Polysulfone polymer preparation device

Abstract

According to the polysulfone polymer preparation device provided by the utility model, the bed type reactor is arranged in the reaction kettle, and the acid-binding agent powder is fixedly filled in the bed type reactor, so that on one hand, the contact area between an acid-binding agent and circulating liquid is increased, and on the other hand, the insoluble acid-binding agent powder fixedly stays in the bed type reactor; according to the method, the separation step of the acid-binding agent and the polymerization liquid can be reduced, the time of the production process is shortened, the by-product and the unreacted acid-binding agent are separated after the reaction is finished, the by-product does not need to be further treated, the unreacted acid-binding agent can be continuously used, and the cost is saved. The multiple reaction bed layers are connected end to end to form a broken-line-shaped structure, the structure increases the specific surface area of the acid binding agent, and the reaction bed layers are obliquely arranged so that the flow speed of circulating liquid can be increased. Salifying and filtering are performed synchronously, so that the production time is greatly shortened, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer materials, in particular to a polysulfone polymer preparation device. Background Art

[0002] As a special polymer material, polysulfone is widely used in various fields such as aerospace, food, and medical equipment due to its good chemical stability, excellent heat resistance and mechanical properties.

[0003] At present, the most advanced production process of special polymer materials is the one-step synthesis method, which is mainly divided into the polymerization section and the post-processing section.

[0004] The main solid raw materials of the polymerization section, such as 4,4'-dichlorodiphenyl sulfone, bisphenol A, bisphenol S, biphenylene, potassium carbonate or potassium bicarbonate and other acid-binding agents, are polymerized in a liquid solvent. Common solvents include dimethyl sulfoxide, N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, etc. Toluene, xylene, etc. can be selected as dehydrating agents. During the reaction process, as the temperature rises, the main solid raw materials 4,4'-dichlorodiphenyl sulfone, bisphenol A, bisphenol S, biphenylene are dissolved in the solvent, while the acid-binding agents such as potassium carbonate or potassium bicarbonate are insoluble in the solvent. The reaction system forms a solid-liquid two-phase reaction system. The two-phase reaction system requires stirring form, fast speed, particle size of solid catalyst, small reactor diameter-to-height ratio, solid-liquid ratio, viscosity of polymerization liquid, etc., which increases the difficulty of reactor design and filtering equipment. After the reaction, the by-products and unreacted acid-binding agents are a mixture that needs to be further processed: dissolution, acidification, concentration, crystallization, drying, etc., which increases investment and production costs. Utility Model Content

[0005] The utility model provides a polysulfone polymer preparation device to solve the technical problems raised in the background technology.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A polysulfone polymer preparation device comprises a reactor, a bed-type reactor and a stirring mechanism arranged in the reactor; the reactor is provided with a bed-type reactor on the upper layer, the bed-type reactor comprises a porous support plate and a reaction bed layer located above the porous support plate, the reaction bed layer is provided with at least one layer, each of the reaction beds is fixedly filled with an acid binding agent, and the stirring mechanism is transversely arranged below the reaction bed layer; the reactor is provided with a circulating liquid outlet at the bottom, the reactor is provided with a circulating liquid inlet at the top, the circulating liquid outlet and the circulating liquid inlet are connected by a circulating pipeline, a circulating pump is installed on the circulating pipeline, and the circulating liquid inlet is connected to the feeding end of the bed-type reactor.

[0008] As a further preferred embodiment of the present invention, the reaction bed is inclined, and the inclination angle is 2-10°.

[0009] As a further preferred embodiment of the utility model, the reaction bed layer is provided with a filter cloth layer, an acid binding agent layer and a porous filter plate layer in order from top to bottom. Specifically, the reaction bed layer comprises a filter frame, the top and bottom of the filter frame are provided with a filter cloth and a porous filter plate, and the inside of the filter frame and between the filter cloth and the porous filter plate is filled with an acid binding agent.

[0010] As a further preferred embodiment of the present invention, the acid binding agent is a caustic alkali or a weak alkaline salt, further selected from any one or more of sodium carbonate, sodium hydroxide, and potassium carbonate.

