Improved reaction kettle for preparing 2, 6-dichlorobenzoyl chloride

Abstract

The utility model discloses an improved reaction kettle for preparing 2, 6-dichlorobenzoyl chloride, which comprises a tank body, a rotating shaft arranged in the tank body, a channel arranged at the top of the rotating shaft and extending downwards along the length direction of the rotating shaft, and a plurality of delivery pipes, the top of each delivery pipe is inserted into the rotating shaft, and the channel is communicated with the channel. The conveying pipes are communicated with the channel and used for conveying the synthetic raw materials in the channel, each conveying pipe is obliquely arranged, and the top end of each conveying pipe inclines towards the center direction of the rotating shaft. Liquid in the tank body is stirred while a chlorination reagent is sprayed out through the conveying pipes at different height positions, so that the bottom layer, the middle layer and the upper layer of the liquid are filled with the chlorination reagent at the first time, and the chlorination reagent and raw materials can be quickly mixed under the cooperation of the stirring assembly, so that the reaction speed of 2, 4-dichloroethane is greatly increased. The utility model relates to production of 2, 6-dichlorobenzoyl chloride.

Description

TECHNICAL FIELD

[0001] The utility model relates to an improved reaction kettle for preparing 2,6-dichlorobenzoyl chloride. BACKGROUND

[0002] 2,6-dichlorobenzoyl chloride is a colorless to light yellow liquid at normal temperature and pressure, which is miscible with organic solvents such as benzene, toluene, xylene, etc., but not soluble in water. It not only has toxicity, but also has irritability and corrosivity. It is an important organic synthesis intermediate in the chemical industry, which can be used for synthesizing various organic compounds such as pesticides, medicines, dyes, etc.

[0003] At present, the production of 2,6-dichlorobenzoyl chloride can be carried out by using 2,6-dichlorotoluene as the starting material, adding oxidizing agents such as hydrogen peroxide or potassium permanganate, and converting the methyl group into carboxyl group through oxidation reaction to generate 2,6-dichlorobenzoic acid. Then, 2,6-dichlorobenzoic acid is mixed with chlorinating reagents such as thionyl chloride or phosphorus pentachloride in the reaction kettle to complete the production of 2,6-dichlorobenzoyl chloride.

[0004] However, in the current reaction kettle, when producing 2,6-dichlorobenzoyl chloride, the chlorinating reagent is often in the upper layer of the raw material, i.e. 2,6-dichlorobenzoic acid, when it is first added. With continuous stirring and mixing, the chlorinating reagent is often in the lower layer of the liquid surface, which leads to the fact that the raw material and the chlorinating reagent cannot be quickly mixed, and the production efficiency is not high.

[0005] Therefore, it is necessary to invent an improved reaction kettle for preparing 2,6-dichlorobenzoyl chloride to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] (I) Purpose of the utility model

[0007] To solve the technical problems existing in the background art, the utility model provides an improved reaction kettle for preparing 2,6-dichlorobenzoyl chloride. The chlorinating reagent is sprayed through the delivery pipe at different heights at the same time, and the liquid inside the tank body is stirred, so that the chlorinating reagent fills the bottom layer, middle layer and upper layer of the liquid at the first time, and the chlorinating reagent and the raw material can be quickly mixed under the cooperation of the stirring assembly, thereby greatly speeding up the production of 2,6-dichlorobenzoyl chloride.

[0008] (II) Technical scheme

[0009] In order to achieve the above purpose, the utility model provides the following technical scheme: an improved reaction kettle for preparing 2,6-dichlorobenzoyl chloride, comprising a tank body, wherein a rotating shaft is installed inside the tank body;

[0010] A channel is formed in the top of the rotating shaft and extends downward along the length direction of the rotating shaft.

[0011] A plurality of conveying pipes are arranged, each of which is inserted into the inside of the rotating shaft, and is connected with the channel for conveying the synthetic raw materials in the channel;

[0012] Each of the conveying pipes is arranged obliquely, and the top end is inclined towards the center of the rotating shaft, four of the conveying pipes are arranged uniformly and spaced from each other from top to bottom for conveying the synthetic raw materials to the liquid surfaces at different heights.

