Reaction apparatus for liquid phase continuous conversion of r113

Abstract

The application discloses a reaction device for continuous conversion of R113 liquid phase, which comprises a reaction kettle, a stirring assembly and a primary filtering assembly. The reaction kettle comprises a kettle body, a R113 feeding port, a catalyst feeding port and a crude product discharging port. The stirring assembly is connected to the kettle body and comprises a motor and a stirring paddle connected to the motor. The primary filtering assembly extends into the first reaction cavity at one end and extends out of the crude product discharging port at the other end and is connected with a crude product tank. The primary filtering assembly comprises a first skeleton and a filter screen wrapped around the first skeleton. The first skeleton has a first separation channel therein, and a plurality of first feeding holes are formed in the peripheral wall of the first skeleton and are communicated with the first separation channel. The filter screen covers the plurality of first feeding holes. The isomerization reaction converted R113a is continuously transported from the primary filtering assembly to the crude product tank, so that the conversion efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of chemical reaction apparatus, and in particular to a reaction apparatus for continuous liquid-phase conversion of R113. Background Technology

[0002] R113 is a compound regulated by the Montreal Protocol, and its diffusion in the environment is prohibited. However, R113a is an industrially valuable product that can be used to prepare various compounds. R113 is converted to R113a through catalytic isomerization reactions, and the catalysts are generally aluminum fluoride chloride or other halides.

[0003] There are several existing processes for the isomerization reaction of R113, including gas-phase continuous reaction, intermittent liquid-phase reaction, and liquid-phase continuous reaction. The gas-phase continuous reaction process has high energy consumption because it requires the reaction to be carried out in a high-temperature and high-pressure environment of 200-300℃. The intermittent liquid-phase reaction process involves mixing a certain volume of R113 liquid with a catalyst and reacting it at a temperature of 40-80℃. Continuous stirring is required within the reaction vessel. Once a certain conversion rate is achieved, the temperature is lowered to room temperature and allowed to stand for a period of time, allowing R113a and the catalyst to settle and separate. Finally, the upper clear liquid material, free of catalyst, is discharged from the reactor, while the lower R113a material and all the catalyst remain in the reactor. The next batch of material is then heated for further reaction. However, due to the continuous heating and cooling of R113, high-boiling-point byproducts solidify after cooling, coating the catalyst molecules and hindering sufficient contact between the catalyst and R113 molecules, thus reducing the catalyst's effectiveness in subsequent uses. The structure of this reaction vessel is illustrated in the utility model patent application number 202020224011.9, which discloses "A High-Efficiency and Safe Isomerization Reactor."

[0004] The liquid-phase continuous reaction process operates at a reaction temperature of 40-90℃ and a pressure range of 0.1-0.5 MPa within the reaction apparatus. It involves continuous feeding and discharging of materials simultaneously, significantly increasing the yield. The R113 / R113a ratio in the crude product is less than 0.001. Therefore, developing a reaction apparatus suitable for the liquid-phase continuous reaction process of R113 is an urgent problem to be solved. Utility Model Content

[0005] To accommodate the continuous liquid-phase reaction process of R113, this application provides a reaction apparatus for the continuous liquid-phase conversion of R113.

[0006] The reaction apparatus for continuous liquid-phase conversion of R113 provided in this application adopts the following technical solution:

[0007] A reaction apparatus for continuous liquid-phase conversion of R113, comprising:

[0008] A reaction vessel includes a vessel body, the vessel body having an R113 feed port, a catalyst feed port, and a crude product discharge port that are connected to a first reaction chamber;

[0009] A stirring assembly, connected to the vessel body, includes a motor and a stirring paddle connected to the motor; and

[0010] A primary filter assembly, one end of which extends into the first reaction chamber, and the other end extends out from the coarse product outlet and is connected to a coarse product tank.

[0011] The primary filtration assembly includes a first frame and a filter screen wrapped around the first frame. The first frame has a first separation channel, and the outer peripheral wall of the first frame has a plurality of first feed holes that communicate with the first separation channel. The filter screen covers the plurality of first feed holes.

[0012] Preferably, it further includes a secondary reactor, the secondary reactor comprising:

[0013] A sleeve, wherein the sleeve has a second reaction chamber for containing the catalyst, and one end of the sleeve is connected to a primary filter assembly; and

[0014] A secondary filtration assembly, one end of which extends into the second reaction chamber and the other end is connected to the coarse product tank.

