Polymerization inhibition reaction device for synthesizing butyl acrylate

Abstract

The utility model relates to the technical field of chemical synthesis, in particular to a polymerization inhibition reaction device for synthesizing butyl acrylate, the polymerization inhibition reaction device is provided with an acrylic acid storage tank and an n-butyl alcohol storage tank, the n-butyl alcohol storage tank is connected with a reactor through an n-butyl alcohol conveying pump and a pipeline, and the reactor is provided with a solid feeding port; the acrylic acid storage tank is connected with an intermittent pulse type emitter arranged at the top of the reactor through an acrylic acid conveying pump and a pipeline, an online monitoring system is arranged at the bottom of the reactor, the intermittent pulse type emitter and the online monitoring system are both connected with a controller, and the intermittent pulse type emitter and the online monitoring system are connected with the controller through the combined action of the intermittent pulse type emitter and the online monitoring system. Dynamic feeding of acrylic acid is realized, and the concentration of acrylic acid in unit time is effectively reduced, so that the risk of self-polymerization and other-polymerization of acrylic acid is remarkably reduced, and the safety and stability of reaction are improved; the production of a high-quality butyl acrylate product is facilitated, and the production efficiency and the economic benefit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis, in particular to a polymerization inhibition reaction device for synthesizing butyl acrylate. Background Art

[0002] Butyl acrylate is a colorless, transparent liquid with a strong characteristic odor. It is an important acrylic monomer. BAc has low-temperature flexibility, adhesion, hardness, water and oil resistance, and other properties. It is a very important acrylic monomer. These properties make this compound an attractive raw material for paint and coating formulations and several other products, such as adhesives, varnishes, and finishes for paper and textiles. It can also be used to produce sealants, plastics, elastomers, and is mainly used to produce coatings and copolymers. In addition, it can be used in the fields of cleaning products, antioxidants, amphoteric surfactants and water-based resins, and has broad industrial application prospects.

[0003] BAc is usually obtained by the esterification reaction between acrylic acid (AAc) and n-butanol (n-BuOH), with water as a byproduct. Among the many patented processes related to BAc synthesis, most focus on the first stage of the reactor, which is to catalyze the esterification reaction of AAc and n-BuOH in an acidic environment. Subsequently, in order to extract BAc from the reaction mixture, multiple distillation and recovery steps are required. However, there are multiple challenges in actual operation: first, the reaction is relatively slow, which leads to low production efficiency and increased energy consumption; second, due to the presence of various azeotropes, the thermodynamic behavior of the reaction system becomes complicated, which brings difficulties to the subsequent separation and purification steps; third, since the esterification reaction is a highly exothermic process, excessively high temperatures trigger uncontrolled self-accelerating polymerization reactions, which not only threaten production safety, but also cause AAc and BAc to polymerize under high temperature conditions, which seriously affects product quality. Summary of the invention

[0004] In order to solve the above problems, the present application provides an inhibition reaction device for synthesizing butyl acrylate, which is provided with an acrylic acid storage tank and a n-butanol storage tank, wherein the n-butanol storage tank is connected to a reactor via an n-butanol feed pump and a pipeline, a solid feeding port is provided on the reactor, the acrylic acid storage tank is connected to an intermittent pulse transmitter arranged on the top of the reactor via an acrylic acid feed pump and a pipeline, an online monitoring system is provided at the bottom of the reactor, and both the intermittent pulse transmitter and the online monitoring system are connected to a controller.

[0005] In one embodiment, a heating or insulation jacket is provided on the pipeline.

[0006] In one embodiment, the reactor is provided with a vacuum device, and the reaction system is in a negative pressure state after it is turned on.

[0007] In one embodiment, flow meters are provided after the n-butanol feed pump and the acrylic acid feed pump.

[0008] In one embodiment, a jacket is disposed outside the reactor, and the medium in the jacket is water or heat transfer oil.

[0009] In one embodiment, a circulation pipe is provided on the reactor, a circulation pump is provided on the circulation pipe, and the bottom of the reactor is connected to a product tank through a pipeline.

[0010] In one embodiment, the online monitoring system is a near-infrared online monitoring system.

