Continuous condensation production device for alpha-ethyl cyanoacrylate
By employing a continuous production unit with multiple reactors connected in series in the production of ethyl α-cyanoacrylate, the problem of low efficiency in traditional batch production has been solved, achieving efficient material transfer and reaction control, thereby improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202520022267.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In the traditional production of ethyl α-cyanoacrylate, the batch-type batch reaction results in low production efficiency, as well as low equipment and labor efficiency.
The continuous production unit employs multiple reactors connected in series, namely a feeding reactor, a material reaction reactor, a desolvation reactor, and a transfer reactor. The continuous transfer of materials is achieved through a material transfer pump, and the unit is equipped with temperature sensors, level gauges, and solenoid valves. A PLC control system is used to regulate the reaction temperature and liquid level, thereby improving production efficiency.
This technology enables continuous production of ethyl α-cyanoacrylate, improving production efficiency and equipment utilization while reducing equipment wear and tear and labor costs.
Smart Images
Figure CN223888012U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical production technology, specifically relating to a continuous condensation production device for ethyl α-cyanoacrylate. Background Technology
[0002] Currently, the traditional synthesis process for ethyl α-cyanoacrylate production is mostly a batch reactor, consisting of steps such as condensation, cracking, and purification. Batch production results in long single-batch reaction times and low efficiency in terms of equipment and labor. Utility Model Content
[0003] This invention provides a continuous condensation production apparatus for ethyl α-cyanoacrylate, which aims to solve the problem of low efficiency in traditional intermittent production.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A continuous condensation production apparatus for ethyl α-cyanoacrylate is provided, comprising: a first reactor, a second reactor, a third reactor, and a fourth reactor connected in series via pipelines; a first material transfer pump is installed on the connecting pipeline between the first reactor and the second reactor, a second material transfer pump is installed on the connecting pipeline between the second reactor and the third reactor, and a third material transfer pump is installed between the third reactor and the fourth reactor; a fourth material transfer pump is installed on the discharge pipeline of the fourth reactor; the first reactor serves as a feeding vessel, and its top is also provided with a paraformaldehyde inlet and a liquid material inlet.
[0005] In one possible implementation, a first condenser is provided at the top of the first reactor, the top air inlet of the first condenser is connected to the top of the first reactor through a first exhaust pipe, the bottom liquid outlet of the first condenser is connected to the top of the first reactor through a first return liquid pipe, and the bottom exhaust port of the first condenser is connected to an exhaust gas treatment device through a first exhaust gas pipeline.
[0006] In one possible implementation, the first reactor is further provided with a first temperature sensor, a first level gauge, and a first solenoid valve for controlling the entry of steam; the first temperature sensor is interlocked with the first solenoid valve, and the first level gauge is interlocked with the first material transfer pump.
[0007] In one possible implementation, the second reactor serves as a material reactor, with a second condenser installed at the top. The top inlet of the second condenser is connected to the top of the second reactor via a second exhaust pipe, and the bottom outlet of the second condenser is connected to the top of the second reactor via a second return pipe. The bottom outlet of the second condenser is connected to the exhaust gas treatment device via a second exhaust gas pipeline.
[0008] In one possible embodiment, the second reactor is further provided with a second temperature sensor, a second level gauge, and a second solenoid valve for controlling the entry of steam; the second temperature sensor is interlocked with the second solenoid valve, and the second level gauge is interlocked with the second material transfer pump.
[0009] In one feasible embodiment, the third reactor serves as a solvent removal vessel, with a third condenser installed at its top. The top inlet of the third condenser is connected to the top of the third reactor via a third exhaust pipe, and the bottom outlet of the third condenser is connected to a solvent recovery system via a third return pipe.
[0010] In one possible embodiment, the third reactor is further provided with a third temperature sensor, a third level gauge, and a third solenoid valve for controlling the entry of steam; the third temperature sensor is interlocked with the third solenoid valve, and the third level gauge is interlocked with the third material transfer pump.
