A kind of reverse osmosis membrane, preparation method and application thereof
A technology of reverse osmosis membrane and reaction time, applied in semipermeable membrane separation, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., can solve the problem of high desalination rate, unreachable performance, and inability to get rid of the shackles of MPD chemical structure and other problems, to achieve the effect of excellent durability, easy promotion, and simple synthesis process
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Embodiment 1
[0038] Example 1 N , N ’-di(4-sulfophenyl)methylene diamine N , N Synthesis of '-bis(4-sulfophenyl)methyldiamine (NSMDA), whose structural formula is:
[0039]
[0040] (1) Synthesis of A
[0041] Put 28.6 g of benzotriazole white flocculent powder and 250 mL of ethanol into a 500 mL round bottom flask, slowly add 22.5 g of aniline solution and 7 mL of formaldehyde solution, fix it on an iron stand, stir at room temperature, and obtain The white precipitate was filtered by suction and washed with ethanol to obtain 28.6 g of white solid A (the yield was about 75%).
[0042] (2) Synthesis of B
[0043] Put 28.6 g of A in a 500 mL round bottom flask, add 200 mL of tetrahydrofuran solution, then slowly add 11.0 g of sodium borohydride, install a reflux condenser at the mouth of the bottle, and place it in an oil bath for 60 o C was stirred and refluxed, and a viscous liquid was obtained after 12 hours. After suspension steaming, water was added, and dilute hydrochloric ac...
Embodiment 2
[0051] Example 2 N , N ’-di(4-sulfophenyl)ethylene diamine N , N Synthesis of '-bis(4-sulfophenyl)ethylenediamine (NSEDA), whose structural formula is:
[0052]
[0053] (1) Synthesis of A
[0054] Put 28.6 g of benzotriazole white flocculent powder and 250 mL of ethanol into a 500 mL round-bottomed flask, slowly add 22.5 g of aniline solution and 14 mL of glyoxal solution, fix on an iron stand, stir at room temperature for 8 h Finally, a white precipitate was obtained, which was filtered by suction and washed with ethanol to obtain 42.1 g of white solid A (the yield was about 80%).
[0055] (2) Synthesis of B
[0056] Put 32.1 g of A in a 500 mL round bottom flask, add 200 mL of tetrahydrofuran solution, then slowly add 11.0 g of sodium borohydride, install a reflux condenser at the mouth of the bottle, and place it in an oil bath for 60 o C was stirred and refluxed, and a viscous liquid was obtained after 12 hours. After suspension steaming, water was added, and dil...
Embodiment 3
[0064] Example 3 N , N ’-di(4-sulfophenyl)propylene diamine N , N Synthesis of '-bis(4-sulfonic acid phenyl)propylenediamine (NSPDA), whose structural formula is:
[0065]
[0066] (1) Synthesis of A
[0067] Put 28.6 g of benzotriazole white flocculent powder and 250 mL of ethanol in a 500 mL round bottom flask, slowly add 22.5 g of aniline solution and 16 mL of methylglyoxal solution, fix on an iron stand, stir at room temperature, and after 8 h A white precipitate was obtained, which was filtered by suction and washed with ethanol to obtain 48.4 g of white solid A (the yield was about 83%).
[0068] (2) Synthesis of B
[0069] Put 33.8 g of A in a 500 mL round bottom flask, add 200 mL of tetrahydrofuran solution, then slowly add 11.0 g of sodium borohydride, install a reflux condenser at the mouth of the bottle, and place it in an oil bath for 60 o C was stirred and refluxed, and a viscous liquid was obtained after 12 hours. After suspension steaming, water was add...
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