[0011] In one embodiment, the acrylic acid storage tank is provided with a jacket or a heating device.

[0012] In one embodiment, the reactor is provided with a temperature sensor to monitor the reaction temperature in real time.

[0013] In one embodiment, the flow meter is an intelligent electromagnetic flow meter.

[0014] The beneficial effects of the utility model are:

[0015] The present application discloses an anti-polymerization reaction device for synthesizing butyl acrylate. The n-butanol storage tank delivers n-butanol to the reactor through the n-butanol delivery pump, and the acrylic acid in the acrylic acid storage tank is delivered to the intermittent pulse transmitter arranged on the top of the reactor through the acrylic acid delivery pump. The controller controls the operation of the intermittent pulse transmitter according to the preset program and the feedback of the online monitoring system to realize the dynamic feeding of acrylic acid. Through the intermittent pulse transmitter, acrylic acid is fed into the reactor in an intermittent manner and in a small amount, thereby reducing the concentration of acrylic acid per unit time; the online monitoring system installed on the reactor monitors the n-butanol concentration in the reactor in real time. The controller receives the feedback of the online monitoring system and adjusts the working state of the intermittent pulse transmitter according to the preset program and the real-time concentration information. Through the combined action of the intermittent pulse emitter and the online monitoring system, dynamic feeding of acrylic acid is achieved, which effectively reduces the concentration of acrylic acid per unit time, thereby significantly reducing the risk of acrylic acid self-polymerization and polymerization, and improving the safety and stability of the reaction; by accurately controlling the feed amount of acrylic acid, the uniformity and stability of the reaction are guaranteed, which is conducive to the production of high-quality butyl acrylate products. In addition, by accurately controlling the concentration of acrylic acid during the reaction process, unnecessary energy consumption and waste of raw materials are avoided, thereby improving production efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Explanation of symbols in the figure:

[0018] 1. Acrylic acid storage tank; 11. Acrylic acid feed pump;

[0019] 2. n-Butanol storage tank; 21. n-Butanol feed pump;

[0020] 3. Pipeline;

[0021] 4. Reactor; 41. Solid feeding port; 42. Jacket; 43. Circulation pipe; 44. Circulation pump;

[0022] 5. Intermittent pulse transmitter;

[0023] 6. Online monitoring system;

[0024] 7. Controller;

[0025] 8. Product tank. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] like Figure 1 As shown, a polymerization inhibition reaction device for synthesizing butyl acrylate is provided with an acrylic acid storage tank 1 and a n-butanol storage tank 2. The n-butanol storage tank 2 is connected to a reactor 4 via an n-butanol feed pump 21 and a pipeline 3. A solid feed port 41 is provided on the reactor 4. The acrylic acid storage tank 1 is connected to an intermittent pulse transmitter 5 arranged on the top of the reactor 4 via an acrylic acid feed pump 11 and a pipeline 3. The reactor 4 is provided with an online monitoring system 6. The intermittent pulse transmitter 5 and the online monitoring system 6 are both connected to a controller 7.

[0028] Specifically, the online monitoring system 6 is a near-infrared online monitoring system. The n-butanol storage tank 2 delivers n-butanol to the reactor 4 through the n-butanol feed pump 21, and the acrylic acid in the acrylic acid storage tank 1 is delivered to the intermittent pulse emitter 5 arranged at the top of the reactor 4 through the acrylic acid feed pump 11. The controller 7 controls the operation of the intermittent pulse emitter 5 according to the preset program and the feedback of the online monitoring system 6 to realize the dynamic feeding of acrylic acid. Through the intermittent pulse emitter 5, acrylic acid is fed into the reactor 4 in an intermittent manner and in a small amount, which reduces the acrylic acid concentration per unit time; the online monitoring system 6 installed at the bottom of the reactor 4 monitors the n-butanol concentration in the reactor 4 in real time. The controller 7 receives the feedback of the online monitoring system 6, and adjusts the working state of the intermittent pulse emitter 5 according to the preset program and real-time concentration information, that is, when the acrylic acid concentration in the reactor 4 reaches the preset upper limit, the controller 7 reduces the emission frequency of the intermittent pulse emitter 5 to reduce the acrylic acid feed amount; conversely, when the concentration is lower than the lower limit, the emission frequency is increased to increase the acrylic acid feed amount. Through the combined action of the intermittent pulse emitter 5 and the online monitoring system 6, dynamic feeding of acrylic acid is achieved, which effectively reduces the concentration of acrylic acid per unit time, thereby significantly reducing the risk of acrylic acid self-polymerization and polymerization, and improving the safety and stability of the reaction; by accurately controlling the feed amount of acrylic acid, the uniformity and stability of the reaction are guaranteed, which is conducive to the production of high-quality butyl acrylate products. In addition, by accurately controlling the concentration of acrylic acid during the reaction process, unnecessary energy consumption and waste of raw materials are avoided, thereby improving production efficiency and economic benefits.

