[특허]Polyamine-polyamide composite nanofiltration membrane for water softening

Polyamine-polyamide composite nanofiltration membrane for water softening 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-061/08
출원번호	US-0584555 (1990-09-14)
발명자 / 주소	Hodgdon Russell B. (Concord MA)
출원인 / 주소	Ionics, Incorporated (Watertown MA 02)
인용정보	피인용 횟수 : 30 인용 특허 : 0

초록 ▼

A thin film composite (TPC) ultrafilter/hyperfilter water softening membrane on a microporous substrate is produced by an interfacial polymerization reaction between (1) an aqueous phase comprising a blend of water soluble and water dispersible compounds, the former containing piperazine and polyamines, the latter using a chlorine or other oxidant reacting compound which protects the resulting membrane from damage by any chlorine present and (2) an organic phase comprising polyfunctional agents capable of reacting and/or polmerizing with one or more of the ingredients of said aqueous phase.

대표청구항 ▼

A water insoluble film comprising the polymerization product of: at least one compound selected from the group consisting of compounds having Formula I and II: NH2－CH2CH2－NH CH2CH2)nNH CH2CH2NH2 I where n is a number between 0 and about 12; NH2－CH2CH2－NH CH2CH2)nNH CH2CH2NH2 II where n is a number between about 200 and about 700; at least one compound selected from the group consisting of compounds having Formulas III through VI: R1－NH－A－NH R2 III where A represents an alkylene group having from 2 to 8 carbon atoms, a divalent alicyclic group, a divalent aromatic group and where R1 and R2 each represent an alkyl group having from 1 to 3 carbon atoms. [Figure] wherein R3 represents an alkylene group having from 0 to 4 carbon atoms, R4 and R5 each represents an alkyl group having from 1 to 3 carbon atoms; and i and j each represents an integer of 0 to 4; [Figure] wherein R6 and R7 each represent an alkyl group having from 1 to 3 carbon atoms and k, l and m each represent an integer of 0 to 4; [Figure] wherein R8 represents an alkyl group having from 1 to 3 carbon atoms, n represents 0, 1, or 2, and p represents an integer of 0 to 4; and at least one soluble compound having at least 2 functional moieties each selected from the group consisting of carboxylic acid halides, carboxylic acid anhydrides, haloformyls, haloformates, sulfonyl halides and isocyanate; said film characterized by having initially simultaneously a calcium ion rejection in excess of 50 percent and a sodium ion rejection less than 50 percent in a reverse osmosis test.

이 특허를 인용한 특허 (30)

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Costa Lawrence C. (Mansfield MA), Catalyst mediated method of interfacial polymerization on a microporous support, and polymers, fibers, films and membran.
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John E. Tomaschke, Interfacially polymerized, bipiperidine-polyamide membranes for reverse osmosis and/or nanofiltration and process for making the same.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Polyamine-polyamide composite nanofiltration membrane for water softening 원문보기

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Polyamine-polyamide composite nanofiltration membrane for water softening 원문보기

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