[0013] A stirring assembly is arranged in the inside of the tank body for optimizing the stirring speed in the inside of the tank body.

[0014] Preferably, a driving motor is arranged on the top of the tank body, and a spur gear is arranged on the output end of the driving motor.

[0015] Preferably, the rotating shaft penetrates through the top wall of the tank body and extends above the top of the tank body, and an annular gear is arranged on the outside of the top end of the rotating shaft and engaged with the spur gear.

[0016] Preferably, the stirring assembly comprises a paddle arranged on the outside of the bottom end of the rotating shaft and a slant pipe penetrating through the bottom of the rotating shaft.

[0017] Preferably, the paddle is arranged in the shape of a right trapezoid with the inclined side on the top, four of the paddles are arranged uniformly and spaced from each other around the bottom of the rotating shaft, and a plurality of holes are arranged on the side of each of the paddles.

[0018] Preferably, the top end of the slant pipe is inclined away from the center of the rotating shaft, and the bottom end of the slant pipe extends between any two adjacent paddles.

[0019] Preferably, two cross bars are connected to one side of the rotating shaft, and scrapers are arranged on the end portions of the two cross bars and abut against the inner wall of the tank body.

[0020] Preferably, a plurality of heating plates are arranged on the outer wall of the tank body, and supporting legs are arranged on the four corners of the bottom of the tank body.

[0021] Preferably, a feeding port is arranged on the top of the tank body, and a discharging port is arranged on the bottom of the tank body.

[0022] Compared with the prior art, the above technical scheme of the present application has the following beneficial effects:

[0023] The utility model discloses a different height position's conveying pipe is installed to the outside of the rotating shaft, when raw material, such as 2, 6 - dichlorobenzoyl chloride, is in production, the raw material is in the inside of jar body, and the chlorinated reagent is passed into the inside of rotating shaft through the passage, and then is sprayed through different conveying pipes, so that the chlorinated reagent fills in the bottom layer, middle layer, upper layer of liquid in the first time, simultaneously, the conveying pipe is also the first time to the solution in jar body when spraying the chlorinated reagent and stirs, and under the cooperation of stirring subassembly, the chlorinated reagent and raw material can mix fast, thereby greatly accelerating the production of 2, 6 - dichlorobenzoyl chloride. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the technical personnel of the prior art or the embodiments of the present application more clearly understand the technical solutions, the following will be briefly introduced the drawings needed to be used in the embodiments, obviously, the drawings in the following description only some embodiments of the utility model are recorded, for the ordinary skilled in the art, other drawings can also be obtained according to these drawings.

[0025] Figure 1 It is the whole structure schematic diagram of the utility model;

[0026] Figure 2 It is the connecting structure schematic diagram of the rotating shaft and the inclined pipe of the utility model;

[0027] Figure 3 It is the sectional view of jar body of the utility model;

[0028] Figure 4 It is the perspective view of the utility model.

[0029] Mark explanation of drawing:

[0030] 1 jar body, 2 rotating shaft, 3 passage, 4 conveying pipe, 5 drive motor, 6 straight gear, 7 ring gear, 8 shift plate, 9 inclined pipe, 10 hole, 11 cross bar, 12 scraper, 13 heating plate, 14 support leg, 15 feed inlet, 16 discharge port. DETAILED DESCRIPTION

[0031] In order to make the technical personnel of the prior art or the embodiments of the present application more clearly understand the technical solutions, the following will be briefly introduced the drawings needed to be used in the embodiments, obviously, the drawings in the following description only some embodiments of the utility model are recorded, for the ordinary skilled in the art, other drawings can also be obtained according to these drawings.

[0032] The utility model provides a kind of improved reaction kettle for preparing 2, 6 - dichlorobenzoyl chloride as Figures 1-4 As shown in the figure, including jar body 1, the rotating shaft 2 is installed in the inside of jar body 1;

[0033] Passage 3 is opened in the top of rotating shaft 2, and extends downward along the length direction of rotating shaft 2;

[0034] A plurality of conveying pipes 4 are arranged, each of which is inserted into the rotating shaft 2 at the top and communicates with the channel 3 to convey the synthetic raw materials in the channel 3.