[0015] Preferably, the secondary reactor further includes a jacket, which is disposed outside the tube sleeve and has a gap between the two to form a cavity, wherein the jacket is also provided with a heat medium inlet pipe and a heat medium outlet pipe communicating with the cavity.

[0016] Preferably, the first frame includes a filter section and a connecting section distributed in a stepped manner, and a first mounting flange is provided at one end of the connecting section, which is connected to the coarse product outlet.

[0017] Preferably, the filter screen includes a sieve section and a guide section distributed in a stepped manner. The sieve section wraps around the filter section, and the guide section circumferentially surrounds the connecting section. The guide section is also connected to a second mounting flange, which is connected between the coarse product outlet and the first mounting flange.

[0018] Preferably, the guide section has a rib extending toward one side of the connecting section, and the connecting section has a guide groove for the rib to slide axially.

[0019] Preferably, the secondary filtration assembly includes a second frame, the second frame having a second separation channel, and the outer peripheral wall of the second frame having a plurality of second feed holes communicating with the second separation channel.

[0020] Preferably, the second frame is connected to a third mounting flange, which is connected to one end of the sleeve.

[0021] Preferably, the primary filter assembly is installed vertically or horizontally within the first reaction chamber.

[0022] Preferably, the vessel body is further provided with a liquid drain port and a solid drain port that communicate with the first reaction chamber.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Through the primary filter assembly located in the first reaction chamber, R113 is continuously conveyed to the R113 feed port by the conveying pump, and R113a converted by the isomerization reaction is continuously conveyed from the primary filter assembly to the coarse product tank, thereby improving the conversion efficiency; at the same time, the filter screen in the primary filter assembly can filter large particles.

[0025] 2. By adding a secondary reactor connected to the primary filter assembly, the unconverted R113 can be further converted in the second reaction chamber of the secondary reactor and finally filtered by the secondary filter assembly before being transported to the crude product tank, thereby improving the conversion rate of R113a. In addition, a jacket is also set in the secondary reactor, and by introducing a heat medium into the jacket, the secondary conversion reaction of R113 can be carried out within a certain temperature range, thereby improving the conversion rate.

[0026] 3. By setting the first frame and the filter screen in a stepped shape, they can achieve mutual resistance and limiting in one direction. At the same time, the first mounting flange and the second mounting flange can be connected to the coarse product outlet to fix the three of them. During the fixing process, the ribs on the filter screen are stuck in the guide groove of the first frame. The two can achieve axial separation while reducing relative movement in the circumferential direction and improving installation stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the reaction device when the primary filtration assembly is installed vertically.

[0028] Figure 2 This is a schematic diagram of the reaction device when the primary filtration assembly is installed horizontally.

[0029] Figure 3 This is an exploded view of the primary filter assembly;

[0030] Figure 4 This is a cross-sectional view of the primary filter component;

[0031] Figure 5 This is a schematic diagram of the structure of a two-stage reactor.

[0032] Explanation of reference numerals in the attached drawings: 1. Reactor; 11. Reactor body; 111. First reaction chamber; 12. R113 feed port; 13. Catalyst feed port; 14. Crude product discharge port; 15. Liquid discharge port; 16. Solid discharge port; 2. Motor; 21. Agitator; 3. Primary filter assembly; 31. First frame; 311. Filter section; 3111. First separation channel; 3112. First feed hole; 312. Connecting section; 312 1. Guide groove; 313. First mounting flange; 32. Filter screen; 321. Screen section; 322. Guide section; 3221. Raised rib; 323. Second mounting flange; 4. Secondary reactor; 41. Pipe sleeve; 411. Second reaction chamber; 42. Second skeleton; 421. Second feed hole; 43. Third mounting flange; 44. Jacket; 441. Jacket cavity; 45. Heat medium inlet pipe; 46. Heat medium outlet pipe; 5. Vacuum pipe. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Figure 1 The structure of a reaction apparatus for continuous liquid-phase conversion of R113 is shown, including a reaction vessel 1 and a secondary reactor 4 connected to the reaction vessel 1. The reaction vessel 1 is used as a primary reaction vessel for continuous liquid-phase conversion of R113.

