Synthesis reactor

Abstract

The utility model belongs to the technical field of synthesis reactors, and discloses a synthesis reactor which comprises a reaction kettle main body, the inner cavity wall of the reaction kettle main body is coated with a polytetrafluoroethylene anti-corrosion layer, the thickness of the polytetrafluoroethylene anti-corrosion layer is 1-2mm, the top of the reaction kettle main body is provided with a feeding channel, and the feeding channel is communicated with the reaction kettle main body. A discharge hole is formed in the bottom of the reaction kettle main body; the stirring device comprises a stirring rod which is vertically arranged and rotatably mounted in the reaction kettle main body, a multi-layer structure paddle is arranged on the stirring rod, and the stirring rod is driven by a variable frequency motor; the micro-channel fluorinating agent distributors are mounted on the bottom wall of the inner cavity of the reaction kettle main body, and the micro-channel fluorinating agent distributors are arranged along the axial direction of the reaction kettle main body at equal intervals. According to the utility model, axial, radial and tangential three-dimensional mixing is realized through the combination of the three layers of differentiated paddles, and the micro-channel fluorinating agent distributor is matched, so that not only can the dispersing uniformity of a fluorinating agent be improved, but also byproducts can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to synthetic reactor technical field especially relates to a synthetic reactor. BACKGROUND

[0002] 3, 5-dimethyl fluorobenzene synthetic reactor is special for 3, 5-dimethyl fluorobenzene high efficiency, safe preparation special chemical industry equipment, and its core function is to realize methylization, fluorination and the continuous or batch production of purification, simultaneously ensure byproduct minimization and product purity.

[0003] 3, 5-dimethyl fluorobenzene is an important medicine and pesticide intermediate, and its synthesis usually takes 3, 5-dimethyl aniline as raw material, is prepared by fluorination reaction, however, the traditional synthetic reactor has the following problems:

[0004] 1), mixing is not even: fluorination agent (such as hydrogen fluoride or fluoroborate) dispersion efficiency is low, leading to local concentration too high, and the increase of side reaction;

[0005] 2), corrosion: hydrogen fluoride strong corrosive easily damages the inner wall of reaction kettle, therefore, we propose a synthetic reactor. INVENTION CONTENTS

[0006] In order to overcome the defects of the prior art as pointed out above, the present inventors have made in-depth research thereon, and after a lot of creative labor, the present utility model is completed.

[0007] Specifically, the technical problem to be solved by the present utility model is to provide a synthetic reactor to solve the technical problems of uneven mixing and corrosion existing in the current synthetic reactor.

[0008] To solve the above technical problems, the present utility model provides the following technical scheme:

[0009] A synthetic reactor, comprising a reaction kettle main body, the inner cavity wall of the reaction kettle main body is coated with a polytetrafluoroethylene corrosion-resistant layer, the thickness is 1-2mm, the top of the reaction kettle main body is provided with a feeding channel, and the feeding channel is communicated with the reaction kettle main body, the bottom of the reaction kettle main body is provided with a discharge port, and the discharge port is communicated with the reaction kettle main body;

[0010] Stirring device, the stirring device includes the stirring rod that is vertically arranged and is rotatably installed in the reaction kettle main body, a plurality of layers of structure paddle are arranged on the stirring rod, and the stirring rod is driven by a variable frequency motor;

[0011] Micro-channel fluorination agent distributor, which is installed on the bottom wall of the inner cavity of the reaction kettle body and is equidistantly arranged along the axial direction of the reaction kettle body, comprises a porous ceramic plate and an annular distribution pipe.

[0012] A sealing device comprising a rubber cover sealingly installed and matched with the inner cavity of the feeding channel, which is driven by a driving assembly.

[0013] As an improved technical solution, a partition plate is fixedly installed on the inner cavity wall of the feeding channel, and the partition plate divides the inner cavity of the feeding channel into a feeding port and a fluorination agent inlet.

[0014] As an improved technical solution, the variable frequency motor is installed on the top of the reaction kettle body, and the output shaft of the variable frequency motor is in transmission connection with the stirring rod.

[0015] As an improved technical solution, the multi-layer structure paddle comprises three layers of upper, middle and lower layers, and the upper layer is a spiral paddle, the middle layer is a turbine paddle, and the lower layer is an anchor paddle.

[0016] As an improved technical solution, the micro-channel fluorination agent distributor has a micro-hole diameter of 0.1-0.5 mm and a distribution density of 5-10 micro-holes per square centimeter.

