Polyarylsulfone and preparation process thereof

Abstract

The invention relates to the technical field of high polymer materials, and discloses polyarylsulfone and a preparation process thereof. The preparation process of the polyarylsulfone comprises the following steps: adding di-(4-chlorodiphenyl sulfone), water and an alkaline compound into a solvent to form a mixed solution; under a protective atmosphere, controlling the temperature of the mixed solution to be 130-150 DEG C, and reacting for 4-6 hours to obtain an intermediate product; adding di-(4-chlorodiphenyl sulfone) and a solvent into the intermediate product, controlling the temperature to be 160-220 DEG C, and reacting for 4-8 hours to prepare a polyarylsulfone solution; the polyarylsulfone solution is filtered, smashed, washed and dried, and polyarylsulfone is prepared. According to the technical scheme, a heavy metal catalyst does not need to be used, the cost is effectively reduced, and the problems of environmental pollution and equipment corrosion are avoided. And the whole reaction process has high chemical selectivity and few side reactions, and the prepared polyarylsulfone product has high yield and purity.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to polyaryl sulfone and a preparation process thereof. Background Art

[0002] Polyarylsulfone is a polymer material with excellent thermal stability, mechanical properties and chemical stability, and is widely used in aerospace, electrical and electronic, and automobile manufacturing. At present, the preparation method of polyarylsulfone usually requires the use of heavy metal catalysts, which not only increases production costs, but also brings environmental pollution problems. Summary of the invention

[0003] The main purpose of the present invention is to provide a polyaryl sulfone and a preparation process thereof, aiming to solve the problem that the preparation method of polyaryl sulfone in the prior art needs to use a heavy metal catalyst, resulting in high production cost and environmental pollution.

[0004] To achieve the above object, the present application proposes a polyaryl sulfone preparation process, comprising the following steps:

[0005] S10, providing bi-(4-chlorodiphenyl sulfone), water and an alkaline compound, and adding the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound into a solvent to form a mixed solution;

[0006] S20, under a protective atmosphere, controlling the temperature of the mixed solution in step S10 to 130-150° C., reacting for 4-6 hours to obtain an intermediate product, wherein the water generated during the reaction is removed from the reaction system;

[0007] S30, taking bi-(4-chlorodiphenyl sulfone) and a solvent, and adding the bi-(4-chlorodiphenyl sulfone) and the solvent to the intermediate product obtained in step S20, controlling the temperature to be 160-220° C., reacting for 4-8 hours, and obtaining the polyaryl sulfone solution;

[0008] S40, filtering, crushing, washing, and drying the polyaryl sulfone solution obtained in step S30 to obtain the polyaryl sulfone.

[0009] Optionally, in step S10, the alkaline compound is a monobasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1):(1.8-2.2):(4-4.5);

[0010] The mass of the bi-(4-chlorodiphenyl sulfone) added in step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) used in step S10.

[0011] Optionally, the monobasic alkali includes at least one of sodium hydroxide, potassium hydroxide, and potassium bicarbonate.

[0012] Optionally, in step S10, the alkaline compound is a dibasic base, and the molar ratio of the di-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1): (1.8-2.2): (2-2.25);

[0013] The mass of the bi-(4-chlorodiphenyl sulfone) added in step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) used in step S10.

[0014] Optionally, the dibasic base comprises at least one of sodium carbonate and potassium carbonate.

[0015] Optionally, in step S20, the reaction temperature is 140-145°C.

[0016] Optionally, in step S30, the reaction temperature is 190-210°C.

[0017] Optionally, in step S20, a solvent-water method is used to remove water generated during the reaction from the reaction system; and / or,

[0018] In the step S20, the protective atmosphere is nitrogen or argon.

[0019] Optionally, in step S10, the solvent includes at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone.