[0011] In one possible implementation, the fourth reactor serves as a transfer vessel, and a fourth condenser is provided at the top of the fourth reactor. The top air inlet of the fourth condenser is connected to the top of the fourth reactor through a fourth exhaust pipe, and the bottom liquid outlet of the fourth condenser is connected to the solvent recovery system through a fourth return liquid pipe.
[0012] The fourth reactor is also equipped with a fourth temperature sensor, a fourth level gauge, and a fourth solenoid valve for controlling the entry of steam; the fourth temperature sensor is interlocked with the fourth solenoid valve, and the fourth level gauge is interlocked with the fourth material transfer pump.
[0013] In one feasible embodiment, the first, second, third, and fourth reactors are all jacketed reactors.
[0014] In one feasible embodiment, the stirring mechanism within the first, second, third, and fourth reactors is an anchor type, a frame type, a ribbon type, a propeller type, or a paddle type.
[0015] The continuous condensation production apparatus for ethyl α-cyanoacrylate provided by this utility model has the following advantages compared with the prior art: multiple reactors are connected in series, and different reactors perform different functions. The first reactor serves as a feeding reactor to initially stir and react the input materials; the second reactor serves as a material reaction reactor to further react the materials after the initial reaction, thereby improving the reaction effect; the third reactor serves as a solvent removal reactor, which can realize the recovery and reuse of the solvent; the fourth reactor serves as a transfer reactor, which provides automatic material transfer for the product; and the material transfer between two reactors is carried out by a material transfer pump to achieve continuous production of ethyl α-cyanoacrylate. By adopting this continuous production method, the production efficiency and equipment utilization rate can be greatly improved, and the production costs such as equipment wear and labor costs can be significantly reduced. Attached Figure Description
[0016] Figure 1 Process flow diagram of the α-cyanoacrylate continuous condensation production apparatus provided in this embodiment of the utility model;
[0017] Explanation of reference numerals in the attached figures:
[0018] 1. First reactor; 2. Second reactor; 3. Third reactor; 4. Fourth reactor; 5. First material transfer pump; 6. Second material transfer pump; 7. Third material transfer pump; 8. Fourth material transfer pump; 9. First solenoid valve; 10. Second solenoid valve; 11. Third solenoid valve; 12. Fourth solenoid valve; 13. First temperature sensor; 14. Second temperature sensor; 15. Third temperature sensor; 16. Fourth temperature sensor; 17. First condenser; 18. Second condenser; 19. Third condenser; 20. Fourth condenser; 21. Paraformaldehyde inlet; 22. Liquid material inlet; 23. First level gauge; 24. Second level gauge; 25. Third level gauge; 26. Fourth level gauge. Detailed Implementation
[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0020] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.
[0021] Please see Figure 1As shown, the continuous condensation production apparatus for ethyl α-cyanoacrylate provided by this utility model will now be described. The continuous condensation production apparatus for ethyl α-cyanoacrylate includes: a first reactor 1, a second reactor 2, a third reactor 3, and a fourth reactor 4 connected in series via pipelines; a first material transfer pump 5 is installed on the connecting pipeline between the first reactor 1 and the second reactor 2; a second material transfer pump 6 is installed on the connecting pipeline between the second reactor 2 and the third reactor 3; a third material transfer pump 7 is installed between the third reactor 3 and the fourth reactor 4; a fourth material transfer pump 8 is installed on the discharge pipeline of the fourth reactor 4; the first reactor 1 serves as a feeding vessel, and its top is also provided with a paraformaldehyde inlet 21 and a liquid material inlet 22.
[0022] The continuous condensation production apparatus for ethyl α-cyanoacrylate provided by this utility model has the following advantages compared with the prior art: multiple reactors are connected in series, and different reactors perform different functions. The first reactor 1 serves as a feeding reactor to initially stir and react the input materials; the second reactor 2 serves as a material reaction reactor to further react the materials after the initial reaction, thereby improving the reaction effect; the third reactor 3 serves as a solvent removal reactor, which can realize the recovery and reuse of the solvent; the fourth reactor 4 serves as a transfer reactor, which provides automatic material transfer for the product; the material transfer between the two reactors is carried out by a material transfer pump to realize the continuous production of ethyl α-cyanoacrylate. By adopting this continuous production method, the production efficiency and equipment utilization rate can be greatly improved, and the production costs such as equipment wear and labor costs can be significantly reduced.
