CN215842990U - Stirring system of sulfone polymer - Google Patents
Stirring system of sulfone polymer Download PDFInfo
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- CN215842990U CN215842990U CN202122294600.1U CN202122294600U CN215842990U CN 215842990 U CN215842990 U CN 215842990U CN 202122294600 U CN202122294600 U CN 202122294600U CN 215842990 U CN215842990 U CN 215842990U
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Abstract
The utility model relates to a stirring system of a sulfone polymer, which comprises a reaction kettle and a stirrer, wherein the stirrer comprises a sleeve, a stirring shaft and a spiral blade, the stirring shaft is arranged in the sleeve and drives the spiral blade to carry out counter-axial flow stirring on materials in the reaction kettle, and the ratio of the distance l from the outer edge of the sleeve to the inner wall of the reaction kettle to the radius d of the stirrer is more than or equal to 0.3 and less than or equal to 0.6. The stirring system can guide the materials in the reaction kettle towards the upper part of the reaction kettle by overcoming gravity sedimentation, and the materials flow towards the bottom of the reaction kettle by utilizing the gravity sedimentation, so that the materials in the reaction kettle are fully and uniformly mixed up and down to perform a reverse axial flow stirring effect, particles are uniformly suspended in the system to avoid incomplete reaction caused by local accumulation of the materials, and the problems of low stirring efficiency, nonuniform mixing, low product conversion rate, and unsatisfactory repeatability among batches and product stability of the existing stirring equipment for preparing the sulfone polymers can be solved.
Description
Technical Field
The utility model belongs to the technical field of chemical equipment manufacturing, and particularly relates to a stirring system for sulfone polymers.
Background
The sulfone polymer is an amorphous thermoplastic high-performance resin, and has excellent mechanical properties, wear resistance and other properties, so that the sulfone polymer can be widely applied to high-end fields of medical instruments, aerospace, electronics and the like. In the preparation process of sulfone polymers, 4-dichlorodiphenyl sulfone, bisphenol a, bisphenol S, hydroquinone, 4-biphenyldiol, sodium hydroxide, potassium carbonate or potassium bicarbonate and the like are mostly selected as main raw materials, N-dimethylacetamide, dimethyl sulfoxide, N-dimethylformamide, N-methylpyrrolidone and the like are selected as solvents, toluene, xylene, chlorobenzene and the like are used as dehydrating agents, monomers or methyl chloride are used for end capping, and after polymerization, post-treatment of the polymers is carried out.
At present, in the preparation process of the sulfone polymer, a common stirring device is a stirring tank type reactor, and common stirrers are divided into two types, wherein one type is suitable for low-viscosity fluid, such as three-blade sweepback paddles, inclined paddles and the like; the other is suitable for high-viscosity fluid, such as anchor type paddles, ribbon paddles and the like. However, in the process of preparing the sulfone polymer by using the stirring equipment, the problems of low stirring efficiency, uneven mixing of a reaction system, low product conversion rate, unsatisfactory batch-to-batch repeatability, unsatisfactory product stability and the like still exist.
Therefore, how to develop a novel stirring device which has high stirring efficiency and can realize the sufficient uniform mixing of the reaction system is the key for solving the problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the related technology, the utility model provides a stirring system for sulfone polymers, which has the characteristics of simple structure, simple and convenient operation, high stirring efficiency, capability of realizing full mixing of a reaction system and the like, and can solve the problems of low stirring efficiency, uneven mixing of the reaction system, low product conversion rate, non-ideal batch repeatability, unsatisfactory product stability and the like of the existing stirring equipment for preparing sulfone polymers.
The utility model provides a stirring system of sulfone polymers, which comprises:
the stirring device comprises a sleeve, a stirring shaft and a helical blade fixed on the stirring shaft, wherein the stirring shaft is arranged in the sleeve;
the stirring shaft drives the helical blade to carry out counter-axial flow stirring on the materials in the reaction kettle;
the ratio of the distance l from the outer edge of the sleeve to the inner wall of the reaction kettle to the radius d of the stirrer is more than or equal to 0.3 and less than or equal to 0.6.
