A condensation device for reducing mixing time of phenylethyl malonic acid diethyl ester production

Abstract

The present application relates to ethyl malonate mixing technical field, specifically, it relates to a kind of condensation device for reducing mixing time of diethyl phenylethyl malonate production.The condensation device includes mixing bin, condensation kettle, stirring device and storage bin fixedly arranged at the top of mixing bin, the bottom of mixing bin is communicated with condensation kettle with communicating pipe, storage bin is formed with liquid storage cavity and nitrogen cavity for storing raw materials and nitrogen respectively in the inside, and isolating mechanism for separating first mixed liquid and secondary mixed liquid is movably arranged in the inside of mixing bin.The gravity of secondary mixed liquid on the floating plate is used to pressurize first mixed liquid in discharge cavity, at the same time, the gravity of secondary mixed liquid is used to hit reciprocating plate, so that nitrogen in nitrogen cavity is transported into discharge cavity, the pressure in discharge cavity is increased, the speed of liquid discharge is improved, and in the process of first mixed liquid discharge, stirring device can also stir first mixed liquid and secondary mixed liquid simultaneously, so as to shorten mixing time.

Description

Technical Field

[0001] This invention relates to the field of diethyl phenylmalonate mixing technology, and more specifically, to a condensation apparatus for the production of diethyl phenylmalonate that reduces mixing time. Background Technology

[0002] Diethyl phenylethyl malonate is a chemical with a molecular weight of 264.32. It is an organic synthesis raw material used as an intermediate in the production of drugs such as phenobarbital and primidone. It is a colorless to pale yellow transparent liquid with a peculiar odor, insoluble in water but soluble in ethanol and ether.

[0003] There are many existing technologies for condensation devices, such as:

[0004] Chinese Patent Publication No. CN218189652U discloses a combined condensation device for the production of diethyl phenyl ethyl malonate. A raised platform is set at the center of the mixing silo, and a motor is set at the center of the upper surface of the silo cover. The output shaft of the motor passes through the silo cover and is connected to the upper main shaft through a first coupling. The upper main shaft passes through the mixing silo and the raised platform. The upper part of the upper main shaft is connected to a mixing agitator. A jacket is set around the condensation vessel. The bottom of the upper main shaft is connected to the lower main shaft through a second coupling. A condensation agitator is set at the bottom of the lower main shaft. The upper surface of the vessel cover is connected to the bottom of the connecting seat. The feed inlet on the upper surface of the vessel cover is connected to the discharge outlet.

[0005] In existing technologies, to reduce liquid mixing time, multiple mixing mechanisms are typically used to mix different raw materials. This increases the overall operating cost. Alternatively, a combined structure is used, with a mixing mechanism at the top and a condensation vessel at the bottom, where mixing is performed first and then condensation. While this method can improve the mixing effect, the raw materials to be added to the mixing hopper cannot be added until the mixture in the mixing hopper has been completely drained. During this time, the raw materials to be added are not mixed, resulting in the raw materials in the mixing hopper needing to be completely drained after each mixing process before new raw materials can be added. This increases the waiting time for mixing and affects efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a condensation apparatus for the production of diethyl phenyl ethyl malonate that reduces mixing time, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention aims to provide a condensation apparatus for the production of diethyl phenyl ethyl malonate that reduces mixing time. The apparatus includes a mixing silo, a condensation kettle, a stirring device, and a storage silo fixedly mounted at the top of the mixing silo. A connecting pipe connects the bottom of the mixing silo to the condensation kettle. The storage silo contains a liquid storage chamber and a nitrogen chamber for storing raw materials and nitrogen, respectively. An isolation mechanism is movably installed inside the mixing silo to separate the primary and secondary mixtures. A stop body is fixedly installed at the center of the mixing silo. When the level of the primary mixture in the mixing silo drops slightly below the top of the stop body, the secondary mixture in the liquid storage chamber is discharged into the mixing silo. The isolation mechanism, in conjunction with the stop body, forms a drainage chamber at the bottom of the mixing silo. Reciprocating mechanisms are spaced from bottom to top inside the mixing silo above the isolation mechanism. The secondary mixture impacts the reciprocating mechanisms, which pressurize the nitrogen in the nitrogen chamber into the drainage chamber to increase the pressure within the drainage chamber.