[0023] In some embodiments, see Figure 1 A first condenser 17 is installed at the top of the first reactor 1. The top inlet of the first condenser 17 is connected to the top of the first reactor 1 through a first exhaust pipe, and the bottom outlet of the first condenser 17 is connected to the top of the first reactor 1 through a first return pipe. The bottom outlet of the first condenser 17 is connected to a tail gas treatment device through a first tail gas pipeline. The vapor generated by the reaction in the first reactor 1 enters the first condenser 17 through the first exhaust pipe. The liquid cooled by the first condenser 17 re-enters the first reactor 1 for reuse, while the tail gas enters the tail gas treatment device for treatment through the first tail gas pipeline.
[0024] In some embodiments, see Figure 1The first reactor 1 is also equipped with a first temperature sensor 13, a first level gauge 23, and a first solenoid valve 9 for controlling the entry of steam. The first temperature sensor 13 is interlocked with the first solenoid valve 9, and the first level gauge 23 is interlocked with the first material transfer pump 5. For example, when the first temperature sensor 13 detects that the temperature inside the first reactor 1 is lower than the preset reaction temperature, the PLC control system adjusts the corresponding first solenoid valve 9 to open, allowing steam to enter the jacket of the first reactor 1 and increasing the reaction temperature inside the first reactor 1. At the same time, when the temperature inside the first reactor 1 exceeds the preset maximum reaction temperature, the opening of the first solenoid valve 9 decreases or closes completely, reducing or eliminating the flow of high-temperature steam into the jacket of the first reactor 1, thus lowering the temperature inside the first reactor 1. When the first level gauge 23 on the first reactor 1 changes, the first level gauge 23 transmits an electrical signal to the PLC control system, which then sends a signal to adjust the flow rate of the corresponding first material transfer pump 5 to maintain the automatic adjustment of the liquid level inside the first reactor 1, ensuring that the liquid level inside the first reactor 1 does not exceed the maximum liquid level or fall below the minimum liquid level.
[0025] The working principles of the temperature sensors and level gauges installed on the other reactors are the same as those on the first reactor 1. The temperature and level adjustments of the corresponding reactors will not be described in detail.
[0026] In some embodiments, see Figure 1 The second reactor 2 serves as the material reaction vessel. A second condenser 18 is installed at the top of the second reactor 2. The top inlet of the second condenser 18 is connected to the top of the second reactor 2 via a second exhaust pipe, and the bottom outlet of the second condenser 18 is connected to the top of the second reactor 2 via a second return pipe. The bottom outlet of the second condenser 18 is connected to the exhaust gas treatment device via a second exhaust gas pipeline. The working principle and function of the second condenser 18 are the same as those of the first condenser 17. Further details are omitted here.
[0027] In some embodiments, see Figure 1 The second reactor 2 is also equipped with a second temperature sensor 14, a second level gauge 24, and a second solenoid valve 10 for controlling the entry of steam; the second temperature sensor 14 is interlocked with the second solenoid valve 10, and the second level gauge 24 is interlocked with the second material transfer pump 6.
[0028] It should be noted that the maximum and minimum reaction temperatures in each reactor can vary depending on the reaction temperature of the initial or intermediate materials in each reactor.
[0029] In some embodiments, see Figure 1The third reaction vessel 3 serves as a solvent removal vessel. A third condenser 19 is installed at the top of the third reaction vessel 3. The top inlet of the third condenser 19 is connected to the top of the third reaction vessel 3 via a third exhaust pipe, and the bottom outlet of the third condenser 19 is connected to the solvent recovery system via a third return pipe. The condensers installed on the third reaction vessel 3 and the fourth reaction vessel 4 are primarily for the recovery and reuse of the removed solvent.
[0030] In some embodiments, see Figure 1 The third reactor 3 is also equipped with a third temperature sensor 15, a third level gauge 25, and a third solenoid valve 11 for controlling the entry of steam; the third temperature sensor 15 is interlocked with the third solenoid valve 11, and the third level gauge 25 is interlocked with the third material transfer pump 7.
