Preparation process of adsorbing material for treating textile printing and dyeing industrial wastewater

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a preparation process of an adsorption material for textile printing and dyeing industrial wastewater treatment.The preparation process comprises the steps that sulfonated triazinyl polyarylether sulfone and polyethylene glycol are added into N-methyl pyrrolidone to prepare a membrane casting solution, the membrane casting solution is poured on the surface of a glass plate, membrane scraping is conducted, a membrane is prepared through a phase inversion method, and the adsorption material is obtained. The adsorption material for treating the textile printing and dyeing industrial wastewater is obtained. A molecular chain of the polyarylethersulfone contains a large number of nitrogen-containing triazinamide structures which have a very strong coordination chelation effect on metal ions such as copper, meanwhile, a large number of sodium sulfonate groups are introduced into a side chain, and strong electrostatic interaction and other acting forces are formed on the metal ions such as copper, methylene blue and rhodamine B; the strong adsorption effect is shown. The method has good practical application in the field of textile printing and dyeing industrial wastewater treatment.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation process of an adsorption material for treating wastewater in the textile printing and dyeing industry. Background Art

[0002] Printing and dyeing wastewater contains a large amount of dye pollutants, heavy metal ions, printing and dyeing auxiliaries, etc., which are very polluting and difficult to degrade. The current methods for treating printing and dyeing wastewater include adsorption, chemical oxidation, membrane separation, etc.

[0003] Polyarylethersulfone has excellent heat resistance, chemical stability, acid and alkali resistance and other properties, and has broad practical applications in the field of wastewater treatment. Patent CN115364825B discloses a preparation method and application of a modified polyarylethersulfone porous fiber adsorption material, in which hydrophilic carboxyl groups and thiourea salicylaldehyde Schiff base chelating structures are grafted on the side chains of polyarylethersulfone, and the obtained modified polyarylethersulfone porous fibers have good adsorption properties for pollutants such as metal ions and phosphates in the water environment. However, this patent does not show good adsorption properties for dye pollutants. Compared with the above patent, the present invention prepares a polyarylethersulfone membrane material containing a large number of sodium sulfonate groups and nitrogen-containing triazineamide structures, which has good adsorption properties for pollutants such as dyes and metal ions. Summary of the invention

[0004] The invention solves the problem that the polyarylethersulfone membrane material has poor adsorption performance for pollutants such as dyes and metal ions.

[0005] The technical solution of the present invention is: a preparation process of an adsorbent material for treating wastewater from textile printing and dyeing industry, comprising the following steps:

[0006] (1) Add dry N-methylpyrrolidone, potassium carbonate, 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer, and diphenol monomer to a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 140-150° C., stir to react for 6-10 hours, cool, pour the solution into water, filter, wash with water, ethanol, and dry to obtain triazine phenyl polyarylethersulfone.

[0007] (2) Add dichloromethane and triazine phenyl polyarylethersulfone to a flask, stir, then add dichloromethane solution containing chlorosulfonic acid in an ice-water bath, stir and react for 1.5-2.5 hours, pour the solution into isopropanol, stir, add sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 8-9, stir, filter, wash with water, and dry to obtain sulfonated triazine polyarylethersulfone. The reaction formula is:

[0008]

[0009] (3) Add N-methylpyrrolidone, sulfonated triazine polyarylethersulfone, and polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, which is then poured onto the surface of a glass plate, scraped with a scraper, placed in distilled water, and formed into a membrane by a phase inversion method. The membrane is then immersed and washed in water for 48 hours, the water is changed every 6 hours, and the membrane is dried to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0010] Preferably, in (1), the molar ratio of potassium carbonate, 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer, and diphenol monomer is (150-220):(50-80):(20-50):100.

[0011] Preferably, the diphenol monomer is hydroquinone or 4,4'-biphenylene glycol.

[0012] Preferably, in (2), the mass ratio of triazine phenyl polyarylethersulfone to chlorosulfonic acid is 100:(24-38).