In some preferred embodiments, the reactor further comprises a flow mixing device, wherein the flow mixing device leads out raw materials in the reaction kettle and refluxes the raw materials into the reaction kettle from the top of the reaction kettle.
In some preferred embodiments, the reaction kettle is provided with a liquid feeding hole and a liquid discharging hole, the liquid feeding hole is arranged at the top of the reaction kettle, and the liquid discharging hole is arranged at one side of the bottom of the reaction kettle;
the feed inlet of the mixed flow equipment is communicated with the liquid discharge port, and the discharge port of the mixed flow equipment is communicated with the liquid feed inlet.
In some preferred embodiments, the mixing device is one or more of an emulsification pump, a shear pump, a grinding pump, a twin screw extruder.
In some preferred embodiments, the bottom center of the reaction kettle is provided with a discharge hole.
In some preferred embodiments, the reaction kettle comprises a kettle body and a kettle cover covering the top of the kettle body, wherein one side of the top of the kettle cover is provided with the liquid feeding hole, and the other side of the top of the kettle cover is provided with the powder feeding hole.
In some preferred embodiments, the ratio h/a between the height h1 of the sleeve and the length a of the helical blade is 0.5-0.75, the helical blade extends into the bottom of the reaction kettle, and the ratio between the distance h2 from the bottom end of the sleeve to the bottom end of the helical blade and the length a of the helical blade is 0.1-0.2.
In some preferred embodiments, the sleeve is arranged at the center of the helical blade, and the ratio h/a between the height h1 of the sleeve and the length a of the helical blade is 0.625.
In some preferred embodiments, the helical blade extends widthwise toward and adjacent to the inner wall of the sleeve.
In some preferred embodiments, the ratio l/d between the distance l from the outer edge of the sleeve to the inner wall of the reaction vessel and the radius d of the stirrer is 3/7.
Compared with the prior art, the utility model has the advantages and positive effects that:
1. the helical blade of the stirring system can stir and mix materials in the reaction kettle, particularly materials in the sleeve uniformly, and the materials are guided towards the upper part of the reaction kettle by overcoming gravity sedimentation and flow towards the bottom of the reaction kettle by utilizing the gravity sedimentation, so that the materials in the reaction kettle are fully mixed up and down uniformly to perform a counter-axial stirring effect, the incomplete reaction phenomenon caused by local accumulation of the materials is avoided, the stirring system has the characteristics of simple structure, simplicity and convenience in operation, high stirring efficiency, capability of fully mixing the reaction system and the like, and the problems of low stirring efficiency, non-uniform mixing of the reaction system, low product conversion rate, non-ideal batch repeatability, non-ideal product stability and the like of the conventional stirring equipment for preparing sulfone polymers can be solved;
2. the mixing equipment arranged in the stirring system can lead the materials in the reaction kettle out from the bottom of the reaction kettle to be subjected to reinforced shearing and homogenization and return to the reaction kettle from the top of the reaction kettle against the action of gravity settling, so that the materials and the counter-axial flow of the stirrer are stirred to form double-counter-back mixing, the materials in the reaction kettle are further uniformly mixed in the whole upper, lower, left and right regions, the counter-axial flow stirring action in the system is increased (as shown in figure 3), the local accumulation of the materials is avoided, the materials are more uniformly mixed, the reaction is more sufficient, the problems of low conversion rate, unsatisfactory batch repeatability and stability and the like caused by the nonuniform mixing of a high-viscosity material reaction system are effectively solved, and the applicability of the stirring system to various reaction materials is greatly improved;
3. according to the stirring system for the sulfone polymer, the spiral blade is arranged at the bottom of the stirring shaft, the sleeve structure is sleeved outside the spiral blade, the ratio of the sleeve height h1 to the length a of the spiral blade, the ratio of the distance h2 from the bottom end of the sleeve to the bottom of the kettle body to the length a of the spiral blade and the like are further limited, the stirring efficiency of the stirring system can be improved, the uniform mixing of a reaction system is realized, and the stirring system can be well applied to the preparation of the sulfone polymer;
4. the stirring system of sulfone polymer has simple integral structure design and is convenient to operate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic overall structure diagram of an embodiment of a stirring system for sulfone polymers provided by the utility model;
FIG. 2 is a schematic view of the working principle of the counter-axial flow stirring treatment of the stirring system for sulfone polymers provided by the utility model;
fig. 3 is a schematic diagram of the working principle of the counter-axial flow stirring treatment when the stirring system of the sulfone polymer provided by the utility model performs extracorporeal circulation.