[0008] As a further improvement to this technical solution, the reciprocating mechanism includes an inverted cone-shaped reciprocating plate and a piston rod fixedly installed on the upper edge of the reciprocating plate. A tension spring is elastically connected between the reciprocating plate and the inner wall of the mixing chamber. The stirring device passes through the middle of the reciprocating plate and leaves a liquid guiding channel between the reciprocating plate and the stirring device. Several liquid guiding holes are opened on the reciprocating plate around the stirring device. The liquid flow rate through the liquid guiding holes and the liquid guiding channel is greater than the liquid flow rate discharged from the connecting pipe.

[0009] As a further improvement to this technical solution, a piston cylinder is fitted and fixedly installed on the inner wall of the mixing chamber at the upper end of the piston rod. The top of the piston cylinder is connected to a gas supply pipe extending into the nitrogen chamber and a gas guide pipe connecting to the drainage chamber. Both the gas supply pipe and the gas guide pipe are equipped with one-way valves. The one-way valve in the gas supply pipe is used to supply nitrogen from the nitrogen chamber to the piston cylinder, while the one-way valve in the gas guide pipe is used to supply nitrogen from the piston cylinder to the drainage chamber, thereby increasing the pressure in the drainage chamber.

[0010] As a further improvement to this technical solution, the isolation mechanism includes an upper floating plate that fits with the stop body, and a lower floating plate located below the upper floating plate and attached to it. Both the upper and lower floating plates are provided with drainage channels for liquid to enter the drainage chamber. Under normal conditions, the drainage channels on the upper floating plate and the lower floating plate are misaligned to separate the primary mixture from the secondary mixture. When the primary mixture in the drainage chamber is completely discharged, the drainage channels on the upper floating plate and the lower floating plate are connected to allow the secondary mixture to flow into the drainage chamber.

[0011] As a further improvement to this technical solution, a stop block is fixedly connected to the storage bin at the upper end of the outer ring of the floating plate. The stop block is higher than the top of the stop body in the horizontal direction and is used to restrict the floating of the floating plate. When the floating plate contacts the stop block, a liquid-repellent channel is formed between the floating plate and the stirring device, which connects the draining chamber with the upper end of the floating plate.

[0012] As a further improvement to this technical solution, a vertical rod is fixedly installed on the upper floating plate, close to the inner wall of the mixing chamber. The vertical rod passes through the connecting pipe and the reciprocating plate, and its top extends into the liquid storage chamber. The bottom of the liquid storage chamber has several through grooves, and a valve plate is slidably installed below the liquid storage chamber at the position corresponding to the through groove. The valve plate is used to restrict the discharge of secondary mixed liquid in the liquid storage chamber.

[0013] As a further improvement to this technical solution, several square grooves corresponding to the through grooves are opened at intervals on the valve plate. Under normal conditions, the square grooves and the through grooves are misaligned. One end of the valve plate is elastically connected to the bottom of the liquid storage chamber with a return spring, and the other end is attached to a limiting block that is fixedly connected to the upright. When the limiting block is disengaged from the end of the valve plate, the square grooves and the through grooves are in a conductive state.

[0014] As a further improvement to this technical solution, a convex plate with its bottom bent outward at a right angle is fixedly installed at the bottom of the upper floating plate, a coil spring is elastically installed between the convex plate and the lower floating plate, and a silicone strip that contacts the upper surface of the inner ring of the lower floating plate is fixedly installed inside the convex plate.

