A preheating type heating mechanism of a triphenyl phosphite synthesis reaction kettle and a use method thereof

Abstract

The application discloses a preheating type heating mechanism of a triphenyl phosphite synthesis reaction kettle and a use method thereof, which comprises a heating mechanism capable of heating and circulating liquid, and communication mechanisms are arranged at liquid output and input ends of the heating mechanism; the communication mechanisms comprise two plug-in blocks capable of reciprocating upward and downward or leftward and rightward; a furnace wall is in a cavity shape, the outer wall of the reaction furnace is provided with plug-in grooves in a linear array, the whole is heated by using a water bath heating method, temperature control is more accurate, and the whole can realize connection and separation with a heat source under the action of the plug-in blocks and the plug-in grooves, so that the reaction furnace is separated from the heat source when cooling is needed, the heat source continues to keep a heating state, and the reaction furnace can be cooled, the whole is in two states and does not interfere with each other, when combination is needed, heating can be directly carried out without preheating, preheating time is reduced, and reaction efficiency is increased, and therefore, the whole can be widely applied to the synthesis of triphenyl phosphite.

Description

Technical Field

[0001] This invention relates to a preheating heating mechanism for a triphenyl phosphite synthesis reactor and its usage method. Background Technology

[0002] In the synthesis of triphenyl phosphite, the direct phosphorus oxychloride method (also known as the thermal method) is usually used. Phenol is used with pyridine and anhydrous benzene as solvents, and phosphorus oxychloride is slowly added. The reaction is carried out at reflux temperature. After cooling to room temperature, the reactants are washed with water, filtered, dehydrated, distilled at atmospheric pressure, and finally distilled under reduced pressure. After cooling, crystallization, and pulverization, the finished product is obtained.

[0003] The synthesis process involves heating and cooling. However, existing reactors treat heating and natural cooling as two separate processes. Heating is performed when heating is needed and stopped when cooling is needed. When heating is needed again, it needs to be restarted. Since the synthesis of triphenyl phosphite uses water bath heating as the most stable heating method, preheating is required, which further reduces the overall production efficiency. Therefore, there is an urgent need for a preheating mechanism that can also preheat during cooling. Summary of the Invention

[0004] The purpose of this invention is to provide a preheating heating mechanism for a triphenyl phosphite synthesis reactor and its usage method, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including,

[0006] A heating mechanism capable of heating and circulating liquid, wherein both the liquid output and input ends of the heating mechanism are provided with a connecting mechanism;

[0007] The connecting mechanism includes two plug-in blocks that can move back and forth up and down or left and right respectively.

[0008] The reactor has a cavity-shaped furnace wall. The outer wall of the reactor is provided with insertion slots in a linear array. The insertion block can be inserted into the insertion slot to complete the heating action into the reactor cavity.

[0009] The end of the connector block away from the connector slot is provided with a corrugated pipe.

[0010] Preferably, the insertion slot has multiple spring rods arranged in a circular array inside, the spring rods have plugs on their outer periphery, and the insertion block has a T-shaped liquid outlet groove inside.

[0011] Preferably, the heating mechanism includes a heater, and both the liquid output and input ends of the heater are provided with extension pipes. A circulation pump is provided at the position where the extension pipe connects to the heater at the liquid output end of the heater, and the corrugated pipe is provided on the extension pipe.

[0012] Preferably, it also includes a shell, the reactor is disposed on the shell, a guide plate is disposed inside the shell at a position on the outer periphery of the extension tube, a fixing ring is disposed inside the guide plate near the outer periphery of the extension tube, and the plug block is disposed on the fixing ring.

[0013] Preferably, an electric actuator is provided inside the guide plate, and the fixing ring is located at the power output end of the electric actuator.

[0014] Preferably, the plug has multiple outlets arranged in a circumferential array, and the maximum outer diameter of the plug is smaller than the inner diameter of the insertion groove.

[0015] Preferably, a solenoid valve is provided at the connection point between the two plug blocks and the bellows.

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

[0017] The entire system employs a water bath heating method, resulting in more precise temperature control. Furthermore, the system can connect to and separate from the heat source via plug-in blocks and slots. This allows the reactor to separate from the heat source when cooling is required, while the heat source continues to heat and the reactor can cool. The system exists in two independent states without interference. When bonding is needed, preheating is not required, thus reducing preheating time and increasing reaction efficiency. Therefore, the system is widely applicable to the synthesis of triphenyl phosphite. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the insertion slot according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the plug block according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the surface structure of the electric actuator according to an embodiment of the present invention.