In the figure:
1. a kettle body; 2. a kettle cover; 3. a liquid feed port; 4. a liquid discharge port; 5. a powder feeding port; 6. a discharge port; 7. a stirring shaft; 8. a helical blade; 9. a sleeve; 10. a motor; 11. and a speed reducer.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in attached figures 1-3, the utility model provides a stirring system of sulfone polymer,
the device comprises a reaction kettle and a stirrer, wherein the stirrer comprises a sleeve 9, a stirring shaft 7 and a helical blade 8 fixed on the stirring shaft 7, and the stirring shaft 7 is arranged in the sleeve 9;
the stirring shaft 7 drives the helical blade 8 to carry out counter-axial flow stirring on the materials in the reaction kettle.
In the above embodiment, the helical blade of the stirring system of the present invention can stir and mix the materials in the reaction kettle, especially the materials in the sleeve, uniformly, and make the materials flow toward the upper portion of the reaction kettle by overcoming the gravity settling, and flow toward the bottom of the reaction kettle by utilizing the gravity settling, so that the materials in the reaction kettle are mixed uniformly and uniformly up and down to perform the counter-axial flow stirring function (as shown in fig. 2), thereby avoiding the incomplete reaction caused by the local stacking of the materials.
As shown in FIG. 1, the ratio of the distance l from the outer edge of the sleeve 9 to the inner wall of the reaction kettle to the radius d of the stirrer in the utility model is 0.3. ltoreq. l/d. ltoreq.1, preferably 0.3-0.6; that is, when the radius of the reaction kettle is 1m, the radius of the stirrer (i.e., the dimension from the axis of the stirring shaft to the sleeve) is 0.65-0.75 m. The distance from the outer edge of the sleeve to the inner wall of the reaction kettle is 0.35-0.25 m; the device simple structure, processing preparation is convenient, makes things convenient for observation, the sample among the reaction process moreover to form the accurate control to the reaction degree.
In a specific embodiment, the ratio l/d between the distance l from the outer edge of the sleeve 9 to the inner wall of the reaction vessel and the radius d of the stirrer is 3/7, i.e. the radius of the stirrer is 0.7m, and the distance from the outer edge of the sleeve 9 to the inner wall of the reaction vessel is 0.3 m. It should be noted that, regarding the size of each component, the person skilled in the art can enlarge or reduce the same scale in practical application, and the above numerical values are not to be taken as a limitation.
As shown in FIG. 1, the ratio h/a between the height h1 of the sleeve 9 and the length a of the helical blade 8 is 0.5-0.75, the helical blade 8 extends into the bottom of the reaction vessel, and the ratio between the distance h2 from the bottom end of the sleeve 9 to the bottom end of the helical blade 8 and the length a of the helical blade 8 is 0.1-0.2. That is, in the axial direction, the upper end and the lower end of the helical blade 8 are partially protruded out of the sleeve 9, so that most of materials at the bottom of the reaction kettle can be easily sucked into the sleeve 9 by the helical blade 8, and all the materials overflow from the top of the sleeve 9 to be discharged, thereby more fully mixing the materials in the reaction kettle and inside and outside the sleeve 9 to perform the inverse axial flow stirring effect.