[0015] As a further improvement to this technical solution, when the upper and lower floating plates move upward, the silicone strip is used to slow down the rotation of the lower floating plate, and a wedge block is fixedly installed at the bottom of the convex plate. A crossbar is slidably connected inside the wedge block, and the crossbar is fixedly installed at the lower end of the stop body.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the condensation device for producing diethyl phenyl ethyl malonate that reduces mixing time, the gravity of the secondary mixture on the upper floating plate is used to pressurize the primary mixture in the discharge chamber. At the same time, the gravity of the secondary mixture is used to strike the reciprocating plate, causing nitrogen in the nitrogen chamber to be transported into the discharge chamber, increasing the pressure in the discharge chamber and increasing the liquid discharge speed. During the discharge of the primary mixture, the stirring device can also stir the primary mixture and the secondary mixture at the same time, thereby shortening the mixing time.

[0018] 2. In the condensation device for producing diethyl phenyl ethyl malonate with reduced mixing time, when the height of the upper and lower floating plates gradually decreases until the first mixture in the draining chamber is about to be completely discharged, the draining channels in the upper and lower floating plates are always in a misaligned state, thereby isolating the first mixture from the second mixture and preventing them from mixing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a front view of the internal structure of the mixing silo, condensation kettle, and storage silo of the present invention.

[0021] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the diagram;

[0022] Figure 4 The right view shows the cross-sectional internal structure of the mixing silo and condensation kettle of the present invention.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the reciprocating plate of the present invention;

[0024] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B in the diagram;

[0025] Figure 7 This is an exploded view of the reciprocating plate and the floating plate of the present invention;

[0026] Figure 8 This is a schematic diagram of the exploded structure of the upper and lower floating plates of the present invention;

[0027] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B in the diagram;

[0028] Figure 10 This is a partial schematic diagram of the cross-sectional structure of the mixing silo of the present invention.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 100. Mixing bin; 101. Condensation vessel; 102. Agitator; 103. Baffle; 104. Connecting pipe;

[0031] 110. Storage bin; 111. Liquid storage chamber; 112. Nitrogen chamber; 113. Through channel;

[0032] 120. Reciprocating mechanism; 121. Reciprocating plate; 122. Piston rod; 123. Piston cylinder; 124. Gas supply pipe; 125. Gas guide pipe; 126. One-way valve; 127. Tension spring; 128. Liquid guide hole; 129. Liquid guide channel;

[0033] 130. Isolation mechanism; 131. Upper float plate; 132. Lower float plate; 133. Drainage channel; 134. Convex plate; 135. Coil spring; 136. Silicone strip; 137. Wedge block; 138. Liquid-repellent channel;

[0034] 140. Stop body; 141. Crossbar;

[0035] 150. Upright pole; 151. Limiting block; 152. Valve plate; 153. Square groove; 154. Return spring. Detailed Implementation

[0036] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] like Figure 1 , Figure 2 and Figure 4As shown, a condensation apparatus for producing diethyl phenyl ethyl malonate with reduced mixing time is provided. It includes a mixing chamber 100, a condensation vessel 101, a stirring device 102, and a storage chamber 110 fixedly installed at the top of the mixing chamber 100. A connecting pipe 104 connects the bottom of the mixing chamber 100 to the condensation vessel 101. The storage chamber 110 contains a liquid storage chamber 111 and a nitrogen chamber 112 for storing raw materials and nitrogen, respectively. An isolation mechanism 130 is movably installed inside the mixing chamber 100 to separate the primary and secondary mixtures. A stop body 14 is fixedly installed at the center of the mixing chamber 100. 0. When the liquid level of the initial mixture in the mixing chamber 100 drops to slightly below the top of the stop body 140, the secondary mixture in the storage chamber 111 is discharged into the mixing chamber 100. The isolation mechanism 130, together with the stop body 140, forms a discharge chamber at the bottom of the mixing chamber 100. A reciprocating mechanism 120 is arranged at intervals from bottom to top in the mixing chamber 100 above the isolation mechanism 130. The secondary mixture is thrown against the reciprocating mechanism 120. The reciprocating mechanism 120 is used to press the nitrogen in the nitrogen chamber 112 into the discharge chamber to increase the pressure in the discharge chamber and increase the speed at which the initial mixture is discharged into the condensation vessel 101.

[0040] It should be clarified that when the raw materials undergo a condensation reaction, the raw materials in the mixing chamber 100 are the initial mixture, while the liquid to be mixed in the storage chamber 111 is the secondary mixture.

