Mixed contact reaction device for preparing catechol from phenol

Abstract

The utility model discloses a mixed contact reaction device for preparing catechol from phenol, which comprises a reaction kettle, a ventilation component is mounted in the reaction kettle, the ventilation component comprises an air inlet pipe rotatably connected in the reaction kettle, one end of the top of the air inlet pipe extends out of the reaction kettle, and the other end of the top of the air inlet pipe extends out of the reaction kettle. Two sprayers are fixedly inserted into the bottom of the outer wall of the circumference of the air inlet pipe, a plurality of nozzles are arranged on the outer walls of the two ends of the two sprayers, a one-way valve is arranged in each nozzle, the top of the outer wall of the circumference of the air inlet pipe is fixedly sleeved with a gear ring, and a supporting frame is fixedly connected to the outer wall of the top of the reaction kettle; a motor is fixedly installed on the outer wall of the top of the supporting frame, and a gear is coaxially fixed to a rotating shaft of the motor. By arranging the ventilation assembly, the spray head for introducing oxygen can continuously rotate in the reaction kettle, so that it is guaranteed that all phenol raw materials in the reaction kettle can make contact with the oxygen in time, and the reaction efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of catechol, in particular to a mixed contact reaction device for preparing catechol from phenol. Background Art

[0002] The methods for preparing catechol mainly include two methods: using biomimetic catalytic oxygen to oxidize phenol and hydroxylating phenol to prepare hydroquinone and catechol.

[0003] Method for preparing catechol by biomimetic catalytic oxygen oxidation of phenol: This method uses metal porphyrin compounds with similar structures to biological enzymes as catalysts, and the amount of catalyst used is 0.15-0.8% of the weight of phenol. The reaction is carried out under normal pressure, oxygen is introduced, the reaction temperature is controlled at 40-80°C, and the reaction time is 2-10 hours.

[0004] The oxygen outlet position is generally fixed, and its outlet is set in the middle position of the bottom of the reactor. Therefore, phenol in other positions cannot contact oxygen in time. It takes a long time to make phenol react completely, and there is room for improvement. Utility Model Content

[0005] The utility model aims to provide a mixed contact reaction device for preparing catechol from phenol to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a mixed contact reaction device for preparing catechol from phenol, comprising a reactor, a ventilation assembly installed inside the reactor, the ventilation assembly comprising an air inlet pipe rotatably connected inside the reactor, and one end of the top of the air inlet pipe extends out of the reactor, two nozzles are fixedly plugged into the bottom of the circumferential outer wall of the air inlet pipe, and multiple nozzles are arranged on the outer walls at both ends of the two nozzles, and a one-way valve is arranged inside the multiple nozzles, a gear ring is fixedly sleeved on the top of the circumferential outer wall of the air inlet pipe, a support frame is fixedly connected to the top outer wall of the reactor, a motor is fixedly installed on the top outer wall of the support frame, a gear is coaxially fixed to the motor shaft, and the gear is meshed with the gear ring.

[0007] As a further preferred embodiment of the present technical solution, a pipe opening is provided on the outer wall at the top of the support frame, and one end of the top of the air inlet pipe is rotatably connected to the circumferential inner wall of the pipe opening.

[0008] The nozzle that introduces oxygen can continuously rotate inside the reactor, thereby ensuring that the phenol raw material inside the reactor can be in contact with oxygen in a timely manner, which is beneficial to improving the reaction efficiency. The oxygen enters the nozzle after passing through the air inlet pipe and finally escapes outward from the nozzle of the nozzle. At the same time, the motor on the top of the support frame is started, and the motor drives the gear to rotate. The gear can drive the air inlet pipe to rotate inside the reactor through the gear ring engaged with it, and then the nozzle fixed at the bottom of the air inlet pipe will also be driven to rotate, and the position of the oxygen it sprays will continue to change, thereby ensuring that all positions of the raw materials inside the reactor can be in contact with oxygen in a timely manner.

[0009] As a further preferred embodiment of the present technical solution, two dispersion components are installed outside the nozzle, and the two dispersion components are respectively located at two ends of the nozzle.

