Catalytic synthesis device for synthesizing acetic anhydride through carbonylation

Abstract

The utility model discloses a catalytic synthesis device for carbonylation synthesis of acetic anhydride, which belongs to the technical field of synthesis devices, and adopts the technical scheme that the catalytic synthesis device comprises a reaction kettle body and a purification mechanism, the top of the reaction kettle body is rotatably connected with an upper cover, and the top of the upper cover is bolted with a motor; the output end of the bottom of the motor is rotationally connected with a rotating rod, the reaction kettle body is arranged, the reaction kettle body can support and limit a catalyst, acetic anhydride, the upper cover and the discharging pipe, the upper cover can support and limit the motor and can seal or open the reaction kettle body, the motor can drive the rotating rod to rotate, and the rotating rod can drive the reaction kettle body to rotate. The rotating rod can drive the rotating shaft to rotate, the rotating shaft can drive the stirring blades to rotate, the stirring blades can fuse and stir a catalyst and acetic anhydride on the inner side of the reaction kettle body, and the exhaust pipe can guide carbon monoxide on the inner side of the reaction kettle body to the purification mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of synthesis devices, in particular to a catalytic synthesis device for carbonylation synthesis of acetic anhydride. Background Art

[0002] The carbonylation synthesis of acetic anhydride is an important industrial production process. In this process, methyl acetate and methanol react with carbon monoxide in the presence of a catalyst to produce acetic anhydride.

[0003] At present, there is a Chinese utility model with publication number: CN206653085U. This utility model discloses a reactor for synthesizing acetic anhydride by liquid-phase carbonylation of methyl acetate, comprising an upper head, a lower head and a cylinder, wherein the upper head and the lower head are both made of nickel-based alloy material, the cylinder is a multi-layer wrapping structure, and the multi-layer wrapping structure includes at least three layers, which are, from the inside to the outside, a nickel-based alloy inner layer, a first carbon steel layer and a second carbon steel layer, the first carbon steel layer and the second carbon steel layer are flush with the weld between the head, forming a first weld, the weld between the nickel-based alloy inner layer and the head is a second weld, the first weld and the second weld are staggered, the thickness of the nickel-based alloy inner layer is 1 / 5-1 / 3 of the thickness of the head, and the reasonable combination of the weld of the carbon steel layer and the thickness of each carbon steel layer makes the reactor of the utility model easier to weld, and the welded structure has higher strength.

[0004] When acetic anhydride is carbonylated, a reactor for synthesizing acetic anhydride by carbonylation of methyl acetate in liquid phase is used, and a catalytic synthesis device for synthesizing acetic anhydride by carbonylation is one of them. However, the existing reactor for synthesizing acetic anhydride by carbonylation of methyl acetate in liquid phase lacks a structure for purifying and discharging carbon monoxide in the reactor body, resulting in that when the user discharges and collects the acetic anhydride catalyzed in the reactor body, the carbon monoxide is discharged from the inner side of the reactor body together with the acetic anhydride, thereby causing damage to the user's body. Utility Model Content

[0005] The utility model provides a catalytic synthesis device for synthesizing acetic anhydride by carbonylation, aiming to solve the problem that the existing reactor for synthesizing acetic anhydride by carbonylation of methyl acetate in liquid phase lacks a structure for purifying and discharging carbon monoxide in a reactor body, so that when a user discharges and collects acetic anhydride catalyzed in the reactor body, carbon monoxide is discharged from the inner side of the reactor body together with the acetic anhydride, thereby causing damage to the user's body.

[0006] The utility model is implemented as follows: a catalytic synthesis device for synthesizing acetic anhydride by carbonylation, comprising a reactor body and a purification mechanism, wherein the top of the reactor body is rotatably connected with an upper cover, the top of the upper cover is bolted with a motor, the output end of the bottom of the motor is rotatably connected with a rotating rod, the bottom of the rotating rod is bolted with a rotating shaft, the surface of the rotating shaft is bolted with a stirring blade, the left side of the reactor body is connected with an exhaust pipe, the top of the exhaust pipe is rotatably connected with an exhaust valve, the purification mechanism is connected with the left side of the exhaust pipe, the bottom of the reactor body is bolted with a support frame, and the bottom of the reactor body is connected with a discharge pipe;

[0007] The purification mechanism includes a purification tank, a purifier body, an electric fan, and a limiting column. The purification tank is connected to the left side of the exhaust pipe, the purifier body is bolted to the inner side of the purification tank, the electric fan is bolted to the top of the purification tank body, and the limiting column is bolted to the bottom of the purification tank.

