Continuous fluorination reaction system

Abstract

The utility model discloses a continuous fluorination reaction system which comprises a feeding assembly and a reaction assembly, the feeding assembly is connected with the reaction assembly through a pipeline, the feeding assembly is formed by connecting a plurality of mixing kettles in parallel, and the reaction assembly is formed by connecting a plurality of reaction kettles in series. According to the continuous fluorination reaction system provided by the utility model, a plurality of mixing kettles are used for mixing and feeding materials into the reaction kettles in turn, so that continuous reaction and no interruption in the reaction kettles are ensured, meanwhile, the whole system works in a totally closed manner, workers cannot be in contact with toxic raw materials during production, the production efficiency is high, the labor intensity is low, and the product quality is stable.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a continuous fluorination reaction system. Background Technology

[0002] Fluorination is a common and widely used reaction type, with numerous applications in the fields of pharmaceuticals, pesticides, and other fine chemicals.

[0003] In related technologies, traditional batch reactors are often used for intermittent operation, which not only results in low output but also makes the product quality prone to fluctuation. Furthermore, the raw material for the fluorination reaction, triethylamine trihydrofluoride, is highly toxic and corrosive. Therefore, there is a need to provide an efficient, safe, and continuous fluorination reaction system. Utility Model Content

[0004] The purpose of this invention is to propose a continuous fluorination reaction system to solve the problem of difficulty in carrying out efficient, safe and continuous fluorination reactions in the prior art.

[0005] Therefore, this utility model provides a continuous fluorination reaction system, including: a feeding component and a reaction component, wherein the feeding component and the reaction component are connected by a pipeline, the feeding component is composed of a number of mixing vessels connected in parallel, and the reaction component is composed of a number of reaction vessels connected in series.

[0006] Preferably, the mixing vessel is provided with a first stirring mechanism inside, a first feed inlet is provided at the top of the mixing vessel, and a first discharge outlet is provided at the bottom of the mixing vessel.

[0007] Preferably, the first discharge port is provided with a raw material mixing bottom valve and a mixing shut-off valve.

[0008] Preferably, the reactor is provided with a second stirring mechanism inside, a second feed inlet is provided at the bottom of the reactor, and a second discharge outlet is provided on the side of the reactor.

[0009] Preferably, in a series of reactors, the second inlet of the first reactor is connected to the feeding assembly via a pipeline, and the second inlet of each subsequent reactor is connected to the second outlet of the preceding reactor via a pipeline.

[0010] Preferably, a mass metering pump is installed on the pipeline between the feeding component and the reaction component.

[0011] Preferably, a mixing preheater is provided on the pipeline between the feeding component and the reaction component.

[0012] Preferably, the mixing vessel is provided with a first vent at the top, and the reaction vessel is provided with a second vent at the top.

[0013] Preferably, it also includes an exhaust gas recovery device, wherein the first exhaust port and the second exhaust port are connected to the exhaust gas recovery device via pipelines.

[0014] Preferably, a condenser is provided at the second air outlet.

[0015] Beneficial effects:

[0016] 1. This utility model provides a continuous fluorination reaction system, which uses multiple mixing tanks to mix materials in turn and feed them into the reaction tank, ensuring that the reaction in the reaction tank is continuous and uninterrupted. At the same time, the entire system operates in a fully enclosed manner, so workers will not come into contact with toxic raw materials during production. It has high production efficiency, low labor intensity, and stable product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the pipeline for a continuous fluorination reaction system provided by this utility model.

[0019] In the figure, 1-mixing vessel, 11-first stirring mechanism, 12-first feed inlet, 13-first discharge outlet, 14-first gas outlet, 15-bottom valve of raw material mixing vessel, 16-mixing shut-off valve, 2-reaction vessel, 21-second stirring mechanism, 22-second feed inlet, 23-second discharge outlet, 24-second gas outlet, 3-mass metering pump, 4-mixing preheater, 5-tail gas recovery device, 6-condenser. Detailed Implementation

[0020] The following detailed description of preferred embodiments of the present invention, along with the included examples, will make the content of the present invention more readily understood. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, the definitions in this specification shall prevail.

[0021] Example 1:

[0022] Provided such as Figure 1The continuous fluorination reaction system shown includes a feeding assembly and a reaction assembly. The feeding assembly and the reaction assembly are connected by a pipeline. The feeding assembly consists of two mixing vessels 1 connected in parallel, and the reaction assembly consists of three reaction vessels 2 connected in series. A mass metering pump 3 and a mixing preheater 4 are installed on the pipeline between the feeding assembly and the reaction assembly.