[0037] The reactor 1 includes a vessel body 11, which has a first reaction chamber 111. The vessel body 11 is provided with an R113 feeding port 12, a catalyst feeding port 13, and a crude product discharge port 14 that are connected to the first reaction chamber 111. The R113 feeding port 12 is connected to an R113 storage tank, and the R113 storage tank is fed into the first reaction chamber 111 by an R113 delivery pump. The catalyst feeding port 13 is located above the vessel body 11. In this embodiment, the crude product discharge port 14 is located above the vessel body 11. A primary filter assembly 3 is installed inside the crude product discharge port 14. The primary filter assembly 3 is installed vertically in the first reaction chamber 111, and one end of the primary filter assembly 3 extends to the lower part of the upper seal of the vessel body 11 to ensure that a portion of it is always immersed below the liquid surface in the first reaction chamber 111. The other end of the primary filter assembly 3 is connected to the secondary reactor 4 through the vacuum tube 5. The converted and filtered R113a is transported to the secondary reactor 4 for secondary conversion reaction through the system pressure difference. One end of the secondary reactor 4 is connected to the crude product tank of R113a. Of course, in order to improve the efficiency of the transport, a suction pump can be installed on the vacuum tube 5.

[0038] The reactor 1 is also equipped with a stirring assembly, which includes a motor 2 and a stirring paddle 21 connected to the motor 2. The stirring paddle 21 extends into the first reactor 1. The bottom area of ​​the reactor body 11 is also provided with a liquid outlet 15 and a solid outlet 16 that connect to the first reaction chamber 111. The solid outlet 16 can be used to discharge the catalyst, and the liquid outlet 15 can be used to discharge the remaining liquid after the reaction.

[0039] See Figure 2 In another embodiment, the crude product outlet 14 is located on one side of the vessel body 11, so that the primary filter assembly 3 is housed in the first reaction chamber 111 in a horizontal installation manner, so that the primary filter assembly 3 can be completely immersed below the liquid surface.

[0040] See also Figure 3 and Figure 4 The primary filter assembly 3 includes a split first frame 31 and a filter screen 32, with the filter screen 32 wrapped around the first frame 31. The first frame 31 includes an integral filter section 311, a connecting section 312, and a first mounting flange 313. The filter section 311, the connecting section 312, and the first mounting flange 313 are stepped. The first frame 31 has a first separation channel 3111 inside, and the filter section 311 has several first feed holes 3112 on its outer peripheral surface that communicate with the first separation channel 3111.

[0041] The filter screen 32 is a metal filter screen, including a stepped screen section 321, a guide section 322, and a second mounting flange 323. The screen section 321 has a number of filter holes, the diameter of which is smaller than the diameter of the first feed hole 3112. The guide section 322 is connected to one side of the screen section 321 by welding. At the same time, the screen section 321 is wrapped around the filter section 311, the guide section 322 is sleeved on the connecting section 312, and the second mounting flange 323 abuts against one side of the first mounting flange 313 to restrict the axial movement of the entire filter screen 32 relative to the first frame 31 to one side.

[0042] To limit the circumferential movement of the filter screen 32 relative to the first frame 31, an axially extending guide groove 3121 is provided on the outer peripheral wall of the connecting section 312. The filter screen 32 is provided with a protruding rib 3221 on the inner peripheral wall of the guide section 322. The protruding rib 3221 is formed by a pressing process. The protruding rib 3221 can be provided in the guide groove 3121 and can slide axially.

[0043] When the primary filter assembly 3 is connected to the coarse product outlet 14, the first mounting flange 313 and the second mounting flange 323 are connected to the connecting flange on the coarse product outlet 14 by fasteners. One end of the vacuum tube 5 is connected to the first mounting flange 313. In order to achieve a tight connection between the primary filter assembly 3 and the coarse product outlet 14, a sealing ring is provided between the connecting flange of the primary filter assembly 3 and the coarse product outlet 14.

[0044] See Figure 5 The secondary reactor 4 includes a sleeve 41, a jacket 44, and a secondary filter assembly. The sleeve 41 is disposed within the jacket 44, with a gap between them forming a cavity 441. A second reaction chamber 411 is located within the sleeve 41, containing a catalyst. One end of the sleeve 41 is connected to a vacuum tube 5, and the secondary filter assembly is installed at the other end of the sleeve 41. The secondary filter assembly includes a second frame 42 and a third mounting flange 43 connected to the second frame 42. The second frame 42 has a second separation channel and several second feed holes 421 communicating with the second separation channel. The second feed holes 421 communicate with the second reaction chamber 411. The third mounting flange 43 is connected to the outer wall of one end of the second frame 42 and is also connected to a connecting flange at one end of the sleeve 41.

