Continuous production equipment and process for trifluorotoluene

Abstract

The invention provides trifluorotoluene continuous production equipment and process, and relates to the technical field of organic chemical engineering, the trifluorotoluene continuous production equipment comprises a first mixing mechanism, the first mixing mechanism comprises a first mixing cylinder, the top of the first mixing cylinder is fixedly provided with a first sealing cover, and the bottom of the first sealing cover is fixedly provided with a hollow telescopic rod; the bottom of the hollow telescopic rod is fixedly provided with a heating disc, the center of the heating disc is fixedly provided with a U-shaped valve, the top of the heating disc is fixedly provided with a plurality of first heating rods, the bottom of the hollow telescopic rod is fixedly provided with a first gas conveying pipeline, and the first gas conveying pipeline is connected with an external gas conveying pump. The situation that the pipeline is blocked by sediments and the production smoothness is influenced can be avoided, and continuous production of trifluorotoluene is facilitated; the sealing device has good sealing performance, enough pressure can be kept in the machining process of materials, and the production efficiency of trifluorotoluene is improved.

Description

Technical Field

[0001] The invention relates to the technical field of organic chemical industry, and in particular to a continuous production device and process of trifluorotoluene. Background Art

[0002] Trifluorotoluene is mainly used in organic synthesis and as an intermediate for dyes and drugs, as a vulcanizing agent and accelerator, and in the manufacture of insulating oil.

[0003] The production process of trifluorotoluene requires a certain pressure for the reaction to proceed. Existing production equipment is difficult to ensure the sealing of the equipment, which affects the production efficiency of trifluorotoluene. At the same time, the precipitate in the production process is easy to adhere to the transmission pipeline, making continuous production difficult.

[0004] Based on this, the present invention provides a trifluorotoluene continuous production device. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a trifluorotoluene continuous production device, comprising a first mixing mechanism, the first mixing mechanism comprising a first mixing barrel, a first liquid discharge port is fixedly installed at the bottom of the first mixing barrel, a second mixing mechanism is fixedly installed at the other end of the first liquid discharge port, the second mixing mechanism comprises a second mixing barrel, a discharge port is fixedly installed at the bottom of the second mixing barrel, a distillation barrel is fixedly installed at the other end of the discharge port, a first sealing cover is fixedly installed at the top of the first mixing barrel, a hollow telescopic rod is fixedly installed at the bottom of the first sealing cover, a heating plate is fixedly installed at the bottom of the hollow telescopic rod, a U-shaped valve is fixedly installed at the center of the heating plate, a plurality of first heating rods are fixedly installed on the top of the heating plate, a first gas pipeline is fixedly installed at the bottom of the hollow telescopic rod, the first gas pipeline is connected to an external gas pump, a first transmission wire is fixedly installed in the hollow telescopic rod, one end of the first transmission wire is fixedly connected to the first heating rod, and the other end of the first transmission wire is connected to an external control system.

[0006] Furthermore, a sealing bottom ring is fixedly installed inside the first mixing cylinder, a mixing filter is fixedly installed on the inner ring of the sealing bottom ring, a first adjusting bottom plate is longitudinally slidably installed on the bottom of the first mixing cylinder, and the first adjusting bottom plate is in contact with the bottom of the mixing filter.

[0007] Furthermore, a second sealing cover is fixedly installed on the top of the second mixing cylinder, a stirring tube is longitudinally rotatably installed at the center of the second sealing cover, a plurality of gas delivery holes are fixedly installed on the bottom of the stirring tube, a second gas delivery pipeline is fixedly installed in the stirring tube, the top of the second gas delivery pipeline is connected to an external air pump, the second gas delivery pipeline is communicated with the gas delivery holes, a certain gap is left between the outer wall of the second gas delivery pipeline and the inner wall of the stirring tube, a waste discharge hole is provided in the middle part of the stirring tube, the waste discharge hole is communicated with the gap between the inner wall of the stirring tube and the outer wall of the second gas delivery pipeline, an adjusting exhaust pipe is longitudinally slidably installed on the inner wall of the stirring tube, the adjusting exhaust pipe is in contact with the waste discharge hole, a gap for ventilation is left between the inner wall of the adjusting exhaust pipe and the outer wall of the second gas delivery pipeline, a second adjusting telescopic rod is fixedly installed on the top of the second sealing cover, and the second adjusting telescopic rod is fixedly connected to the adjusting exhaust pipe.