[0013] Preferably, the preparation method of triazine phenyl difluoro monomer is:

[0014] S1. Add ethylene glycol dimethyl ether solvent, 2-chloro-4,6-diamino-1,3,5-triazine, 3,5-difluorophenylboric acid, tetrakis(triphenylphosphine)palladium, and sodium carbonate aqueous solution to a flask equipped with a condenser reflux tube, wherein the molar ratio of 2-chloro-4,6-diamino-1,3,5-triazine, 3,5-difluorophenylboric acid, tetrakis(triphenylphosphine)palladium, and sodium carbonate is 100:(140-150):(2.6-3.2):(200-240); introduce nitrogen, heat to 80-85°C, stir and react for 36-48h, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethyl acetate to obtain 2-(3,5-difluorobenzene)-4,6-diamino-1,3,5-triazine. The reaction formula is:

[0015]

[0016] S2. Add dichloromethane, 2-(3,5-difluorophenyl)-4,6-diamino-1,3,5-triazine, triethylamine, and benzoyl chloride in a molar ratio of 100:(200-210):(200-210) to a flask, stir and react at room temperature for 12-18 hours, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethanol to obtain triazine phenyl difluoro monomer. The reaction formula is:

[0017]

[0018] The technical effect of the present invention is as follows: the present invention utilizes 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer and hydroquinone to carry out polycondensation reaction to obtain polyarylethersulfone containing a nitrogen-containing triazineamide structure and a large number of benzene rings in the side chain; after sulfonation with chlorosulfonic acid, a large number of sodium sulfonate groups are introduced into the benzene rings of the main chain and the side chain; finally, a membrane is prepared by a phase inversion method to obtain a polyarylethersulfone membrane adsorption material.

[0019] The molecular chain of the polyarylethersulfone of the present invention contains a large number of nitrogen-containing triazineamide structures, which have a strong coordination and chelating effect on metal ions such as copper, and at the same time introduces a large number of sodium sulfonate groups into the side chain, which form strong electrostatic interactions and other forces on metal ions such as copper, methylene blue, and rhodamine B, showing a strong adsorption effect, and significantly improving the adsorption performance and removal rate of the membrane adsorption material for dye pollutants and metal ions. It has good practical application in the field of textile printing and dyeing industrial wastewater treatment. DETAILED DESCRIPTION

[0020] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0021] Example 1

[0022] S1. Add 5 mL of ethylene glycol dimethyl ether solvent, 2 mmol 2-chloro-4,6-diamino-1,3,5-triazine, 3 mmol 3,5-difluorophenylboric acid, 0.064 mmol tetrakis(triphenylphosphine)palladium, and 2 mL of an aqueous solution containing 4.8 mmol sodium carbonate into a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 80°C, stir to react for 48 hours, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethyl acetate to obtain 2-(3,5-difluorobenzene)-4,6-diamino-1,3,5-triazine.

[0023] S2. Add 6 mL of dichloromethane, 2 mmol of 2-(3,5-difluorophenyl)-4,6-diamino-1,3,5-triazine, 4 mmol of triethylamine, and 4 mmol of benzoyl chloride into a flask, stir and react at room temperature for 18 hours, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethanol to obtain triazine phenyl difluoro monomer.

[0024] Example 2

[0025] S1. Add 6 mL of ethylene glycol dimethyl ether solvent, 2 mmol 2-chloro-4,6-diamino-1,3,5-triazine, 2.8 mmol 3,5-difluorophenylboric acid, 0.052 mmol tetrakis(triphenylphosphine)palladium, and 2 mL of 4 mmol sodium carbonate aqueous solution into a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 85°C, stir to react for 36 hours, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethyl acetate to obtain 2-(3,5-difluorobenzene)-4,6-diamino-1,3,5-triazine.

[0026] S2. Add 8 mL of dichloromethane, 2 mmol 2-(3,5-difluorophenyl)-4,6-diamino-1,3,5-triazine, 4.2 mmol triethylamine, and 4.2 mmol benzoyl chloride into a flask, stir and react at room temperature for 12 hours, distill under reduced pressure, wash with water and acetone in turn, and then recrystallize in ethanol to obtain triazine phenyl difluoro monomer.

