Distillation and purification device for bisphenol A type epoxy resin

Abstract

The utility model discloses a bisphenol A type epoxy resin distillation purification device, which comprises a film evaporator, a first storage tank, a pump body, a molecular distiller and a collection container, the first storage tank is arranged under the film evaporator, the molecular distiller is arranged on one side of the film evaporator, and the collection container is arranged on the other side of the film evaporator. The pump body is arranged between the first storage tank and the molecular distiller, the collecting container is arranged on the side, away from the pump body, of the molecular distiller, a feeding pipe is fixedly connected to the position, close to the top of the film evaporator, of the surface of the film evaporator, and a first discharging pipe is fixedly connected to the bottom of the film evaporator. According to the utility model, the film evaporator and the molecular distiller are combined, the film evaporator can preliminarily separate low-boiling-point impurities and heavy components, and the molecular distiller further purifies materials, so that multistage purification of bisphenol A type epoxy resin is realized, and the purity of products is effectively improved; the requirements of high-end fields on the performance stability of materials are met.

Description

Technical Field

[0001] This utility model relates to the field of polymer material purification technology, specifically to a distillation purification device for bisphenol A type epoxy resin. Background Technology

[0002] Bisphenol A type epoxy resin is the most widely used epoxy resin, but commercially available products often contain impurities such as low-boiling-point solvents, unreacted monomers, and high-boiling-point polymers, affecting its performance stability in high-end fields (such as electronic packaging and insulating materials). Traditional purification methods (such as rotary evaporation and solvent crystallization) suffer from low separation efficiency, high energy consumption, and easy decomposition of heat-sensitive substances. Molecular distillation technology, due to its high-efficiency separation characteristics at low temperatures and high vacuum, has gradually become the preferred method for purifying heat-sensitive substances. However, existing equipment is mostly designed for single-component separation and cannot meet the needs of multi-stage purification of bisphenol A type epoxy resin.

[0003] The patented system for removing impurities from bisphenol A type epoxy resin disclosed in announcement number CN213895679U removes water and unreacted epichlorohydrin from the reaction mixture by vacuum distillation using a rotary evaporator, causing unreacted sodium hydroxide and generated sodium chloride to crystallize out. Then, a high-efficiency automatic discharge vibrating screen separates and removes the unreacted sodium hydroxide and generated sodium chloride solid particles from the mixture, and automatically discharges the material from the upper and lower layers of the screen, achieving highly efficient removal and separation of impurities from bisphenol A type epoxy resin.

[0004] However, the aforementioned bisphenol A type epoxy resin impurity removal and separation system mainly focuses on impurity removal and separation, and is relatively limited in terms of multi-stage purification, which may not meet the requirements of high-end fields for extremely high purity.

[0005] Therefore, it is necessary to invent a distillation purification device for bisphenol A type epoxy resin to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a distillation and purification device for bisphenol A type epoxy resin to solve the problems mentioned above.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a distillation purification device for bisphenol A type epoxy resin, comprising a thin-film evaporator, a primary storage tank, a pump body, a molecular distillation apparatus, and a collection container. The primary storage tank is located directly below the thin-film evaporator, the molecular distillation apparatus is located to one side of the thin-film evaporator, the pump body is located between the primary storage tank and the molecular distillation apparatus, and the collection container is located on the side of the molecular distillation apparatus away from the pump body. A feeding pipe is fixedly connected to the surface of the thin-film evaporator near its top, and a discharge pipe is fixedly connected to the bottom of the thin-film evaporator. The output end of the first feed pipe extends into the interior of the first storage tank. The input end of the pump body is fixedly connected to a suction pipe, which extends into the interior of the first storage tank. The output end of the pump body is fixedly connected to a feeding pipe, which extends into the interior of the molecular distillation apparatus. A second feed pipe is fixedly connected to the surface of the molecular distillation apparatus near its bottom. A first outlet pipe is fixedly connected to the top of the molecular distillation apparatus. The output end of the first outlet pipe extends into the interior of the collection container. A third feed pipe is fixedly connected to the surface of the collection container near its bottom.

[0008] By setting up a thin-film evaporator and a molecular distillation apparatus, epoxy resin raw materials can be efficiently purified through two steps: thin-film evaporation and molecular distillation, thereby improving the purity and quality of the product.