[0011] As a further preferred embodiment of the present invention, when the bed reactor includes two or more reaction beds, the plurality of reaction beds are arranged in a vertical direction, and two adjacent reaction beds are connected end to end in a broken line. The circulating liquid entering the bed reactor from the circulating liquid inlet can flow through each reaction bed in sequence under the action of gravity, contact the acid binding agent in the reaction bed, fully form salts, polymerize, and the obtained polymerized liquid falls into the bottom of the kettle.

[0012] As a further preferred embodiment of the present invention, a liquid distributor is provided at the head and tail connection of two adjacent reaction beds, so that the circulating liquid from the upper reaction bed can evenly enter the next reaction bed.

[0013] As a further preferred embodiment of the present invention, both ends of the reaction bed layer and the porous support plate are provided with hanging ears, the top of the reactor is fixed with a support frame extending vertically downward, and the reaction bed layer and the porous support plate are detachably fixed to the inside of the support frame through the hanging ears.

[0014] As a further preferred embodiment of the present invention, the support frame is provided with a detachable buckle for fixing the ear.

[0015] As a further preferred embodiment of the present invention, the stirring mechanism includes a stirring motor, a rotating shaft and stirring blades. The stirring motor is fixed to the outside of the reactor. The output shaft of the stirring motor is connected to the rotating shaft. The rotating shaft passes through the side wall of the reactor and is located below the reaction bed. A plurality of stirring blades are connected to the rotating shaft.

[0016] As a further preferred embodiment of the present invention, the bottom of the reactor is arc-shaped, and a stirring space is formed inside for the stirring blades to rotate.

[0017] As a further preferred embodiment of the utility model, the circulating liquid inlet is provided on one side of the top of the reactor, and the non-condensable gas outlet is provided on the other side, and the non-condensable gas outlet is connected to the gas-liquid separation device through a pipeline. The gas-liquid separation device includes a condenser, a gas-liquid separator and a liquid outlet storage tank, the liquid inlet of the condenser is connected to the non-condensable gas outlet through a pipeline, the liquid outlet of the condenser is connected to the liquid inlet of the gas-liquid separator through a pipeline, and the liquid outlet of the gas-liquid separator is connected to the liquid outlet storage tank through a pipeline.

[0018] As a further preferred embodiment of the present invention, a filter press mechanism is further included, the filter press mechanism includes a filter press, a filter press plate and a hydraulic rod, the filter press is fixed on the outside of the top of the reactor, the filter press plate is obliquely arranged in the reaction chamber, and the inclination angle is consistent with the reaction bed layer, the output shaft of the filter press is connected to the hydraulic rod, and the hydraulic rod passes through the top of the reactor and is connected to the filter press plate. When the reaction is completed, the polymer solution is discharged from the reactor, and the residual reaction solution in the bed reactor can be removed by filter press.

[0019] Compared with the prior art, the utility model has the following advantages or technical effects:

[0020] A bed reactor is provided in the reactor, and the acid-binding agent powder is fixedly filled in the bed reactor. On the one hand, the contact area between the acid-binding agent and the circulating liquid is increased. On the other hand, the insoluble acid-binding agent powder is fixedly retained in the bed reactor, which can reduce the separation steps of the acid-binding agent and the polymer solution, shorten the production process time, and the by-products and the unreacted acid-binding agent are separated after the reaction. The by-products do not need to be further processed, and the unreacted acid-binding agent can continue to be used, saving costs. Multiple reaction beds are connected end to end to form a broken line structure, which increases the specific surface area of ​​the acid-binding agent. The reaction bed is tilted to increase the flow rate of the circulating liquid. Salt formation and filtration are carried out simultaneously, which greatly shortens the production time and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model and its features, shapes and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings.

[0022] Figure 1 It is a schematic diagram of the internal structure of a polysulfone polymer preparation device;

[0023] Figure 2 It is a schematic diagram of the structure of the porous filter plate of the reaction bed;

[0024] In the figure, 1, reactor, 2, circulating liquid outlet, 3, circulating liquid inlet, 4, circulating pump, 5, non-condensable gas outlet, 6, support frame, 7, filter press mechanism, 71, filter press, 72, filter press plate, 73, hydraulic rod, 8, porous support plate, 9, reaction bed, 91, filter frame, 92, porous filter plate, 93, liquid distributor, 10, hanging ear, 11, overflow port under the bed, 12, stirring mechanism, 13, condenser, 14, gas-liquid separator, 15, liquid outlet storage tank. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present invention.

