the steel cooling pipe.

[0012] With the above technical solutions, the beneficial effects of the present utility model are as follows: After the raw materials 1,1-difluoroethane and chlorine are mixed, they are sent to the microchannel reactor and into the high-purity quartz glass tube. The reaction takes place under the irradiation of the LED ultraviolet light source. Each high-purity quartz glass tube is attached with a steel cooling pipe on the outside. The reaction heat is removed in a timely manner. Moreover, the high-purity quartz glass tube is adhered with fluororubber glue and / or clamped by a fluororubber hoop to the steel cooling pipe, so that the high-purity quartz glass tube is stably fixed. While improving the heat exchange removal effect, it avoids the damage caused by the impact of the gas-gas reaction in the high-purity quartz glass tube on the tube body, extends the service life, and ensures the use safety; combined with the upper and lower reaction chambers being multi-layer reaction chambers, after the reaction in the lower reaction chamber, it is sent to the upper reaction chamber with misaligned pipes through a buffer, which is beneficial to improving the reaction conversion rate, reducing the generation of by-products and the energy consumption of subsequent rectification. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model;

[0014] Figure 2 is Figure 1 top view structural diagram of

[0015] Figure 3 It is a schematic structural diagram of Embodiment 2 of the present utility model.

[0016] In the figure: reactor shell 1, high-purity quartz glass tube 2, LED ultraviolet light source 3, fluororubber glue layer 4, fluororubber hoop 5, steel cooling pipe 6, reaction chamber 7, buffer chamber 8. Detailed Embodiments

[0017] The following is further described with reference to the drawings.

[0018] Figure 1 、 2 As shown in the illustrated Embodiment 1, a microchannel reactor for synthesizing 1-chloro-1,1-difluoroethane includes a reactor shell 1, a high-purity quartz glass tube 2, an LED ultraviolet light source 3, fluororubber glue adhesion 4, a fluororubber hoop 5, and a steel cooling pipe 6. Three high-purity quartz glass tubes 2 are vertically arranged symmetrically around the circumference inside the reactor shell. The LED ultraviolet light source 3 is vertically arranged at the symmetry center of the high-purity quartz glass tubes. The outer side of the high-purity quartz glass tube 2 is a plane and is adhered by a fluororubber glue layer 4 and clamped by a fluororubber hoop 5 to the inner plane of the steel cooling pipe 6.

[0019] Figure 3 Embodiment 2 shown is a microchannel reactor for synthesizing difluorochloroethane, which includes a reactor housing 1, a high-purity quartz glass tube 2, an LED ultraviolet light source 3, fluororubber glue adhesion 4, a fluororubber hoop 5, and a steel cooling pipe 6. The interior of the reactor housing is divided into multiple upper and lower reaction chambers 7, with a buffer chamber 8 between the upper and lower reaction chambers. Three high-purity quartz glass tubes 2 arranged symmetrically around the circumference are vertically provided in the reaction chamber 7, and an LED ultraviolet light source 3 is vertically provided at the center of symmetry of the high-purity quartz glass tubes. The outer side of the high-purity quartz glass tube 2 is flat and is adhered through a fluororubber glue layer 4 and clamped by a fluororubber hoop 5 on the inner flat surface of the steel cooling pipe 6. The high-purity quartz glass tubes 2 in the upper and lower reaction chambers 8 are all connected to the buffer chamber 8 therebetween and are offset in the vertical direction.

[0020] In the above embodiment, the area of the outer side of the high-purity quartz glass tube is designed to be smaller than the area of the fitting side of the steel cooling pipe, which is convenient for improving the heat exchange efficiency.

[0021] In the above embodiment, the selected high-purity quartz glass tubes and LED ultraviolet light sources are arranged in a circular and central manner. The high-purity quartz glass tubes can also be arranged in an array, and each high-purity quartz glass tube is individually equipped with an LED ultraviolet light source.

Claims

1. A microchannel reactor for synthesizing difluorochloroethane, comprising a reactor shell and a plurality of reaction channel tubes, characterized in that: The reaction channel tube adopts a high-purity quartz glass tube, and the reactor shell is divided into one or more layers of reaction chambers. In each layer of reaction chamber, two or more high-purity quartz glass tubes symmetrically around the circumference are vertically arranged, and ultraviolet light sources are vertically arranged at the symmetry centers of the two or more high-purity quartz glass tubes. The outer sides of the two or more high-purity quartz glass tubes are bonded and connected to the steel cooling pipe by fluororubber glue and / or fluororubber hoops; a buffer chamber is arranged between the upper and lower adjacent reaction chambers, and the high-purity quartz glass tubes in the two upper and lower adjacent reaction chambers do not overlap in the vertical direction.

2. A microchannel reactor for synthesizing difluorochloroethane, comprising a reactor housing and a plurality of reaction channel tubes, characterized in that: The reaction channel tube adopts a high-purity quartz glass tube, and the reactor shell is divided into one or more layers of reaction chambers. In each layer of reaction chamber, two or more high-purity quartz glass tubes arranged in an array are vertically arranged, and an ultraviolet light source is arranged on the same side of the two or more high-purity quartz glass tubes. The other sides of the two or more high-purity quartz glass tubes are bonded and connected to a steel cooling pipe by fluororubber glue and / or fluororubber hoops; a buffer chamber is arranged between two adjacent reaction chambers, and the high-purity quartz glass tubes in the two adjacent reaction chambers do not overlap in the vertical direction.

3. A microchannel reactor for synthesizing difluorochloroethane according to claim 1 or 2, characterized in that: The ultraviolet light source is LED.

4. A microchannel reactor for synthesizing difluorochloroethane according to claim 1 or 2, characterized in that: The high-purity quartz glass tubes in the two upper and lower adjacent reaction chambers are staggered in the vertical direction.

5. A microchannel reactor for synthesizing difluorochloroethane according to claim 1 or 2, characterized in that: The outer side or the other side of the high-purity quartz glass tube is a flat surface or a curved surface fitted with a steel cooling pipe.

6. A microchannel reactor for synthesizing difluorochloroethane according to claim 1, 2 or 4, characterized in that: The steel cooling pipeline is a stainless steel cooling pipeline.

7. A microchannel reactor for synthesizing difluorochloroethane according to claim 1 or 2, characterized in that: The steel cooling pipe is filled with 5-15° C. low-ion water or pure water coolant.

8. A microchannel reactor for synthesizing difluorochloroethane according to claim 1 or 2, characterized in that: The area of ​​the outer side of the high-purity quartz glass tube is smaller than the area of ​​the bonding side of the steel cooling pipe.

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