Preparation method of polystyrene microsphere cellulose-based heavy metal absorbent
A cellulose-based, polystyrene technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve poor physical properties, narrow pH range, renewable recycling Use difficulties and other problems to achieve the effect of improving regeneration adsorption capacity, improving physical strength, and improving pH adaptability
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Embodiment 1
[0025] Embodiment 1, operation steps are as follows:
[0026] (1) Soak the microcrystalline cellulose material in 20wt% alkali solution for 1 hour, then activate it in ultrasonic at room temperature, ultrasonic for 5 minutes, ultrasonic power 1000W, and then wash until neutral;
[0027] (2) Mix the cellulose treated in step (1) with succinic anhydride, and carry out esterification reaction in a polytetrafluoroethylene reactor under pyridine activation, the reaction temperature is 100°C, the reaction time is 8h, the mass of cellulose and anhydride The ratio is 1:1, the amount of pyridine is 1ml of pyridine per gram of cellulose, filtered after cooling, and washed 5 times with deionized water-ethanol-acetone successively to obtain the intermediate product acid anhydride esterified cellulose;
[0028] (3) the intermediate product acid anhydride esterified cellulose of step (2) is reacted with polyethyleneimine, and the reaction time is 3 hours, wherein polyethyleneimine is made i...
Embodiment 2
[0030] Embodiment 2, operation steps are as follows:
[0031] (1) Soak the bagasse cellulose material in 15wt% alkali solution for 2 hours, then activate it in ultrasonic at room temperature, the ultrasonic time is 120min, the ultrasonic power is 100W, and then washed until neutral;
[0032] (2) Mix the cellulose obtained in step (1) with maleic anhydride, and carry out esterification reaction in a polytetrafluoroethylene reactor under the activation of triethylamine. The reaction temperature is 125°C, and the reaction time is 5h. The cellulose The mass ratio of acid anhydride to acid anhydride is 1:4, the amount of triethylamine is 10ml of triethylamine per gram of cellulose, filtered after cooling, and washed three times with deionized water-ethanol-acetone in sequence to obtain the intermediate product acid anhydride esterified fiber white;
[0033] (3) The intermediate product acid anhydride esterified cellulose of step (2) is reacted with polyaniline, and the reaction ti...
Embodiment 3
[0035] Embodiment 3, operation steps are as follows:
[0036] (1) Soak the ethyl cellulose material in 5wt% alkali solution for 30 hours, then activate it in ultrasonic at room temperature, ultrasonic time 65min, ultrasonic power 500W, and then wash until neutral;
[0037] (2) The ethyl cellulose treated in step (1) is mixed with succinic anhydride, and the esterification reaction is carried out in a polytetrafluoroethylene reactor under the activation of N-N dimethylformamide, the reaction temperature is 150 ° C, and the reaction time is 1h, the mass ratio of cellulose to acid anhydride is 1:5, the amount of N-N dimethylformamide is 5ml of N-N dimethylformamide per gram of cellulose, filter after cooling, and use deionized water-ethanol-acetone in sequence Washing 5 times to obtain intermediate product acid anhydride esterified cellulose;
[0038](3) the intermediate product acid anhydride esterified cellulose obtained in step (2) was reacted with triethylenetetramine, and t...
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