[0008] In order to achieve the effect of opening or closing the discharge pipe, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, the surface of the discharge pipe is connected to an on-off valve, and the surface of the on-off valve is engraved with anti-slip patterns.

[0009] In order to increase the stability of the support frame, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, the bottom of the support frame is bolted with a base, and the bottom of the base is engraved with anti-slip patterns.

[0010] In order to protect the output end at the bottom of the motor, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, the output end at the bottom of the motor is bolted with a sealing ring, and the side of the sealing ring away from the output end of the motor is bolted to the inner side of the upper cover.

[0011] In order to increase the airtightness of the connection between the exhaust pipe and the reactor body, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride in the utility model, the exhaust pipe is bolted with an air-tight pad on one side close to the reactor body, and the air-tight pad is bolted to the inner side of the reactor body on the side away from the exhaust pipe.

[0012] In order to increase the friction force on the surface of the exhaust valve, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, the surface of the exhaust valve is provided with a protective sleeve, and the surface of the protective sleeve is engraved with anti-slip patterns.

[0013] In order to increase the sealing effect of the connection between the upper cover and the reactor body, as a preferred catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, the bottom of the upper cover is connected to a limiting sleeve, and the side of the limiting sleeve away from the upper cover is connected to the top of the reactor body.

[0014] In order to protect the rotating rod, as a preferred embodiment of the catalytic synthesis device for carbonylation synthesis of acetic anhydride of the utility model, a protective shell is bolted to the surface of the rotating rod, and the surface of the protective shell is coated with an anti-corrosion coating.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The catalytic synthesis device for synthesizing acetic anhydride by carbonylation is provided with a reactor body, the reactor body can support and limit the catalyst, acetic anhydride, the upper cover and the discharge pipe, the upper cover can support and limit the motor, and the reactor body can be sealed or opened, the motor can drive the rotating rod to rotate, the rotating rod can drive the rotating shaft to rotate, the rotating shaft can drive the stirring blade to rotate, the stirring blade can fuse and stir the catalyst and acetic anhydride inside the reactor body, the exhaust pipe can guide the carbon monoxide inside the reactor body to the purification mechanism, the exhaust valve can open or close the exhaust pipe, and the support frame can control the reaction The reactor body can be supported and limited, and the discharge pipe can discharge the acetic anhydride after catalytic fusion inside the reactor body, so that the user can collect the acetic anhydride after catalytic fusion. The limiting column can support and limit the purification tank, and the purification tank can support and limit the purifier body and the electric fan, and can store carbon monoxide gas. The purifier body can absorb and purify carbon monoxide, and the electric fan can discharge the purified air out of the inside of the purification tank, thereby preventing the user from discharging the acetic anhydride after catalysis, and preventing the carbon monoxide from being discharged together with the acetic anhydride, thereby preventing the user from inhaling the carbon monoxide into the body and causing damage to the user's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of the catalytic synthesis device for synthesizing acetic anhydride by carbonylation;

[0018] Figure 2 This is a schematic diagram of the structure of the purification tank in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the limit sleeve in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the motor in the utility model;

[0021] Figure 5 For this utility model Figure 4 Enlarged schematic diagram at point A in the middle.

[0022] In the figure, 1. reactor body; 2. purification mechanism; 201. purification tank; 202. purifier body; 203. electric fan; 204. limiting column; 3. upper cover; 4. motor; 5. rotating rod; 6. rotating shaft; 7. stirring blade; 8. exhaust pipe; 9. exhaust valve; 10. support frame; 11. discharge pipe; 12. opening and closing valve; 13. base; 14. sealing ring; 15. air-tight pad; 16. protective cover; 17. limiting cover; 18. protective shell. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] See also Figure 1-5 The utility model provides a technical solution: a catalytic synthesis device for carbonylation synthesis of acetic anhydride, comprising a reactor body 1 and a purification mechanism 2, the top of the reactor body 1 is rotatably connected with an upper cover 3, the top of the upper cover 3 is bolted with a motor 4, the output end of the bottom of the motor 4 is rotatably connected with a rotating rod 5, the bottom of the rotating rod 5 is bolted with a rotating shaft 6, the surface of the rotating shaft 6 is bolted with a stirring blade 7, the left side of the reactor body 1 is connected with an exhaust pipe 8, the top of the exhaust pipe 8 is rotatably connected with an exhaust valve 9, the purification mechanism 2 is connected to the left side of the exhaust pipe 8, the bottom of the reactor body 1 is bolted with a support frame 10, and the bottom of the reactor body 1 is connected with a discharge pipe 11;

[0026] The purification mechanism 2 includes a purification tank 201, a purifier body 202, an electric fan 203, and a limiting column 204. The purification tank 201 is connected to the left side of the exhaust pipe 8, the purifier body 202 is bolted to the inner side of the purification tank 201, the electric fan 203 is bolted to the top of the purification tank 201 body, and the limiting column 204 is bolted to the bottom of the purification tank 201.