[0020] The present invention also provides a polyaryl sulfone, wherein the polyaryl sulfone preparation process comprises the following steps:

[0021] S10, providing bi-(4-chlorodiphenyl sulfone), water and an alkaline compound, and adding the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound into a solvent to form a mixed solution;

[0022] S20, under a protective atmosphere, controlling the temperature of the mixed solution in step S10 to 130-150° C., reacting for 4-6 hours to obtain an intermediate product, wherein the water generated during the reaction is removed from the reaction system;

[0023] S30, taking bi-(4-chlorodiphenyl sulfone) and a solvent, and adding the bi-(4-chlorodiphenyl sulfone) and the solvent to the intermediate product obtained in step S20, controlling the temperature to be 160-200° C., reacting for 4-8 hours, and obtaining the polyaryl sulfone solution;

[0024] S40, filtering, crushing, washing, and drying the polyaryl sulfone solution obtained in step S30 to obtain the polyaryl sulfone.

[0025] In the technical solution of the present invention, in step S10, bi-(4-chlorodiphenyl sulfone), water, alkaline compound, and solvent are mixed to form a mixed solution. In step S20, under a protective atmosphere, the temperature of the mixed solution is controlled to be 130-150° C., and under stirring, bi-(4-chlorodiphenyl sulfone) undergoes a hydrolysis reaction to generate bi-(4-hydroxydiphenyl sulfone) and salt by-products. In this reaction process, the alkaline compound provides the alkaline conditions required for the hydrolysis reaction, and the alkaline compound also reacts with the hydrogen chloride generated by the hydrolysis reaction to generate salt by-products, thereby avoiding the accumulation of hydrogen chloride.

[0026] The generated bi-(4-hydroxydiphenyl sulfone) further reacts with an alkaline compound to generate a salt product of bi-(4-hydroxydiphenyl sulfone). The reaction product also includes water. The water generated during the reaction is removed from the reaction system to optimize the chemical reaction process, prevent the occurrence of side reactions, and improve the yield and purity of the final product.

[0027] In step S30, bi-(4-chlorodiphenyl sulfone) and a solvent are added to the intermediate product obtained in step S20 to form a mixed system. Under a protective atmosphere, the temperature of the mixed system is controlled to be 160-220° C. Under stirring, the salt product of bi-(4-hydroxydiphenyl sulfone) and bi-(4-chlorodiphenyl sulfone) undergo a polycondensation reaction to generate a polyaryl sulfone product. During the reaction, the salt product of bi-(4-hydroxydiphenyl sulfone) provides active hydroxyl groups, which cause dehydration condensation between molecules to generate a stable polyaryl sulfone chain.

[0028] In step S40, the polyarylsulfone solution obtained in step S30 is taken out and filtered to remove byproducts such as solid salt in the polyarylsulfone solution, and a crude polyarylsulfone product is obtained after filtering. Water is added to the crude polyarylsulfone product, and stirred, and the product is crushed by a colloid mill and centrifuged to obtain a solid product, which is transported to a washing kettle and washed 2 to 4 times with boiling water in reverse flow, and then dried at a temperature of 140 to 160° C. to obtain a polyarylsulfone with high purity.

[0029] In the technical solution of the present invention, no heavy metal catalyst is needed, which effectively reduces the cost and avoids the problems of environmental pollution and equipment corrosion. In addition, the whole reaction process has high chemical selectivity, less side reactions, and the yield and purity of the prepared polyaryl sulfone product are both high. In addition, the reaction conditions in the technical solution of the present invention are relatively mild, the process is easy to control, and is suitable for large-scale industrial production. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Polyarylsulfone is a polymer material with excellent thermal stability, mechanical properties and chemical stability, and is widely used in aerospace, electrical and electronic, and automobile manufacturing. At present, the preparation method of polyarylsulfone usually requires the use of heavy metal catalysts, which not only increases production costs, but also brings environmental pollution problems.

[0033] In view of this, the present invention proposes a polyaryl sulfone preparation process to solve the problem that the polyaryl sulfone preparation method in the prior art needs to use a heavy metal catalyst, resulting in high production costs and environmental pollution.