[0035] Each of the conveying pipes 4 is inclined, and the top end is inclined towards the center of the rotating shaft 2. Four of the conveying pipes 4 are uniformly spaced from top to bottom to convey the synthetic raw materials to the liquid surfaces at different heights.

[0036] A stirring assembly is installed in the tank 1 to optimize the stirring rate in the tank 1.

[0037] In an embodiment, a driving motor 5 is installed at the top of the tank 1, a spur gear 6 is installed at the output end of the driving motor 5, the rotating shaft 2 penetrates the top wall of the tank 1 and extends above the top of the tank 1, an annular gear 7 is installed on the outer side of the top end of the rotating shaft 2 and engages with the spur gear 6. When the driving motor 5 is started, the annular gear 7 can be driven to rotate by the spur gear 6, so that the conveying pipes 4 can rotate with the rotating shaft 2 to stir the raw materials in the tank 1.

[0038] In an embodiment, the stirring assembly includes a paddle 8 installed on the outer side of the bottom end of the rotating shaft 2 and a inclined pipe 9 penetrating the bottom of the rotating shaft 2 to optimize the stirring effect in the tank 1. The top end of the inclined pipe 9 is inclined away from the center of the rotating shaft 2, and the bottom end of the inclined pipe 9 extends between any two adjacent paddles 8. When the liquid surface is lower than the opening at the top of the inclined pipe 9, the mixed liquid at the bottom of the tank 1 can be thrown upwards to replace the mixed liquid at the top. The cross section of the paddle 8 is arranged in a right trapezoidal shape, and the inclined side is located at the top. Four paddles 8 are uniformly spaced around the bottom of the rotating shaft 2, and a plurality of holes 10 are formed in the side of each paddle 8 to further improve the stirring effect of the raw materials and chlorinating reagents and improve the mixing rate.

[0039] In an embodiment, two cross bars 11 are connected to one side of the rotating shaft 2, and scrapers 12 are installed at the ends of the two cross bars 11. When the production of 2,6-dichlorobenzoyl chloride is completed, the discharge port 16 is opened to discharge. At this time, the cross bars 11 rotate synchronously with the rotation of the rotating shaft 2, thereby driving the scrapers 12 to make a circular motion along the inner wall of the tank 1, so that the residual 2,6-dichlorobenzoyl chloride on the inner wall of the tank 1 can be quickly gathered and fall downward under the action of gravity, and then discharged through the discharge port 16.

[0040] In one embodiment, several heating plates 13 are attached to the outer wall of the tank 1 to control the temperature of the tank 1 and improve the mixing rate of raw materials and chlorination reagent. Support legs 14 are installed at the four corners of the bottom of the tank 1, a feed inlet 15 is installed at the top of the tank 1, and a discharge outlet 16 is installed at the bottom of the tank 1 to facilitate the use of the tank 1.

[0041] The specific implementation method is as follows: In use, the pipe for injecting the chlorinating reagent is inserted into the top opening of the rotating shaft 2. The raw material used to generate 2,6-dichlorobenzoyl chloride, such as 2,6-dichlorobenzoic acid, is first injected into the tank 1 through the feed inlet 15. Then, the drive motor 5 is started, and the output end of the drive motor 5 rotates, thereby driving the spur gear 6 to rotate. At this time, the ring gear 7 meshing with the spur gear 6 rotates, thereby driving the rotating shaft 2 to rotate. Simultaneously, the operator injects the chlorinating reagent through the top opening of the channel 3. The chlorinating reagent will flow along the channel 3 towards... As the rotating shaft 2 continues to rotate, each conveying pipe 4 will rotate with the rotating shaft 2, stirring the raw materials in the tank 1. At the same time, as the chlorinating reagent continues to fall, the chlorinating reagent can be thrown out through the bottom outlet of each conveying pipe 4. Since the height of the conveying pipes 4 is not the same, the chlorinating reagent can be conveyed to the bottom, middle and top layers of the liquid surface, respectively, and come into contact with the raw materials at different liquid depths at the same time. Under the continuous stirring of the conveying pipes 4, the reagent is mixed with the raw materials, thereby completing the production of 2,6-dichlorobenzoyl chloride.