[0027] In this embodiment: by setting the reactor body 1, the reactor body 1 can support and limit the catalyst, acetic anhydride, the upper cover 3 and the discharge pipe 11, the upper cover 3 can support and limit the motor 4, and the reactor body 1 can be sealed or opened, the motor 4 can drive the rotating rod 5 to rotate, the rotating rod 5 can drive the rotating shaft 6 to rotate, the rotating shaft 6 can drive the stirring blade 7 to rotate, the stirring blade 7 can fuse and stir the catalyst and acetic anhydride inside the reactor body 1, the exhaust pipe 8 can guide the carbon monoxide inside the reactor body 1 to the purification mechanism 2, the exhaust valve 9 can open or close the exhaust pipe 8, and the support frame 10 can The support and limitation are such that the discharge pipe 11 can discharge the acetic anhydride after catalytic fusion inside the reactor body 1, so that the user can collect the acetic anhydride after catalytic fusion. The limiting column 204 can support and limit the purification tank 201. The purification tank 201 can support and limit the purifier body 202 and the electric fan 203, and can store carbon monoxide gas. The purifier body 202 can absorb and purify carbon monoxide, and the electric fan 203 can discharge the purified air out of the inside of the purification tank 201, thereby preventing the user from discharging the acetic anhydride after catalysis, and preventing the carbon monoxide from being discharged together with the acetic anhydride, thereby preventing the user from inhaling the carbon monoxide into the body and causing damage to the user's body.

[0028] As a technical optimization solution of the utility model, the surface of the discharge pipe 11 is connected to an on-off valve 12 , and the surface of the on-off valve 12 is engraved with anti-slip patterns.

[0029] In this embodiment: by providing an on-off valve 12, the discharge pipe 11 can be opened or closed, and by providing anti-slip patterns, the friction force on the surface of the on-off valve 12 can be increased.

[0030] As a technical optimization solution of the present invention, a base 13 is bolted to the bottom of the support frame 10 , and anti-slip patterns are engraved on the bottom of the base 13 .

[0031] In this embodiment: by providing the base 13, the stability between the support frame 10 and the ground can be increased, and by providing the anti-slip texture, the friction between the base 13 and the ground can be increased.

[0032] As a technical optimization solution of the present invention, a sealing ring 14 is bolted to the output end at the bottom of the motor 4 , and a side of the sealing ring 14 away from the output end of the motor 4 is bolted to the inner side of the upper cover 3 .

[0033] In this embodiment, the sealing ring 14 is provided to protect the output end at the bottom of the motor 4 .

[0034] As a technical optimization solution of the utility model, a side of the exhaust pipe 8 close to the reactor body 1 is bolted with an air-tight pad 15 , and a side of the air-tight pad 15 away from the exhaust pipe 8 is bolted to the inner side of the reactor body 1 .

[0035] In this embodiment, the airtightness of the connection between the exhaust pipe 8 and the reactor body 1 can be increased by providing the airtight pad 15 .

[0036] As a technical optimization solution of the utility model, a protective sleeve 16 is provided on the surface of the exhaust valve 9, and the surface of the protective sleeve 16 is engraved with anti-slip patterns.

[0037] In this embodiment: by providing the protective cover 16, the surface of the exhaust valve 9 can be protected, and by providing the anti-slip texture, the friction force on the surface of the protective cover 16 can be increased.

[0038] As a technical optimization solution of the utility model, the bottom of the upper cover 3 is clamped with a limiting sleeve 17 , and the side of the limiting sleeve 17 away from the upper cover 3 is clamped on the top of the reactor body 1 .

[0039] In this embodiment, by providing the limiting sleeve 17 , the airtightness of the clamping point between the upper cover 3 and the reactor body 1 can be increased.