In a specific embodiment, the sleeve 9 is disposed at the center of the helical blade 8, and the ratio h/a between the height h1 of the sleeve 9 and the length a of the helical blade 8 is 0.625. That is, when the length a of the helical blade 8 is 1m, the height h1 of the sleeve 9 is 0.625m, the distance h2 from the bottom end of the sleeve 9 to the bottom end of the helical blade 8 is 0.1875m, and the distance from the top end of the sleeve 8 to the top end of the helical blade 9 is also 0.1875 m.
In some preferred embodiments, the reactor further comprises a flow mixing device, wherein the flow mixing device leads out part of the mixture at the bottom of the reaction kettle and between the outer edge of the sleeve 9 and the inner wall of the reaction kettle and reflows to the reaction kettle from the top of the reaction kettle.
In the preferred embodiment, for high-viscosity materials, the mixing device provided in the stirring system of the present invention can extract part of the materials, especially the materials at the bottom of the reaction kettle, from the bottom of the reaction kettle and return the materials from the top of the reaction kettle to the reaction kettle against the gravity settling effect, so as to form double inverse back-mixing with the inverse axial flow stirring of the stirrer, further to mix the materials in the reaction kettle uniformly in all areas, including the upper area, the lower area, the left area and the right area, and to increase the inverse axial flow stirring effect in the system (as shown in fig. 3), thereby avoiding local accumulation of the materials, mixing the materials more uniformly, reacting more fully, effectively solving the problems of low conversion rate, unsatisfactory repeatability and stability among batches caused by non-uniform mixing of the high-viscosity material reaction system, and greatly improving the applicability of the stirring system to various reaction materials.
In some preferred embodiments, the reaction kettle is provided with a liquid inlet 3 and a liquid outlet 4, the liquid inlet 3 is arranged at the top of the reaction kettle, and the liquid outlet 4 is arranged at one side of the bottom of the reaction kettle;
the feed inlet of the mixed flow equipment is communicated with a liquid discharge port 4, and the discharge port of the mixed flow equipment is communicated with a liquid feed inlet 3.
In some preferred embodiments, the mixing device is one or more of an emulsification pump, a shear pump, a grinding pump, a twin screw extruder.
In some preferred embodiments, a discharge port 6 is arranged at the bottom center of the reaction kettle.
In some preferred embodiments, the reaction kettle comprises a kettle body 1 and a kettle cover 2 covering the top of the kettle body 1, wherein one side of the top of the kettle cover 2 is provided with a liquid feed port 3, and the other side of the top of the kettle cover 2 is provided with a powder feed port 5.
In some of preferred embodiments, helical blade 8 width direction extends towards the inner wall of sleeve 9 and is close to the inner wall of sleeve 9, and helical blade 8 is close to sleeve 9 inner wall setting to conveniently carry out the water conservancy diversion to the whole materials that get into in sleeve 9, and make sleeve 9 inner wall form guiding pressure to the material of water conservancy diversion, improve the water conservancy diversion speed of material, reinforcing sleeve 9 inside and outside backmixing effect.
In the above example, specifically, as shown in fig. 1, the stirring system of the sulfone-based polymer includes:
the reaction kettle comprises a kettle body 1 and a kettle cover 2 covering the top of the kettle body 1, wherein one side of the top of the kettle cover 2 is provided with a liquid feeding hole 3, one side of the bottom of the kettle body 1 is provided with a liquid discharging hole 4,
the driving device is arranged at the top of the kettle cover 2,
a sleeve type stirrer vertically arranged inside the kettle body 1, and
the inlet of the mixed flow equipment is communicated with a liquid discharge port 4, and the outlet of the mixed flow equipment is communicated with a liquid feed port 3;
wherein, the sleeve type stirrer comprises a stirring shaft 7 vertically arranged in the kettle body 1, a helical blade 8 fixed at the bottom of the stirring shaft 7 and a sleeve 9 sleeved outside the helical blade 8.