[0023] In the diagram: 1. Shell; 201. Insertion block; 202. Insertion groove; 204. Spring rod; 205. Plug; 206. T-shaped liquid outlet groove; 3. Reactor; 401. Heater; 402. Extension tube; 403. Circulation pump; 5. Guide plate; 6. Fixing ring; 7. Electric actuator; 8. Water outlet; 9. Solenoid valve. Detailed Implementation

[0024] To address the problem of reduced synthesis efficiency caused by preheating in existing methods, this invention provides a preheating heating mechanism for a triphenyl phosphite synthesis reactor and its usage method. The technical solution of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described invention is only a part of this invention, not all of it. All other inventions obtained by those skilled in the art based on this invention without inventive effort are within the scope of protection of this invention.

[0025] Please see Figure 1-5 This invention provides a preheating heating mechanism for a triphenyl phosphite synthesis reactor, comprising:

[0026] A heating mechanism capable of heating and circulating liquid, wherein both the liquid output and input ends of the heating mechanism are provided with a connecting mechanism;

[0027] The connecting mechanism includes two plug-in blocks 201 that can reciprocate up and down or left and right respectively;

[0028] The reactor 3 has a cavity-shaped furnace wall. The outer wall of the reactor is provided with insertion slots 202 arranged in a linear array. The insertion block 201 can be inserted into the insertion slot 202 to complete the heating action into the reactor cavity.

[0029] The end of the plug block 201 away from the plug slot 202 is provided with a corrugated pipe.

[0030] Specifically, the insertion slot 202 has multiple spring rods 204 arranged in a circular array inside, and plugs 205 are provided on the outer periphery of the spring rods 204. The insertion block 201 has a T-shaped liquid outlet groove 206 inside. With the help of the multiple spring rods 204, the plugs 205 tend to return to their original position. In this way, during the process of the insertion block 201 disengaging, the plugs 205 will adhere to the surface of the insertion block 201 under the action of the spring rods 204 and move with it until it is completely disengaged. After that, the plugs 205 will also seal the insertion slot 202, and liquid will be input into the insertion slot 202 from the side through the T-shaped liquid outlet groove 206, avoiding the inability of liquid to be output due to the blockage of the plugs 205.

[0031] Specifically, the heating mechanism includes a heater 401, with extension pipes 402 at both the liquid output and input ends of the heater 401. A circulation pump 403 is installed at the connection point between the extension pipe 402 and the heater 401 at the liquid output end of the heater 401, and a corrugated pipe is installed on the extension pipe 402. The heater 401 heats the liquid, and the circulation pump 403 allows the liquid heated by the heater 401 to circulate within the furnace wall of the reactor 3.

[0032] Specifically, it also includes a shell 1, on which the reactor 3 is mounted. Inside the shell 1, a guide plate 5 is located on the outer periphery of the extension tube 402. Inside the guide plate 5, near the outer periphery of the extension tube 402, a fixing ring 6 is located. The insertion block 201 is mounted on the fixing ring 6. The guide plate 5 restricts the movement path of the fixing ring 6, allowing the fixing ring 6 to drive the insertion block 201 to move along a preset route, thereby accurately inserting the insertion block 201 into the insertion slot 202.

[0033] Specifically, the guide plate 5 is equipped with an electric push rod 7, and the fixing ring 6 is located at the power output end of the electric push rod 7; the electric push rod 7 drives the fixing ring 6 to move.

[0034] Specifically, the plug 205 has multiple outlets 8 arranged in a circumferential array, and the maximum outer diameter of the plug 205 is smaller than the inner diameter of the insertion groove 202. In this way, the outlets 8 facilitate the entry of liquid into the furnace wall of the reactor 3, and the smaller outer diameter of the plug 205 provides space for the liquid to exit.

[0035] Specifically, each of the two plug-in blocks 201 is equipped with a solenoid valve 9 at the connection point with the bellows; the solenoid valve 9 can be used to block the plug-in block 201.

[0036] A method for using a preheating heating mechanism for a triphenyl phosphite synthesis reactor includes the following steps:

[0037] Step A, Preheating: Start heater 401 to heat the liquid inside until it reaches the preset temperature.

[0038] Step B, Connection: When a reaction is required, activate the two electric actuators 7. The electric actuators 7 drive the plug block 201 to be inserted into the plug slot 202. During the insertion process, the surface of the plug block 201 will squeeze the plug 205, thereby causing it to detach from the surface of the plug slot 202 and destroy its own sealing structure until the plug block 201 is fully inserted and blocks the notch of the plug slot 202.

[0039] Step C, Heating Reaction: Start the circulation pump 403. The circulation pump 403 drives the hot water through the T-shaped liquid outlet trough 206 into the insertion groove 202, and then allows the hot water to enter the furnace wall of the reactor 3. The furnace wall is continuously heated by the hot water in the thermal circulation until the reaction temperature is reached in the reactor 3. Add the raw materials required for the synthesis of triphenyl phosphite to carry out the reaction.

