KR900003255A - Method of producing water softening membrane - Google Patents

Method of producing water softening membrane Download PDF

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Publication number
KR900003255A
KR900003255A KR1019880010730A KR880010730A KR900003255A KR 900003255 A KR900003255 A KR 900003255A KR 1019880010730 A KR1019880010730 A KR 1019880010730A KR 880010730 A KR880010730 A KR 880010730A KR 900003255 A KR900003255 A KR 900003255A
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KR
South Korea
Prior art keywords
membrane
acid
rejection
enhancer
magnesium sulfate
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KR1019880010730A
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Korean (ko)
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KR960012562B1 (en
Inventor
카도테 존이.
알.워커 데이비드
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필름 테크 코포레이션
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Priority to KR1019880010730A priority Critical patent/KR960012562B1/en
Publication of KR900003255A publication Critical patent/KR900003255A/en
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Publication of KR960012562B1 publication Critical patent/KR960012562B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081—After-treatment of organic or inorganic membranes
    • B01D67/0093—Chemical modification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • 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
    • 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
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/30—Cross-linking

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Nanotechnology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

내용 없음No content

Description

물 연화 막의 제조방법Method of producing water softening membrane

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (11)

(a) 역삼투막의 가교결합 폴리아미드 분리층을 상용성 강무기산의 수용액과 접촉시키고; (b) 0.2,중량%의 황산 마그네슘 수용액을 사용하여 역삼투 조건하에 345Pa(50psi) 및 25℃에서 시험하는 경우, 유동성이 적어도 326 1/m2/일(8gfd)이고 황산마그네슘 거부도가 적어도 약 65%인 막이 생성되도록 막을 상승된 온도에서 산과 접촉된 상태로 유지시키는 단계로 이루어짐을 특징으로 하여 물 연화막을 제조하는 방법.(a) contacting the crosslinked polyamide separation layer of the reverse osmosis membrane with an aqueous solution of compatible strong inorganic acid; (b) when tested at 345 Pa (50 psi) and 25 ° C. under reverse osmosis conditions using 0.2, wt.% aqueous magnesium sulfate solution, fluidity is at least 326 1 / m 2 / day (8 gfd) and magnesium sulfate rejection is Maintaining the membrane in contact with an acid at an elevated temperature to produce a membrane that is about 65%. 제1항에 있어서, 막을 거부 증진제와 접촉시켜 황산마그네슘 거부도가 적어도 약 85%인 막을 제조하는 단계를 추가로 포함하는 방법.The method of claim 1, further comprising contacting the membrane with a rejection enhancer to produce a membrane having a magnesium sulfate rejection of at least about 85%. 제1항에 있어서, 산이 황산 마그네슘 역삼투 조건에서 적어도 50%로 막의 물 유동성을 증가시키는 방법.The method of claim 1 wherein the acid increases the water flowability of the membrane by at least 50% under magnesium sulfate reverse osmosis conditions. 제1항에 있어서, 폴리아미드가 가교결합된 방향족 폴리아미드인 방법.The method of claim 1 wherein the polyamide is a crosslinked aromatic polyamide. 제1항에 있어서, 산이 인산, 아인산 또는 황산인 방법.The method of claim 1 wherein the acid is phosphoric acid, phosphorous acid or sulfuric acid. 제5항에 있어서, 폴리아미드가 폴리(페닐렌디아민 트리메스아미드)이고, 산이 인산인 방법.The method of claim 5 wherein the polyamide is poly (phenylenediamine trimesamide) and the acid is phosphoric acid. 제2항에 있어서, 거부 증진제가 타닌산이거나 수성 매질중에서 막을 접촉시키는 가수분해가능한 타닌인 방법.The method of claim 2, wherein the rejection enhancer is tannic acid or hydrolyzable tannins that contact the membrane in an aqueous medium. 제7항에 있어서, 거부 증진제가 스티렌/말레암산 공중합체이거나 C5내지 C7하이드록시알킬 메타크릴레이트 중합체, 공중합체 또는 삼원공중합체인 방법.8. The method of claim 7, wherein the rejection enhancer is a styrene / maleic acid copolymer or a C 5 to C 7 hydroxyalkyl methacrylate polymer, copolymer or terpolymer. 제2항에 있어서, 증진제가 20중량% 이하의 기타의 상용성 에틸렌성 불포화 단량체를 함유하는 하이 드록시에틸 메타크릴레이트 및 메틸 메타크릴레이트 또는 메타크릴아미드의 공중합체인 방법.The method of claim 2 wherein the enhancer is a copolymer of hydroxyethyl methacrylate and methyl methacrylate or methacrylamide containing up to 20% by weight of other compatible ethylenically unsaturated monomers. 제2항에 있어서, 거부 향상제가 다수의 설포늄 또는 4급 암모늄 그룹을 함유하는 1차 중합체 및 다수의 카복실레이트 그룹을 함유하는 2차 중합체로부터 제조된 코아세르베이트인 방법.The method of claim 2, wherein the rejection enhancer is a coacervate prepared from a primary polymer containing a plurality of sulfonium or quaternary ammonium groups and a secondary polymer containing a plurality of carboxylate groups. (A) 경이온을 함유하는 물을 345 내지 690Pa(50 내지 100psi)의 범위의 투과막 압력에서 제2항의 물연화 막의 첫번째 표면과 접촉시키고; (b) 감소된 농도의 경이온을 함유하는 침투물을 물 연화 막의 두번째 표면으로부터 분리시키는 단계로 이루어짐을 특징으로 하여 물의 경도를 감소시키는 방법.(A) contacting water containing light ions with the first surface of the water softening membrane of claim 2 at a permeable membrane pressure in the range of 345 to 690 Pa (50 to 100 psi); (b) separating the permeate containing the reduced concentration of light ions from the second surface of the water softening membrane, thereby reducing the hardness of the water. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880010730A 1988-08-23 1988-08-23 Process of making and using polyamide membranes useful for water softening KR960012562B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880010730A KR960012562B1 (en) 1988-08-23 1988-08-23 Process of making and using polyamide membranes useful for water softening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880010730A KR960012562B1 (en) 1988-08-23 1988-08-23 Process of making and using polyamide membranes useful for water softening

Publications (2)

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KR900003255A true KR900003255A (en) 1990-03-26
KR960012562B1 KR960012562B1 (en) 1996-09-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100397762B1 (en) * 2000-10-09 2003-09-13 (주)쎄미시스코 Method for crystallizing amorphous silicon thin film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100397762B1 (en) * 2000-10-09 2003-09-13 (주)쎄미시스코 Method for crystallizing amorphous silicon thin film

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Publication number Publication date
KR960012562B1 (en) 1996-09-23

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