[0029] like Figure 1 As shown, the acrylic acid storage tank 1 is provided with a jacket or a heating device (not shown in the figure).

[0030] Specifically, acrylic acid begins to crystallize below 15° C. The acrylic acid storage tank 1 is provided with a jacket or a heating device mainly to keep the acrylic acid at a constant temperature. By maintaining the temperature in the storage tank by a heating or insulation jacket, acrylic acid can be effectively prevented from crystallizing due to low temperature, thereby avoiding the blockage of the pump cavity and pipeline during the material transportation process, and ensuring safe production.

[0031] like Figure 1 As shown, the pipeline 3 is provided with a heating or insulation jacket (not shown in the figure).

[0032] Specifically, the heating or insulation jacket is provided on the pipeline 3 mainly to ensure that the liquid transported in the pipeline 3 can maintain a constant temperature during transportation. Acrylic acid begins to crystallize below 15°C. By maintaining the temperature in the pipeline through the heating or insulation jacket, the polymerization reaction of acrylic acid during transportation can be effectively prevented, thereby ensuring the smooth progress of the production process, ensuring the continuity and stability of the production process, and improving production efficiency.

[0033] like Figure 1 As shown, flow meters (not shown in the figure) are arranged behind the n-butanol feed pump 21 and the acrylic acid feed pump 11.

[0034] Specifically, in the process of synthesizing butyl acrylate, the ratio of n-butanol to acrylic acid has a direct impact on the reaction results and product quality. By setting up a flow meter, the flow ratio of the two raw materials can be accurately controlled to ensure that the reaction proceeds according to the preset formula, thereby obtaining better product quality and reaction efficiency; real-time monitoring of raw material flow, timely detection and correction of flow anomalies, avoid over-delivery, and ensure production safety.

[0035] like Figure 1 As shown, a jacket 42 is disposed outside the reactor 4, and the medium in the jacket 42 is water or heat transfer oil.

[0036] Specifically, in the process of synthesizing butyl acrylate, since the reaction is an exothermic reaction, the temperature of the reactor needs to be accurately controlled to avoid polymerization or decomposition of raw materials caused by excessively high temperatures. Therefore, by providing the jacket 42, the temperature of the reactor can be effectively controlled to ensure the smooth progress of the reaction and the quality of the product. By circulating a heating medium (such as water or thermal oil), it can be ensured that the temperature inside the reactor is uniformly distributed, avoiding the occurrence of local overheating or supercooling, promoting the uniform progress of the reaction, and improving reaction efficiency and product quality are of vital importance.

[0037] like Figure 1 As shown, the reactor 4 is provided with a vacuum device (not shown in the figure) on the top of the reactor.

[0038] Specifically, by the vacuum device disposed on the top of the reactor 4, the reaction system is in a negative pressure state after being turned on, which can significantly reduce the reaction temperature, prevent the self-polymerization and polymerization of acrylic acid under high temperature conditions, reduce the occurrence of side reactions, ensure the purity of the product, reduce the difficulty of post-processing separation and purification, and at the same time reduce energy consumption and wastewater, which is safe and environmentally friendly.