[0041] After the initial mixture is properly mixed, it is gradually discharged into the condensation vessel 101. When the level of the initial mixture drops to slightly below the top of the stop body 140, some of the initial mixture that has not yet been completely discharged remains in the discharge chamber. Meanwhile, the secondary mixture in the storage chamber 111 flows to the top of the isolation mechanism 130 and is stirred and mixed under the action of the stirring device 102. At the same time, the level of the secondary mixture on the isolation mechanism 130 rises and its weight increases. The gravity of the secondary mixture is used to pressurize the initial mixture in the discharge chamber, thereby saving the time for mixing the raw materials. This allows the stirring device 102 to stir both raw materials simultaneously, saving mixing time.

[0042] Furthermore, during the process of the secondary mixture in the storage chamber 111 being discharged onto the isolation mechanism 130, the impact of the secondary mixture on the reciprocating mechanism 120 can be used to pressurize the discharge chamber in conjunction with the nitrogen in the nitrogen chamber 112, thereby further increasing the discharge speed of the primary mixture and saving mixing time.

[0043] Therefore, based on the above figures and in conjunction with Figure 3 , Figure 5The specific structure of the reciprocating mechanism 120 is further disclosed. The reciprocating mechanism 120 includes a reciprocating plate 121 in the shape of an inverted cone and a piston rod 122 fixedly disposed on the upper edge of the reciprocating plate 121. A tension spring 127 is elastically connected between the reciprocating plate 121 and the inner wall of the mixing chamber 100. The stirring device 102 passes through the middle of the reciprocating plate 121 and leaves a liquid guiding channel 129 between it and the reciprocating plate 121. A plurality of liquid guiding holes 128 are opened on the reciprocating plate 121 around the stirring device 102. The liquid flow rate through the liquid guiding holes 128 and the liquid guiding channel 129 is greater than the liquid flow rate discharged from the connecting pipe 104.

[0044] On the other hand, a piston cylinder 123 is fitted and fixedly installed on the inner wall of the mixing chamber 100 at the upper end of the piston rod 122. The top of the piston cylinder 123 is connected to a gas supply pipe 124 extending into the nitrogen chamber 112 and a gas guide pipe 125 connecting to the drainage chamber. Both the gas supply pipe 124 and the gas guide pipe 125 are equipped with one-way valves 126. The one-way valve 126 located in the gas supply pipe 124 is used to supply nitrogen in the nitrogen chamber 112 to the piston cylinder 123, while the one-way valve 126 located in the gas guide pipe 125 is used to supply nitrogen in the piston cylinder 123 to the drainage chamber, thereby increasing the pressure in the drainage chamber.

[0045] Working principle: When the secondary mixture in the storage chamber 111 flows into the mixing bin 100, under the impact of the secondary mixture, the secondary mixture overcomes the elastic potential energy of the tension spring 127 and moves downward. During the downward movement of the reciprocating plate 121, the piston rod 122 draws gas into the piston cylinder 123 through the gas supply pipe 124. During the upward movement of the reciprocating plate 121, the piston rod 122 transports the gas in the piston cylinder 123 to the discharge chamber through the gas guide pipe 125, thereby increasing the gas pressure inside the discharge chamber. This provides power to push the primary mixture that has not yet been completely discharged into the discharge chamber, increasing the speed at which the primary mixture is discharged into the condensation kettle 101 and shortening the mixing time.

[0046] Secondly, since the isolation mechanism 130 is immersed in the initial mixture during the mixing process, when the initial mixture is discharged to a level slightly below the top of the stop 140, the isolation mechanism 130 releases the secondary mixture from the storage chamber 111, as shown below:

[0047] Before releasing the secondary mixture in the storage chamber 111, the specific structure of the isolation mechanism 130 will be disclosed. Please refer to [the relevant information]. Figure 4 , Figure 8As shown, the isolation mechanism 130 includes an upper float plate 131 that is fitted and cooperates with the stop body 140, and a lower float plate 132 located below the upper float plate 131 and in contact with the upper float plate 131. Both the upper float plate 131 and the lower float plate 132 are provided with drainage channels 133 for allowing liquid to enter the drainage chamber. Under normal conditions, the drainage channels 133 on the upper float plate 131 and the lower float plate 132 are misaligned to separate the primary mixture from the secondary mixture. When the primary mixture in the drainage chamber is completely discharged, the drainage channels 133 on the upper float plate 131 and the lower float plate 132 are connected to allow the secondary mixture to flow into the drainage chamber.