[0008] Further, the distillation cylinder includes a distillation outer cylinder, a distillation inner cylinder is fixedly installed in the distillation outer cylinder, a feed pipe is fixedly installed on the top of the distillation inner cylinder, a drainage trough is provided between the distillation inner cylinder and the distillation outer cylinder, a distillation filter screen is fixedly installed on the bottom of the distillation inner cylinder, a second adjustment bottom plate is longitudinally slidably installed on the bottom of the distillation inner cylinder, the second adjustment bottom plate is in contact with and cooperates with the bottom of the distillation filter screen, a heating plate is fixedly installed on the top of the second adjustment bottom plate, a second transmission wire is fixedly installed on the bottom of the second adjustment bottom plate, one end of the second transmission wire is connected to the heating plate, and the other end of the second transmission wire is connected to an external control system.

[0009] Furthermore, an air filter bin is fixedly installed on the top of the first sealing cover, an arc-shaped exhaust groove is provided at the bottom of the air filter bin, an arc-shaped sealing plate is longitudinally slidably installed in the arc-shaped exhaust groove at the bottom of the air filter bin, an activated carbon filter layer is fixedly installed in the air filter bin, an exhaust port is fixedly installed on the top of the air filter bin, a first adjustable telescopic rod is fixedly installed at the bottom of the air filter bin, and the first adjustable telescopic rod is fixedly connected to the arc-shaped sealing plate.

[0010] Furthermore, a sealed telescopic rod is longitudinally rotatably installed on the top of the first mixing cylinder, and gear patterns are provided on the inner and outer rings of the sealed telescopic rod. A plurality of transmission rings are longitudinally rotatably installed on the top of the first mixing cylinder, and gears are fixedly installed on the bottom of the transmission rings. The gears at the bottom of the transmission rings mesh with the gear patterns on the inner ring of the sealed telescopic rod. The transmission rings cooperate with the first sealing cover screw. A first driving motor is fixedly installed on the outer wall of the first mixing cylinder, and gears are fixedly installed on the first driving motor. The gears on the first driving motor mesh with the gears on the outer ring of the sealed telescopic rod.

[0011] Furthermore, a transmission gear is fixedly installed on the top of the stirring tube, a third drive motor is fixedly installed on the top of the second sealing cover, a gear is fixedly installed on the third drive motor, the gear on the third drive motor is meshed with the transmission gear, and a plurality of feed pipes are fixedly installed on the top of the stirring tube.

[0012] Furthermore, a third sealing cover is fixedly installed on the top of the distillation outer cylinder, a conical groove is provided at the bottom of the third sealing cover, a waste liquid discharge port and a finished product discharge port are fixedly installed at the bottom of the distillation outer cylinder, the waste liquid discharge port is connected to the drainage groove between the distillation outer cylinder and the distillation inner cylinder, and the finished product discharge port is connected to the inside of the distillation outer cylinder.

[0013] Furthermore, a second adjusting gear is longitudinally rotatably installed at the bottom of the distillation outer barrel, a screw is fixedly installed on the top of the second adjusting gear, the screw on the top of the second adjusting gear cooperates with the second adjusting bottom plate screw, and a fourth driving motor is fixedly installed at the bottom of the distillation outer barrel, a gear is fixedly installed on the fourth driving motor, and the gear on the fourth driving motor is meshed with the second adjusting gear.

[0014] Furthermore, a first adjusting gear is longitudinally rotatably installed at the bottom of the first mixing drum, a second driving motor is fixedly installed at the bottom of the first mixing drum, a gear is fixedly installed on the second driving motor, the gear on the second driving motor is meshed with the first adjusting gear, a screw is fixedly installed on the top of the first adjusting gear, and the screw on the first adjusting gear cooperates with the first adjusting base plate screw.

[0015] Furthermore, a first fluid valve is fixedly installed on the first liquid discharge port, a second fluid valve is fixedly installed on the feed pipe, a discharge port is fixedly installed on the bottom of the second mixing cylinder, the discharge port is fixedly connected to the feed pipe, a second heating rod is fixedly installed on the inner wall of the second mixing cylinder, and the second heating rod is connected to the control system through a wire.

