Continuous HFPO polycondensation synthesis system with controllable conversion rate

Abstract

The utility model provides a conversion rate controllable continuous HFPO polycondensation synthesis system, which comprises a reaction kettle, a feed pipe fixedly mounted at the center point of the bottom of the reaction kettle, a water inlet pipe fixedly mounted on one side of the outer part of the reaction kettle, a water outlet pipe fixedly mounted on one side of the outer part of the reaction kettle and positioned above the water inlet pipe, and a water outlet pipe fixedly mounted on the other side of the outer part of the reaction kettle, a water tank is formed in the inner wall of the reaction kettle. According to the continuous HFPO polycondensation synthesis system with the controllable conversion rate, a raw material HFPO and a saturated solvent dissolved with a catalyst are continuously fed through the feeding pipe, cold water is introduced into the water inlet pipe, the cold water enters the water tank, and after the water tank is filled with water, the water is discharged from the water outlet pipe, so that the temperature in the reaction kettle is effectively and continuously reduced, and the yield of the reaction kettle is improved. Under the action of stirring and catalysis, HFPO is subjected to condensation polymerization, a plurality of liquid phase discharge pipes are uniformly arranged along the vertical line of the reaction kettle, and different liquid phase discharge pipes are selected for discharge according to different retention time, corresponding to different reaction conversion rates.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fine chemical industry especially relates to a continuous HFPO polycondensation synthesis system with controllable conversion rate. BACKGROUND

[0002] In the field of fine chemical industry, the structure type of the reaction kettle often determines the efficiency of the process system, and the structure type of the reaction kettle affects the residence time distribution of the material, the mass transfer and heat transfer performance, and ultimately plays a decisive role in the conversion rate and selectivity of the reaction.

[0003] The reaction of hexafluoropropylene oxide (HFPO) polycondensation synthesis of HFPO dimers, trimers and polymers is a typical series reaction, which releases a large amount of heat, and the reaction temperature and reaction time have a great influence on the concentration distribution of the reaction product. The traditional HFPO polycondensation reaction kettle is a kettle structure, which is often operated in batches, has the outstanding disadvantages of low reaction efficiency, poor reaction stability, difficult temperature and pressure control, and thus the HFPO polycondensation reaction product is often unstable.

[0004] Therefore, it is necessary to provide a continuous HFPO polycondensation synthesis system with controllable conversion rate to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a continuous HFPO polycondensation synthesis system with controllable conversion rate, which solves the problem of unstable HFPO polycondensation reaction product caused by the traditional HFPO polycondensation reaction kettle with kettle structure, which is often operated in batches, has the outstanding disadvantages of low reaction efficiency, poor reaction stability, difficult temperature and pressure control, etc.

[0006] The utility model provides a continuous HFPO polycondensation synthesis system with controllable conversion rate, which comprises a reaction kettle, a feed pipe fixedly installed at the bottom center point of the reaction kettle, a water inlet pipe fixedly installed on one side of the outer part of the reaction kettle, a water outlet pipe fixedly installed on one side of the outer part of the reaction kettle and above the water inlet pipe, a water tank opened in the inner part of the inner wall of the reaction kettle, a one-way flow structure formed between the water inlet pipe, the water tank and the water outlet pipe, a liquid phase discharge pipe fixedly installed on the other side of the outer part of the reaction kettle along the vertical line at equal intervals, and a plurality of liquid phase discharge pipes.

[0007] Preferably, a top plate is fixedly installed on the top of the reaction kettle by screws, and a motor is fixedly installed at the top center point of the top plate.

[0008] Preferably, a transmission shaft is connected to the output shaft end of the motor and located in the inner keyway of the reaction kettle, a stirring blade is connected to the outer keyway of the transmission shaft at equal intervals, and a plurality of stirring blades are provided.

[0009] Preferably, the bottom end of the transmission shaft is fixedly installed with a material conveying rod, and the bottom end of the material conveying rod extends to the inside of the feeding pipe.