[0026] Please refer to the attached Figure 1-Figure 2 The utility model provides a polysulfone polymer preparation device, comprising a reactor 1, a bed-type reactor and a stirring mechanism 12 arranged in the reactor 1. The bed-type reactor comprises a support frame 6, a porous support plate 8 and at least one reaction bed layer 9 located above the porous support plate 8, each reaction bed layer 9 is fixedly filled with an acid binding agent, and the stirring mechanism 12 is horizontally arranged below the reaction bed layer 9. A circulating liquid outlet 2 is arranged at the bottom of the reactor 1, and a circulating liquid inlet 3 and a non-condensable gas outlet 5 are arranged at the top of the reactor 1. The circulating liquid outlet 2 and the circulating liquid inlet 3 are connected through a circulating pipeline, and a circulating pump 4 is installed on the circulating pipeline. The circulating liquid inlet 3 is connected to the feed end of the bed-type reactor, and the non-condensable gas outlet 5 is connected to a gas-liquid separation device. An under-bed overflow port 11 is arranged between the bottom of the bed-type reactor and the porous support plate 8.

[0027] To further illustrate, each reaction bed layer 9 is provided with a filter cloth layer, an acid binding agent layer and a porous filter plate layer in order from top to bottom. Specifically, the reaction bed layer 9 comprises a filter frame 91, a filter cloth is provided on the top of the filter frame 91 to form a filter cloth layer, a porous filter plate 92 is provided on the bottom of the filter frame 91 to form a porous filter plate layer, and an acid binding agent is filled inside the filter frame 91 and between the filter cloth and the porous filter plate 92 to form an acid binding agent layer.

[0028] Further explanation, multiple reaction beds 9 are arranged along the vertical direction of the support frame 6, and adjacent reaction beds 9 are connected end to end in a zigzag shape. A liquid distributor 93 is provided at the end to end connection of adjacent reaction beds 9, so that the circulating liquid from the upper reaction bed can evenly enter the next reaction bed. The multi-layer zigzag structure increases the specific surface area of ​​the acid binding agent, and the reaction bed 9 is tilted to accelerate the flow rate of the circulating liquid.

[0029] Further explanation, both ends of the reaction bed 9 and the porous support plate 8 are provided with hanging ears 10, the top of the support frame 6 is fixed to the bottom of the upper cover of the reactor 1, and extends vertically downward, and the reaction bed 9 and the porous support plate 8 are detachably fixed to the inside of the support frame 6 through the hanging ears 10. The support frame 6 is provided with a plurality of detachable buckles for fixing the hanging ears 10, and there is a certain margin between the hanging ears 10 and the buckles, which can meet the requirements of the tilting and fixing of the multi-layer reaction bed in sequence. When the reaction is completed and the reaction by-products and the acid binding agent need to be removed, the reaction bed can also be moved by simple disassembly.

[0030] Further explanation, the stirring mechanism 12 includes a stirring motor, a rotating shaft and stirring blades. The stirring motor is fixed to the outside of the reactor 1. The output shaft of the stirring motor is connected to the rotating shaft. The rotating shaft passes through the side wall of the reactor 1 and is located below the reaction bed 9. A plurality of stirring blades are connected to the rotating shaft. The bottom of the reactor 1 is arc-shaped, and a stirring space for the stirring blades to rotate is formed inside. The device is provided with a stirring mechanism 12 below the bed reactor, so that salt formation and filtration are carried out simultaneously, which can greatly shorten the production time and reduce the production cost.

[0031] Further explanation, a circulating liquid inlet 3 is provided on one side of the top of the reactor 1, and a non-condensable gas outlet 5 is provided on the other side, and the non-condensable gas outlet 5 is connected to the gas-liquid separation device through a pipeline. The gas-liquid separation device includes a condenser 13, a gas-liquid separator 14 and a liquid outlet storage tank 15, the liquid inlet of the condenser 13 is connected to the non-condensable gas outlet 5 through a pipeline, the liquid outlet of the condenser 13 is connected to the liquid inlet of the gas-liquid separator 14 through a pipeline, and the liquid outlet of the gas-liquid separator 14 is connected to the liquid outlet storage tank 15 through a pipeline.