[0027] Example 3

[0028] (1) In a flask equipped with a condenser reflux tube, 20 mL of dry N-methylpyrrolidone, 18 mmol of potassium carbonate, 8 mmol of 4,4-difluorodiphenyl sulfone, 2 mmol of triazine phenyl difluoro monomer (prepared in Example 1), and 10 mmol of hydroquinone were added, nitrogen was introduced, heated to 150° C., stirred for reaction for 6 h, cooled, and the solution was poured into water. After filtering, it was washed with water and ethanol in turn, and dried to obtain triazine phenyl polyarylethersulfone.

[0029] (2) Add 200 mL of dichloromethane and 5 g of triazine phenyl polyarylethersulfone into a flask, stir, then add 3 mL of dichloromethane solution containing 1.2 g of chlorosulfonic acid in an ice-water bath, stir and react for 1.5 h, pour the solution into 150 mL of isopropanol, stir, add 2% by mass sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 9, stir, filter, wash with water, and dry to obtain sulfonated triazine polyarylethersulfone.

[0030] (3) Add 65 mL of N-methylpyrrolidone, 10 g of sulfonated triazine polyarylethersulfone, and 1.2 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, then pour it onto the surface of a glass plate, use a film scraper to scrape the film, put it into distilled water, and form a membrane by a phase inversion method. Then, soak and wash the membrane in water for 48 hours, change the water every 6 hours, and dry it to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0031] Example 4

[0032] (1) Add 25 mL of dry N-methylpyrrolidone, 15 mmol of potassium carbonate, 7 mmol of 4,4-difluorodiphenyl sulfone, 3 mmol of triazine phenyl difluoro monomer (prepared in Example 1), and 10 mmol of hydroquinone to a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 140° C., stir to react for 10 hours, cool, pour the solution into water, filter, wash with water, ethanol, and dry to obtain triazine phenyl polyarylethersulfone.

[0033] (2) Add 250 mL of dichloromethane and 5 g of triazine phenyl polyarylethersulfone into a flask, stir, and then add 3 mL of dichloromethane solution containing 1.4 g of chlorosulfonic acid in an ice-water bath, stir and react for 2 h, pour the solution into 150 mL of isopropanol, stir, add 2% by mass sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 8, stir, filter, wash with water, and dry to obtain sulfonated triazine polyarylethersulfone.

[0034] (3) Add 60 mL of N-methylpyrrolidone, 10 g of sulfonated triazine polyarylethersulfone, and 1.1 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, which is then poured onto the surface of a glass plate and scraped with a scraper. The solution is placed in distilled water and a membrane is prepared by a phase inversion method. The membrane is then immersed and washed in water for 48 h, the water is changed every 6 h, and the solution is dried to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0035] Example 5

[0036] (1) In a flask equipped with a condenser reflux tube, 30 mL of dry N-methylpyrrolidone, 22 mmol potassium carbonate, 6 mmol 4,4-difluorodiphenyl sulfone, 4 mmol triazine phenyl difluoro monomer (prepared in Example 2), and 10 mmol 4,4'-biphenol were added, nitrogen was introduced, heated to 140°C, stirred for reaction for 10 hours, cooled, and the solution was poured into water. After filtering, the solution was washed with water and ethanol in turn, and dried to obtain triazine phenyl polyarylethersulfone.

[0037] (2) Add 300 mL of dichloromethane and 5 g of triazine phenyl polyarylethersulfone into a flask, stir, then add 3 mL of dichloromethane solution containing 1.7 g of chlorosulfonic acid in an ice-water bath, stir and react for 2.5 h, pour the solution into 150 mL of isopropanol, stir, add 2% by mass sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 9, stir, filter, wash with water, and dry to obtain sulfonated triazine polyarylethersulfone.