[0009] Preferably, a second storage tank is provided on the side of the thin-film evaporator away from the molecular distillation apparatus.

[0010] Storage tank No. 2 can be used to store low-boiling-point impurities that have volatilized after the initial treatment by thin-film evaporation.

[0011] Preferably, a second outlet pipe is fixedly connected to the top of the thin-film evaporator, and the output end of the second outlet pipe extends into the interior of the second storage tank.

[0012] By setting up a second outlet pipe, low-boiling-point impurities volatilized inside the thin-film evaporator can be introduced into the second storage tank, thus realizing material transfer between the thin-film evaporator and the second storage tank.

[0013] Preferably, a No. 4 discharge pipe is fixedly connected to the surface of the No. 2 storage tank near its bottom.

[0014] A fourth discharge pipe was added near the bottom of the No. 2 storage tank. This design facilitates the smooth discharge of materials from the No. 2 storage tank.

[0015] Preferably, a control valve is installed in the middle of each of the No. 1 discharge pipe, the extraction pipe, the feeding pipe, the No. 2 discharge pipe, the No. 1 outlet pipe, the No. 3 discharge pipe, the No. 2 outlet pipe, and the No. 4 discharge pipe.

[0016] The control valve is designed to allow operators to easily control the on / off status of each pipeline, enabling precise control and regulation of materials.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] By combining a thin-film evaporator and a molecular distillation unit, the thin-film evaporator can initially separate low-boiling-point impurities and heavy components, while the molecular distillation unit further purifies the material, achieving multi-stage purification of bisphenol A type epoxy resin, effectively improving the purity of the product and meeting the requirements of high-end fields for material performance stability. Attached Figure Description

[0019] Figure 1 This is a first-view overall structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0021] Figure 3 This is a schematic diagram of the structure of the thin-film evaporator of this utility model;

[0022] Figure 4 This is a schematic diagram of the pump body of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Thin-film evaporator; 2. Storage tank No. 1; 3. Pump body; 4. Molecular distillation apparatus; 5. Collection container; 6. Feed pipe; 7. Feed pipe No. 1; 8. Extraction pipe; 9. Feeding pipe; 10. Feed pipe No. 2; 11. Outlet pipe No. 1; 12. Feed pipe No. 3; 13. Storage tank No. 2; 14. Outlet pipe No. 2; 15. Feed pipe No. 4. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides, for example Figure 1-4The apparatus shown is a distillation purification device for bisphenol A type epoxy resin, comprising a thin-film evaporator 1, a primary storage tank 2, a pump body 3, a molecular distillation apparatus 4, and a collection container 5. The primary storage tank 2 is located directly below the thin-film evaporator 1, the molecular distillation apparatus 4 is located to one side of the thin-film evaporator 1, the pump body 3 is located between the primary storage tank 2 and the molecular distillation apparatus 4, and the collection container 5 is located on the side of the molecular distillation apparatus 4 away from the pump body 3. A feed pipe 6 is fixedly connected to the surface of the thin-film evaporator 1 near its top, and a discharge pipe 7 is fixedly connected to the bottom of the thin-film evaporator 1. The discharge pipe 7... The pump body 3 has an outlet end that extends into the interior of the first storage tank 2. The pump body 3 has an input end that is fixedly connected to a suction pipe 8, which extends into the interior of the first storage tank 2. The pump body 3 has an output end that is fixedly connected to a feeding pipe 9, which extends into the interior of the molecular distillation apparatus 4. The molecular distillation apparatus 4 has a second discharge pipe 10 fixedly connected to its surface near its bottom. The molecular distillation apparatus 4 has a first outlet pipe 11 fixedly connected to its top, which extends into the interior of the collection container 5. The collection container 5 has a third discharge pipe 12 fixedly connected to its surface near its bottom.

[0027] In one aspect of this embodiment, a second storage tank 13 is provided on the side of the thin-film evaporator 1 away from the molecular distillation apparatus 4. A second outlet pipe 14 is fixedly connected to the top of the thin-film evaporator 1, and the output end of the second outlet pipe 14 extends into the interior of the second storage tank 13. A fourth feed pipe 15 is fixedly connected to the surface of the second storage tank 13 near its bottom. Control valves are installed in the middle of the first feed pipe 7, the extraction pipe 8, the feeding pipe 9, the second feed pipe 10, the first outlet pipe 11, the third feed pipe 12, the second outlet pipe 14, and the fourth feed pipe 15.