[0016] A continuous production process of trifluorotoluene, using the above production equipment, specifically comprises the following steps: S1: Chlorine gas and toluene are sequentially placed in the first mixing barrel as catalysts, and the mixture is heated to 60° C. by controlling the arc sealing plate through an external control system, and the catalytic gas is delivered to the first mixing barrel through an external gas delivery pump, and the pressure in the first mixing barrel is increased to 2 Mpa; S2: Starting the second driving motor to drive the first adjusting gear to rotate, driving the first adjusting bottom plate to slide downward in the first mixing barrel, so that the mixed liquid is filtered through the mixing filter and then flows into the first liquid discharge port; S3: Open the first fluid valve through the external control system, introduce the nitrated mixture into the second mixing barrel through the first liquid discharge port, add a catalyst into the second mixing barrel through the feed pipe, and input hydrogen fluoride into the second mixing barrel through the air pump connected to the second gas pipeline, heat the mixture to 60°C through the second heating rod, increase the pressure in the second mixing barrel to 2Mpa, and start the third drive motor to drive the stirring tube to rotate to stir and mix the mixture, and perform a fluorination reaction; S4: starting the second fluid valve through the control system to open the feed pipe, and introducing the mixture after the fluorination reaction into the distillation inner cylinder through the feed pipe; S5: starting the feed pipe through the control system to heat the mixture and perform distillation on the mixture; S6: The waste liquid from the distillation is collected through the drainage groove between the distillation outer cylinder and the distillation inner cylinder, and discharged through the waste liquid discharge port. After the distillation is completed, the fourth drive motor is started to drive the second adjustment bottom plate to slide downward in the distillation inner cylinder. The distilled trifluorotoluene is filtered through the distillation filter net and then discharged through the finished product discharge port.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The present invention collects and adsorbs the precipitate in the mixture by means of a heating plate, thereby preventing the precipitate from clogging the pipeline and affecting the smoothness of production, thereby facilitating the continuous production of trifluorotoluene; (2) The present invention has good sealing properties, thereby enabling the material to maintain sufficient pressure during the processing, thereby improving the production efficiency of trifluorotoluene; (3) The present invention can fully stir the mixture during the process of adding the catalytic gas by means of a stirring tube, thereby improving the processing efficiency of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the top structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the front structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the partial cutaway structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the half-section structure of the stirring tube of the present invention.

[0023] Figure 6 It is a schematic diagram of the half-section structure of the hollow telescopic rod of the present invention.

[0024] Figure 7 It is a schematic diagram of the half-section structure of the first mixing mechanism of the present invention.

[0025] Figure 8 It is a schematic diagram of the half-section structure of the distillation cylinder of the present invention.

[0026] Fig. 9 It is a schematic diagram of the half-section structure of the first sealing cover of the present invention.

[0027] Figure numerals: 1-first mixing mechanism; 2-second mixing mechanism; 3-rectifying cylinder; 101-first sealing cover; 102-gas filter bin; 103-first mixing cylinder; 104-activated carbon filter layer; 105-arc sealing plate; 106-transmission ring; 107-sealed telescopic rod; 108-hollow telescopic rod; 109-sealed bottom ring; 110-mixing filter; 111-first fluid valve; 112-first regulating bottom plate; 113-first regulating gear; 114-heating plate; 115-first heating rod; 116-U-shaped valve; 117-first transmission wire; 118-first gas pipeline; 119-first drive motor; 120-second drive motor; 121-first liquid discharge port; 122-exhaust port; 123-first regulating telescopic rod ;201-second sealing cover;202-third driving motor;203-second mixing barrel;204-stirring tube;205-second adjusting telescopic rod;206-transmission gear;207-adjusting exhaust pipe;208-waste discharge hole;209-second gas pipeline;210-gas hole;211-feeding pipeline;212-discharge port;213-second heating rod;301-third sealing cover;302-distillation outer barrel;303-waste liquid discharge port;304-finished product discharge port;305-distillation inner barrel;306-second fluid valve;307-distillation filter;308-second adjusting bottom plate;309-second adjusting gear;310-fourth driving motor;311-second transmission wire;312-feeding pipe;313-heating plate. DETAILED DESCRIPTION

[0028] The technical solution provided by the present invention is further described below in conjunction with the accompanying drawings and according to specific implementation methods.