[0048] It is worth noting that the normal state referred to above refers to the process when the height of the upper float plate 131 and the lower float plate 132 gradually decreases until the first mixture in the drainage chamber is about to be completely discharged. During this process, the drainage channels 133 in the upper float plate 131 and the lower float plate 132 are always misaligned, thereby isolating the first mixture from the second mixture and preventing them from mixing.

[0049] Furthermore, in order to limit the excessive upward floating of the upper floating plate 131 and the lower floating plate 132 submerged in the initial mixture, therefore, combined with Figure 7 and Figure 10 As shown, the upper end of the outer ring of the upper float plate 131 has a stop block 103 fixedly connected to the storage bin 110. The stop block 103 is higher than the top of the stop body 140 in the horizontal direction and is used to restrict the upward floating of the upper float plate 131. When the upper float plate 131 contacts the stop block 103, a liquid-repellent channel 138 is formed between the upper float plate 131 and the stirring device 102, which connects the liquid discharge chamber with the upper end of the upper float plate 131.

[0050] In this way, the baffle 103 blocks the floating plate 131, and the stirring device 102 starts to stir the first mixture. The first mixture above the floating plate 131 and the first mixture below the floating plate 131 are connected through the liquid-repellent channel 138 so as to facilitate the exchange between the first mixture at the upper end and the first mixture at the lower end of the floating plate 131, thereby improving the mixing effect.

[0051] Now let's return to... Figure 4 , Figure 7 and combined Figure 6As shown, a vertical rod 150 is fixedly installed on the upper floating plate 131, close to the inner wall of the mixing chamber 100. The vertical rod 150 passes through the stop block 103 and the reciprocating plate 121, and its top extends into the liquid storage chamber 111. The bottom of the liquid storage chamber 111 has several through grooves 113. A valve plate 152 is slidably installed below the liquid storage chamber 111 at the position corresponding to the through grooves 113. The valve plate 152 is used to restrict the discharge of secondary mixed liquid in the liquid storage chamber 111. Next, several square grooves 153 corresponding to the through grooves 113 are opened at intervals on the valve plate 152. Under normal conditions, the square grooves 153 and the through grooves 113 are in a misaligned state. One end of the valve plate 152 is elastically connected to the bottom of the liquid storage chamber 111 by a return spring 154, and the other end is attached to a limiting block 151 fixedly connected to the vertical rod 150. When the limiting block 151 is disengaged from the end of the valve plate 152, the square grooves 153 and the through grooves 113 are in a conductive state.

[0052] Specific working principle: When both the upper float plate 131 and the lower float plate 132 are submerged in the initial mixture, the buoyancy of the upper float plate 131 and the lower float plate 132 overcomes the elastic potential energy of the return spring 154. Through the limiting block 151, the valve plate 152 applies a pushing force to the return spring 154. The square groove 153 and the through groove 113 on the valve plate 152 change from the original conductive state to the misaligned state. Therefore, the secondary mixture in the storage chamber 111 is restricted. That is to say, after the initial mixture has been added for a period of time, the secondary mixture is added to the storage chamber 111 for later use.