[0042] Furthermore, during the rotation of the shaft 2, the bottom baffle 8 will rotate. When the baffle 8 rotates, the mixture inside the tank 1 will be moved by the baffle 8, and a portion of it will pass through the hole 10. This causes the mixture to fluctuate as it rotates with the baffle 8, which means that the raw material and chlorination reagent at the bottom of the tank 1 are not mixed in one direction, thus improving the mixing efficiency.

[0043] Furthermore, the rotation of the shaft 2 will also drive the inclined tube 9 to rotate. The inclined tube 9 can further stir the liquid in the tank 1. When the liquid level is lower than the top opening of the inclined tube 9, as the inclined tube 9 rotates, under the action of centrifugal force, the bottom mixture will flow upward along the inside of the inclined tube 9, and then be thrown out through the top opening of the inclined tube 9 until it falls back to the top layer of the liquid surface, realizing the replacement of the bottom and top layers of the mixture, avoiding the mixture from always being at the bottom. Furthermore, under the stirring of the conveying pipe 4 and the inclined tube 9, the mixing rate of the raw material and the chlorination reagent is greatly improved, which is beneficial to the production of 2,6-dichlorobenzoyl chloride.

[0044] like Figure 3 As shown, the cover on top of the tank 1 can be opened upwards. Specifically, the cover is connected to the main body of the tank 1 by threads, which makes it easy to disassemble and assemble, so that the internal parts of the tank 1 can be inspected and repaired in a timely manner.

[0045] The embodiment specifically solves the problem that in the prior art, when producing 2,6-dichlorobenzoyl chloride, the chlorinating reagent is often in the upper layer of the raw material, that is, 2,6-dichlorobenzoic acid, and with continuous stirring and mixing, the chlorinating reagent is often in the lower layer of the liquid surface, so that the raw material and the chlorinating reagent cannot be quickly mixed, and the production efficiency is not high.

[0046] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. An improved reaction still for the production of 2,6-dichlorobenzoyl chloride, characterized by: Include: The tank (1) is internally mounted with rotating shaft (2); Channel (3), set in the rotating shaft (2) top, and along the rotating shaft (2) length direction downward; Conveying pipe (4) is provided with several, each conveying pipe (4) top is inserted into the rotating shaft (2) inside, the conveying pipe (4) is communicated with channel (3), for conveying synthetic raw materials in channel (3); Wherein, each conveying pipe (4) is inclined to set, and the top end is inclined to the center direction of rotating shaft (2), the conveying pipe (4) four groups, and from top to bottom are evenly spaced, for conveying synthetic raw materials to the liquid surface of different height; Stirring assembly, installed in the tank (1) inside, for optimizing the stirring rate inside the tank (1).

2. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 1, wherein: The tank (1) top is installed with driving motor (5), and the output end of driving motor (5) is installed with straight gear (6).

3. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 2, wherein: The rotating shaft (2) top penetrates the tank (1) top wall and extends to the tank (1) top, and the rotating shaft (2) top end outside is installed with ring gear (7) engaged with straight gear (6).

4. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 1, wherein: The stirring assembly comprises a paddle (8) installed on the outer side of the bottom end of the rotating shaft (2), and a inclined pipe (9) penetrating the bottom of the rotating shaft (2).

5. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 4, wherein: The paddle (8) is provided with four straight-angled trapezoidal shapes, and the inclined edge is located above, the paddle (8) is provided with four, and is evenly distributed around the bottom of the rotating shaft (2), and each side of the paddle (8) is provided with a plurality of holes (10).

6. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 4, wherein: The top end of the inclined pipe (9) is inclined away from the center direction of the rotating shaft (2), and the bottom end of the inclined pipe (9) extends between any two adjacent paddles (8).

7. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 1, wherein said reactor comprises: The rotating shaft (2) is connected with two cross bars (11) on one side, and the cross bars (11) are installed with scraper (12) on the end portion, and the scraper (12) is attached to the inner wall of the tank (1).

8. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 1, wherein: The outer wall of the tank (1) is attached with a plurality of heating plates (13), and the bottom of the tank (1) is installed with supporting legs (14).

9. The improved reactor for the preparation of 2,6-dichlorobenzoyl chloride as claimed in claim 1, wherein: The tank (1) top is installed with feeding port (15), and the tank (1) bottom is installed with discharge port (16).

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