[0029] like Figures 1 to 9As shown, a trifluorotoluene continuous production device comprises a first mixing mechanism 1, the first mixing mechanism 1 comprises a first mixing cylinder 103, a first liquid discharge port 121 is fixedly installed at the bottom of the first mixing cylinder 103, a first fluid valve 111 is fixedly installed on the first liquid discharge port 121, a first sealing cover 101 is fixedly installed on the top of the first mixing cylinder 103, a hollow telescopic rod 108 is fixedly installed at the bottom of the first sealing cover 101, a first gas pipeline 118 is fixedly installed at the bottom of the hollow telescopic rod 108, the first gas pipeline 118 is connected to an external gas pump, and the bottom of the hollow telescopic rod 108 is fixedly installed. A heating plate 114 is installed, and a U-shaped valve 116 is fixedly installed at the center of the heating plate 114. The U-shaped valve 116 is used to prevent the mixed solution from flowing back. A plurality of first heating rods 115 are fixedly installed on the top of the heating plate 114, which are used to heat the heating plate 114 and the mixed solution. At the same time, the precipitate in the chlorination reaction process is collected through the heating plate 114 to prevent the precipitate from clogging the transmission pipeline. A first transmission conductor 117 is fixedly installed in the hollow telescopic rod 108, and one end of the first transmission conductor 117 is fixedly connected to the first heating rod 115, and the other end of the first transmission conductor 117 is connected to an external control system.

[0030] like Figures 1 to 9 As shown, a sealing bottom ring 109 is fixedly installed inside the first mixing cylinder 103, and a mixing filter screen 110 is fixedly installed on the inner ring of the sealing bottom ring 109. A first adjusting bottom plate 112 is longitudinally slidably installed on the bottom of the first mixing cylinder 103. The first adjusting bottom plate 112 is in contact with and cooperates with the bottom of the mixing filter screen 110. The mixing filter screen 110 is used to filter the mixed liquid, and the first adjusting bottom plate 112 is used to cooperate with the sealing bottom ring 109 to increase the sealing performance of the equipment.

[0031] like Figures 1 to 9 As shown, a first adjusting gear 113 is longitudinally rotatably installed at the bottom of the first mixing drum 103, a second driving motor 120 is fixedly installed at the bottom of the first mixing drum 103, a gear is fixedly installed on the second driving motor 120, the gear on the second driving motor 120 is meshed with the first adjusting gear 113, a screw is fixedly installed on the top of the first adjusting gear 113, and the screw on the first adjusting gear 113 cooperates with the lead screw of the first adjusting base plate 112.

[0032] like Figures 1 to 9As shown, a gas filter bin 102 is fixedly installed on the top of the first sealing cover 101, and an arc-shaped exhaust groove is provided at the bottom of the gas filter bin 102 for discharging residual gas after the chlorination reaction. An arc-shaped sealing plate 105 is longitudinally slidably installed in the arc-shaped exhaust groove at the bottom of the gas filter bin 102, and the arc-shaped sealing plate 105 is an I-shaped arc-shaped plate. The arc-shaped sealing plate 105 is used to control the switch of the exhaust groove. An activated carbon filter layer 104 is fixedly installed in the gas filter bin 102, and the activated carbon filter layer 104 is used to filter the exhaust gas. An exhaust port 122 is fixedly installed on the top of the air filter bin 102 for discharging filtered gas. A first adjustable telescopic rod 123 is fixedly installed on the bottom of the air filter bin 102. The first adjustable telescopic rod 123 is fixedly connected to the arc-shaped sealing plate 105 and is used to control the sliding of the arc-shaped sealing plate 105 in the exhaust groove. When the baffles at both ends of the arc-shaped sealing plate 105 are not in contact with the exhaust groove, the exhaust gas is discharged through the gap between the exhaust groove and the arc-shaped sealing plate 105, and is discharged after being filtered through the activated carbon filter layer 104.

[0033] like Figures 1 to 9 As shown, a sealed telescopic rod 107 is longitudinally rotatably installed on the top of the first mixing cylinder 103, and gear patterns are provided on the inner and outer rings of the sealed telescopic rod 107. A plurality of transmission rings 106 are longitudinally rotatably installed on the top of the first mixing cylinder 103, and a gear is fixedly installed at the bottom of the transmission ring 106. The gear at the bottom of the transmission ring 106 meshes with the gear pattern of the inner ring of the sealed telescopic rod 107. The transmission ring 106 cooperates with the screw rod of the first sealing cover 101. A first driving motor 119 is fixedly installed on the outer wall of the first mixing cylinder 103, and a gear is fixedly installed on the first driving motor 119. The gear on the first driving motor 119 meshes with the gear on the outer ring of the sealed telescopic rod 107. The sealed telescopic rod 107 is driven to rotate by starting the first driving motor 119, and the transmission ring 106 is driven to rotate by the rotation of the sealed telescopic rod 107. The rotation of the transmission ring 106 drives the first sealing cover 101 to slide on the top of the first mixing cylinder 103 to control the opening and closing of the first sealing cover 101.

