Butyl acrylate synthesis system
By optimizing the process flow of the butyl acrylate synthesis system, reducing the amount of butanol and using the heat of the residue incineration system, the cost and resource waste caused by excessive use of butanol in the prior art are solved, and efficient and economical butan acrylate production is achieved.
Patent Information
- Application Number
- CN202422310110.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In the prior art, during the production process of butyl acrylate, excessive use of butanol increases the cost of raw materials and the difficulty of separation and purification, and causes side reactions, resulting in waste of resources.
A butyl acrylate synthesis system is designed, including a depolymerization reactor, a depolymerization distillation tower, an esterification reactor, an esterification distillation tower, an alcohol recovery device, a water treatment system and a residue incineration system. By optimizing the process flow, the amount of butanol is used and the heat of the residue incineration system is used to achieve efficient utilization of resources.
It reduces production costs, improves economic benefits, and achieves a green and efficient butyl acrylate production model. The generation rate of butyl acrylate reaches 80% to 90%, the conversion rate of esterification reaction reaches 98% to 99%, and the butanol recovery rate is 70% to 85%.
Smart Images
Figure CN223170889U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of butyl acrylate esterification reaction, in particular to a butyl acrylate synthesis system. Background Technique
[0002] The production process of butyl acrylate is a typical reversible esterification reaction, and its chemical equilibrium is affected by various factors. To promote this reaction in the direction of product formation, according to Le Chatelier's principle, the industry generally adopts the strategy of excessive butanol. This approach effectively reduces the concentration of acrylic acid in the reaction system by providing more alcohol molecules, thus promoting the reaction to move in the forward direction and accelerating the formation of butyl acrylate. However, the excessive butanol increases the raw material cost, poses higher requirements for subsequent separation and purification processes, and will also trigger additional side reactions, increasing the difficulty of separation and refining, resulting in unnecessary waste of resources. Content of the Utility Model
[0003] The purpose of the utility model is to provide a butyl acrylate synthesis system, which has a more refined process control effect, improves the reaction conditions, enhances the separation technology, reduces the butanol dosage, and realizes a more green, efficient and sustainable production mode while ensuring economic benefits.
[0004] To achieve the above purpose, the technical solution provided by the utility model is as follows: a butyl acrylate synthesis system includes a depolymerization reaction kettle, a depolymerization rectification tower, an esterification reaction kettle, an esterification rectification tower, an alcohol recovery device, a water treatment system and a residue incineration system; the depolymerization reaction kettle is connected to the depolymerization rectification tower, the depolymerization rectification tower is connected to the esterification reaction kettle, the esterification reaction kettle is connected to the esterification rectification tower, the esterification rectification tower is connected to the alcohol recovery device, the alcohol recovery device is respectively connected to the esterification reaction kettle and the water treatment system, and the esterification rectification tower is connected to an intermediate product tank.
[0005] To reduce production costs and improve economic benefits, the technical solution provided by the utility model includes: the depolymerization reaction kettle is connected to the residue incineration system.
[0006] Further, the esterification reaction kettle is connected to the residue incineration system.
[0007] To provide a more refined process control effect, the technical solution provided by the utility model includes: a polymerization inhibitor solution tank is provided, and the polymerization inhibitor solution tank is connected to the depolymerization reaction kettle.
[0008] Further, the polymerization inhibitor solution tank is also connected to the depolymerization rectification tower.
[0009] To reduce the butanol dosage, the technical solution provided by the utility model includes: an alcohol recovery device is provided.
[0010] Furthermore, connect the alcohol recovery device to the esterification reaction kettle.
[0011] Furthermore, connect the vent gas trap to the alcohol recovery device.
[0012] To achieve a green and efficient sustainable production mode, the technical solution provided by the present utility model includes: connecting the alcohol recovery device to the water treatment system.
[0013] Furthermore, connect the depolymerization rectification tower to the water treatment system.
[0014] Furthermore, connect the alcohol recovery device to the residue incineration system.
[0015] The advantages and beneficial effects of the present utility model are as follows: A depolymerization reaction kettle is provided, which can depolymerize acrylic acid dimer and the like with a relatively high content in the acrylic acid heavy components and butyl acrylate heavy components to obtain acrylic acid, and depolymerize butyl butoxypropionate to obtain butanol. Acrylic acid and butanol are used as raw materials for the esterification reaction. By connecting the alcohol recovery device to the esterification reaction device, the recovered butanol is used as a raw material for the esterification reaction, reducing the consumption of acrylic acid and butanol.
