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WO2018039966A1 - Membrane d'osmose inverse et procédé de traitement de celle-ci - Google Patents

Membrane d'osmose inverse et procédé de traitement de celle-ci Download PDF

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Publication number
WO2018039966A1
WO2018039966A1 PCT/CN2016/097511 CN2016097511W WO2018039966A1 WO 2018039966 A1 WO2018039966 A1 WO 2018039966A1 CN 2016097511 W CN2016097511 W CN 2016097511W WO 2018039966 A1 WO2018039966 A1 WO 2018039966A1
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WO
WIPO (PCT)
Prior art keywords
reverse osmosis
microporous membrane
membrane material
acid chloride
solvent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/097511
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English (en)
Inventor
Changquan QIU
Minling Liu
Kai Huang
Li Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
Honeywell International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honeywell International Inc filed Critical Honeywell International Inc
Priority to PCT/CN2016/097511 priority Critical patent/WO2018039966A1/fr
Publication of WO2018039966A1 publication Critical patent/WO2018039966A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/56—Polyamides, e.g. polyester-amides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
    • B01D69/1251—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction by interfacial polymerisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/219—Specific solvent system

Definitions

  • the present disclosure relates to reverse osmosis membranes, and methods of processing the same.
  • Reverse osmosis is a water purification (e.g., filtering) process in which pressure is used to force water through a semipermeable membrane, which removes particles from the water.
  • Reverse osmosis can be used, for instance, to convert salt water (e.g., sea water) and/or brackish water into clean drinking water by removing the salt and other effluent materials from the water.
  • salt water e.g., sea water
  • reverse osmosis can be used to remove potentially harmful contaminants, such as heavy metals and/or pesticide residues, from the water.
  • Figures 1A-1B illustrate process steps associated with forming a reverse osmosis membrane in accordance with one or more embodiments of the present disclosure.
  • Figure 2 illustrates an image of a microporous membrane material of a reverse osmosis membrane processed in accordance with one or more embodiments of the present disclosure.
  • Figure 3 illustrates an image of a polyamide material of a reverse osmosis membrane processed in accordance with one or more embodiments of the present disclosure.
  • a reverse osmosis membrane and a method of processing the same are described herein.
  • one or more embodiments include forming a polyamide material on a microporous membrane material by reacting a polyfunctional amine with a polyfunctional acid chloride on the microporous membrane material and adding an organic solvent and a ketone co-solvent to the reaction of the polyfunctional amine with the polyfunctional acid chloride.
  • Reverse osmosis membranes processed in accordance with the present disclosure may have a better and/or higher performance than reverse osmosis membranes processed in accordance with previous approaches (e.g., using previous interfacial polymerization processes) .
  • reverse osmosis membranes processed in accordance with the present disclosure may have a higher water flux and/or a higher rejection rate than reverse osmosis membranes processed in accordance with previous approaches.
  • reverse osmosis membranes processed in accordance with the present disclosure may be more suitable to residential (e.g., domestic) uses and settings than reverse osmosis membranes processed using previous approaches.
  • a” or “a number of” something can refer to one or more such things.
  • a number of structures can refer to one or more structures.
  • Figures 1A-1B illustrate process steps associated with forming (e.g., making) a reverse osmosis membrane 100 in accordance with one or more embodiments of the present disclosure.
  • Figure 1A illustrates a schematic cross-sectional view of a microporous membrane material 102 of reverse osmosis membrane 100.
  • Microporous membrane material 102 can be, for example, a polysulfone (PSf) material, such as, for instance, PSf-1 or PSf-2. However, embodiments of the present disclosure are not so limited. For instance, in some embodiments, microporous membrane material 102 can be a polyethersulfone (PES) material.
  • PSf polysulfone
  • PSf-2 polysulfone
  • PES polyethersulfone
  • Microporous membrane material 102 can be a porous ultrafiltration (UF) membrane material.
  • UF ultrafiltration
  • microporous membrane material 102 can have a mean pore size of 7 to 15 nanometers (nm) .
  • microporous membrane material 102 can have a thickness (e.g., distance from top to bottom) of 30 to 80 micrometers ( ⁇ m) , acontact angle of 60 to 90 degrees, and a water flux of 160 to 300 Liters/m 2 /hour/bar (LMH/bar) .
  • Microporous membrane material 102 can be formed, for example, by casting a polysulfone/polyethylene glycol/N-methyl-2-pyrrolidone (PSf/PEG/NMP) solution on a polyethylene terephthalate (PET) material (e.g., fabric) .
  • PET polyethylene terephthalate
  • This structure can be exposed to air (e.g., for 30 seconds) , and then immersed in water at ambient (e.g., room) temperature.
  • the PSf/PEG/NMP solution can be cast on the PET material using, for example, a casting knife. Further, the PSf/PEG/NMP solution can have a PSf concentration level of 20 weight percent (wt. %) , a PEG concentration level of 2 wt. %, and an NMP concentration level of 78%, for instance.
  • the PET material may have a thickness of, for instance, 100 micrometers ( ⁇ m) .
  • Figure 1B illustrates a schematic cross-sectional view of the structure shown in Figure 1A after a subsequent processing step.
  • apolyamide material 104 is formed on microporous membrane material 102.
  • polyamide material 104 is formed on the top surface of microporous membrane material 102, as illustrated in Figure 1B.
  • Microporous membrane material 102 can be the substrate for polyamide material 104. Further, polyamide material 104 can be a thin material as compared to microporous membrane material 102 (e.g., microporous membrane material 102 may be much thicker than polyamide material 104) , as illustrated in Figure 1B.
  • Polyamide material 104 can be formed on microporous membrane material 102 by, for example, reacting a polyfunctional amine with a polyfunctional acid chloride on microporous membrane material 102 (e.g., on the top surface of microporous membrane material 102) , and adding an organic solvent and a ketone co-solvent to the reaction of the polyfunctional amine with the polyfunctional acid chloride.
  • the reaction of the polyfunctional amine with the polyfunctional acid chloride can be (e.g. occur as) , for example, part of an interfacial polymerization process. That is, polyamide material 104 can be formed on microporous membrane material 102 using an interfacial polymerization process that includes a ketone co-solvent.