[0010] Preferably, the top of the top plate and above the motor is fixedly installed with a condenser, the top of the top plate and left of the motor is fixedly installed with a gas phase outlet pipe, the top of the top plate and right of the motor is fixedly installed with a liquid phase return pipe, the bottom of the condenser is fixedly installed with a liquid phase outlet pipe and a gas phase inlet pipe, the gas phase inlet pipe and the gas phase outlet pipe are fixedly connected through screws, the liquid phase return pipe and the liquid phase outlet pipe are fixedly connected through screws, and one end of the condenser is fixedly installed with a gas phase material outlet pipe.

[0011] Preferably, the outside of the reaction kettle is fixedly installed with a sampling pipe, and the bottom of the sampling pipe is threadedly connected with a sampling bottle.

[0012] Compared with the related art, the continuous HFPO polycondensation synthesis system with controllable conversion rate has the following beneficial effects:

[0013] The raw material HFPO and the saturated solvent with the catalyst dissolved therein are continuously fed through the feeding pipe, the cold water is introduced through the water inlet pipe, the cold water enters the inside of the water tank, after the inside of the water tank is filled with water, the water is discharged through the water outlet pipe, the temperature inside the reaction kettle is effectively and continuously reduced, under the action of stirring and catalysis, the HFPO occurs polycondensation reaction, a plurality of liquid phase outlet pipes are uniformly arranged along the vertical line of the reaction kettle, different liquid phase outlet pipes are selected and discharged according to different residence times, and different reaction conversion rates are corresponded. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a structural schematic view of a preferable embodiment of the continuous HFPO polycondensation synthesis system with controllable conversion rate provided by the utility model;

[0015] Figure 2 Fig. 2 is an installation structure schematic view of the stirring blade shown in Fig. 1; Figure 1 Fig. 3 is an installation structure schematic view of the condenser shown in Fig. 1.

[0016] Figure 3 Fig. 4 is an installation structure schematic view of the sampling pipe shown in Fig. 1. Figure 1

[0017] In the drawing: 1, reaction kettle; 2, feeding pipe; 3, water inlet pipe; 4, water outlet pipe; 5, water tank; 6, liquid phase outlet pipe; 7, top plate; 8, motor; 9, transmission shaft; 10, stirring blade; 11, material conveying rod; 12, condenser; 13, gas phase outlet pipe; 14, liquid phase return pipe; 15, gas phase inlet pipe; 16, liquid phase outlet pipe; 17, gas phase material outlet pipe; 18, sampling pipe; 19, sampling bottle. DETAILED DESCRIPTION

[0018] ​The utility model discloses make further explanation to the utility model below combining the drawing and implementation.

[0019] Please combine with the Figure 1 、 Figure 2 And Figure 3 Wherein Figure 1 It is a preferable embodiment structure diagram of the continuous HFPO polycondensation synthesis system of controllable conversion rate provided by the utility model; Figure 2 For Figure 1 The agitator blade mounting structure schematic view shown in figure 1 is shown in figure 1; Figure 3 For Figure 1 The condenser mounting structure schematic view shown in figure 1, a continuous HFPO polycondensation synthesis system of controllable conversion rate, comprising: reaction kettle 1, the bottom center point of reaction kettle 1 is fixedly installed with feed pipe 2, the outside one side of reaction kettle 1 is fixedly installed with water inlet pipe 3, the outside one side of reaction kettle 1 and located above water inlet pipe 3 is fixedly installed with water outlet pipe 4, the inside of the inner wall of reaction kettle 1 is provided with water tank 5, and one-way flow structure is formed between water inlet pipe 3, water tank 5 and water outlet pipe 4, the outside other side of reaction kettle 1 is fixedly installed with liquid phase discharge pipe 6 along the vertical line equidistantly, and the number of liquid phase discharge pipe 6 is multiple, raw material HFPO and saturated solvent with dissolved catalyst are continuously fed through feed pipe 2, cold water is introduced into water inlet pipe 3, cold water enters the inside of water tank 5, after water tank 5 is filled with water, water is discharged from water outlet pipe 4, effectively continuously reduces the internal temperature of reaction kettle 1, under the action of stirring and catalysis, HFPO occurs polycondensation reaction, and a plurality of liquid phase discharge pipes 6 are evenly arranged along the vertical line of reaction kettle 1, and different liquid phase discharge pipes 6 are selected and discharged according to different residence time, and different reaction conversion rates are corresponded.