In the above exemplary embodiment, the stirring system of the sulfone polymer can improve the stirring efficiency by installing the helical blade 8 at the bottom of the stirring shaft 7 and sleeving the sleeve 9 outside the helical blade 8, thereby realizing the sufficient mixing of the reaction system.
Further, in the stirring system for sulfone polymers in the technical scheme, a double-screw extruder is arranged to lead out part of the reaction raw materials at the bottom of the kettle body 1 and between the outer edge of the stirrer and the inner wall of the kettle body 1 in vitro and reflux the reaction raw materials into the reaction kettle for stirring treatment, so that the stirring efficiency can be further improved, and the reaction system can be fully mixed. In addition, the embodiment of the present invention does not show the specific structure of the flow mixing device, because: the device specifically selects one or more of an emulsification pump, a shearing pump, a grinding pump and a double-screw extruder which are commercially available at present, and in the practical application process, the device can be selected from one or more of the emulsification pump, the shearing pump, the grinding pump and the double-screw extruder which are commercially available at present according to the actual needs.
In some embodiments, the ratio h1/a of the height h1 of the sleeve 9 to the length a of the helical blade 8 is 0.5-0.75.
In the above embodiments, the ratio h1/a of the height h1 of the sleeve 9 to the length a of the helical blade 8 may be selected from 0.5, 0.55, 0.6, 0.65, 0.70, 0.75 or any value within the above-mentioned range according to actual requirements.
In some embodiments, the helical blade 8 extends into the bottom of the kettle body 1, and the ratio h2/a of the distance h2 from the bottom end of the sleeve 9 to the bottom of the kettle body 1 to the length a of the helical blade 8 is 0.1-0.2.
In some embodiments, the ratio l/d of the distance l from the outer edge of the sleeve 9 to the inner wall of the kettle body 1 to the inner diameter d of the kettle body 1 is 0.3-0.6.
In the above embodiment, the ratio l/d of the distance l from the outer edge of the sleeve 9 to the inner wall of the kettle body 1 to the inner diameter d of the kettle body 1 may be selected from 0.3, 0.4, 0.5, 0.6 or any value within the above-mentioned limited range according to actual requirements.
In some embodiments, the other side of the top of the kettle cover 2 is provided with a powder feeding port 5 for feeding reaction raw materials.
In some embodiments, a discharge port 6 is formed at the center of the bottom of the autoclave body 1, and is a discharge port for the product to be prepared.
In some embodiments, the driving device includes a motor 10 and a speed reducer 11 in driving connection with the motor 10.
In some embodiments, the output end of the speed reducer 11 is connected with the upper part of the stirring shaft 7.
The following description is given, with reference to fig. 1, on a specific structure and a working process of an embodiment of a stirring system for a sulfone polymer of the present invention, where the working process takes a stirring system for a sulfone polymer to prepare a sulfone polymer as an example, specifically:
(1) reaction raw materials (such as dried monomer dichlorodiphenyl sulfone, bisphenol A, N-dimethylacetamide solvent and the like) are added into the reaction kettle through the powder feeding hole 5, the driving device is started, and the stirring shaft 7, the helical blade 8 at the bottom of the stirring shaft 7 and the sleeve 9 sleeved outside the helical blade 8 are driven to stir the reaction raw materials inside the kettle body 1;
(2) adding a dry granular salt (such as anhydrous potassium carbonate and the like) with an equimolar amount with a dry monomer into a reaction kettle, leading out a part of reaction raw materials at the bottom of the kettle body 1 and between the outer edge of a stirrer and the inner wall of the kettle body 1 by a double-screw extruder in vitro, refluxing the reaction raw materials into the reaction kettle, and carrying out stirring treatment and polymerization reaction, wherein the inlet of the double-screw extruder is communicated with a liquid discharge port 4, and the outlet of the double-screw extruder is communicated with a liquid feed port 3;
(3) and (3) after dehydration and polymerization reaction for a period of time, obtaining an intermediate polymerization solution, discharging the intermediate polymerization solution from a discharge port 6 at the bottom of the kettle body 1, and performing post-treatment such as granulation, precipitation, drying and the like to obtain a sulfone polymer product.