  • the interfacial polymerization process can include contacting the top surface of microporous membrane material 102 with an amine solution, and then contacting the top surface of microporous membrane material 102 with a mixture of an acid chloride solution, an organic solvent, and a ketone co-solvent after contacting the top surface with the amine solution.
  • Contacting the top surface of microporous membrane material 102 with the amine solution can include, for instance, immersing microporous membrane material 102 in the amine solution, and then removing the excess amine solution from the top surface of microporous membrane material 102 after the immersion.
  • Microporous membrane material 102 may remain immersed in the amine solution for two minutes, and the top surface of microporous membrane material 102 may subsequently remain in contact with the mixture of the acid chloride solution, organic solvent, and ketone co-solvent for one minute, for instance. The structure can then be washed with deionized water.
  • the polyfunctional amine can be, for example, m-Phenylenediamine (MPD)
  • the polyfunctional acid chloride can be, for example, trimesoyl chloride (TMC)
  • the amine solution can have an MPD concentration level of 1.5 wt. %
  • the acid chloride solution can have a TMC concentration level of 0.08 wt. %.
  • embodiments of the present disclosure are not limited to this example,
  • the amine solution can have an MPD concentration level of 0.5 to 1.5 wt. %
  • the acid chloride solution can have a TMC concentration level of 0.05 to 0.3 wt. %.
  • the organic solvent can be, for example, paraffin (e.g., kerosene) .
  • the organic solvent can be hexane, such as, for instance, cyclo-hexane, or decane.
  • the ketone co-solvent can be, for example, acetone or butanone.
  • the mixture of the acid chloride solution, organic solvent, and ketone co-solvent can have an acetone/hexane concentration level of 2.0 wt. %.
  • embodiments of the present disclosure are not limited to this example.
  • the mixture of the acid chloride solution, organic solvent, and ketone co-solvent can have an acetone/hexane concentration level of 0.0 to 4.0 wt. %.
  • Reverse osmosis membrane 100 illustrated in Figure 1B can be part of (e.g., used in) a reverse osmosis water purification (e.g., filtering) system.
  • a reverse osmosis water purification e.g., filtering
  • pressure can be used to force water through membrane 100, and membrane 100 can remove particles from the water as it flows through the membrane, as will be appreciated by one of skill in the art.
  • reverse osmosis membrane 100 can be used to remove potentially harmful contaminants, such as heavy metals (e.g., arsenic, mercury, lead, cadmium, etc. ) and/or pesticide residues, from the water.
  • membrane 100 can be part of a point-of-use water purification system, such as, for instance, a residential (e.g., domestic) water purification system used to filter the tap and/or drinking water of a residence.
  • a residential (e.g., domestic) water purification system used to filter the tap and/or drinking water of a residence.
  • embodiments of the present disclosure are not limited to a particular type of use or application for membrane 100.
  • polyamide material 104 can selectively separate contaminants, such as heavy metals and/or pesticide residues, for instance, from the water. That is, polyamide material 104 can be a selective material that can selectively separate the contaminants from the water.
  • Reverse osmosis membrane 100 can have a high water flux and a high rejection rate.
  • reverse osmosis membrane 100 can have a water flux of 6.0 to 7.0 LMH/bar, and a rejection rate of at least 97%.
  • reverse osmosis membrane 100 may be suitable to residential (e.g., domestic) uses and settings, such as, for instance, filtering the tap and/or drinking water of a residence.
  • reverse osmosis membrane can have a water flux 6.1 LMH/bar and a rejection rate of 97.8%in embodiments in which the amine solution used in the interfacial polymerization process used to form polyamide material 104 on microporous membrane material 102 has an MPD concentration level of 1.5 wt. %, the acid chloride solution used in the interfacial polymerization process has a TMC concentration level of 0.08 wt. %, and the mixture of the acid chloride solution, organic solvent, and ketone co-solvent used in the interfacial polymerization process has an acetone/hexane concentration level of 2.0 wt. %.
  • embodiments of the present disclosure are not limited to this example.
  • Figure 2 illustrates an image of a microporous membrane material 202 of a reverse osmosis membrane processed in accordance with one or more embodiments of the present disclosure.
  • the image shown in Figure 2 is a scanning electron microscope (SEM) image of microporous membrane material 202.
  • Microporous membrane material 202 can be, for example, microporous membrane material 102 of reverse osmosis membrane 100 previously described in connection with Figures 1A-1B.
  • the image shown in Figure 2 can be a cross-sectional view of reverse osmosis membrane 100 illustrated in Figure 1A (e.g., after microporous membrane material 102 has been formed, but before polyamide material 104 is formed on microporous membrane material 102) .
  • microporous membrane material 202 can be a PSf material or a PES material, as previously described in connection with Figure 1A. Further, microporous membrane material 202 can be a porous UF membrane material with a thickness of 30 to 80 ⁇ m, acontact angle of 60 to 90 degrees, and a water flux of 160 to 300 LMH/bar, as previously described in connection with Figure 1A. Microporous membrane material 202 can be formed, for example, by casting a PSf/PEG/NMP solution on a PET material, as previously described in connection with Figure 1A.
  • Figure 3 illustrates an image of a polyamide material 304 of a reverse osmosis membrane processed in accordance with one or more embodiments of the present disclosure.
  • the image shown in Figure 3 is an SEM image of microporous membrane material 202.
  • Polyamide material 304 can be, for example, polyamide material 104 of reverse osmosis membrane previously described in connection with Figures 1A-1B.
  • the image shown in Figure 3 can be a top view of reverse osmosis membrane 100 illustrated in Figure 1B (e.g., after polyamide material 104 has been formed on microporous membrane material 102) . That is, the image shown in Figure 3 can be a view of the top surface of polyamide material 104.
  • polyamide material 304 can a thin, selective material, as previously described in connection with Figure 1B.
  • Polyamide material 304 can be formed using an interfacial polymerization process that includes a ketone co-solvent, as previously described in connection with Figure 1B.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne une membrane d'osmose inverse (100) et le procédé de traitement de celle-ci. Le procédé comprend la formation d'un matériau de polyamide (104) sur un matériau de membrane microporeuse (102) par réaction d'une amine polyfonctionnelle avec un chlorure d'acide polyfonctionnel sur le matériau de membrane microporeuse (102) et ajout d'un solvant organique et d'un co-solvant de cétone à la réaction de l'amine polyfonctionnelle avec le chlorure d'acide polyfonctionnel.
PCT/CN2016/097511 2016-08-31 2016-08-31 Membrane d'osmose inverse et procédé de traitement de celle-ci Ceased WO2018039966A1 (fr)