[0040] As a technical optimization solution of the present utility model, a protective shell 18 is bolted to the surface of the rotating rod 5, and the surface of the protective shell 18 is coated with an anti-corrosion paint.

[0041] In this embodiment: by providing a protective shell 18, the surface of the rotating rod 5 can be protected, and by providing an anti-corrosion coating, the protective shell 18 can be prevented from being corroded and rusted after being in contact with the catalyst and acetic anhydride for a long time.

[0042] Working principle: First, the user opens the upper cover 3, mixes the methyl acetate mixture into a certain carbonylation mixed raw material, and feeds it into the inner side of the reactor body 1 at a certain flow rate. Then the user closes the upper cover 3, turns on the power and starts the reactor body 1. The reactor body 1 will start to heat the raw material and react with carbon monoxide to form a carbonyl synthesis reaction. Then the user turns on the power and starts the motor 4. The motor 4 will drive the rotating rod 5 to rotate, and the rotating rod 5 will drive the rotating shaft 6 to rotate. The rotating shaft 6 will drive the stirring blade 7 to stir the raw material inside the reactor body 1. After the stirring is completed, the user turns off the motor 4 to stop stirring, and the raw material is left to cool. Then, the stirring blade 7 is turned off. When the user opens the exhaust valve 9, the carbon monoxide inside the reactor body 1 will enter the inside of the purification tank 201 through the exhaust pipe 8. After the carbon monoxide enters the inside of the purification tank 201, the user turns on the power and starts the purifier body 202, and the purifier body 202 will purify the carbon monoxide inside the purification tank 201. After the purification is completed, the user turns on the power and starts the electric fan 203, and the electric fan 203 will discharge the purified air inside the purification tank 201 out of the inside of the purification tank 201. Finally, the user opens the opening and closing valve 12 to discharge the acetic anhydride after the catalytic fusion is completed through the discharge pipe 11, and the user can collect the acetic anhydride after the catalytic fusion is completed.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A catalytic synthesis device for synthesizing acetic anhydride by carbonylation, comprising a reactor body (1) and a purification mechanism (2), characterized in that: The top of the reactor body (1) is rotatably connected to an upper cover (3), the top of the upper cover (3) is bolted to a motor (4), the output end of the bottom of the motor (4) is rotatably connected to a rotating rod (5), the bottom of the rotating rod (5) is bolted to a rotating shaft (6), the surface of the rotating shaft (6) is bolted to a stirring blade (7), the left side of the reactor body (1) is connected to an exhaust pipe (8), the top of the exhaust pipe (8) is rotatably connected to an exhaust valve (9), the purification mechanism (2) is connected to the left side of the exhaust pipe (8), the bottom of the reactor body (1) is bolted to a support frame (10), and the bottom of the reactor body (1) is connected to a discharge pipe (11); The purification mechanism (2) comprises a purification tank (201), a purifier body (202), an electric fan (203), and a limiting column (204); the purification tank (201) is connected to the left side of the exhaust pipe (8); the purifier body (202) is bolted to the inner side of the purification tank (201); the electric fan (203) is bolted to the top of the purification tank (201) body; and the limiting column (204) is bolted to the bottom of the purification tank (201).

2. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: The surface of the discharge pipe (11) is connected to an on-off valve (12), and the surface of the on-off valve (12) is engraved with anti-slip patterns.

3. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: The bottom of the support frame (10) is bolted to a base (13), and the bottom of the base (13) is engraved with anti-slip patterns.

4. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: The output end at the bottom of the motor (4) is bolted with a sealing ring (14), and the side of the sealing ring (14) away from the output end of the motor (4) is bolted to the inner side of the upper cover (3).

5. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: A gas-tight pad (15) is bolted to the side of the exhaust pipe (8) close to the reactor body (1), and a side of the gas-tight pad (15) away from the exhaust pipe (8) is bolted to the inner side of the reactor body (1).

6. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: The surface of the exhaust valve (9) is covered with a protective sleeve (16), and the surface of the protective sleeve (16) is engraved with anti-slip patterns.

7. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: The bottom of the upper cover (3) is clamped with a limiting sleeve (17), and the side of the limiting sleeve (17) away from the upper cover (3) is clamped with the top of the reactor body (1).

8. The catalytic synthesis device for carbonylation synthesis of acetic anhydride according to claim 1, characterized in that: A protective shell (18) is bolted to the surface of the rotating rod (5), and the surface of the protective shell (18) is coated with an anti-corrosion paint.

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