Continuous device for reduction reaction

Abstract

The utility model relates to the technical field of chemical industry, in particular to a continuous device for reduction reaction, which is characterized in that one side of a tank body is communicated with a second connecting pipe, one end of the second connecting pipe is communicated with a continuous reduction mechanism, the other side of the tank body is communicated with a third connecting pipe, one end of the third connecting pipe is communicated with a precipitation tank, and the bottom end of one side of the tank body is connected with a low liquid level sensor; and the upper end of one side of the tank body is connected with a high liquid level sensor. Reaction liquid is buffered through the tank body, hydrogen in the reaction liquid in the tank body is released from the discharge pipe, when the liquid level cover in the tank body is higher than the high liquid level sensor, the second electromagnetic valve is closed, the third electromagnetic valve is opened, and when the liquid level of the reaction liquid in the tank body is located at the position of the low liquid level sensor, the third electromagnetic valve is closed. The third electromagnetic valve is closed, the second electromagnetic valve is opened, and the tank body buffers the reaction liquid, so that hydrogen in the reaction liquid is released from the discharge pipe and is prevented from entering the precipitation tank, and the precipitation of an intermediate is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a continuous process device for reduction reactions. Background Technology

[0002] In chemical production processes, especially in the synthesis of organic molecules, multiple intermediates are synthesized from basic raw materials through stepwise reactions. The purity and yield of a single intermediate significantly affect the purity and yield of the final product. This is particularly important for pharmaceutical products used for treatment, where the purity of the final product is especially crucial. Pharmaceutical intermediates refer to intermediate compounds used in the pharmaceutical industry to synthesize drugs. They are typically transformed into the final drug product through a series of chemical reactions.

[0003] In the chemical production of pharmaceutical intermediates, continuous equipment is required for reduction reactions. Some raw materials are reduced using hydrogen as a reducing agent. The reaction liquid after reduction is introduced into a precipitation tank, which contains hydrogen, thus affecting the precipitation of intermediates. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where the reaction liquid after the reduction reaction is introduced into the precipitation tank, and the reaction liquid in the precipitation tank contains hydrogen gas, which affects the precipitation of intermediates. The invention proposes a continuous reduction reaction device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a continuous reduction reaction device, including a continuous reduction mechanism, a feed pipe connected to the continuous reduction mechanism, a hydrogen conduit connected to the continuous reduction mechanism, a degassing mechanism connected to one side of the continuous reduction mechanism, and a precipitation tank connected to the degassing mechanism.

[0007] The degassing mechanism includes a tank body. One side of the tank body is connected to a second connecting pipe, one end of which is connected to the continuous reduction mechanism. A second solenoid valve is connected to the second connecting pipe. The other side of the tank body is connected to a third connecting pipe, one end of which is connected to the precipitation tank. A third solenoid valve is connected to the third connecting pipe. A low-level liquid level sensor is connected to the bottom of one side of the tank body, and a high-level liquid level sensor is connected to the top of one side of the tank body. A discharge pipe is connected to the top of the tank body.

[0008] Preferably, the continuous reduction mechanism includes a plurality of reaction vessels, which are connected to each other by a first connecting pipe. Each first connecting pipe is connected to a first solenoid valve. One of the reaction vessels is connected to the feed pipe, and another reaction vessel is connected to the second connecting pipe. The upper end of each reaction vessel is connected to the hydrogen conduit.

[0009] Preferably, each of the reaction vessels is connected to a pressure detector.

[0010] Preferably, the precipitation tank is connected to a stirring mechanism, which includes a motor. The motor is fixedly connected to the upper end of the precipitation tank, and the output end of the motor extends into the precipitation tank and is fixedly connected to a stirring element.

[0011] Preferably, the stirring element is coated with an anti-corrosion layer.

[0012] Preferably, the tank body is connected to an air bubble elimination mechanism, which includes two parallel fixed rings. The two parallel fixed rings are fixedly connected to the tank body, and a filter screen is fixedly connected between the two fixed rings.