[0053] Secondly, during the initial discharge of the mixed liquid into the condensation vessel 101, the drain channels 133 on the upper float plate 131 and the lower float plate 132 are always misaligned. When the upper float plate 131 moves downward until the drain channel 138 disappears, the limiting block 151 disengages from one end of the valve plate 152. Under the elastic action of the reset spring 154, the valve plate 152 is pushed in the opposite direction, and the square groove 153 and the through groove 113 gradually connect and overlap. The secondary mixed liquid in the storage chamber 111 falls onto the reciprocating plate 121. With the use of the tension spring 127, the reciprocating plate 121 moves up and down, thereby introducing the nitrogen in the nitrogen chamber 112 into the discharge chamber below the lower float plate 132, increasing the pressure in the discharge chamber, increasing the discharge speed of the initial mixed liquid in the discharge chamber, saving time, and the nitrogen introduced into the discharge chamber can also improve the mixing effect of the initial mixed liquid.

[0054] Next, let's combine... Figure 3 , Figure 5As shown, the gravity of the secondary mixture on the upper floating plate 131 is used to pressurize the primary mixture in the discharge chamber. At the same time, the gravity of the secondary mixture is used to strike the reciprocating plate 121, causing the nitrogen in the nitrogen chamber 112 to be transported into the discharge chamber, increasing the pressure in the discharge chamber and increasing the liquid discharge speed. During the discharge of the primary mixture, the stirring device 102 can also stir the primary mixture and the secondary mixture at the same time, thereby shortening the mixing time.

[0055] In addition, combined Figure 4 , Figure 8 , Figure 9 , Figure 10 As shown, a convex plate 134 with its bottom bent outward at a right angle is fixedly installed at the bottom of the upper floating plate 131. A coil spring 135 is elastically installed between the convex plate 134 and the lower floating plate 132. A silicone strip 136 is fixedly installed inside the convex plate 134 and contacts the upper surface of the inner ring of the lower floating plate 132. When the upper floating plate 131 and the lower floating plate 132 move upward, the silicone strip 136 is used to delay the rotation of the lower floating plate 132. A wedge block 137 is fixedly installed at the bottom of the convex plate 134. A crossbar 141 is slidably connected inside the wedge block 137. The crossbar 141 is fixedly installed at the lower end of the stop body 140.