[0034] like Figures 1 to 9As shown, a second mixing mechanism 2 is fixedly installed at the other end of the first liquid discharge port 121, and the second mixing mechanism 2 includes a second mixing cylinder 203, a second sealing cover 201 is fixedly installed on the top of the second mixing cylinder 203, a stirring tube 204 is longitudinally rotatably installed at the center of the second sealing cover 201, a plurality of gas delivery holes 210 are fixedly installed at the bottom of the stirring tube 204, a second gas delivery pipeline 209 is fixedly installed in the stirring tube 204, the top of the second gas delivery pipeline 209 is connected to an external air pump, the second gas delivery pipeline 209 is communicated with the gas delivery holes 210, a certain gap is left between the outer wall of the second gas delivery pipeline 209 and the inner wall of the stirring tube 204, and a waste discharge hole 208 is provided in the middle part of the stirring tube 204 for discharging the second gas delivery pipeline 209. The reaction gas in the second mixing cylinder 203 is connected to the gap between the inner wall of the stirring tube 204 and the outer wall of the second gas pipeline 209 through the waste discharge hole 208. The inner wall of the stirring tube 204 is longitudinally slidably installed with an adjusting exhaust pipe 207. The adjusting exhaust pipe 207 is in contact with the waste discharge hole 208 to control the opening and closing of the waste discharge hole 208 and improve the sealing performance. A gap for ventilation is left between the inner wall of the adjusting exhaust pipe 207 and the outer wall of the second gas pipeline 209. A second adjusting telescopic rod 205 is fixedly installed on the top of the second sealing cover 201. The second adjusting telescopic rod 205 is fixedly connected to the adjusting exhaust pipe 207 to control the sliding of the adjusting exhaust pipe 207 in the stirring tube 204.

[0035] like Figures 1 to 9 As shown, a transmission gear 206 is fixedly installed on the top of the stirring tube 204, and a third driving motor 202 is fixedly installed on the top of the second sealing cover 201. A gear is fixedly installed on the third driving motor 202. The gear on the third driving motor 202 is meshed with the transmission gear 206. The stirring tube 204 is driven to rotate by starting the third driving motor 202, so as to stir and mix the mixture in the second mixing drum 203 during the process of conveying the catalytic gas into the second mixing drum 203, thereby improving the processing efficiency.

[0036] like Figures 1 to 9 As shown, a plurality of feed pipes 211 are fixedly installed on the top of the stirring tube 204, which are connected to an external infusion pump for adding catalyst into the second mixing barrel 203. A second heating rod 213 is fixedly installed on the inner wall of the second mixing barrel 203. The second heating rod 213 is connected to the control system through a wire for heating the mixture.

[0037] like Figures 1 to 9As shown, a discharge port 212 is fixedly installed at the bottom of the second mixing cylinder 203, and a distillation cylinder 3 is fixedly installed at the other end of the discharge port 212. The distillation cylinder 3 includes a distillation outer cylinder 302, a distillation inner cylinder 305 is fixedly installed in the distillation outer cylinder 302, a feed pipe 312 is fixedly installed on the top of the distillation inner cylinder 305, a second fluid valve 306 is fixedly installed on the feed pipe 312, the feed pipe 312 is fixedly connected to the discharge port 212, and a drainage trough is provided between the distillation inner cylinder 305 and the distillation outer cylinder 302 for collecting and discharging waste liquid distilled out.

[0038] like Figures 1 to 9 As shown, a distillation filter screen 307 is fixedly installed at the bottom of the distillation inner cylinder 305, and a second adjusting bottom plate 308 is longitudinally slidably installed at the bottom of the distillation inner cylinder 305. The second adjusting bottom plate 308 is in contact with and cooperates with the bottom of the distillation filter screen 307 to increase the sealing performance of the equipment. A heating plate 313 is fixedly installed on the top of the second adjusting bottom plate 308, and a second transmission wire 311 is fixedly installed at the bottom of the second adjusting bottom plate 308. One end of the second transmission wire 311 is connected to the heating plate 313, and the other end of the second transmission wire 311 is connected to the external control system.

[0039] like Figures 1 to 9 As shown, a third sealing cover 301 is fixedly installed on the top of the distillation outer cylinder 302, a conical groove is provided at the bottom of the third sealing cover 301, a waste liquid discharge port 303 and a finished product discharge port 304 are fixedly installed at the bottom of the distillation outer cylinder 302, the waste liquid discharge port 303 is connected to the drainage groove between the distillation outer cylinder 302 and the distillation inner cylinder 305, and the finished product discharge port 304 is connected to the inside of the distillation outer cylinder 302.