[0040] Step D, Cooling: After the reaction is complete, close the solenoid valve 9 and reverse the electric actuator 7. The electric actuator 7 drives the plug block 201 to disengage from the plug slot 202. During the disengagement process, under the action of the spring rod 204, the plug 205 will adhere to the surface of the plug block 201 and move accordingly until it is completely disengaged. After that, the plug 205 will also seal the plug slot 202. The reactants in the reactor 3 are cooled, and the liquid in the heater 401 is continuously heated to maintain the preset temperature.

[0041] Step E: After the reaction is complete, the reactants in reactor 3 are processed, and the above method can be repeated for a secondary reaction.

[0042] The preheating heating mechanism for a triphenyl phosphite synthesis reactor and its usage method of the present invention have the following advantages:

[0043] The entire system employs a water bath heating method for more precise temperature control. Furthermore, the system can be connected to and separated from the heat source through the insertion block 201 and insertion slot 202. This allows the reactor 3 to separate from the heat source when cooling is required, while the heat source continues to heat and the reactor 3 can be cooled. The system exists in two states without interfering with each other. When bonding is required, preheating is not necessary, and heating can proceed directly, reducing preheating time and increasing reaction efficiency. Therefore, the system is widely applicable to the synthesis of triphenyl phosphite.

[0044] Although the invention has been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these inventions without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating heating mechanism for a triphenyl phosphite synthesis reactor, characterized in that: include, A heating mechanism capable of heating and circulating liquid, wherein both the liquid output and input ends of the heating mechanism are provided with a connecting mechanism; The connecting mechanism includes two plug-in blocks (201) that can move back and forth up and down or left and right respectively. The reactor (3) has a cavity-shaped furnace wall. The outer wall of the reactor is provided with insertion slots (202) in a linear array. The insertion block (201) can be inserted into the insertion slot (202) to complete the heating action into the reactor cavity. A corrugated pipe is provided at the end of the plug block (201) away from the plug slot (202); The insertion slot (202) has multiple spring rods (204) arranged in a circular array inside, and the spring rods (204) have plugs (205) on their outer periphery. The insertion block (201) has a T-shaped liquid outlet groove (206) inside. The heating mechanism includes a heater (401), and both the liquid output and input ends of the heater (401) are provided with extension tubes (402). A circulation pump (403) is provided at the connection position between the extension tube (402) and the heater (401) on the liquid output end of the heater (401). The corrugated pipe is provided on the extension tube (402). It also includes a shell (1), the reactor (3) is disposed on the shell (1), a guide plate (5) is disposed inside the shell (1) at the outer periphery of the extension tube (402), a fixing ring (6) is disposed inside the guide plate (5) near the outer periphery of the extension tube (402), and the plug block (201) is disposed on the fixing ring (6); The guide plate (5) is equipped with an electric push rod (7), and the fixing ring (6) is located at the power output end of the electric push rod (7).

2. The preheating heating mechanism for a triphenyl phosphite synthesis reactor according to claim 1, characterized in that: The plug (205) has multiple outlets (8) arranged in a circular array, and the maximum outer diameter of the plug (205) is smaller than the inner diameter of the insertion groove (202).

3. The preheating heating mechanism for a triphenyl phosphite synthesis reactor according to claim 1, characterized in that: Solenoid valves (9) are provided at the connection points between the two plug blocks (201) and the bellows.

4. A method for using a preheating heating mechanism for a triphenyl phosphite synthesis reactor according to any one of claims 1-3, characterized in that: Includes the following steps: Step (A), Preheating: Start the heater (401) to heat the liquid inside until it reaches the preset temperature. Step (B), Connection: When a reaction is required, activate two electric actuators (7). The electric actuators (7) drive the plug block (201) to insert into the plug slot (202). During the insertion process, the surface of the plug block (201) will squeeze the plug (205), thereby causing it to detach from the surface of the plug slot (202) and destroy its own sealing structure until the plug block (201) is fully inserted and blocks the notch of the plug slot (202). Step (C), heating reaction: Start the circulation pump (403), the circulation pump (403) drives the hot water through the T-shaped liquid outlet tank (206) into the insertion tank (202), and then let the hot water into the furnace wall of the reactor (3). The furnace wall is continuously heated by the hot water in the heat circulation until the reaction temperature is reached in the reactor (3). Add the raw materials required for the synthesis of triphenyl phosphite to carry out the reaction. Step (D), Cooling: After the reaction is complete, close the solenoid valve (9) and start the electric push rod (7) in reverse. The electric push rod (7) drives the plug block (201) to disengage from the plug slot (202). During the disengagement process, under the action of the spring rod (204), the plug (205) will adhere to the surface of the plug block (201) and move accordingly until it is completely disengaged. After that, the plug (205) will also seal the plug slot (202). The reactants in the reactor (3) are cooled, and the liquid in the heater (401) is continuously heated to maintain the preset temperature. After step (E) is completed, the reactants in the reactor (3) are processed, and the above method can be repeated for a second reaction.

Images