[0045] One end of the second frame 42 extends from the second reaction chamber 411 and connects to the crude product tank of R113a via a pipe. A suction pump can also be installed on the pipe to improve the conveying efficiency. In addition, in order to improve the conversion rate of the secondary conversion reaction, the jacket 44 is also provided with a heat medium inlet pipe 45 and a heat medium outlet pipe 46, which connect to the jacket cavity 441. In this embodiment, hot water is used as the heat medium, and the temperature in the jacket cavity 441 is kept between 65-80°C.

[0046] When this reaction device is working, R113 raw material is continuously fed into the first reaction chamber 111 under the action of the delivery pump. The material conversion reaction continues. The converted R113a enters the primary filter component 3 and then enters the second reactor. The unconverted R113 is further converted in the second reactor and finally transported to the crude product tank. It should be noted that R113a can pass through both the primary filter component 3 and the secondary filter component under the action of pressure difference. The catalyst itself is granular and has a certain permeation gap.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reaction apparatus for continuous liquid-phase conversion of R113, characterized in that, include: The reactor (1) includes a vessel body (11), which has an R113 feeding port (12) connected to the first reaction chamber (111), a catalyst feeding port (13) and a crude product discharge port (14). A stirring assembly, connected to the vessel body (11), includes a motor (2) and a stirring paddle (21) connected to the motor (2); and A primary filter assembly (3) has one end extending into the first reaction chamber (111) and the other end extending out from the coarse product outlet (14) and connected to a coarse product tank. The primary filter assembly (3) includes a first frame (31) and a filter screen (32) wrapped around the first frame (31). The first frame (31) has a first separation channel (3111) inside. The outer peripheral wall of the first frame (31) is provided with a plurality of first feed holes (3112) that communicate with the first separation channel (3111). The filter screen (32) covers the plurality of first feed holes (3112).

2. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 1, characterized in that, It also includes a secondary reactor (4), which comprises: A sleeve (41) having a second reaction chamber (411) for containing a catalyst, one end of the sleeve (41) being connected to a primary filter assembly (3); and A secondary filtration assembly, one end of which extends into the second reaction chamber (411) and the other end is connected to the coarse product tank.

3. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 2, characterized in that, The secondary reactor (4) further includes a jacket (44), which is located outside the sleeve (41) and has a gap between them to form a cavity (441). The jacket (44) also has a heat medium inlet pipe (45) and a heat medium outlet pipe (46) that connect the cavity (441).

4. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 1, characterized in that, The first frame (31) includes a filter section (311) and a connecting section (312) distributed in a stepped manner. One end of the connecting section (312) is provided with a first mounting flange (313), which is connected to the coarse product outlet (14).

5. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 4, characterized in that, The filter screen (32) includes a stepped sieve section (321) and a guide section (322). The sieve section (321) wraps around the filter section (311), and the guide section (322) surrounds the connecting section (312). The guide section (322) is also connected to a second mounting flange (323), which is connected between the crude product outlet (14) and the first mounting flange (313).

6. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 5, characterized in that, The guide section (322) has a rib (3221) extending toward the side of the connecting section (312), and the connecting section (312) has a guide groove (3121) for the rib (3221) to slide axially.

7. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 2, characterized in that, The secondary filter assembly includes a second frame (42), which has a second separation channel inside. The outer peripheral wall of the second frame (42) is provided with a plurality of second feed holes (421) that communicate with the second separation channel.

8. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 7, characterized in that, The second frame (42) is connected to a third mounting flange (43), which is connected to one end of the sleeve (41).

9. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 1, characterized in that, The primary filter assembly (3) is installed in the first reaction chamber (111) in either a vertical or horizontal direction.

10. The reaction apparatus for continuous liquid-phase conversion of R113 according to claim 1, characterized in that, The vessel body (11) is also provided with a liquid outlet (15) and a solid outlet (16) that connect to the first reaction chamber (111).

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