[0040] like Figures 1 to 9 As shown, a second adjusting gear 309 is longitudinally rotatably installed at the bottom of the distillation outer cylinder 302, a screw is fixedly installed on the top of the second adjusting gear 309, the screw on the top of the second adjusting gear 309 cooperates with the lead screw of the second adjusting bottom plate 308, and a fourth driving motor 310 is fixedly installed at the bottom of the distillation outer cylinder 302, a gear is fixedly installed on the fourth driving motor 310, the gear on the fourth driving motor 310 is meshed with the second adjusting gear 309, and is used to control the waste discharge hole 208 to slide in the distillation inner cylinder 305, so as to control the discharge of trifluorotoluene distilled out.

[0041] like Figures 1 to 9 As shown, a continuous production process of trifluorotoluene, using the above-mentioned preparation equipment, specifically comprises the following steps: S1: Chlorine and toluene are sequentially placed in the first mixing barrel 103 as catalysts, and the mixture is heated to 60° C. by controlling the arc-shaped sealing plate 105 through an external control system. At the same time, the catalytic gas is delivered to the first mixing barrel 103 through an external gas delivery pump, and the pressure in the first mixing barrel 103 is increased to 2 MPa; S2: Start the second driving motor 120 to drive the first adjusting gear 113 to rotate, and drive the first adjusting bottom plate 112 to slide downward in the first mixing cylinder 103, so that the mixed liquid is filtered through the mixing filter 110 and flows into the first liquid discharge port 121; S3: The first fluid valve 111 is opened through an external control system, and the mixture after nitration is introduced into the second mixing barrel 203 through the first liquid discharge port 121. At the same time, a catalyst is added into the second mixing barrel 203 through the feed pipe 211, and hydrogen fluoride is input into the second mixing barrel 203 through an air pump connected to the second gas pipeline 209. The mixture is heated to 60° C. through the second heating rod 213, and the pressure in the second mixing barrel 203 is increased to 2 MPa. The third driving motor 202 is started to drive the stirring tube 204 to rotate to stir and mix the mixture, and a fluorination reaction is performed; S4: start the second fluid valve 306 through the control system to open the feed pipe 312, and introduce the mixture after the fluorination reaction into the distillation inner cylinder 305 through the feed pipe 312; S5: starting the feed pipe 312 through the control system to heat the mixture and perform distillation on the mixture; S6: The waste liquid from the distillation is collected through the drainage groove between the distillation outer cylinder 302 and the distillation inner cylinder 305, and discharged through the waste liquid discharge port 303. After the distillation is completed, the fourth drive motor 310 is started to drive the second adjustment bottom plate 308 to slide downward in the distillation inner cylinder 305. The distilled trifluorotoluene is filtered through the distillation filter screen 307 and then discharged through the finished product discharge port 304.