[0031] In some embodiments, see Figure 1 The fourth reactor 4 serves as a transfer vessel. A fourth condenser 20 is installed at the top of the fourth reactor 4. The top air inlet of the fourth condenser 20 is connected to the top of the fourth reactor 4 through a fourth exhaust pipe. The bottom liquid outlet of the fourth condenser 20 is connected to the solvent recovery system through a fourth return liquid pipe. The fourth reactor 4 is also equipped with a fourth temperature sensor 16, a fourth liquid level gauge 26, and a fourth solenoid valve 12 for controlling the entry of steam. The fourth temperature sensor 16 is interlocked with the fourth solenoid valve 12, and the fourth liquid level gauge 26 is interlocked with the fourth material transfer pump 8.
[0032] Each reactor in this invention is equipped with a temperature sensor, a level gauge, and a solenoid valve. The entire device is controlled by a PLC system. During the continuous production process of ethyl α-cyanoacrylate condensation, when the temperature changes during the reaction, the temperature sensor transmits a signal to the PLC control system. The PLC control system then sends a signal to adjust the corresponding steam solenoid valve. For example, when the temperature sensor detects that the temperature inside the reactor is lower than the preset reaction temperature, the PLC control system opens the corresponding solenoid valve, allowing steam to enter the reactor jacket and raise the temperature inside the reactor. Conversely, when the temperature inside the reactor exceeds the preset maximum reaction temperature, the solenoid valve... If the opening degree is reduced or completely closed, reducing or eliminating the flow of high-temperature steam into the jacket of the reactor, the temperature inside the reactor will decrease. When the level gauge on the reactor changes, it transmits an electrical signal to the PLC control system. The PLC control system then sends a signal to adjust the flow rate of the corresponding material transfer pump, maintaining the automatic adjustment of the liquid level inside the reactor. The liquid level inside the reactor will not exceed the maximum level or fall below the minimum level. Through the interlocking of the temperature sensor and the solenoid valve, as well as the interlocking of the level gauge and the transfer pump, the safety and reliability of the reaction process are ensured. This also improves production efficiency, enhances process safety, and saves labor costs, resulting in good economic benefits.
[0033] In some embodiments, see Figure 1The first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 are all jacketed reactors. Each solenoid valve is connected to the jacket of the reactor, allowing high-temperature steam to flow within the jacket and regulate the reaction temperature inside the reactor.
[0034] In some embodiments, see Figure 1 The stirring mechanisms in the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 are anchor type, frame type, ribbon type, propeller type, or paddle type.
[0035] To explain, the stirring mechanism agitates the materials inside the reactor, making the materials uniform and improving reaction efficiency. Specifically, the stirring paddle in an anchor-type stirring mechanism is an anchor-type stirring paddle; the stirring paddle in a ribbon-type stirring mechanism is a spiral-type stirring paddle; the stirring paddle in a paddle-type stirring mechanism is a paddle-type stirring paddle; and the stirring paddle in a frame-type stirring mechanism is a frame-type stirring paddle. These are all commonly used stirrers, mainly referring to differences in the structure of the stirring paddle; the stirring paddle in a stirring mechanism can also be a propeller-type stirring paddle.
[0036] The following is a continuous production embodiment based on the production apparatus provided in this application:
[0037] Application Example 1
[0038] Solid formaldehyde and ethyl cyanoacetate (containing dichloroethane, DOP, and piperidine) are added to the first reactor in a specific ratio. Once the preset liquid level is reached, the material is sequentially transferred to the second, third, and fourth reactors via a transfer pump. After steady-state operation, only a mixed solution of paraformaldehyde and ethyl cyanoacetate needs to be added in the specified ratio. Each reactor has a volume of 5000L, operates at atmospheric pressure, uses a paddle agitator, and employs jacketed temperature control. The material processing capacity is 1000 kg / h.
[0039] Application Example 2
[0040] The difference from Example 1 is that a single reactor is used for feeding, and the material processing capacity of the four reactors is 600 kg / h.