[0028] Working principle of this utility model:

[0029] Refer to the instruction manual appendix Figure 1-4 When using this utility model, firstly, the bisphenol A type epoxy resin raw material to be purified is introduced into the thin film evaporator 1 through the feeding pipe 6. The thin film evaporator 1 is used to perform preliminary evaporation treatment on the raw material to separate low boiling point impurities and heavy components. The control valve on the second outlet pipe 14 is opened, and the low boiling point impurities are introduced into the second storage tank 13 for temporary storage through the second outlet pipe 14. The heavy components are collected at the bottom of the thin film evaporator 1. The control valve on the first discharge pipe 7 is opened, and the heavy components are discharged into the first storage tank 2 for temporary storage through the first discharge pipe 7.

[0030] Next, the pump body 3 is started and the control valves on the extraction pipe 8 and the feed pipe 9 are opened. The material is extracted from the No. 1 storage tank 2 through the extraction pipe 8 and transported to the molecular distillation unit 4 through the feed pipe 9. The molecular distillation unit 4 uses its high-efficiency separation characteristics under low temperature and high vacuum to further purify the material and separate high-purity bisphenol A epoxy resin. The purified resin enters the collection container 5 through the No. 1 outlet pipe 11 for collection, while the remaining impurities and incompletely evaporated substances are collected at the bottom of the molecular distillation unit 4 and can be discharged through the No. 2 discharge pipe 10.

[0031] Throughout the distillation and purification process, control valves in each pipeline can be opened or closed as needed to adjust the flow and direction of the material, ensuring stable operation and efficient purification of the entire unit.

Claims

1. A distillation purification apparatus for bisphenol A type epoxy resin, comprising a thin-film evaporator (1), a first storage tank (2), a pump body (3), a molecular distillation apparatus (4), and a collection container (5), characterized in that: The No. 1 storage tank (2) is located directly below the thin-film evaporator (1), the molecular distillation apparatus (4) is located on one side of the thin-film evaporator (1), the pump body (3) is located between the No. 1 storage tank (2) and the molecular distillation apparatus (4), the collection container (5) is located on the side of the molecular distillation apparatus (4) away from the pump body (3), a feeding pipe (6) is fixedly connected to the surface of the thin-film evaporator (1) near its top, a No. 1 discharge pipe (7) is fixedly connected to the bottom of the thin-film evaporator (1), the output end of the No. 1 discharge pipe (7) extends into the interior of the No. 1 storage tank (2), and the input end of the pump body (3) is fixedly connected to... A suction pipe (8) is connected to the pump body (3), the input end of which extends into the first storage tank (2). A feed pipe (9) is fixedly connected to the output end of the pump body (3), the output end of which extends into the molecular distillation apparatus (4). A second discharge pipe (10) is fixedly connected to the surface of the molecular distillation apparatus (4) near its bottom. A first outlet pipe (11) is fixedly connected to the top of the molecular distillation apparatus (4), the output end of which extends into the collection container (5). A third discharge pipe (12) is fixedly connected to the surface of the collection container (5) near its bottom.

2. The distillation purification apparatus for bisphenol A type epoxy resin according to claim 1, characterized in that: A second storage tank (13) is provided on the side of the thin film evaporator (1) away from the molecular distillation apparatus (4).

3. The distillation purification apparatus for bisphenol A type epoxy resin according to claim 2, characterized in that: The top of the thin film evaporator (1) is fixedly connected to a second outlet pipe (14), and the output end of the second outlet pipe (14) extends into the interior of the second storage tank (13).

4. The distillation purification apparatus for bisphenol A type epoxy resin according to claim 3, characterized in that: The No. 4 discharge pipe (15) is fixedly connected to the surface of the No. 2 storage tank (13) near its bottom.

5. The distillation purification apparatus for bisphenol A type epoxy resin according to claim 4, characterized in that: Control valves are installed in the middle of the No. 1 discharge pipe (7), the extraction pipe (8), the feeding pipe (9), the No. 2 discharge pipe (10), the No. 1 outlet pipe (11), the No. 3 discharge pipe (12), the No. 2 outlet pipe (14), and the No. 4 discharge pipe (15).

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