Claims

1. A trifluorotoluene continuous production device, comprising a first mixing mechanism (1), the first mixing mechanism (1) comprising a first mixing cylinder (103), a first liquid discharge port (121) being fixedly mounted on the bottom of the first mixing cylinder (103), a second mixing mechanism (2) being fixedly mounted on the other end of the first liquid discharge port (121), the second mixing mechanism (2) comprising a second mixing cylinder (203), a discharge port (212) being fixedly mounted on the bottom of the second mixing cylinder (203), a rectification cylinder (3) being fixedly mounted on the other end of the discharge port (212), characterized in that: A first sealing cover (101) is fixedly mounted on the top of the first mixing cylinder (103); a hollow telescopic rod (108) is fixedly mounted on the bottom of the first sealing cover (101); a heating plate (114) is fixedly mounted on the bottom of the hollow telescopic rod (108); a U-shaped valve (116) is fixedly mounted in the center of the heating plate (114); a plurality of first heating rods (115) are fixedly mounted on the top of the heating plate (114); a first gas delivery pipeline (118) is fixedly mounted on the bottom of the hollow telescopic rod (108); the first gas delivery pipeline (118) is connected to an external gas delivery pump; and the hollow telescopic rod (108) is fixedly mounted on the bottom of the heating plate (114). A first transmission wire (117) is fixedly installed inside the retractable rod (108), one end of the first transmission wire (117) is fixedly connected to the first heating rod (115), and the other end of the first transmission wire (117) is connected to an external control system; a sealing bottom ring (109) is fixedly installed inside the first mixing cylinder (103), a mixing filter (110) is fixedly installed on the inner ring of the sealing bottom ring (109), a first adjustment bottom plate (112) is longitudinally slidably installed on the bottom of the first mixing cylinder (103), and the first adjustment bottom plate (112) is in contact with and matched with the bottom of the mixing filter (110); A second sealing cover (201) is fixedly mounted on the top of the second mixing cylinder (203); a stirring tube (204) is longitudinally rotatably mounted at the center of the second sealing cover (201); a plurality of gas delivery holes (210) are fixedly mounted on the bottom of the stirring tube (204); a second gas delivery pipeline (209) is fixedly mounted inside the stirring tube (204); the top of the second gas delivery pipeline (209) is connected to an external air pump; the second gas delivery pipeline (209) is in communication with the gas delivery holes (210); a certain gap is left between the outer wall of the second gas delivery pipeline (209) and the inner wall of the stirring tube (204); and a central portion of the stirring tube (204) is provided with a A waste discharge hole (208) is connected to the gap between the inner wall of the stirring tube (204) and the outer wall of the second gas pipeline (209); an adjustable exhaust pipe (207) is longitudinally slidably mounted on the inner wall of the stirring tube (204); the adjustable exhaust pipe (207) is in contact with the waste discharge hole (208); a gap for ventilation is left between the inner wall of the adjustable exhaust pipe (207) and the outer wall of the second gas pipeline (209); a second adjustable telescopic rod (205) is fixedly mounted on the top of the second sealing cover (201); and the second adjustable telescopic rod (205) is fixedly connected to the adjustable exhaust pipe (207).

2. A trifluorotoluene continuous production equipment according to claim 1, characterized in that: The distillation cylinder (3) comprises a distillation outer cylinder (302), a distillation inner cylinder (305) is fixedly installed inside the distillation outer cylinder (302), a material conveying pipe (312) is fixedly installed on the top of the distillation inner cylinder (305), a liquid drainage groove is provided between the distillation inner cylinder (305) and the distillation outer cylinder (302), a distillation filter screen (307) is fixedly installed on the bottom of the distillation inner cylinder (305), a second adjustment bottom plate (308) is longitudinally slidably installed on the bottom of the distillation inner cylinder (305), the second adjustment bottom plate (308) is in contact with the bottom of the distillation filter screen (307), a heating plate (313) is fixedly installed on the top of the second adjustment bottom plate (308), a second transmission wire (311) is fixedly installed on the bottom of the second adjustment bottom plate (308), one end of the second transmission wire (311) is connected to the heating plate (313), and the other end of the second transmission wire (311) is connected to an external control system.

3. A trifluorotoluene continuous production equipment according to claim 1, characterized in that: An air filter bin (102) is fixedly mounted on the top of the first sealing cover (101); an arc-shaped exhaust groove is provided at the bottom of the air filter bin (102); an arc-shaped sealing plate (105) is longitudinally slidably mounted in the arc-shaped exhaust groove at the bottom of the air filter bin (102); an activated carbon filter layer (104) is fixedly mounted in the air filter bin (102); an exhaust port (122) is fixedly mounted on the top of the air filter bin (102); a first adjustable telescopic rod (123) is fixedly mounted on the bottom of the air filter bin (102); and the first adjustable telescopic rod (123) is fixedly connected to the arc-shaped sealing plate (105).

4. A trifluorotoluene continuous production equipment according to claim 1, characterized in that: A sealing telescopic rod (107) is longitudinally rotatably mounted on the top of the first mixing barrel (103), and gear patterns are provided on the inner and outer rings of the sealing telescopic rod (107). A plurality of transmission rings (106) are longitudinally rotatably mounted on the top of the first mixing barrel (103), and gears are fixedly mounted on the bottom of the transmission rings (106), and the gears on the bottom of the transmission rings (106) mesh with the gear patterns on the inner ring of the sealing telescopic rod (107). The transmission rings (106) cooperate with the screw rod of the first sealing cover (101). A first driving motor (119) is fixedly mounted on the outer wall of the first mixing barrel (103), and gears are fixedly mounted on the first driving motor (119), and the gears on the first driving motor (119) mesh with the gears on the outer ring of the sealing telescopic rod (107).

5. The continuous production equipment of trifluorotoluene according to claim 1, characterized in that: A transmission gear (206) is fixedly mounted on the top of the stirring tube (204); a third drive motor (202) is fixedly mounted on the top of the second sealing cover (201); a gear is fixedly mounted on the third drive motor (202); the gear on the third drive motor (202) is meshed with the transmission gear (206); and a plurality of feed pipes (211) are fixedly mounted on the top of the stirring tube (204).