[0013] The continuous reduction reaction apparatus proposed in this invention has the following advantages:

[0014] The reaction liquid is buffered by the tank. Hydrogen in the reaction liquid inside the tank is released from the discharge pipe. When the liquid level in the tank exceeds the high-level liquid level sensor, the second solenoid valve is closed and the third solenoid valve is opened. When the liquid level in the tank is at the low-level liquid level sensor position, the third solenoid valve is closed and the second solenoid valve is opened. The tank buffers the reaction liquid, allowing hydrogen in the reaction liquid to be released from the discharge pipe, preventing hydrogen from entering the precipitation tank and thus not affecting the precipitation of the intermediate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the continuous reduction reaction apparatus proposed in this utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the continuous reduction reaction apparatus proposed in this utility model. Figure 2 ;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of the continuous reduction reaction apparatus proposed in this utility model;

[0018] Figure 4 This is a schematic diagram showing the connection between the degassing mechanism and the bubble elimination mechanism in the continuous reduction reaction apparatus proposed in this utility model.

[0019] In the diagram: 1. Continuous reduction mechanism; 2. Feed pipe; 3. Hydrogen conduit; 4. Degassing mechanism; 5. Precipitation tank; 6. Stirring mechanism; 7. Bubble elimination mechanism; 11. Reaction tank; 12. First connecting pipe; 13. First solenoid valve; 14. Pressure detector; 41. Tank body; 42. Second connecting pipe; 43. Second solenoid valve; 44. Third connecting pipe; 45. Third solenoid valve; 46. Low-level liquid level sensor; 47. High-level liquid level sensor; 48. Discharge pipe; 61. Motor; 62. Stirring component; 71. Fixing ring; 72. Filter screen. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1: Refer to Figure 1-4 The continuous reduction reaction apparatus includes a continuous reduction mechanism 1, a feed pipe 2 connected to the continuous reduction mechanism 1, a hydrogen conduit 3 connected to the continuous reduction mechanism 1, a degassing mechanism 4 connected to one side of the continuous reduction mechanism 1, and a precipitation tank 5 connected to the degassing mechanism 4.

[0022] The degassing mechanism 4 includes a tank 41. One side of the tank 41 is connected to a second connecting pipe 42. One end of the second connecting pipe 42 is connected to the continuous reduction mechanism 1. A second solenoid valve 43 is connected to the second connecting pipe 42. The other side of the tank 41 is connected to a third connecting pipe 44. One end of the third connecting pipe 44 is connected to the precipitation tank 5. A third solenoid valve 45 is connected to the third connecting pipe 44. A low-level liquid level sensor 46 is connected to the bottom of one side of the tank 41. A high-level liquid level sensor 47 is connected to the upper end of one side of the tank 41. A discharge pipe 48 is connected to the upper end of the tank 41.

[0023] Work process:

[0024] During the reduction reaction, the raw material is introduced into the continuous reduction mechanism 1 through the feed pipe 2, and hydrogen is introduced into the continuous reduction mechanism 1 through the hydrogen conduit 3. After the hydrogen comes into contact with the raw material, it undergoes a reduction reaction. After the reduction reaction is completed, the second solenoid valve 43 is opened, and the reaction liquid in the continuous reduction mechanism 1 is introduced into the tank 41 through the second connecting pipe 42.

[0025] The liquid level in tank 41 gradually rises, and tank 41 buffers the reaction liquid. Hydrogen in the reaction liquid in tank 41 is released from the discharge pipe 48. When the liquid level in tank 41 exceeds the high-level liquid level sensor 47, the second solenoid valve 43 is closed and the third solenoid valve 45 is opened. The reaction liquid in tank 41 is introduced into the precipitation tank 5 through the third connecting pipe 44 for extraction and precipitation. When the liquid level in tank 41 is at the position of the low-level liquid level sensor 46, the third solenoid valve 45 is closed and the second solenoid valve 43 is opened. The reaction liquid is buffered by tank 41, so that the hydrogen in the reaction liquid is released from the discharge pipe 48, preventing hydrogen from entering the precipitation tank 5 and thus not affecting the precipitation of the intermediate.

[0026] Example 2: In Example 1, during the reaction of the raw materials with hydrogen, it was inconvenient to control the pressure within the continuous reduction mechanism 1. (Refer to...) Figure 2-3 As another preferred embodiment of this utility model, the difference from embodiment 1 is that the continuous reduction mechanism 1 includes a plurality of reaction tanks 11, which are connected to each other by a first connecting pipe 12. Each first connecting pipe 12 is connected to a first solenoid valve 13, and each reaction tank 11 is connected to a pressure detector 14. One reaction tank 11 is connected to a feed pipe 2, and another reaction tank 11 is connected to a second connecting pipe 42. The upper end of each reaction tank 11 is connected to a hydrogen conduit 3. The raw material is introduced into the reaction tank 11 through the feed pipe 2, and hydrogen is introduced into the reaction tank 11 through the hydrogen conduit 3. The pressure detector 14 detects the pressure inside the reaction tank 11, which facilitates the control of the pressure inside the reaction tank 11.