[0023] The mixing vessel 1 is equipped with a first stirring mechanism 11. A first feed inlet 12 is located at the top of the mixing vessel 1, and a first discharge outlet 13 is located at the bottom. A first vent 14 is located at the top of the mixing vessel 1. A raw material mixing vessel bottom valve 15 and a mixing shut-off valve 16 are located at the first discharge outlet 13. Two mixing vessels 1 operate alternately for mixing; one mixing vessel 1 completes mixing and supplies raw materials to the reaction assembly, while the other mixing vessel 1 remains in standby mode. The number of mixing vessels 1 can be adjusted according to actual production conditions to achieve the functions described in this invention. The first stirring mechanism 11 uses a motor to drive a stirring rod to rotate and stir the raw materials in the mixing vessel 1.

[0024] The reactor 2 is equipped with a second stirring mechanism 21 inside. A second feed inlet 22 is located at the bottom of the reactor 2, a second discharge outlet 23 is located on the side of the reactor 2, and a second vent 24 is located at the top of the reactor 2. In a series of reactors 2, the second feed inlet 22 of the first reactor 2 is connected to the feeding assembly via a pipeline, and the second feed inlet 22 of each subsequent reactor 2 is connected to the second discharge outlet 23 of the preceding reactor 2 via a pipeline. The number of reactors 2 can be adjusted according to actual production conditions to achieve the functions of this invention. The second stirring mechanism 21 uses a motor to drive a stirring rod to stir the raw materials inside the reactor 2.

[0025] It also includes an exhaust gas recovery device 5, with the first exhaust port 14 and the second exhaust port 24 connected to the exhaust gas recovery device 5 via pipelines. A condenser 6 is installed at the second exhaust port 24. The exhaust gas recovery device 5 recovers the exhaust gas generated by the reaction, and its structure is existing technology; this utility model does not specifically limit it.

[0026] Working principle: The second stirring mechanism 21 in reactor 2 stirs the mixture. The bottom valve 15 and the mixing shut-off valve 16 of one mixing vessel 1 are opened, and the mass metering pump 3 and the mixing preheater 4 are turned on. The raw materials and triethylamine trihydrofluoride are added to the raw material mixing vessel 1 and mixed for a period of time. The material is then preheated in the mixing preheater 4 by adjusting the feeding speed through the mass metering pump. The preheated material continuously enters the first reactor 2 through the second inlet 22 at the bottom of the first reactor 2 for reaction. The reaction liquid in the first reactor 2 is transferred to the second inlet 22 of the second reactor 2 through the second outlet 23 of the first reactor 2, and so on, until the final product is obtained at the second outlet 23 of the third reactor 2. The two mixing vessels 1 alternately perform mixing; while one is conveying raw materials, the other mixing vessel 1 is in standby mode. The exhaust gas generated during mixing and reaction is discharged through the first outlet 14 and the second outlet 24, and then enters the exhaust gas recovery device 5 for treatment.

Claims

1. A continuous fluorination reaction system, characterized in that, include: The feeding assembly and the reaction assembly are connected by pipelines. The feeding assembly consists of several mixing vessels connected in parallel, and the reaction assembly consists of several reaction vessels connected in series.

2. The continuous fluorination reaction system according to claim 1, characterized in that, The mixing vessel is equipped with a first stirring mechanism inside, a first feed inlet is provided at the top of the mixing vessel, and a first discharge outlet is provided at the bottom of the mixing vessel.

3. The continuous fluorination reaction system according to claim 2, characterized in that, The first discharge port is equipped with a raw material mixing bottom valve and a mixing shut-off valve.

4. The continuous fluorination reaction system according to claim 1, characterized in that, The reactor is equipped with a second stirring mechanism inside, a second feed inlet at the bottom, and a second discharge outlet on the side.

5. A continuous fluorination reaction system according to claim 4, characterized in that, In a series of reactors, the second inlet of the first reactor is connected to the feeding assembly via a pipeline, and the second inlet of each subsequent reactor is connected to the second outlet of the preceding reactor via a pipeline.

6. The continuous fluorination reaction system according to claim 1, characterized in that, A mass metering pump is installed on the pipeline between the feeding component and the reaction component.

7. A continuous fluorination reaction system according to claim 1 or 6, characterized in that, A mixing preheater is installed on the pipeline between the feeding component and the reaction component.

8. The continuous fluorination reaction system according to claim 1, characterized in that, The mixing vessel is provided with a first vent at the top, and the reaction vessel is provided with a second vent at the top.

9. A continuous fluorination reaction system according to claim 8, characterized in that, It also includes an exhaust gas recovery device, and the first exhaust port and the second exhaust port are connected to the exhaust gas recovery device through pipelines.

10. A continuous fluorination reaction system according to claim 8, characterized in that, A condenser is installed at the second air outlet.

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