[0010] As a further preferred embodiment of the technical solution, the dispersion component includes two extension covers fixedly connected to the outer walls on both sides of the nozzle, a slot is provided on the outer walls on both sides of the two extension covers, and a card block adapted to the slot is slidably inserted inside the two extension covers, and the two card blocks are fixedly connected to the same external tube, the air inlet of the external tube corresponds to the nozzle position of the nozzle, and a plurality of air outlet holes distributed at equal distances are provided on the outside of the external tube.

[0011] By installing the dispersion component on the outside of the nozzle, the gas sprayed from the nozzle can be converted into a large number of small bubbles, which greatly increases the contact area between the raw materials and oxygen, and is beneficial to further increase the reaction efficiency. The external tube is covered on the outside of the nozzle of the nozzle so that the air inlet of the external tube corresponds to the nozzle of the nozzle. Then the card block will be inserted into the extension cover until the card head of the card block enters the card slot. The position of the external tube will be firmly restricted, and the gas sprayed from the nozzle will be divided into a large number of small bubbles under the action of multiple air outlets when passing through the external tube.

[0012] As a further preferred embodiment of the present technical solution, a sealing ring is disposed outside the nozzle of the spray head, and the multiple sealing rings are made of rubber material.

[0013] As a further preferred embodiment of the present technical solution, the circumferential outer wall of the air intake pipe is provided with a plurality of extension plates distributed at equal distances.

[0014] As a further preferred embodiment of the present technical solution, a feed pipe and an air outlet pipe are provided on the outer wall of the top of the reactor.

[0015] The utility model provides a mixed contact reaction device for preparing catechol from phenol, which has the following beneficial effects:

[0016] (1) The utility model provides a ventilation assembly so that the nozzle for introducing oxygen can continuously rotate inside the reactor, thereby ensuring that the phenol raw material inside the reactor can be in contact with oxygen in a timely manner, which is beneficial to improving the reaction efficiency. The oxygen enters the nozzle after passing through the air inlet pipe and finally escapes outward from the nozzle of the nozzle. At the same time, the motor on the top of the support frame is started, and the motor drives the gear to rotate. The gear can drive the air inlet pipe to rotate inside the reactor through the gear ring engaged with it, and then the nozzle fixed at the bottom of the air inlet pipe will also be driven to rotate, and the position of the oxygen sprayed by it will also continuously change, thereby ensuring that all positions of the raw materials inside the reactor can be in contact with oxygen in a timely manner.

[0017] (2) The utility model provides a dispersion component, and installs the dispersion component on the outside of the nozzle, so that the gas sprayed from the nozzle can be converted into a large number of small bubbles, so that the contact area between the raw material and oxygen is greatly increased, which is beneficial to further increase the reaction efficiency. The external tube is covered on the outside of the nozzle of the nozzle, so that the air inlet of the external tube corresponds to the nozzle of the nozzle, and then the card block is inserted into the extension cover until the card head of the card block enters the inside of the card slot. The position of the external tube will be firmly restricted. When the gas sprayed from the nozzle passes through the external tube, it will be divided into a large number of small bubbles under the action of multiple air outlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the ventilation component of the utility model;

[0020] Figure 3 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 4 For the utility model Figure 2 The enlarged structural diagram at B in the middle;

[0022] In the figure: 1, reactor; 2, feed pipe; 3, outlet pipe; 4, ventilation assembly; 5, dispersion assembly; 401, air inlet pipe; 402, nozzle; 403, support frame; 404, motor; 405, gear ring; 406, gear; 407, extension plate; 501, external pipe; 502, outlet hole; 503, block; 504, extension cover; 505, slot; 506, sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model provides a technical solution: Figure 2 and Figure 3 As shown, in this embodiment, a mixed contact reaction device for preparing catechol from phenol includes a reactor 1, which is characterized in that: a ventilation component 4 is installed inside the reactor 1, the ventilation component 4 includes an air inlet pipe 401 rotatably connected inside the reactor 1, and one end of the top of the air inlet pipe 401 extends out of the reactor 1, two nozzles 402 are fixedly inserted at the bottom of the circumferential outer wall of the air inlet pipe 401, and multiple nozzles are arranged on the outer walls at both ends of the two nozzles 402, and a one-way valve is arranged inside the multiple nozzles, a gear ring 405 is fixedly sleeved on the top of the circumferential outer wall of the air inlet pipe 401, a support frame 403 is fixedly connected to the top outer wall of the reactor 1, a motor 404 is fixedly installed on the top outer wall of the support frame 403, a gear 406 is coaxially fixed to the rotating shaft of the motor 404, and the gear 406 is meshed with the gear ring 405, an electric heating pipe is arranged inside the reactor 1, and the electric heating pipe is electrically connected to an external controller through a wire.