[0016] The residue incineration system is arranged below the depolymerization reaction kettle, enabling the depolymerization reaction kettle to comprehensively utilize the steam waste heat generated by the incineration system. The depolymerization rectification tower is directly connected to the esterification reaction kettle, enabling the rectification tower to comprehensively utilize the heat of the residue incineration system, reducing resource waste and improving economic benefits;
[0017] Connecting the esterification reaction kettle, the alcohol recovery device to the residue incineration system, connecting the depolymerization rectification tower, the alcohol recovery device to the water treatment system, and connecting the alcohol recovery device to the vent gas trap not only makes full use of existing equipment but also makes the production process more efficient and green. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of a butyl acrylate synthesis system provided by the present utility model;
[0019] In the figure: 1 - depolymerization reaction kettle, 2 - depolymerization rectification tower, 3 - esterification reaction kettle, 4 - esterification rectification tower, 5 - alcohol recovery device, 6 - water treatment system, 7 - residue incineration system, 8 - intermediate product tank, 9 - inhibitor solution tank, 10 - catalyst solution tank, 11 - vent gas trap. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following further describes the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model. [[ID=�7]]
[0021] Embodiment
[0022] Add the acrylic acid heavy fraction and butyl acrylate heavy fraction to the depolymerization reactor 1. Set the temperature in the depolymerization reactor 1 to 130 - 240 °C and the pressure to -60 - -80 kPa for the depolymerization reaction. Depolymerize the acrylic acid dimer and butyl butoxypropionate to obtain acrylic acid, butyl acrylate, and butanol. The acrylic acid and butanol produced by the depolymerization can be used as raw materials to produce butyl acrylate. To prevent the re-polymerization of acrylic acid due to the reversible reaction, add an inhibitor from the inhibitor solution tank 9 to the depolymerization reactor 1 and the depolymerization rectification tower 2.
[0023] Transport the product through a pipeline to the depolymerization rectification tower 2. The depolymerization rectification tower 2 purifies the product and transfers the purified product through a pipeline to the esterification reactor 3 for the esterification reaction. The liquid impurities after rectification are transferred to the water treatment system 6 for treatment, and the viscous liquid is transferred through a pipeline to the residue incineration unit 7 for incineration.
[0024] There are acrylic acid and butanol raw materials in the esterification reactor 3. Add a catalyst from the catalyst solution tank 10 to the esterification reactor 3 and carry out the esterification reaction under the conditions of 80 - 115 °C, a pressure of -60 - -70 kPa, and an alcohol-acid molar ratio controlled at 1.2 - 1.4.
[0025] After the esterification reactor 3 synthesizes butyl acrylate, transfer the product through a pipeline to the esterification rectification tower 4 for purification. The esterification rectification tower 4 transfers the purified intermediate product of butyl acrylate through a pipeline to the intermediate product tank 8, and the remaining substances are transferred through a pipeline to the alcohol recovery device 5.
[0026] After the alcohol recovery device 5 collects and separates butanol from the impurities, transfer the butanol back to the esterification reactor 3 through a pipeline. The generated gaseous substances are collected by the vent trap 11, and the remaining liquid impurities are transferred through a pipeline to the water treatment system 6. The viscous liquid is transferred to the residue incineration system 7 for incineration treatment.
[0027] The residue incineration device 7 is connected to the depolymerization reactor 1 and the esterification reactor 3. The steam released by incinerating the residue is used for the esterification reactor 3, and the generated heat transfer oil is used for the depolymerization reaction of the depolymerization reactor 1, saving energy.
[0028] Through the above system for the synthesis of butyl acrylate, the sum of the mass fractions of the effective components of the product obtained by the depolymerization reaction and the depolymerization rectification, namely butyl acrylate and acrylic acid, can reach 80% - 90%. The conversion rate of acrylic acid in the esterification reaction can reach 98% - 99%, and there is also 3% - 5% of butyl butoxypropionate by mass fraction. During the alcohol recovery process, the mass fraction of butanol in the obtained product is 70% - 85%.
[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.
Claims
1. A butyl acrylate synthesis system, comprising an esterification reactor, an esterification rectification column, an alcohol recovery device, a water treatment system and a residue incineration system; The esterification reactor is connected to the esterification rectification column, the esterification rectification column is connected to the alcohol recovery device, the alcohol recovery device is respectively connected to the esterification reactor and the water treatment system, and the esterification rectification column is connected to an intermediate product tank; It is characterized in that: A depolymerization reactor and a depolymerization rectification column are further provided, the depolymerization reactor is connected to the depolymerization rectification column, and the depolymerization rectification column is connected to the esterification reactor.
2. The butyl acrylate synthesis system according to claim 1, wherein: A residue incineration system is further provided, and the residue incineration system is connected to the depolymerization reactor and / or the esterification reactor.
3. The butyl acrylate synthesis system according to claim 1, wherein: A vent trap is further provided, and the vent trap is connected to the alcohol recovery device.
4. The butyl acrylate synthesis system according to claim 1, characterized in that: Connect the depolymerization rectification column to the water treatment system.
5. The butyl acrylate synthesis system according to claim 1, wherein: Connect the alcohol recovery device to the residue incineration system.
6. The butyl acrylate synthesis system according to claim 1, characterized in that: A polymerization inhibitor solution tank is further provided, and the polymerization inhibitor solution tank is connected to the depolymerization reactor.
7. The butyl acrylate synthesis system according to claim 1, wherein: A polymerization inhibitor solution tank is further provided, and the polymerization inhibitor solution tank is connected to the depolymerization rectification column.
8. The butyl acrylate synthesis system according to claim 1, wherein: A catalyst solution tank is further provided, and the catalyst solution tank is connected to the esterification reactor.