[0017] As an improved technical solution, the driving assembly comprises a cylinder, a piston end of the cylinder is fixedly installed with an adapter plate, the rubber cover is installed on the adapter plate, the outer surface of the feeding channel is fixedly installed with a fixing frame, and the cylinder is installed on the fixing frame.

[0018] After the above technical solution is adopted, the beneficial effects of the present application are as follows:

[0019] 1. The three-layer differential paddle (spiral + turbine + anchor type) combination realizes axial, radial and tangential three-dimensional mixing, and cooperates with the micro-channel fluorination agent distributor, so that the fluorination agent dispersion uniformity is improved, and by-products are reduced.

[0020] 2. The reaction kettle body inner cavity wall is coated with a polytetrafluoroethylene corrosion-resistant layer, and the polytetrafluoroethylene corrosion-resistant layer has the performance of resisting corrosion of hydrofluoric acid, so that the service life of the reaction kettle body is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings described in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is an overall front view structural schematic diagram of the present application.

[0023] Figure 2 It is an opening state structural schematic diagram of the sealing device of the present application.

[0024] Figure 3 It is a sectional view structural schematic diagram of the present application. Figure 2 It is an enlarged structural schematic diagram of position A in the present application.

[0025] Figure 4 It is a sectional view structural schematic diagram of the present application.

[0026] Figure 5 It is a structural schematic diagram of the stirring device of the present application.

[0027] Figure 6 It is a structural schematic diagram of the micro-channel fluorination agent distributor of the present application.

[0028] Explanation of reference signs:

[0029] In the drawings: 1, reaction kettle main body; 101, feeding channel; 102, discharge port; 103, partition plate; 2, frequency conversion motor; 3, stirring rod; 4, propeller blade; 5, turbine blade; 6, anchor blade; 701, porous ceramic plate; 702, annular distribution pipe; 8, air cylinder; 9, connecting plate; 10, rubber cover; 11, fixing frame. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0032] Meanwhile, "and / or" or "and / or" appearing in the whole text means that it includes three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme.

[0033] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

[0034] Referring to Figures 1-6 , a synthesis reactor is provided, the synthesis reactor includes a reaction kettle body 1, the inner cavity wall of the reaction kettle body 1 is coated with a polytetrafluoroethylene corrosion-resistant layer, the thickness is 1-2mm, the top of the reaction kettle body 1 is provided with a feeding channel 101, and the feeding channel 101 is communicated with the reaction kettle body 1, the inner cavity wall of the feeding channel 101 is fixedly provided with a partition plate 103, and the partition plate 103 divides the inner cavity of the feeding channel 101 to form a feeding port and a fluorinating agent inlet, the bottom of the reaction kettle body 1 is provided with a discharge port 102, and the discharge port 102 is communicated with the reaction kettle body 1, in application, by coating the polytetrafluoroethylene corrosion-resistant layer on the inner cavity wall of the reaction kettle body 1, and the polytetrafluoroethylene corrosion-resistant layer has the performance of resisting hydrofluoric acid corrosion, thereby the service life of the reaction kettle body can be prolonged;

[0035] The stirring device comprises a stirring rod 3 vertically arranged and rotationally installed in the reaction kettle body 1, a plurality of layers of structure paddles are arranged on the stirring rod 3, the plurality of layers of structure paddles comprise upper, middle and lower three layers, the upper layer is a spiral paddle 4, the middle layer is a turbine paddle 5, and the lower layer is an anchor paddle 6, the stirring rod 3 is driven by a variable frequency motor 2, the variable frequency motor 2 is installed at the top of the reaction kettle body 1, and the output shaft of the variable frequency motor 2 is in transmission connection with the stirring rod 3, in application, by arranging the plurality of layers of structure paddles, and combining the three layers of paddles, axial, radial and tangential three-dimensional mixing can be realized, thereby the uniformity of the fluorinating agent dispersion and the by-product can be reduced;

[0036] The micro-channel fluorination agent distributor is installed on the bottom wall of the inner cavity of the reaction kettle body 1, and is equidistantly arranged along the axial direction of the reaction kettle body 1, and the micro-channel fluorination agent distributor comprises a porous ceramic plate 701 and an annular distribution pipe 702, the micro-channel fluorination agent distributor has a micro-hole diameter of 0.1-0.5 mm and a distribution density of 5-10 micro-holes per square centimeter, and in application, the stirring device is used in cooperation with the micro-channel fluorination agent distributor, so that the uniformity of the fluorination agent is improved and the by-products are reduced.