[0038] (3) Add 70 mL of N-methylpyrrolidone, 10 g of sulfonated triazine polyarylethersulfone, and 1.4 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, then pour it onto the surface of a glass plate, use a film scraper to scrape the film, put it into distilled water, and form a membrane by a phase inversion method. Then, soak and wash the membrane in water for 48 hours, change the water every 6 hours, and dry it to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0039] Example 6

[0040] (1) In a flask equipped with a condenser reflux tube, 30 mL of dry N-methylpyrrolidone, 18 mmol of potassium carbonate, 5 mmol of 4,4-difluorodiphenyl sulfone, 5 mmol of triazine phenyl difluoro monomer (prepared in Example 2), and 10 mmol of hydroquinone were added, nitrogen was introduced, heated to 145° C., stirred for reaction for 10 hours, cooled, and the solution was poured into water. After filtering, it was washed with water and ethanol in turn, and dried to obtain triazine phenyl polyarylethersulfone.

[0041] (2) Add 300 mL of dichloromethane and 5 g of triazine phenyl polyarylethersulfone into a flask, stir, and then add 3 mL of dichloromethane solution containing 1.9 g of chlorosulfonic acid in an ice-water bath, stir and react for 2.5 h, pour the solution into 150 mL of isopropanol, stir, add 2% by mass sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 8, stir, filter, wash with water, and dry to obtain sulfonated triazine polyarylethersulfone.

[0042] (3) Add 60 mL of N-methylpyrrolidone, 10 g of sulfonated triazine polyarylethersulfone, and 1.2 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, then pour it onto the surface of a glass plate, use a film scraper to scrape the film, put it into distilled water, and form a membrane by a phase inversion method. Then, soak and wash the membrane in water for 48 hours, change the water every 6 hours, and dry it to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0043] Comparative Example 1

[0044] (1) Add 20 mL of dry N-methylpyrrolidone, 18 mmol of potassium carbonate, 10 mmol of 4,4-difluorodiphenyl sulfone, and 10 mmol of hydroquinone to a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 150°C, stir to react for 6 hours, cool, pour the solution into water, filter, wash with water, ethanol, and dry to obtain polyarylethersulfone.

[0045] (2) Add 65 mL of N-methylpyrrolidone, 10 g of polyarylethersulfone, and 1.2 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, then pour it onto the surface of a glass plate, use a film scraper to scrape the film, put it into distilled water, and form a film by a phase inversion method. Then, soak and wash the film in water for 48 hours, change the water every 6 hours, and dry it to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0046] Comparative Example 2

[0047] (1) In a flask equipped with a condenser reflux tube, 20 mL of dry N-methylpyrrolidone, 18 mmol of potassium carbonate, 8 mmol of 4,4-difluorodiphenyl sulfone, 2 mmol of triazine phenyl difluoro monomer (prepared in Example 1), and 10 mmol of hydroquinone were added, nitrogen was introduced, heated to 150° C., stirred for reaction for 6 h, cooled, and the solution was poured into water. After filtering, it was washed with water and ethanol in turn, and dried to obtain triazine phenyl polyarylethersulfone.

[0048] (2) Add 65 mL of N-methylpyrrolidone, 10 g of triazine phenyl polyarylethersulfone, and 1.2 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, then pour it onto the surface of a glass plate, use a film scraper to scrape the film, put it into distilled water, and form a film by a phase inversion method. Then, soak and wash the film in water for 48 hours, change the water every 6 hours, and dry it to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0049] Comparative Example 3

[0050] (1) Add 20 mL of dry N-methylpyrrolidone, 18 mmol of potassium carbonate, 10 mmol of 4,4-difluorodiphenyl sulfone, and 10 mmol of hydroquinone to a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 150°C, stir to react for 6 hours, cool, pour the solution into water, filter, wash with water, ethanol, and dry to obtain polyarylethersulfone.

[0051] (2) Add 200 mL of dichloromethane and 5 g of polyarylethersulfone into a flask, stir, then add 3 mL of dichloromethane solution containing 1.2 g of chlorosulfonic acid in an ice-water bath, stir and react for 1.5 h, pour the solution into 150 mL of isopropanol, stir, add 2% by mass sodium hydroxide aqueous solution to adjust the pH of the reaction solution to 9, stir, filter, wash with water, and dry to obtain sulfonated polyarylethersulfone.