Through the description of the embodiments of the stirring system for the sulfone polymer, it can be seen that the embodiments of the stirring system for the sulfone polymer of the utility model have at least one or more of the following advantages:
the stirring efficiency is high. According to the stirring system for the sulfone polymer, the spiral blade is arranged at the bottom of the stirring shaft, the sleeve structure is sleeved outside the spiral blade, the ratio of the height h1 of the sleeve to the length a of the spiral blade, the ratio of the distance h2 from the bottom end of the sleeve to the bottom of the kettle body to the length a of the spiral blade and the like are further limited, meanwhile, the mixed flow equipment is arranged to lead out reaction raw materials in the kettle body from the outside and return the reaction raw materials to the reaction kettle for stirring, so that the stirring efficiency can be further improved, the reaction system can be fully mixed, the stirring efficiency of the stirring system can be improved, the reaction system can be uniformly mixed, and the stirring system can be well applied to the preparation of the sulfone polymer.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (10)
1. A stirring system of sulfone polymers comprises a reaction kettle and a stirrer, and is characterized in that the stirrer comprises a sleeve, a stirring shaft and a helical blade fixed on the stirring shaft, and the stirring shaft is arranged in the sleeve;
the stirring shaft drives the helical blade to carry out counter-axial flow stirring on the materials in the reaction kettle;
the ratio of the distance l from the outer edge of the sleeve to the inner wall of the reaction kettle to the radius d of the stirrer is more than or equal to 0.3 and less than or equal to 0.6.
2. The stirring system for sulfone polymers as claimed in claim 1, further comprising a flow mixing device, wherein the flow mixing device draws out a part of the mixture at the bottom of the reaction kettle and between the outer edge of the sleeve and the inner wall of the reaction kettle and reflows into the reaction kettle from the top of the reaction kettle.
3. The stirring system of sulfone polymer as recited in claim 2, wherein the reaction kettle is provided with a liquid inlet and a liquid outlet, the liquid inlet is arranged at the top of the reaction kettle, and the liquid outlet is arranged at one side of the bottom of the reaction kettle;
the feed inlet of the mixed flow equipment is communicated with the liquid discharge port, and the discharge port of the mixed flow equipment is communicated with the liquid feed inlet.
4. The stirring system of sulfone-based polymer of claim 3, wherein the mixing device is one or more of an emulsification pump, a shear pump, a grinding pump, a twin-screw extruder.
5. The stirring system of sulfone polymer as claimed in claim 3, wherein a discharge port is arranged at the central position of the bottom of the reaction kettle.
6. The stirring system of sulfone polymer as recited in claim 5, wherein the reaction kettle comprises a kettle body and a kettle cover covering the top of the kettle body, wherein one side of the top of the kettle cover is provided with the liquid feeding port, and the other side of the top of the kettle cover is provided with the powder feeding port.
7. The stirring system of sulfone polymers as claimed in claim 1, wherein the ratio h/a between the height h1 of the sleeve and the length a of the helical blade is 0.5-0.75, the helical blade extends into the bottom of the reaction kettle, and the ratio between the distance h2 from the bottom end of the sleeve to the bottom end of the helical blade and the length a of the helical blade is 0.1-0.2.
8. The stirring system of sulfone polymer as claimed in claim 7, wherein the sleeve is disposed at the center of the helical blade, and the ratio h/a between the height h1 of the sleeve and the length a of the helical blade is 0.625.
9. The stirring system of sulfone-based polymer as recited in claim 7, wherein the helical blade extends in the width direction toward and near the inner wall of the sleeve.
10. The stirring system of sulfone polymer as claimed in claim 1, wherein the ratio l/d between the distance l from the outer edge of the sleeve to the inner wall of the reaction vessel and the radius d of the stirrer is 3/7.
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| CN202122294600.1U CN215842990U (en) | 2021-09-22 | 2021-09-22 | Stirring system of sulfone polymer |
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