[0039] like Figure 1 As shown, the reactor 4 is provided with a circulation pipe 43, the circulation pipe 43 is provided with a circulation pump 44, and the bottom of the reactor 4 is connected to the product tank 8 through a pipeline.

[0040] Specifically, by providing a circulation pump 44 and a circulation pipe 43, it is possible to ensure that the reaction liquid in the reactor 4 is evenly distributed and mixed, so that the reaction liquid in each part can fully participate in the reaction, thereby improving the reaction efficiency and product quality. Through the circulation flow, the raw materials in the reactor 4 can participate in the reaction more evenly, reducing the side reactions and impurity generation caused by local over-concentration or over-diluted, thereby optimizing the quality of the product. When the reaction is completed, the reaction liquid flows from the bottom of the reactor 4 through the pipeline into the product tank 8 for collection, storage or further processing.

[0041] The present application discloses a polymerization inhibition reaction device for synthesizing butyl acrylate, wherein n-butanol storage tank 2 delivers n-butanol to reactor 4 through n-butanol feed pump 21, and acrylic acid in acrylic acid storage tank 1 is delivered to intermittent pulse emitter 5 arranged at the top of reactor 4 through acrylic acid feed pump 11, and controller 7 controls the operation of intermittent pulse emitter 5 according to the preset program and feedback from online monitoring system 6, so as to realize dynamic feeding of acrylic acid. Acrylic acid is fed into reactor 4 in an intermittent manner and in a small amount through intermittent pulse emitter 5, thereby reducing the concentration of acrylic acid per unit time; online monitoring system 6 installed at the bottom of reactor 4 monitors the concentration of acrylic acid in reactor 4 in real time. Controller 7 receives feedback from online monitoring system 6, and adjusts the working state of intermittent pulse emitter 5 according to the preset program and real-time concentration information. Through the combined action of the intermittent pulse emitter 5 and the online monitoring system 6, dynamic feeding of acrylic acid is achieved, which effectively reduces the concentration of acrylic acid per unit time, thereby significantly reducing the risk of acrylic acid self-polymerization and polymerization, and improving the safety and stability of the reaction; by accurately controlling the feed amount of acrylic acid, the uniformity and stability of the reaction are guaranteed, which is conducive to the production of high-quality butyl acrylate products. In addition, by accurately controlling the concentration of acrylic acid during the reaction process, unnecessary energy consumption and waste of raw materials are avoided, thereby improving production efficiency and economic benefits.

[0042] 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.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A polymerization inhibition reaction device for synthesizing butyl acrylate, comprising an acrylic acid storage tank (1) and an n-butanol storage tank (2), wherein the n-butanol storage tank (2) is connected to a reactor (4) via an n-butanol feed pump (21) and a pipeline (3), and the reactor (4) is provided with a solid feed port (41), characterized in that: The acrylic acid storage tank (1) is connected to an intermittent pulse transmitter (5) arranged at the top of the reactor (4) through an acrylic acid feed pump (11) and a pipeline (3); an online monitoring system (6) is arranged at the bottom of the reactor (4); and both the intermittent pulse transmitter (5) and the online monitoring system (6) are connected to a controller (7).

2. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The pipeline (3) is provided with a heating or insulation jacket.

3. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The reactor (4) is provided with a vacuum device, and when it is turned on, the reaction system is in a negative pressure state.

4. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: Flow meters are arranged behind the n-butanol feeding pump (21) and the acrylic acid feeding pump (11).

5. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The reactor (4) is provided with a jacket (42) outside, and the medium in the jacket (42) is water or heat transfer oil.

6. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The reactor (4) is provided with a circulation pipe (43), and the circulation pipe (43) is provided with a circulation pump (44). The bottom of the reactor (4) is connected to a product tank (8) through a pipeline.

7. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The online monitoring system (6) is a near-infrared online monitoring system.

8. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The acrylic acid storage tank (1) is provided with a jacket or a heating device.

9. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 1, characterized in that: The reactor (4) is provided with a temperature sensor to monitor the reaction temperature in real time.

10. The polymerization inhibition reaction device for synthesizing butyl acrylate according to claim 4, characterized in that: The flow meter is an intelligent electromagnetic flow meter.

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