[0052] (3) Add 65 mL of N-methylpyrrolidone, 10 g of sulfonated polyarylethersulfone, and 1.2 g of polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, which is then poured onto the surface of a glass plate and scraped with a scraper. The solution is placed in distilled water and a membrane is prepared by a phase inversion method. The membrane is then immersed and washed in water for 48 h, the water is changed every 6 h, and the solution is dried to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

[0053] Pollutant adsorption simulation experiment: Add 500mL of water and methylene blue to a flask to make a solution with a mass concentration of 50mg / L, add 200-400mg of adsorbent material for textile printing and dyeing industrial wastewater treatment, oscillate and adsorb for 3h at 25℃, take the upper layer of liquid, measure the concentration by UV-visible spectrophotometer, and calculate the removal rate Q. Q = (C0-C) / C0×100%. C0 is the concentration before adsorption, and C is the concentration after adsorption. The methylene blue removal rate test results are shown in Table 1.

[0054] Table 1: Methylene blue removal efficiency

[0055]

[0056] Table 2

[0057] Add 500mL of water and rhodamine B to a flask to prepare a solution with a mass concentration of 50mg / L, add 200-500mg of adsorbent material for textile printing and dyeing industrial wastewater treatment, oscillate and adsorb for 4h at 25℃, take the upper layer of liquid, measure the concentration by UV-visible spectrophotometer, and calculate the removal rate Q. Q = (C0-C) / C0×100%. C0 is the concentration before adsorption, and C is the concentration after adsorption. The results of rhodamine B removal rate are shown in Table 2.

[0058] Table 2: Rhodamine B removal rate

[0059]

[0060]

[0061] After testing, the polyarylethersulfones of Comparative Examples 1 and 2 have not been sulfonated, do not contain sodium sulfonate groups, and cannot form electrostatic interactions and other forces with methylene blue and rhodamine B, resulting in poor adsorption performance of the membrane adsorption material and a low removal rate.

[0062] Example 3-6 utilizes 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer, and hydroquinone for polycondensation reaction. The side chains of the obtained polyarylethersulfone contain a large number of benzene rings. After sulfonation with chlorosulfonic acid, a large number of sodium sulfonate groups are introduced into the side chains, which form strong electrostatic interactions and other forces on methylene blue and rhodamine B. The membrane adsorption material exhibits strong adsorption performance and the removal rate is significantly improved.

[0063] In Comparative Example 3, 4,4-difluorodiphenyl sulfone and hydroquinone were subjected to a condensation reaction, and the side chain of the obtained polyarylethersulfone did not contain a large number of benzene rings. After sulfonation with chlorosulfonic acid, the content of sodium sulfonate groups in the polyarylethersulfone was relatively low, and the strong electrostatic interaction with methylene blue and rhodamine B was relatively low, resulting in the adsorption performance and removal rate of the membrane adsorption material being significantly lower than those in the embodiments.

[0064] Add 500 mL of water and copper nitrate to the flask to make Cu 2+ Add 100-200 mg of adsorbent material for textile printing and dyeing industrial wastewater treatment to a solution with a mass concentration of 20 mg / L, shake and adsorb for 3 hours at 25°C, take the upper layer of liquid, measure the concentration by atomic absorption spectrophotometer, and calculate the removal rate Q. Q = (C0-C) / C0×100%. C0 is the concentration before adsorption, and C is the concentration after adsorption. Cu 2+ The removal rate results are shown in Table 3.

[0065] Table 3: Cu 2+ Removal rate

[0066]

[0067] Example 3-6: 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer, and hydroquinone are used for polycondensation reaction to obtain a polyarylethersulfone having a large amount of nitrogen-containing triazineamide structure in its molecular chain. It has a strong coordination and chelating effect on metal ions such as copper, and after sulfonation with chlorosulfonic acid, a large number of sodium sulfonate groups are introduced into the side chain, which also has a strong adsorption effect on metal ions such as copper, significantly improving the adsorption performance and removal rate of membrane adsorption materials for metal ions.

[0068] The polyarylethersulfone membrane adsorption material of Comparative Example 1 does not contain nitrogen-containing triazineamide structure and sodium sulfonate group, and has very low adsorption performance and removal rate for metal ions.

