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Polyamide membranes useful for water softening 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B01D-013/00
  • B32B-027/34
출원번호 US-0856519 (1986-04-28)
발명자 / 주소
  • Cadotte John E. (Minnetonka MN) Walker David R. (Kilmarnock GB6)
출원인 / 주소
  • The Dow Chemical Company (Midland MI 02)
인용정보 피인용 횟수 : 56  인용 특허 : 0

초록

A novel water softening membrane and process for making the same is described. The membrane can be prepared by treating a polyamide reverse osmosis membrane with a strong mineral acid followed by treatment with a rejection enhancing agent. The resulting membrane at transmembrane pressures of 50 psi

대표청구항

A membrane useful for water softening which is prepared by a process comprising: (a) contacting a crosslinked polyamide discriminating layer of a reverse osmosis membrane with an aqueous solution of a compatible strong mineral acid; (b) maintaining the membrane in contact with the acid at an elevate

이 특허를 인용한 특허 (56)

  1. Kurth,Christopher J.; Kloos,Steven D.; Peschl,Jessica A.; Hodgins,Leonard T., Acid stable membranes for nanofiltration.
  2. Koehler, Jeff; Foster, Alexis; Song, Keunwon; Lee, Youngju; Shin, Chongkyu, Additives for salt rejection enhancement of a membrane.
  3. Wohlert, Calvin, Apparatus and methods for solution processing.
  4. Wohlert, Calvin, Apparatus and methods for solution processing using reverse osmosis.
  5. Wohlert, Calvin Wade, Apparatus and methods for solution processing using reverse osmosis.
  6. Isaias, Nicos P.; Karabelas, Anastasios J.; Mitrouli, Sultana T., Application of rejection enhancing agents (REAs) that do not have cloud point limitations on desalination membranes.
  7. Zhang, Yang; Liu, Yiqun; Pan, Guoyuan; Yan, Hao; Xu, Jian; Guo, Min, Complex nanofiltration membrane and the preparation thereof.
  8. Mickols, William E., Composite membrane and method for making the same.
  9. Mickols, William E., Composite membrane and method for making the same.
  10. Mickols, William E., Composite membrane and method for making the same.
  11. William E. Mickols, Composite membrane and method for making the same.
  12. Mickols, William E.; Zhang, Chunming, Composite membrane including coating of polyalkylene oxide and acetophenone compounds.
  13. Mickols, William E.; Zhang, Chunming; Hamilton, Christopher T., Composite membrane including coating of polyalkylene oxide and triazine compounds.
  14. Mickols, William E.; Zhang, Chunming; Hamilton, Christopher T., Composite membrane with coating comprising polyalkylene oxide and biguanide-type compounds.
  15. Mickols, William E.; Zhang, Chunming; Hamilton, Christopher T., Composite membrane with coating comprising polyalkylene oxide and imidazol compounds.
  16. Mickols, William E.; Zhang, Chunming, Composite membrane with coating comprising polyalkylene oxide and oxy-substituted phenyl compounds.
  17. Mickols William E., Composite membrane with polyalkylene oxide modified polyamide surface.
  18. Itoh Hiroki,JPX ; Hirose Masahiko,JPX ; Ishii Katsumi,JPX, Composite semipermeable membrane and production method thereof.
  19. Tomioka,Hiroki, Composite semipermeable membrane, production process thereof, and element, fluid separation equipment and method for water treatment using the same.
  20. Cheng, Shu-Hui; Chen, Jong-Pyng; Wang, En Kuang; Lo, Yi-Chun; Lin, Shan-Shan, Filtration material.
  21. Hirose Masahiko,JPX ; Ito Hiroki,JPX ; Ohara Tomomi,JPX, Highly permeable composite reverse osmosis membrane and a reverse osmosis membrane module using the same.
  22. Kurth, Christopher James; Koehler, Jeffrey Alan; Zhou, Meijuan; Holmberg, Brett Anderson; Burk, Robert Leon, Hybrid TFC RO membranes with nitrogen additives.
  23. Koehler, Jeffrey Alan; Kurth, Christopher James, Hybrid TFC RO membranes with non-metallic additives.
  24. Koehler, Jeffrey Alan; Kurth, Christopher James, Hybrid TFC RO membranes with non-metallic additives.