[0020] The top of reaction kettle 1 is fixedly installed with top plate 7 through screw, the top center point of top plate 7 is fixedly installed with motor 8, the output shaft end of motor 8 and located inside the key groove connection of reaction kettle 1 is connected with transmission shaft 9, the outside equidistant key groove connection of transmission shaft 9 is connected with agitator blade 10, and the number of agitator blade 10 is multiple, the bottom end of transmission shaft 9 is fixedly installed with feed rod 11, the bottom end of feed rod 11 extends to the inside of feed pipe 2, the rotation of transmission shaft 9 is driven by the work of motor 8, the rotation of transmission shaft 9 drives the rotation of agitator blade 10, and then the material in the inside of reaction kettle 1 is effectively stirred and handled, so that the reaction efficiency is improved, the rotation of transmission shaft 9 drives the rotation of feed rod 11, if solid material enters, the rotation of feed rod 11 effectively prevents the blockage of feed pipe 2.

[0021] The top of the top plate 7 and above the motor 8 is fixedly installed with a condenser 12, the top of the top plate 7 and left of the motor 8 is fixedly installed with a gas phase outlet pipe 13, the top of the top plate 7 and right of the motor 8 is fixedly installed with a liquid phase return pipe 14, the bottom of the condenser 12 is fixedly installed with a liquid phase outlet pipe 16 and a gas phase inlet pipe 15, the gas phase inlet pipe 15 and the gas phase outlet pipe 13 are fixedly connected through screws, the liquid phase return pipe 14 and the liquid phase outlet pipe 16 are fixedly connected through screws, one end of the condenser 12 is fixedly installed with a gas phase material outlet pipe 17, the gas phase material outlet pipe 17 of the condenser 12 is arranged as a non-condensed gas vent, the non-condensed gas vent of the condenser 12 is provided with a vent adjusting valve, the pressure of the reaction kettle 1 is controlled through the vent adjusting valve, the reaction kettle 1 is provided with a pressure transmitter, the gas phase at the top of the reaction kettle 1 enters the condenser 12, the condensed liquid phase returns to the reaction kettle 1, the non-condensed gas is vented, and the vent adjusting valve controls the pressure of the reaction system.

[0022] The outside of the reaction kettle 1 is fixedly installed with a sampling pipe 18, the bottom of the sampling pipe 18 is threadedly connected with a sampling bottle 19, the valve of the sampling pipe 18 is loosened, the material enters the sampling bottle 19 through the sampling pipe 18, and the sampling bottle 19 is removed to facilitate detection of the material.

[0023] The working principle of the continuous HFPO polycondensation synthesis system with controllable conversion rate provided by the utility model is as follows:

[0024] First step: the raw material HFPO and the saturated solvent with the dissolved catalyst are continuously fed through the feeding pipe 2, cold water is introduced through the water inlet pipe 3, the cold water enters the inside of the water tank 5, after the inside of the water tank 5 is filled with water, the water is discharged from the water outlet pipe 4, the inside temperature of the reaction kettle 1 is effectively and continuously reduced, under the action of stirring and catalysis, the HFPO occurs polycondensation reaction, a plurality of liquid phase discharge pipes 6 are uniformly arranged along the vertical line of the reaction kettle 1, different liquid phase discharge pipes 6 are selected and discharged according to different residence times, corresponding different reaction conversion rates, the transmission shaft 9 is driven to rotate through the work of the motor 8, the stirring blade 10 is driven to rotate through the rotation of the transmission shaft 9, and then the inside material of the reaction kettle 1 is effectively stirred and treated, so that the reaction efficiency is improved, the transmission shaft 9 is driven to rotate in the process, and the feeding rod 11 is driven to rotate, if solid material enters, the feeding pipe 2 is effectively prevented from being blocked through the rotation of the feeding rod 11.