[0037] The sealing device comprises a rubber cover 10 which is sealingly installed and matched with the inner cavity of the feeding channel 101, the rubber cover 10 is driven by a driving assembly, the driving assembly comprises a pneumatic cylinder 8, the piston end of the pneumatic cylinder 8 is fixedly installed with an adapter plate 9, the rubber cover 10 is installed on the adapter plate 9, the outer surface of the feeding channel 101 is fixedly installed with a fixing frame 11, and the pneumatic cylinder 8 is installed on the fixing frame 11, so that the feeding channel 101 is sealingly fed.

[0038] In actual use, the 3,5-dimethyl aniline is mixed with hydrochloric acid, and then is added into the reaction kettle body 1 through the feeding port on the feeding channel 101, the potassium fluoride solution is injected through the micro-channel distributor, then the pneumatic cylinder 8 is started, at this time, the piston end of the pneumatic cylinder 8 drives the adapter plate 9 to move, the adapter plate 9 drives the rubber cover 10 to move, until the rubber cover 10 is sealingly installed on the feeding channel 101, then the variable frequency motor 2 is started, at this time, the output shaft of the variable frequency motor 2 drives the stirring rod 3 to rotate, the stirring rod 3 drives the propeller blade 4, the turbine blade 5 and the anchor blade 6 to rotate, and axial, radial and tangential three-dimensional mixing is realized, meanwhile, the micro-channel fluorination agent distributor uniformly disperses the fluorination agent, after a period of time, the product is discharged through the inner cavity of the discharge port 102, during which, the polytetrafluoroethylene anticorrosive layer plays a role in corrosion resistance, so that the uniformity of the fluorination agent is improved, and the by-products are reduced.

[0039] The utility model provides a kind of synthetic reactor, and three-layer differentiation paddle (screw+turbo+anchor) combination is realized axial, radial and tangential three-dimensional mixing, cooperate micro-channel fluorination agent distributor, not only can improve fluorination agent dispersion uniformity, also can reduce by-product.

[0040] It should be understood that the use of these embodiments is only for illustration of the utility model and is not intended to limit the scope of protection of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various modifications, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A synthesis reactor characterized by: It includes: The inner cavity wall of the reaction kettle body (1) is coated with a polytetrafluoroethylene corrosion-resistant layer with a thickness of 1-2 mm. A feed channel (101) is installed on the top of the reaction kettle body (1) and communicates with the reaction kettle body (1). A discharge port (102) is installed at the bottom of the reaction kettle body (1) and communicates with the reaction kettle body (1); The stirring device includes a stirring rod (3) vertically arranged and rotatingly installed in the reaction kettle body (1). The stirring rod (3) is provided with a multi-layer structure paddle. The stirring rod (3) is driven by a variable frequency motor (2); The micro-channel fluorinating agent distributor is installed on the inner cavity bottom wall of the reaction kettle body (1) and is equidistantly arranged along the axial direction of the reaction kettle body (1). The micro-channel fluorinating agent distributor includes a porous ceramic plate (701) and a ring-shaped distribution pipe (702); The sealing device includes a rubber cover (10) sealingly installed and matched with the inner cavity of the feed channel (101). The rubber cover (10) is driven by a driving assembly.

2. The synthesis reactor of claim 1, wherein: The inner cavity wall of the feed channel (101) is fixedly installed with a partition plate (103), which divides the inner cavity of the feed channel (101) into a feed port and a fluorinating agent inlet.

3. The synthesis reactor of claim 1, wherein: The variable frequency motor (2) is installed on the top of the reaction kettle body (1), and the output shaft of the variable frequency motor (2) is drivingly connected with the stirring rod (3).

4. The synthesis reactor of claim 1, wherein: The multi-layer structure paddle includes upper, middle and lower layers. The upper layer is a spiral paddle (4), the middle layer is a turbine paddle (5), and the lower layer is an anchor paddle (6).

5. The synthesis reactor of claim 1, wherein: The micro-channel fluorinating agent distributor has a micro-hole diameter of 0.1-0.5 mm and a distribution density of 5-10 micro-holes per square centimeter.

6. The synthesis reactor of claim 1, wherein: The driving assembly includes a cylinder (8). The piston end of the cylinder (8) is fixedly installed with an adapter plate (9). The rubber cover (10) is installed on the adapter plate (9). The outer surface of the feed channel (101) is fixedly installed with a fixed frame (11). The cylinder (8) is installed on the fixed frame (11).

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