[0025] A pipe opening is arranged on the outer wall of the top of the support frame 403, and the pipe opening is connected to the external oxygen supply device. One end of the top of the air inlet pipe 401 is rotatably connected to the inner wall of the circumference of the pipe opening, so as to ensure the normal rotation of the air inlet pipe 401 without affecting the gas flow.

[0026] Oxygen passes through the air inlet pipe 401 and enters the nozzle 402, and finally escapes outward from the nozzle of the nozzle 402. At the same time, the motor 404 on the top of the support frame 403 is started, and the motor 404 drives the gear 406 to rotate. The gear 406 can drive the air inlet pipe 401 to rotate inside the reactor 1 through the gear ring 405 meshing with it, and then the nozzle 402 fixed at the bottom of the air inlet pipe 401 will also be driven to rotate, and the position of the oxygen sprayed therefrom will also continue to change, thereby ensuring that each position of the raw materials inside the reactor 1 can be in contact with oxygen in time.

[0027] like Figure 2 and Figure 4 As shown, two dispersion components 5 are installed outside the nozzle 402, and the two dispersion components 5 are respectively located at two ends of the nozzle 402.

[0028] The dispersion component 5 includes two extension covers 504 fixedly connected to the outer walls on both sides of the nozzle 402, and a slot 505 is provided on the outer walls on both sides of the two extension covers 504. A block 503 adapted to the slot 505 is slidably inserted inside the two extension covers 504. The two blocks 503 are fixedly connected to the same external tube 501. The air inlet of the external tube 501 corresponds to the nozzle position of the nozzle 402, and a plurality of air outlet holes 502 distributed at equal distances are provided on the outside of the external tube 501.

[0029] A sealing ring 506 is disposed outside the nozzle of the spray head 402 , and the multiple sealing rings 506 are all made of rubber material, which can further increase the sealing between the spray head 402 and the external tube 501 .

[0030] By installing the dispersion component 5 on the outside of the nozzle 402, the gas sprayed from the nozzle 402 can be converted into a large number of small bubbles, which greatly increases the contact area between the raw material and oxygen, and is beneficial to further increase the reaction efficiency. The external tube 501 is covered on the outside of the nozzle of the nozzle 402, so that the air inlet of the external tube 501 corresponds to the nozzle of the nozzle 402, and then the block 503 is also inserted into the extension cover 504 until the head of the block 503 enters the inside of the card slot 505. The position of the external tube 501 will be firmly restricted, and the gas sprayed from the nozzle 402 will be divided into a large number of small bubbles under the action of multiple air outlets 502 when passing through the external tube 501.

[0031] like Figure 2 As shown, a plurality of extension plates 407 distributed at equal distances are provided on the circumferential outer wall of the air inlet pipe 401, so that the air inlet pipe 401 also has the effect of stirring the raw materials.

[0032] like Figure 1 As shown, a feed pipe 2 and an air outlet pipe 3 are provided on the top outer wall of the reactor 1.