6. A trifluorotoluene continuous production equipment according to claim 2, characterized in that: A third sealing cover (301) is fixedly mounted on the top of the rectification outer cylinder (302); a conical groove is provided on the bottom of the third sealing cover (301); a waste liquid discharge port (303) and a finished product discharge port (304) are fixedly mounted on the bottom of the rectification outer cylinder (302); the waste liquid discharge port (303) is connected to a liquid discharge groove between the rectification outer cylinder (302) and the rectification inner cylinder (305); and the finished product discharge port (304) is connected to the inside of the rectification outer cylinder (302).

7. A trifluorotoluene continuous production equipment according to claim 3, characterized in that: A second adjusting gear (309) is longitudinally rotatably mounted on the bottom of the rectification outer cylinder (302), a screw is fixedly mounted on the top of the second adjusting gear (309), the screw on the top of the second adjusting gear (309) cooperates with the screw of the second adjusting bottom plate (308), a fourth driving motor (310) is fixedly mounted on the bottom of the rectification outer cylinder (302), a gear is fixedly mounted on the fourth driving motor (310), and the gear on the fourth driving motor (310) meshes with the second adjusting gear (309).

8. The continuous production equipment of trifluorotoluene according to claim 1, characterized in that: A first adjusting gear (113) is longitudinally rotatably mounted on the bottom of the first mixing barrel (103); a second driving motor (120) is fixedly mounted on the bottom of the first mixing barrel (103); a gear is fixedly mounted on the second driving motor (120); the gear on the second driving motor (120) meshes with the first adjusting gear (113); a screw is fixedly mounted on the top of the first adjusting gear (113); the screw on the first adjusting gear (113) cooperates with a screw of the first adjusting bottom plate (112).

9. The continuous production equipment of trifluorotoluene according to claim 1, characterized in that: A first fluid valve (111) is fixedly mounted on the first liquid discharge port (121), a second fluid valve (306) is fixedly mounted on the material delivery pipe (312), a discharge port (212) is fixedly mounted on the bottom of the second mixing barrel (203), the discharge port (212) is fixedly connected to the material delivery pipe (312), a second heating rod (213) is fixedly mounted on the inner wall of the second mixing barrel (203), and the second heating rod (213) is connected to a control system via a wire.

10. A continuous production process of trifluorotoluene, characterized in that: Using the production equipment described in claim 1, the specific steps include: S1: Chlorine gas and toluene are sequentially placed in a first mixing barrel (103) as catalysts, and the mixture is heated to 60° C. by controlling the arc-shaped sealing plate (105) through an external control system. At the same time, a catalytic gas is delivered to the first mixing barrel (103) through an external gas delivery pump, and the pressure in the first mixing barrel (103) is increased to 2 MPa; S2: starting the second driving motor (120) to drive the first adjusting gear (113) to rotate, thereby driving the first adjusting bottom plate (112) to slide downward in the first mixing cylinder (103), so that the mixed liquid passes through the mixing filter (110) and flows into the first liquid discharge port (121); S3: opening the first fluid valve (111) through an external control system, introducing the nitrated mixture into the second mixing barrel (203) through the first liquid discharge port (121), adding a catalyst into the second mixing barrel (203) through the feed pipe (211), and inputting hydrogen fluoride into the second mixing barrel (203) through an air pump connected to the second gas pipeline (209), heating the mixture to 60° C. through a second heating rod (213), increasing the pressure in the second mixing barrel (203) to 2 MPa, and starting the third drive motor (202) to drive the stirring tube (204) to rotate to stir and mix the mixture, thereby performing a fluorination reaction; S4: starting the second fluid valve (306) through the control system to open the feed pipe (312), and introducing the mixture after the fluorination reaction into the distillation inner cylinder (305) through the feed pipe (312); S5: starting the feed pipe (312) through the control system to heat the mixture and perform distillation on the mixture; S6: The waste liquid produced by distillation is collected through the drainage groove between the distillation outer cylinder (302) and the distillation inner cylinder (305), and discharged through the waste liquid discharge port (303). After the distillation is completed, the fourth drive motor (310) is started to drive the second adjustment bottom plate (308) to slide downward in the distillation inner cylinder (305). The distilled trifluorotoluene is filtered through the distillation filter screen (307) and discharged through the finished product discharge port (304).

Images