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PCT/CN2016/097511 WO2018039966A1 (fr) 2016-08-31 2016-08-31 Membrane d'osmose inverse et procédé de traitement de celle-ci

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PCT/CN2016/097511 WO2018039966A1 (fr) 2016-08-31 2016-08-31 Membrane d'osmose inverse et procédé de traitement de celle-ci

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113828174A (zh) * 2021-10-09 2021-12-24 苏州苏瑞膜纳米科技有限公司 一种双层复合结构反渗透膜及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060249446A1 (en) * 2005-05-04 2006-11-09 Gary Yeager Solvent-resistant composite membrane composition
CN102101020A (zh) * 2011-01-30 2011-06-22 中国科学院宁波材料技术与工程研究所 高效能反渗透/纳滤复合分离膜材料、其制备方法及用途
CN103657454A (zh) * 2013-12-17 2014-03-26 北京碧水源膜科技有限公司 一种新型聚酰胺反渗透膜的制备方法
CN104548958A (zh) * 2013-10-15 2015-04-29 中国石油化工股份有限公司 一种高截留率的复合反渗透膜及制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060249446A1 (en) * 2005-05-04 2006-11-09 Gary Yeager Solvent-resistant composite membrane composition
CN102101020A (zh) * 2011-01-30 2011-06-22 中国科学院宁波材料技术与工程研究所 高效能反渗透/纳滤复合分离膜材料、其制备方法及用途
CN104548958A (zh) * 2013-10-15 2015-04-29 中国石油化工股份有限公司 一种高截留率的复合反渗透膜及制备方法
CN103657454A (zh) * 2013-12-17 2014-03-26 北京碧水源膜科技有限公司 一种新型聚酰胺反渗透膜的制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113828174A (zh) * 2021-10-09 2021-12-24 苏州苏瑞膜纳米科技有限公司 一种双层复合结构反渗透膜及其制备方法

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