[0034] In the present invention, the polyaryl sulfone preparation process comprises the following steps:

[0035] S10, providing bi-(4-chlorodiphenyl sulfone), water and an alkaline compound, and adding the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound into a solvent to form a mixed solution;

[0036] S20, under a protective atmosphere, controlling the temperature of the mixed solution in step S10 to 130-150° C., reacting for 4-6 hours to obtain an intermediate product, wherein the water generated during the reaction is removed from the reaction system;

[0037] S30, taking bi-(4-chlorodiphenyl sulfone) and a solvent, and adding the bi-(4-chlorodiphenyl sulfone) and the solvent to the intermediate product obtained in step S20, controlling the temperature to be 160-220° C., reacting for 4-8 hours, and obtaining the polyaryl sulfone solution;

[0038] S40, filtering, crushing, washing, and drying the polyaryl sulfone solution obtained in step S30 to obtain the polyaryl sulfone.

[0039] In the technical solution of the present invention, in step S10, a solvent is put into a reaction kettle, and bi-(4-chlorodiphenyl sulfone), water and an alkaline compound are added into the reaction kettle, so that bi-(4-chlorodiphenyl sulfone), water, an alkaline compound and the solvent are mixed to form a mixed liquid.

[0040] In step S20, under a protective atmosphere, the temperature of the mixed liquid in the reactor is controlled to be 130-150° C., and a stirring device is started. Under stirring conditions, bi-(4-chlorodiphenyl sulfone) undergoes a hydrolysis reaction to generate bi-(4-hydroxydiphenyl sulfone) and salt byproducts. The chemical formula of bi-(4-chlorodiphenyl sulfone) is as follows:

[0041]

[0042] The chemical formula of bi-(4-hydroxydiphenyl sulfone) is as follows:

[0043]

[0044] During this reaction process, the alkaline compound provides the alkaline conditions required for the hydrolysis reaction, and the alkaline compound also reacts with the hydrogen chloride produced by the hydrolysis reaction to generate salt by-products, thereby avoiding the accumulation of hydrogen chloride.

[0045] The generated bi-(4-hydroxydiphenyl sulfone) further reacts with an alkaline compound to generate a salt product of bi-(4-hydroxydiphenyl sulfone). It is understood that the salt product of bi-(4-hydroxydiphenyl sulfone) and other substances mixed with the salt product of bi-(4-hydroxydiphenyl sulfone) constitute an intermediate product. Taking sodium hydroxide as an example of the alkaline compound, the chemical formula of the salt product of bi-(4-hydroxydiphenyl sulfone) is as follows:

[0046]

[0047] During this reaction process, the reaction product also contains water. The water generated during the reaction process is removed from the reaction system to optimize the chemical reaction process, prevent the occurrence of side reactions, and improve the yield and purity of the final product.

[0048] During the reaction, if the reaction temperature is too low, the reaction rate will be affected. If the reaction temperature is too high, side reactions will occur, affecting the yield and purity of the final product and causing energy consumption.

[0049] In step S30, bi-(4-chlorodiphenyl sulfone) and solvent are added to a reactor, so that bi-(4-chlorodiphenyl sulfone), solvent, and the intermediate product obtained in step S20 are mixed to form a mixed system. Under a protective atmosphere, the temperature of the mixed system in the reactor is controlled to be 160-220° C. Under stirring, the salt product of bi-(4-hydroxydiphenyl sulfone) and bi-(4-chlorodiphenyl sulfone) undergo a polycondensation reaction to generate a polyaryl sulfone product. During the reaction, the salt product of bi-(4-hydroxydiphenyl sulfone) provides active hydroxyl groups, which causes dehydration condensation between molecules to generate a stable polyaryl sulfone chain. It is understandable that after the polycondensation reaction, a polyaryl sulfone solution is formed in the reactor.