[0069] The triazine phenyl polyarylether sulfone of Comparative Example 2 has not been sulfonated, does not contain a sodium sulfonate group, and only contains a nitrogen-containing triazine amide structure, and has low adsorption performance and removal rate for metal ions.

[0070] In Comparative Example 3, 4,4-difluorodiphenyl sulfone and hydroquinone are subjected to polycondensation reaction, and the molecular chain of the obtained polyarylethersulfone does not contain a nitrogen-containing triazineamide structure, and after sulfonation, the content of sodium sulfonate groups is low, and the adsorption performance and removal rate of metal ions are low.

[0071] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A process for preparing an adsorbent material for treating wastewater from a textile printing and dyeing industry, characterized in that: The preparation process comprises the following steps: (1) Add dry N-methylpyrrolidone, potassium carbonate, 4,4-difluorodiphenyl sulfone, and diphenol monomer to a flask equipped with a condenser reflux tube. triazine phenyl difluoro monomer, introducing nitrogen, stirring for reaction and then cooling, pouring the solution into water, filtering, washing and drying to obtain triazine phenyl polyarylether sulfone; (2) Add dichloromethane and triazine phenyl polyarylethersulfone into a flask, stir, then add a dichloromethane solution containing chlorosulfonic acid in an ice water bath, stir to react, pour the solution into isopropanol, stir, add a sodium hydroxide aqueous solution, stir, filter, wash, and dry to obtain a sulfonated triazine polyarylethersulfone; (3) Add N-methylpyrrolidone, sulfonated triazine polyarylethersulfone, and polyethylene glycol into a flask, stir and perform vacuum degassing to prepare a casting solution, which is then poured onto the surface of a glass plate, scraped with a scraper, placed in distilled water, and formed into a membrane by a phase inversion method. The membrane is then immersed in water for washing and dried to obtain an adsorbent material for treating wastewater from the textile printing and dyeing industry.

2. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: The molar ratio of potassium carbonate, 4,4-difluorodiphenyl sulfone, triazine phenyl difluoro monomer and diphenol monomer in (1) is (150-220):(50-80):(20-50):

100.

3. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 2, characterized in that: The diphenol monomer is hydroquinone or 4,4'-biphenylene glycol.

4. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: The reaction in (1) is carried out at 140-150° C. for 6-10 h.

5. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: The mass ratio of triazine phenyl polyarylethersulfone and chlorosulfonic acid in (2) is 100:(24-38).

6. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: The reaction in (2) is carried out in an ice-water bath for 1.5-2.5 h.

7. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: In the step (2), sodium hydroxide aqueous solution is added to adjust the pH to 8-9.

8. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 1, characterized in that: The preparation method of the triazine phenyl difluoro monomer is: S1. Add ethylene glycol dimethyl ether solvent, 2-chloro-4,6-diamino-1,3,5-triazine, 3,5-difluorophenylboric acid, tetrakis(triphenylphosphine)palladium, and sodium carbonate aqueous solution into a flask equipped with a condenser reflux tube, introduce nitrogen, heat to 80-85° C., stir to react for 36-48 hours, evaporate under reduced pressure, wash, and recrystallize to obtain 2-(3,5-difluorobenzene)-4,6-diamino-1,3,5-triazine; S2. Add dichloromethane, 2-(3,5-difluorophenyl)-4,6-diamino-1,3,5-triazine, triethylamine and benzoyl chloride into a flask, stir and react at room temperature for 12-18 hours, distill under reduced pressure, wash and recrystallize to obtain triazine phenyl difluoro monomer.

9. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 8, characterized in that: The molar ratio of 2-chloro-4,6-diamino-1,3,5-triazine, 3,5-difluorophenylboric acid, tetrakis(triphenylphosphine)palladium and sodium carbonate in S1 is 100:(140-150):(2.6-3.2):(200-240).

10. The preparation process of the adsorbent material for treating wastewater from the textile printing and dyeing industry according to claim 8, characterized in that: The molar ratio of 2-(3,5-difluorophenyl)-4,6-diamino-1,3,5-triazine, triethylamine and benzoyl chloride in S2 is 100:(200-210):(200-210).

Images