[0027] Example 3: In Example 1, during the intermediate extraction and precipitation in the precipitation tank 5, the precipitation rate was slow, referring to... Figure 3 As another preferred embodiment of this utility model, the difference from embodiment 1 is that a stirring mechanism 6 is connected to the precipitation tank 5. The stirring mechanism 6 includes a motor 61, which is fixedly connected to the upper end of the precipitation tank 5. The output end of the motor 61 extends into the precipitation tank 5 and is fixedly connected to a stirring element 62. The stirring element 62 is coated with an anti-corrosion layer. When crystallization occurs, the motor 61 is energized and started. After the motor 61 starts, it drives the stirring element 62 to rotate. After the stirring element 62 rotates, it stirs the reaction liquid in the precipitation tank 5, thereby accelerating the extraction and precipitation speed.

[0028] Example 4: In Example 1, when the reaction liquid is buffered in tank 41, the bubbles in the reaction liquid cannot be processed quickly, thus reducing the processing speed of hydrogen in the reaction liquid. (Refer to...) Figure 4As another preferred embodiment of this utility model, the difference from embodiment 1 is that a bubble elimination mechanism 7 is connected inside the tank 41. The bubble elimination mechanism 7 includes two parallel fixed rings 71, which are fixedly connected to the inside of the tank 41. A filter screen 72 is fixedly connected between the two fixed rings 71. The two fixed rings 71 fix the filter screen 72. The reaction liquid entering the tank 41 comes into contact with the filter screen 72, and the bubbles in the reaction liquid come into contact with the filter screen 72. The bubbles burst, causing the gas in the bubbles to move upward rapidly and be released quickly from the discharge pipe 48. This facilitates the treatment of bubbles in the reaction liquid and improves the processing speed of hydrogen in the reaction liquid.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous device for reduction reactions, characterized in that, Includes a continuous reduction mechanism (1), wherein: The continuous reduction mechanism (1) is connected to a feed pipe (2), the continuous reduction mechanism (1) is connected to a hydrogen conduit (3), one side of the continuous reduction mechanism (1) is connected to a degassing mechanism (4), and the degassing mechanism (4) is connected to a precipitation tank (5). The degassing mechanism (4) includes a tank (41), one side of which is connected to a second connecting pipe (42), one end of which is connected to the continuous reduction mechanism (1), and a second solenoid valve (43) is connected to the second connecting pipe (42). The other side of the tank (41) is connected to a third connecting pipe (44), one end of which is connected to the precipitation tank (5), and a third solenoid valve (45) is connected to the third connecting pipe (44). A low-level liquid level sensor (46) is connected to the bottom of one side of the tank (41), a high-level liquid level sensor (47) is connected to the upper side of one side of the tank (41), and a discharge pipe (48) is connected to the upper end of the tank (41).

2. The apparatus for continuous reduction reaction according to claim 1, wherein The continuous reduction mechanism (1) includes a plurality of reaction vessels (11), which are connected to each other by a first connecting pipe (12). Each first connecting pipe (12) is connected to a first solenoid valve (13). One of the reaction vessels (11) is connected to the feed pipe (2), and one of the reaction vessels (11) is connected to the second connecting pipe (42). The upper end of each of the reaction vessels (11) is connected to the hydrogen conduit (3).

3. The apparatus for continuous reduction reaction according to claim 2, wherein Each of the reaction vessels (11) is connected to a pressure detector (14).

4. The apparatus for continuous reduction reaction according to claim 1, wherein The precipitation tank (5) is connected to a stirring mechanism (6), which includes a motor (61). The motor (61) is fixedly connected to the upper end of the precipitation tank (5), and the output end of the motor (61) extends into the precipitation tank (5) and is fixedly connected to a stirring element (62).

5. The apparatus for continuous reduction reaction according to claim 4, wherein The agitator (62) is coated with an anti-corrosion layer.

6. The apparatus for continuous reduction reaction according to claim 1, wherein The tank (41) is connected to a bubble elimination mechanism (7), which includes two parallel fixed rings (71). The two parallel fixed rings (71) are fixedly connected to the tank (41), and a filter screen (72) is fixedly connected between the two fixed rings (71).

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