[0025] Second step: the gas phase material outlet pipe 17 of the condenser 12 is arranged as a non-condensed gas vent, the non-condensed gas vent of the condenser 12 is provided with a vent adjusting valve, the pressure of the reaction kettle 1 is controlled through the vent adjusting valve, the reaction kettle 1 is provided with a pressure transmitter, the gas phase at the top of the reaction kettle 1 enters the condenser 12, the condensed liquid phase returns to the reaction kettle 1, the non-condensed gas is vented, and the vent adjusting valve controls the pressure of the reaction system.

[0026] Compared with the related art, the continuous HFPO polycondensation synthesis system with controllable conversion rate has the following beneficial effects:

[0027] The raw material HFPO and the saturated solvent with the catalyst dissolved therein are continuously fed through the feeding pipe 2, the cold water is introduced through the water inlet pipe 3, the cold water enters the inside of the water tank 5, after the inside of the water tank 5 is filled with water, the water is discharged through the water outlet pipe 4, the temperature inside the reaction kettle 1 is effectively and continuously reduced, under the action of stirring and catalysis, the HFPO occurs polycondensation reaction, a plurality of liquid phase discharge pipes 6 are uniformly arranged along the vertical line of the reaction kettle 1, different liquid phase discharge pipes 6 are selected and discharged according to different residence times, and different reaction conversion rates are corresponded.

[0028] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structures or equivalent process conversions made by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A continuous HFPO polycondensation synthesis system with controllable conversion, comprising: A reactor (1) is characterized in that: a feed pipe (2) is fixedly installed at the center point of the bottom of the reactor (1), a water inlet pipe (3) is fixedly installed on one side of the outside of the reactor (1), a water outlet pipe (4) is fixedly installed on one side of the outside of the reactor (1) and above the water inlet pipe (3), a water trough (5) is opened inside the inner wall of the reactor (1), and a one-way flow structure is formed between the water inlet pipe (3), the water trough (5) and the water outlet pipe (4), and liquid phase discharge pipes (6) are fixedly installed on the other side of the outside of the reactor (1) at equal intervals along a vertical line, and the number of liquid phase discharge pipes (6) is multiple.

2. A continuous HFPO polycondensation synthesis system with controllable conversion according to claim 1, characterized in that: A top plate (7) is fixedly mounted on the top of the reactor (1) by screws, and a motor (8) is fixedly mounted at the top center point of the top plate (7).

3. A continuous HFPO polycondensation synthesis system with controllable conversion according to claim 2, characterized in that: The output shaft end of the motor (8) is connected to a transmission shaft (9) through an internal keyway located in the reactor (1), and the external equidistant keyways of the transmission shaft (9) are connected to stirring blades (10), and the number of stirring blades (10) is multiple.

4. A continuous HFPO polycondensation synthesis system with controllable conversion according to claim 3, characterized in that: A feeding rod (11) is fixedly mounted on the bottom end of the transmission shaft (9), and the bottom end of the feeding rod (11) extends into the interior of the feeding pipe (2).

5. A continuous HFPO polycondensation synthesis system with controllable conversion according to claim 2, characterized in that: A condenser (12) is fixedly installed on the top of the top plate (7) and located above the motor (8), a gas phase outlet pipe (13) is fixedly installed on the top of the top plate (7) and located on the left side of the motor (8), a liquid phase return pipe (14) is fixedly installed on the top of the top plate (7) and located on the right side of the motor (8), a liquid phase outlet pipe (16) and a gas phase inlet pipe (15) are fixedly installed on the bottom of the condenser (12), the gas phase inlet pipe (15) and the gas phase outlet pipe (13) are fixedly connected by screws, the liquid phase return pipe (14) and the liquid phase outlet pipe (16) are fixedly connected by screws, and a gas phase material outlet pipe (17) is fixedly installed on one end of the condenser (12).

6. A continuous HFPO polycondensation synthesis system with controllable conversion according to claim 1, characterized in that: A sampling tube (18) is fixedly installed on the outside of the reactor (1), and a sampling bottle (19) is threadedly connected to the bottom of the sampling tube (18).

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