[0032] Further explanation, it also includes a filter press mechanism, which includes a filter press 71, a filter press plate 72 and a hydraulic rod 73. The filter press 71 is fixed on the top outside of the reactor 1, and the filter press plate 72 is obliquely arranged in the reactor 1, and the inclination angle is consistent with the reaction bed 9. The output shaft of the filter press 71 is connected to the hydraulic rod 73, and the hydraulic rod 73 passes through the top of the reactor 1 and is connected to the filter press plate 72. When the reaction is completed, the polymer solution is discharged from the reactor, and the reaction byproducts and the polymer solution in the unreacted acid binding agent in the bed reactor can be removed by filter pressing, and the byproducts and the unreacted acid binding agent are washed to obtain the byproducts, and the byproducts are directly dried and packaged, and the unreacted acid binding agent can be recycled.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A polysulfone polymer preparation device, It is characterized in that The invention comprises a reactor (1), a bed-type reactor and a stirring mechanism (12) arranged in the reactor (1); the reactor (1) is provided with a bed-type reactor on the upper layer, the bed-type reactor comprising a porous support plate (8) and a reaction bed layer (9) located above the porous support plate (8), the reaction bed layer (9) being provided with at least one layer, each reaction bed layer (9) being fixedly filled with an acid binding agent, and the stirring mechanism (12) being arranged transversely below the reaction bed layer (9); the bottom of the reactor (1) is provided with a circulating liquid outlet (2), the top of the reactor (1) is provided with a circulating liquid inlet (3), the circulating liquid outlet (2) and the circulating liquid inlet (3) are connected via a circulating pipeline, a circulating pump (4) is installed on the circulating pipeline, and the circulating liquid inlet (3) is connected to the feed end of the reactor.

2. A polysulfone polymer preparation device according to claim 1, It is characterized in that The reaction bed layer (9) is arranged inclined.

3. A polysulfone polymer preparation device according to claim 1, It is characterized in that The reaction bed layer (9) comprises a filter frame (91), the top and bottom of the filter frame (91) are provided with filter cloth and a porous filter plate (92), and an acid binding agent is filled inside the filter frame (91) and between the filter cloth and the porous filter plate (92).

4. A polysulfone polymer preparation device according to claim 1, It is characterized in that When the bed-type reactor comprises two or more reaction bed layers (9), the plurality of reaction bed layers (9) are arranged in a vertical direction, and two adjacent reaction bed layers (9) are connected end to end in a broken line shape.

5. A polysulfone polymer preparation device according to claim 4, It is characterized in that A liquid distributor (93) is provided at the end-to-end connection between two adjacent reaction bed layers (9).

6. A polysulfone polymer preparation device according to claim 1, It is characterized in that Both ends of the reaction bed layer (9) and the porous support plate (8) are provided with hanging ears (10), and a support frame (6) extending vertically downward is fixed to the top of the reaction kettle (1), and the reaction bed layer (9) and the porous support plate (8) are detachably fixed to the inside of the support frame (6) via the hanging ears (10).

7. A polysulfone polymer preparation device according to claim 1, It is characterized in that The stirring mechanism (12) comprises a stirring motor, a rotating shaft and stirring blades. The stirring motor is fixed outside the reactor (1). The output shaft of the stirring motor is connected to the rotating shaft. The rotating shaft passes through the side wall of the reactor (1) and is located below the reaction bed (9). The rotating shaft is connected to a plurality of stirring blades.

8. A polysulfone polymer preparation device according to claim 7, It is characterized in that The bottom of the reaction kettle (1) is arc-shaped, and a stirring space is formed inside for the stirring blades to rotate.

9. The polysulfone polymer preparation device according to claim 1, It is characterized in that The top side of the reactor (1) is provided with the circulating liquid inlet (3), and the other side is provided with a non-condensable gas outlet (5), and the non-condensable gas outlet (5) is connected to the gas-liquid separation device via a pipeline.

10. The polysulfone polymer preparation device according to claim 1, It is characterized in that The invention also comprises a filter press mechanism (7), wherein the filter press mechanism (7) comprises a filter press (71), a filter press plate (72) and a hydraulic rod (73); the filter press (71) is fixed to the outside of the top of the reactor (1); the filter press plate (72) is obliquely arranged in the reactor (1); the inclination angle is consistent with that of the reaction bed (9); the output shaft of the filter press (71) is connected to the hydraulic rod (73); and the hydraulic rod (73) passes through the top of the reactor (1) and is connected to the filter press plate (72).

Images