Sulphonated polyamide composite RO (reverse osmosis) membrane for desalting bitter-brackish water and preparation method of sulphonated polyamide composite RO membrane
A technology for sulfonated diamine monomers and compounds is applied in the field of composite RO membrane preparation, which can solve the problems of low flux and energy consumption, and achieve the effects of excellent durability, cheap raw materials and simple synthesis process.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] Example 1 3,3'-(ethane-1,2-bis(azanyl))bis(2,6-dimethylbenzenesulfonic acid), 3,3'-(ethane-1,2-diylbis Synthesis of (azanediyl))bis(2,6-dimethylbenzenesulfonic acid), 3,3'-EDADMBSA(M1), whose structural formula is:
[0043]
[0044] (1) Synthesis of A
[0045] Put 5.0g of 2,6-dimethylaniline and 250mL of methanol into a 500mL round-bottomed flask, slowly add 1.20g of glyoxal solution, fix it on an iron stand, stir at room temperature, and obtain a white precipitate after 8h, filter it with methanol After washing, 5.54 g of white solid A was obtained (the yield was about 89.5%).
[0046] (2) Synthesis of B
[0047]Put 10.0g of A in a 100mL round-bottomed flask, add 200mL of methanol, then slowly add 0.71g of sodium borohydride, install a reflux condenser at the mouth of the bottle, place it in an oil bath at 60°C, stir and reflux, and obtain a viscous solution after 12 hours. Add water after suspension steaming, add water to adjust the pH to 3-7, and suction filter...
Embodiment 2
[0055] Example 2 3,3'-(ethane-1,2-(diaza group))bis(2,6-diisopropylbenzenesulfonic acid), 3,3'-(ethane-1,2- Synthesis of diylbis(azanediyl))bis(2,6-diisopropylbenzenesulfonic acid)EDADIPBSA (M2), whose structural formula is:
[0056]
[0057] (1) Synthesis of A
[0058] Put 5.0g of 2,3,5,6-tetramethylaniline and 250mL of methanol into a 500mL round bottom flask, slowly add 0.82g of glyoxal solution, fix it on an iron stand, stir at room temperature, and obtain a white precipitate after 8h, After suction filtration and washing with methanol, 5.32 g of white solid A was obtained (the yield was about 91.5%).
[0059] (2) Synthesis of B
[0060] Put 10.0g of A in a 100mL round-bottomed flask, add 200mL of methanol, then slowly add 4.03g of sodium borohydride, install a reflux condenser at the mouth of the bottle, place it in an oil bath at 90°C, stir and reflux, and obtain a viscous solution after 12 hours. Add water after suspension steaming, add water to adjust the pH to 3...
Embodiment 3
[0068] Example 3 3,3'-(ethane-1,2-(diaza group))bis(2,6-diethylbenzenesulfonic acid), 3,3'-(ethane-1,2-diylbis Synthesis of (azanediyl))bis(2,6-diethylbenzenesulfonic acid)EDADEBSA(M3), whose structural formula is:
[0069]
[0070] (1) Synthesis of A
[0071] Put 5.0g of 2,6-dimethylaniline and 250mL of methanol into a 500mL round-bottomed flask, slowly add 0.97g of glyoxal solution, fix it on an iron stand, stir at room temperature, obtain a white precipitate after 8h, filter it with After washing with methanol, 5.75 g of white solid A was obtained (the yield was about 96.4%).
[0072] (2) Synthesis of B
[0073] Put 10.0g of A in a 100mL round bottom flask, add 200mL of methanol, then slowly add 12.95g of sodium borohydride, install a reflux condenser at the mouth of the bottle, place it in an ice bath and stir, and after 24 hours, a viscous liquid is obtained, and after suspension steaming, add water, Water was added to adjust the pH to 3-7, and the powder was precip...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More