[0050] During this reaction process, if the reaction temperature is too low, the reaction rate will be affected. If the reaction temperature is too high, higher requirements will be placed on the entire reaction equipment and energy consumption will also be caused.

[0051] In step S40, the polyarylsulfone solution obtained in step S30 is taken out and filtered to remove byproducts such as solid salt in the polyarylsulfone solution, and a crude polyarylsulfone product is obtained after filtering. Water is added to the crude polyarylsulfone product and stirred to form a slurry, the slurry is crushed by a colloid mill and then centrifuged to obtain a solid product, the solid product is transported to a washing kettle and washed with boiling water countercurrent for 2 to 4 times, and then dried at a temperature of 140 to 160° C. to obtain a polyarylsulfone with high purity.

[0052] In the technical solution of the present invention, no heavy metal catalyst is needed, which effectively reduces the cost and avoids the problems of environmental pollution and equipment corrosion. In addition, the whole reaction process has high chemical selectivity, less side reactions, and the yield and purity of the prepared polyaryl sulfone product are both high. In addition, the reaction conditions in the technical solution of the present invention are relatively mild, the process is easy to control, and is suitable for large-scale industrial production.

[0053] Further, in one embodiment of the present invention, in step S10, the alkaline compound is a monobasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1):(1.8-2.2):(4-4.5); the mass of the bi-(4-chlorodiphenyl sulfone) added in step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) in step S10. In the technical solution of the present invention, the yield and purity of the obtained product are guaranteed by controlling the amount of each raw material.

[0054] Specifically, the monobasic alkali includes at least one of sodium hydroxide, potassium hydroxide, and potassium bicarbonate.

[0055] Specifically, in the step S10, the alkaline compound is a monobasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is 1:2:4.2, and the mass of the solvent is twice the mass of the bi-(4-chlorodiphenyl sulfone); in the step S30, the mass of the bi-(4-chlorodiphenyl sulfone) added is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) in the step S10, and the mass of the solvent added is twice the mass of the bi-(4-chlorodiphenyl sulfone) in the step S10.

[0056] In another embodiment of the present invention, in the step S10, the alkaline compound is a dibasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1):(1.8-2.2):(2-2.25); the mass of the bi-(4-chlorodiphenyl sulfone) added in the step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) in the step S10.

[0057] Specifically, the dibasic base includes at least one of sodium carbonate and potassium carbonate.

[0058] Specifically, in the step S10, the alkaline compound is a dibasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is 1:2:2.1, and the mass of the solvent is twice the mass of the bi-(4-chlorodiphenyl sulfone); in the step S30, the mass of the bi-(4-chlorodiphenyl sulfone) added is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) in the step S10, and the mass of the solvent added is twice the mass of the bi-(4-chlorodiphenyl sulfone) in the step S10.

[0059] Furthermore, in step S20, the reaction temperature is 140-145°C.

[0060] In the technical solution of the present invention, the yield and purity of the prepared polyaryl sulfone product can be improved by further optimizing the reaction temperature of the mixed solution formed by di-(4-chlorodiphenyl sulfone), water and alkaline compounds.

[0061] Specifically, in step S20, the reaction temperature is 145°C.

[0062] Furthermore, in step S30, the reaction temperature is 190-210°C.

[0063] In the technical solution of the present invention, the yield and purity of the obtained polyaryl sulfone product can be improved by further optimizing the temperature during the polycondensation reaction of the salt product of bi-(4-hydroxydiphenyl sulfone) and bi-(4-chlorodiphenyl sulfone).

[0064] Specifically, in step S30, the reaction temperature is 200°C.

[0065] Furthermore, in the step S20, a solvent-water method is used to remove water generated during the reaction from the reaction system; and / or, in the step S20, the protective atmosphere is nitrogen or argon.