  25. Kurth, Christopher James; Koehler, Jeffrey Alan; Zhou, Meijuan; Holmberg, Brett Anderson; Burk, Robert Leon, Hybrid nanoparticle TFC membranes.
  26. Kurth, Christopher James; Koehler, Jeffrey Alan; Zhou, Meijuan; Holmberg, Brett Anderson; Burk, Robert Leon, Hybrid nanoparticle TFC membranes.
  27. Kurth, Christopher James; Koehler, Jeffrey Alan; Zhou, Meijuan; Holmberg, Brett Anderson; Burk, Robert Leon, Hybrid nanoparticle TFC membranes.
  28. Tomaschke,John Edward, Low pressure reverse osmosis and nanofiltration membranes and method for the production thereof.
  29. Kurth, Christopher J.; Iverson, Isaac K.; Rolchigo, Philip M.; Kloos, Steven D.; Hodgins, Leonard T., Membranes and methods useful for caustic applications.
  30. McCollam, Robert P., Method for applying tape layer to outer periphery of spiral wound module.
  31. Hayakawa, Kunihiro; Kawakatsu, Takahiro, Method for improving rejection rate of reverse osmosis membrane.
  32. Wang, Hua; Lu, Su; Li, Hua; Rice, Steven Thomas; Suriano, Joseph Anthony; Zhang, Bing; Wang, Chen; Costa, Lawrence Charles; Harrold, Steven John; Olson, David Allen; Peng, Wenqing, Method of making composite membrane.
  33. Jons, Steven D.; Jons, William A., Method of testing spiral wound modules by thermal imaging.
  34. Song, Keunwon; Ko, Young Hoon; Rozenbaoum, Evgueni; Shin, Chongkyu, Methods of enhancing water flux of a TFC membrane using oxidizing and reducing agents.
  35. Hoek, Eric M. V.; Ghosh, Asim K.; Nygaard, Jodie M., Micro-and nanocomposite support structures for reverse osmosis thin film membranes.
  36. Mickols, William E.; Krauss, Richard C.; Niu, Q. Jason; Gaupp, Carleton L, Modified membrane.
  37. Niu, Qingshan Jason; Mickols, William E.; Zhang, Chunming, Modified polyamide membrane.
  38. Kurth,Christopher J.; Kloos,Steven D.; Peschl,Jessica A.; Hodgins,Leonard T., Modified sulfonamide polymers.
  39. Chen, Wen-Yi; Cheng, Shu-Hui; Tseng, Feng-Hung, Nano-fiber material and salt rejection filtration material.
  40. Hodgdon Russell B. (Sudbury MA), Nanofiltration apparatus and processes.
  41. Mickols, William E.; Zhang, Chunming, Polyamide membrane with coating of polyalkylene oxide and polyacrylamide compounds.
  42. Kurth, Christopher J.; Kloos, Steven D.; Peschl, Jessica A.; Hodgins, Leonard T., Polysulfonamide matrices.
  43. Holmberg, Brett Anderson; Koehler, Jeff; Jeon, Hyung Joon, Process for improved water flux through a TFC membrane.
  44. Kurth, Christopher J.; Kloos, Steven D.; Hodgins, Leonard T.; Peschl, Jessica A., Process for preparing a sulfonamide polymer matrix.
  45. Kurth, Christopher J., Process for preparing semipermeable membranes.
  46. Kurth, Christopher J., Process for preparing semipermeable membranes having improved permeability.
  47. Angelini,Peter J.; Haley,Clement J., Production of wetlaid-spunbond laminate membrane support.
  48. Kwon, Hye-Jin; Lee, Seung-Yup; Jeong, Seung-Pyo; Lee, Phill; Shin, Chong-Kyu, Reverse osmosis membrane.
  49. Kurth, Christopher James; Koehler, Jeffrey Alan; Zhou, Meijuan; Holmberg, Brett Anderson; Burk, Robert Leon, Reverse osmosis membranes.
  50. Johnson, Jon E.; Mittag, Matthew D., Spiral wound element and seal assembly.
  51. Jons, Steven D.; Marsh, III, Allyn R., Spiral wound filtration module.
  52. Jons, Steven D.; Marsh, III, Allyn R., Spiral wound filtration module.
  53. Ko, Young-Hoon; Kim, Jae-Hong; Shin, Chong-Kyu; Lee, Phill, Water-treatment separating membrane of high flux having good chlorine resistance.
  54. Ko, Young-Hoon; Kim, Jae-Hong; Shin, Chong-Kyu; Lee, Phill, Water-treatment separating membrane of high flux having good chlorine resistance.
  55. Kim, Jae-Hong; Ko, Young-Hoon; Shin, Chong-Kyu; Lee, Phill, Water-treatment separating membrane of high flux having good chlorine resistance and method of manufacturing the same.
  56. Angelini,Peter J.; Haley,Clement J., Wetlaid-spunbond laminate membrane support.
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