• 专利标题:   Preparing reverse osmosis membrane useful for desalination of boron sea water, comprises e.g. contacting base film with polyamine monomer solution, obtaining polyamide layer, heating, immersing in diethanolamine solution, immersing reverse in carboxy activator solution, coating and post-treating.
  • 专利号:   CN116143233-A
  • 发明人:   LIANG S, HU L, XIAO J, LIU G, YANG X
  • 专利权人:   VONTRON TECHNOLOGY CO LTD
  • 国际专利分类:   B01D061/02, B01D067/00, B01D071/30, B01D071/34, B01D071/42, B01D071/56, B01D071/64, B01D071/68, B01D071/78, C02F001/44, C02F101/10, C02F103/08
  • 专利详细信息:   CN116143233-A 23 May 2023 C02F-001/44 202352 Chinese
  • 申请详细信息:   CN116143233-A CN11386270 22 Nov 2021
  • 优先权号:   CN11386270

▎ 摘  要

NOVELTY - Preparing reverse osmosis membrane comprises (i) contacting base film with a polyamine monomer solution containing carboxylated two-dimensional nanomaterials, (ii) contacting base film obtained in step (i) with acid chloride monomer solution to obtain polyamide layer on base film, (iii) heating further crosslinks polyamide layer to obtain reverse osmosis membrane, (iv) immersing reverse osmosis membrane in diethanolamine solution, (v) immersing reverse osmosis membrane in carboxy activator solution, and immersing in graft polymer solution, (vi) immersing reverse osmosis membrane in cross-linking agent solution, (vii) coating reverse osmosis membrane surface with protective layer solution, and (viii) post-treating to obtain final reverse osmosis membrane. USE - The method is useful for preparing reverse osmosis membrane for desalination of boron sea water (claimed). ADVANTAGE - The method: is simple and easy; and overcomes defect of high deboronation capacity but low flux of reverse osmosis membrane in prior art. The membrane has high flux and high or close salt rejection performance than original membrane, and has high boron removal performance.