[0066] By adopting the above technical solution and the solvent-water method, the water generated by the reaction of bi-(4-hydroxydiphenyl sulfone) and the alkaline compound can be effectively removed from the reaction system and discharged outside the reactor to optimize the chemical reaction process, prevent the occurrence of side reactions, and improve the yield and purity of the final product. The solvent used in the solvent-water method is the same as the solvent in step S10, and the mass amount of the solvent is 15-25% of the mass of the solvent in step S10.

[0067] Furthermore, in step S10, the solvent includes at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone.

[0068] The present invention also provides a polyaryl sulfone, which is prepared by any of the above-mentioned polyaryl sulfone preparation processes. Since the polyaryl sulfone adopts the above-mentioned technical solution, it at least has all the beneficial effects brought by the above-mentioned technical solution, which will not be described one by one here.

[0069] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to explain the present invention, and are not used to limit the present invention.

[0070] Example 1

[0071] A preparation process of polyaryl sulfone comprises the following steps:

[0072] S10, providing bi-(4-chlorodiphenyl sulfone), water and sodium hydroxide, and adding bi-(4-chlorodiphenyl sulfone), water and sodium hydroxide to N,N-dimethylformamide to form a mixed solution, wherein the molar ratio of bi-(4-chlorodiphenyl sulfone), water and sodium hydroxide is 1:2:4.2; the mass amount of N,N-dimethylformamide is twice the mass of bi-(4-chlorodiphenyl sulfone);

[0073] S20, under nitrogen protection, controlling the temperature of the mixed solution in step S10 to 145°C, and reacting with stirring for 5 hours to obtain an intermediate product, wherein the water generated during the reaction is removed from the reaction system by a solvent-water method, the solvent used in the solvent-water method is N,N-dimethylformamide, and the mass of the solvent is 20% of the mass of the solvent in step S10;

[0074] S30, taking bi-(4-chlorodiphenyl sulfone) and N,N-dimethylformamide, and adding the bi-(4-chlorodiphenyl sulfone) and N,N-dimethylformamide to the intermediate product obtained in step S20, and controlling the temperature of the mixed solution to 200° C. under nitrogen protection, reacting for 6 hours to obtain a polyaryl sulfone solution, wherein the mass of the bi-(4-chlorodiphenyl sulfone) added is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) in step S10, and the mass of the N,N-dimethylformamide added is twice the mass of the N,N-dimethylformamide in step S10;

[0075] S40, filtering, crushing, washing, and drying the polyaryl sulfone solution obtained in step S30 to obtain polyaryl sulfone.

[0076] Wherein, in step S40, during filtration, the polyarylsulfone solution is sequentially passed through a filter membrane with a pore size of 50 μm, a filter membrane with a pore size of 15 μm, and a filter membrane with a pore size of 8 μm. Water is added to the filtered polyarylsulfone crude product, and the mass of the water added is 2.5 times the mass of the polyarylsulfone crude product, and stirred, and then centrifuged after colloid milling to obtain a solid product. The solid product is transported to a washing kettle and washed with boiling water countercurrent for 3 times, and then dried at a temperature of 140° C. to obtain polyarylsulfone.

[0077] Example 2

[0078] The difference between this embodiment and embodiment 1 is that in step S20, the temperature of the mixed liquid is controlled to be 130° C., and the rest is the same as embodiment 1.

[0079] Example 3

[0080] The difference between this embodiment and embodiment 1 is that in step S20, the temperature of the mixed liquid is controlled to be 140° C., and the rest is the same as embodiment 1.

[0081] Example 4

[0082] The difference between this embodiment and embodiment 1 is that in step S20, the temperature of the mixed liquid is controlled to be 150° C., and the rest is the same as embodiment 1.

[0083] Comparative Example 1

[0084] The difference between this comparative example and Example 1 is that in step S20, the temperature of the mixed liquid is controlled to be 120° C., and the rest is the same as Example 1.