[0056] When the upper floating plate 131 and the lower floating plate 132 descend to Figure 4 When the wedge block 137 reaches the position indicated by the dotted line, it descends until it gradually contacts the crossbar 141. At this point, the initial mixture in the discharge chamber is completely discharged, and the valve on the connecting pipe 104 is closed. Next, under the influence of gravity, the wedge block 137 is blocked by the crossbar 141 and rotates. The elastic potential energy of the coil spring 135 increases, and the discharge channels 133 on the upper float plate 131 and lower float plate 132 are connected. The secondary mixture above the upper float plate 131 is discharged into the discharge chamber. As the liquid level rises, the upper float plate 131 and the lower float plate 132 move upward under the buoyancy of the upper float plate 131 and the lower float plate 132. The silicone strip 136 delays the reset of the lower float plate 132 so that when the liquid channel 138 is about to appear, the liquid above the upper float plate 131 can enter the discharge chamber until the upper float plate 131 is submerged in the secondary mixture. Then, the mixture is added to the storage chamber 111 three times... and so on. Finally, the nitrogen in the discharge chamber is discharged through the top of the mixing chamber 100.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A condensation device for reducing mixing time for producing phenylethyl malonic acid diethyl ester, comprising a mixing bin, a condensation kettle, a stirring device, and a storage bin fixedly arranged at the top end of the mixing bin, and a communication pipe in communication with the condensation kettle at the bottom of the mixing bin, characterized in that: The storage bin is internally formed with a storage cavity for storing raw materials and a nitrogen cavity for storing nitrogen; The mixing bin is internally movably provided with a separation mechanism for separating the first mixed liquid from the second mixed liquid, and is internally centrally fixedly provided with a stop body; When the liquid level of the first mixed liquid in the mixing bin drops to slightly below the top end of the stop body, the second mixed liquid in the storage cavity is discharged into the mixing bin, and the separation mechanism cooperates with the stop body to form a discharge cavity at the bottom end of the mixing bin; The mixing bin is internally spacedly provided above the separation mechanism with reciprocating mechanisms from bottom to top, which are used for pressing the nitrogen in the nitrogen cavity into the discharge cavity to increase the pressure in the discharge cavity by being hit by the second mixed liquid; The reciprocating mechanism comprises an inverted conical reciprocating plate and a piston rod fixedly arranged at the upper end of the edge of the reciprocating plate, wherein a tension spring is elastically connected between the reciprocating plate and the inner wall of the mixing bin, the middle part of the reciprocating plate is penetrated by the stirring device and a liquid guide channel is left between the reciprocating plate, a plurality of liquid guide holes are formed around the reciprocating plate, and the liquid flow through the liquid guide holes and the liquid guide channel is greater than the liquid flow discharged from the communication pipe; The upper end of the piston rod is sleeved with a piston cylinder fixedly arranged on the inner wall of the mixing bin, the top end of the piston cylinder is communicated with a gas delivery pipe extending into the nitrogen cavity and a gas guide pipe communicated with the discharge cavity, a one-way valve is arranged in each of the gas delivery pipe and the gas guide pipe, the one-way valve in the gas delivery pipe is used for supplying the nitrogen in the nitrogen cavity into the piston cylinder, and the one-way valve in the gas guide pipe is used for supplying the nitrogen in the piston cylinder into the discharge cavity to increase the pressure in the discharge cavity; The separation mechanism comprises an upper floating plate sleeved with the stop body and a lower floating plate below the upper floating plate and abutting against the upper floating plate, the upper floating plate and the lower floating plate are both provided with a discharge channel for supplying liquid into the discharge cavity, in a normal state, the discharge channel on the upper floating plate is in a misaligned state with the discharge channel on the lower floating plate to separate the first mixed liquid from the second mixed liquid, and when the first mixed liquid in the discharge cavity is completely discharged, the discharge channel on the upper floating plate is in a conductive state with the discharge channel on the lower floating plate to make the second mixed liquid flow into the discharge cavity; A vertical rod is fixedly arranged on the upper floating plate and abuts against the inner wall of the mixing bin, the vertical rod penetrates the communication pipe and the reciprocating plate, and the top end extends into the storage cavity, the bottom of the storage cavity is provided with a plurality of through grooves, and a valve plate is slidably arranged below the storage cavity at a position corresponding to the through grooves, the valve plate is used for limiting the discharge of the second mixed liquid in the storage cavity.

2. The condensation device for reducing mixing time of phenylethyl malonate diethyl ester production according to claim 1, characterized in that: The upper end of the outer ring of the upper floating plate is provided with a stop block fixedly connected with the storage bin, the stop block is higher than the top end of the stop body in the horizontal direction and is used for limiting the floating of the upper floating plate, and when the upper floating plate contacts with the stop block, a liquid discharge channel is formed between the upper floating plate and the stirring device to communicate the discharge cavity with the top end of the upper floating plate.

3. The condensation device for reducing mixing time of phenylethyl malonate diethyl ester production according to claim 1, characterized in that: A plurality of square grooves corresponding to the through grooves are spacedly arranged on the valve plate, in a normal state, the square grooves are in a misaligned state with the through grooves, one end of the valve plate is elastically connected with the bottom of the storage cavity by a return spring, and the other end abuts against a limiting block fixedly connected with the vertical rod, when the limiting block is separated from the end of the valve plate, the square grooves are in a conductive state with the through grooves.

4. The condensation device for reducing mixing time of phenylethyl malonate diethyl ester production according to claim 1, characterized in that: The convex plate is fixedly arranged at the bottom of the upper floating plate and is outwardly bent at a right angle at the bottom, an elastic coil spring is arranged between the convex plate and the lower floating plate, and a silica gel strip is fixedly arranged in the convex plate and in contact with the upper surface of the inner ring of the lower floating plate.

5. The condensation device for reducing mixing time of phenylethyl malonate diethyl ester production according to claim 4, characterized in that: When the upper floating plate and the lower floating plate are moved upwards, the silica gel strip is used to delay the rotation of the lower floating plate, a wedge block is fixedly arranged at the bottom of the convex plate, a horizontal rod is slidably connected in the wedge block, and the horizontal rod is fixedly arranged at the lower end of the stop body.

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