[0033] The utility model provides a mixed contact reaction device for preparing catechol from phenol, and the specific working principle is as follows:

[0034] When the device is working, various raw materials are poured into the reactor 1 from the feed pipe 2, and then the electric heating tube arranged inside the reactor 1 is turned on. When the temperature of the raw materials rises to above 40 degrees, external oxygen is introduced into the air inlet pipe 401, and the oxygen enters the nozzle 402 after passing through the air inlet pipe 401, and finally escapes outward from the nozzle of the nozzle 402. At the same time, the motor 404 on the top of the support frame 403 is started, and the motor 404 drives the gear 406 to rotate. The gear 406 can drive the air inlet pipe 401 to rotate inside the reactor 1 through the gear ring 405 meshing with it, and then the nozzle 402 fixed at the bottom of the air inlet pipe 401 will also be driven to rotate, and the position of the oxygen sprayed therefrom will also change continuously, thereby ensuring that the raw materials inside the reactor 1 are kept in a stable state. Each position of the material can be in contact with oxygen in time. Before that, the dispersion component 5 can also be installed on the outside of the nozzle 402, which can convert the gas ejected from the nozzle 402 into a large number of small bubbles, greatly increasing the contact area between the raw material and oxygen, which is beneficial to further increase the reaction efficiency. The external tube 501 is covered on the outside of the nozzle of the nozzle 402, so that the air inlet of the external tube 501 corresponds to the nozzle of the nozzle 402, and then the block 503 is also inserted into the extension cover 504 until the head of the block 503 enters the inside of the card slot 505, and the position of the external tube 501 is firmly restricted. When the gas ejected from the nozzle 402 passes through the external tube 501, it will be divided into a large number of small bubbles under the action of multiple air outlets 502.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed contact reaction device for preparing catechol from phenol, comprising a reaction kettle (1), characterized in that: A ventilation assembly (4) is installed inside the reactor (1), the ventilation assembly (4) comprising an air inlet pipe (401) rotatably connected inside the reactor (1), and one end of the top of the air inlet pipe (401) extending out of the reactor (1), two nozzles (402) fixedly plugged into the bottom of the circumferential outer wall of the air inlet pipe (401), and multiple nozzles are arranged on the outer walls at both ends of the two nozzles (402), and a one-way valve is arranged inside each of the multiple nozzles, a gear ring (405) is fixedly sleeved on the top of the circumferential outer wall of the air inlet pipe (401), a support frame (403) is fixedly connected to the top outer wall of the reactor (1), a motor (404) is fixedly installed on the top outer wall of the support frame (403), a gear (406) is coaxially fixed to the rotating shaft of the motor (404), and the gear (406) is meshed with the gear ring (405).

2. The mixed contact reaction device for preparing phenol to catechol according to claim 1, characterized in that: The top outer wall of the support frame (403) is provided with a pipe opening, and one end of the top of the air inlet pipe (401) is rotatably connected to the circumferential inner wall of the pipe opening.

3. The mixed contact reaction device for preparing phenol to catechol according to claim 1, characterized in that: Two dispersion components (5) are installed outside the spray head (402), and the two dispersion components (5) are respectively located at two ends of the spray head (402).

4. The mixed contact reaction device for preparing phenol to catechol according to claim 3, characterized in that: The dispersion component (5) comprises two extension covers (504) fixedly connected to the outer walls on both sides of the nozzle (402), the outer walls on both sides of the two extension covers (504) are each provided with a slot (505), the interior of the two extension covers (504) is slidably plugged with a block (503) adapted to the slot (505), the two blocks (503) are fixedly connected to the same external tube (501), the air inlet of the external tube (501) corresponds to the nozzle position of the nozzle (402), and the exterior of the external tube (501) is provided with a plurality of air outlet holes (502) distributed at equal distances.

5. The mixed contact reaction device for preparing phenol to catechol according to claim 4, characterized in that: A sealing ring (506) is disposed outside the nozzle of the spray head (402), and the plurality of sealing rings (506) are all made of rubber material.

6. The mixed contact reaction device for preparing phenol to catechol according to claim 1, characterized in that: The circumferential outer wall of the air inlet pipe (401) is provided with a plurality of extension plates (407) distributed at equal distances.

7. The mixed contact reaction device for preparing catechol from phenol according to claim 1, characterized in that: The top outer wall of the reactor (1) is provided with a feed pipe (2) and an air outlet pipe (3).

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