[0041] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A continuous condensation production apparatus for ethyl α-cyanoacrylate, characterized in that, include: A first reactor (1), a second reactor (2), a third reactor (3), and a fourth reactor (4) are connected in series via pipelines. A first material transfer pump (5) is installed on the connecting pipeline between the first reactor (1) and the second reactor (2). A second material transfer pump (6) is installed on the connecting pipeline between the second reactor (2) and the third reactor (3). A third material transfer pump (7) is installed between the third reactor (3) and the fourth reactor (4). A fourth material transfer pump (8) is installed on the discharge pipeline of the fourth reactor (4). The first reactor (1) serves as a feeding vessel. The top of the first reactor (1) is also provided with a paraformaldehyde inlet (21) and a liquid material inlet (22).
2. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 1, characterized in that, The first reactor (1) is provided with a first condenser (17) at the top. The top air inlet of the first condenser (17) is connected to the top of the first reactor (1) through a first exhaust pipe. The bottom liquid outlet of the first condenser (17) is connected to the top of the first reactor (1) through a first return liquid pipe. The bottom tail gas outlet of the first condenser (17) is connected to the tail gas treatment device through a first tail gas pipeline.
3. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 2, characterized in that, The first reactor (1) is also equipped with a first temperature sensor (13), a first level gauge (23) and a first solenoid valve (9) for controlling the entry of steam; the first temperature sensor (13) is interlocked with the first solenoid valve (9) and the first level gauge (23) is interlocked with the first material transfer pump (5).
4. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 2, characterized in that, The second reactor (2) serves as a material reactor. A second condenser (18) is provided at the top of the second reactor (2). The top air inlet of the second condenser (18) is connected to the top of the second reactor (2) through a second exhaust pipe. The bottom liquid outlet of the second condenser (18) is connected to the top of the second reactor (2) through a second return liquid pipe. The bottom tail gas outlet of the second condenser (18) is connected to the tail gas treatment device through a second tail gas pipeline.
5. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 4, characterized in that, The second reactor (2) is also equipped with a second temperature sensor (14), a second level gauge (24) and a second solenoid valve (10) for controlling the entry of steam; the second temperature sensor (14) is interlocked with the second solenoid valve (10), and the second level gauge (24) is interlocked with the second material transfer pump (6).
6. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 1, characterized in that, The third reaction vessel (3) serves as a solvent removal vessel. A third condenser (19) is installed at the top of the third reaction vessel (3). The top air inlet of the third condenser (19) is connected to the top of the third reaction vessel (3) through a third exhaust pipe. The bottom liquid outlet of the third condenser (19) is connected to the solvent recovery system through a third return liquid pipe.
7. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 6, characterized in that, The third reactor (3) is also equipped with a third temperature sensor (15), a third level gauge (25), and a third solenoid valve (11) for controlling the entry of steam; the third temperature sensor (15) is interlocked with the third solenoid valve (11), and the third level gauge (25) is interlocked with the third material transfer pump (7).
8. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 1, characterized in that, The fourth reactor (4) serves as a transfer vessel. A fourth condenser (20) is installed at the top of the fourth reactor (4). The top air inlet of the fourth condenser (20) is connected to the top of the fourth reactor (4) through a fourth exhaust pipe. The bottom liquid outlet of the fourth condenser (20) is connected to the solvent recovery system through a fourth return liquid pipe. The fourth reactor (4) is also equipped with a fourth temperature sensor (16), a fourth level gauge (26), and a fourth solenoid valve (12) for controlling the entry of steam; the fourth temperature sensor (16) is interlocked with the fourth solenoid valve (12), and the fourth level gauge (26) is interlocked with the fourth material transfer pump (8).
9. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 1, characterized in that, The first reactor (1), the second reactor (2), the third reactor (3) and the fourth reactor (4) are all jacketed reactors.
10. The continuous condensation production apparatus for ethyl α-cyanoacrylate as described in claim 1, characterized in that, The stirring mechanisms in the first reactor (1), the second reactor (2), the third reactor (3), and the fourth reactor (4) are anchor type, frame type, ribbon type, propeller type, or paddle type.