[0085] Comparative Example 2

[0086] The difference between this comparative example and Example 1 is that in step S20, the temperature of the mixed liquid is controlled to be 160° C., and the rest is the same as Example 1.

[0087] Performance Testing

[0088] The yield and purity of the polyarylsulfone products obtained in Examples 1-4 and Comparative Examples 1-2 were tested, and the test results are shown in Table 1 below.

[0089] Table 1 Yield and purity of polysulfone

[0090] Yield (%) purity(%) Example 1 95 99.5 Example 2 89 99.0 Example 3 91 99.2 Example 4 96 99.6 Comparative Example 1 80 85.9 Comparative Example 2 71 72.4

[0091] As can be seen from Table 1, the yield of the polyaryl sulfones prepared in Examples 1 to 4 is ≥89%, and the purity is ≥99.0%. Among them, the yield of the polyaryl sulfone prepared in Example 4 is as high as 96%, and the yield is as high as 99.6%. The yield and yield of the polyaryl sulfone prepared in Example 1 are closer to those in Example 4. However, the reaction temperature of Example 1 is lower than that of Example 4. Considering the energy consumption, Example 1 is a better example.

[0092] The reaction temperature of Comparative Example 1 is lower than 130° C., which has an impact on the reaction rate, etc., resulting in a low yield and purity of the obtained polyaryl sulfone. The reaction temperature of Comparative Example 2 is 160° C., which is high and easily leads to the occurrence of side reactions, resulting in a low yield and purity of the obtained polyaryl sulfone.

[0093] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the patent protection scope of the present invention.

Claims

1. A process for preparing polyaryl sulfone, characterized in that: The following steps are involved: S10, providing bi-(4-chlorodiphenyl sulfone), water and an alkaline compound, and adding the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound into a solvent to form a mixed solution; S20, under a protective atmosphere, controlling the temperature of the mixed solution in step S10 to 130-150° C., reacting for 4-6 hours to obtain an intermediate product, wherein the water generated during the reaction is removed from the reaction system; S30, taking bi-(4-chlorodiphenyl sulfone) and a solvent, and adding the bi-(4-chlorodiphenyl sulfone) and the solvent to the intermediate product obtained in step S20, controlling the temperature to be 160-220° C., reacting for 4-8 hours, and obtaining the polyaryl sulfone solution; S40, filtering, crushing, washing, and drying the polyaryl sulfone solution obtained in step S30 to obtain the polyaryl sulfone.

2. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In the step S10, the alkaline compound is a monobasic base, and the molar ratio of the bi-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1): (1.8-2.2): (4-4.5); The mass of the bi-(4-chlorodiphenyl sulfone) added in step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) used in step S10.

3. The process for preparing polyaryl sulfone according to claim 2, characterized in that: The monobasic alkali includes at least one of sodium hydroxide, potassium hydroxide, and potassium bicarbonate.

4. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In the step S10, the alkaline compound is a dibasic base, and the molar ratio of the di-(4-chlorodiphenyl sulfone), the water and the alkaline compound is (0.9-1.1): (1.8-2.2): (2-2.25); The mass of the bi-(4-chlorodiphenyl sulfone) added in step S30 is the same as the mass amount of the bi-(4-chlorodiphenyl sulfone) used in step S10.

5. The process for preparing polyaryl sulfone according to claim 4, characterized in that: The dibasic base includes at least one of sodium carbonate and potassium carbonate.

6. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In the step S20, the reaction temperature is 140-145°C.

7. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In the step S30, the reaction temperature is 190-210°C.

8. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In step S20, a solvent-water method is used to remove water generated during the reaction from the reaction system; and / or, In the step S20, the protective atmosphere is nitrogen or argon.

9. The process for preparing polyaryl sulfone according to claim 1, characterized in that: In the step S10, the solvent includes at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone.

10. A polyarylsulfone, characterized in that The polyaryl sulfone is prepared by the polyaryl sulfone preparation process as described in any one of claims 1 to 9.

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