Patent US5833854A successfully refreshed from Google Patents.
US5833854A
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US
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Semipermeable composite membrane and a method for the preparation of such a membrane
Assignee: X Flow BV
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Filing: 1996-12-17
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Granted: 1998-11-10
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Expires: 2016-12-17
Abstract
Abstract The invention relates to a semipermeable composite membrane comprising a microporous substrate provided with a semipermeable microporous substrate membrane which is provided, on at least one side, with a water-permeable polymer layer, said polymer layer containing the interfacial-polymerization product of an amine-terminal dendrimer and a compound polymerizing therewith. According to the invention, the amine-terminal dendrimers used, are poly(alkylene imine) dendrimers. These dendrimers preferably have terminal primary and/or secondary amine groups. In particular, use is made of a 1,4-diaminobutane 4!: (1-azabutylidene) x-4 : propylamine or propyl-N-alkyl-amine, wherein x=4, 8, 16, 32 or 64. Expediently, the compound which polymerizes with the dendrimer is selected from the group consisting of a carboxylic acid or carboxylic acid derivative, a sulphonic acid or sulphonic acid derivative, and an isocyanate compound. The invention also relates to a method for the preparation of such a semipermeable composite membrane.
Inventors
- 👤 Arie Zwijnenburg
- 👤 Jan Willem De Rijk
- 👤 Casper J. N. Rekers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:58
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/58; B01D71/60; B01D69/00; B01D69/12; B01D69/125; B01D69/1251
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
40 words
A semipermeable composite membrane comprising a semipermeable microporous substrate membrane which is provided, on at least one surface, with a water-permeable polymer layer, wherein said polymer layer comprises the interfacial-polymerization product of an amine-terminal dendrimer and a compound polymerizing therewith.
Claim 2
Dependent Claim
40 words
A semipermeable composite membrane comprising a semipermeable microporous substrate membrane which is provided, on at least one surface, with a water-permeable polymer layer, wherein said polymer layer comprises the interfacial-polymerization product of an amine-terminal dendrimer and a compound polymerizing therewith.
Claim 3
Dependent Claim
16 words
A semipermeable composite membrane according to claim 1, wherein said amine-terminal dendrimer is a poly(alkylenimine) dendrimer.
Claim 4
Dependent Claim
20 words
A semipermeable composite membrane according to claim 1, wherein said amine-terminal dendrimer is a poly(alkylenimine) dendrimer having primary amine groups.
Claim 5
Dependent Claim
24 words
A semipermeable composite membrane according to claim 3, wherein said poly(alkylenimine) dendrimer having primary amine groups is a propylenimine dendrimer having primary amine groups.
Claim 6
Dependent Claim
19 words
A semipermeable composite membrane according to claim 1, wherein said amine-terminal dendrimer is a poly(alkylenimine) having secondary amine groups.
Claim 7
Dependent Claim
24 words
A semipermeable composite membrane according to claim 5, wherein said poly(alkylenimine) dendrimer having secondary amine groups is a propylenimine dendrimer having secondary amine groups.
Claim 8
Dependent Claim
26 words
A semipermeable composite membrane according to claim 1, wherein said dendrimer is a 1,4-diaminobutane 4!: (1-azabutylidene) x-4 : propylamine, wherein x=4, 8, 16, 32 or 64.
Claim 9
Dependent Claim
26 words
A semipermeable composite membrane according to claim 1, wherein said dendrimer is a 1,4-diaminobutane 4!: (1-azabutylidene) x-4 : propyl-N-alkylamine, wherein x=4, 8, 16, 32 or 64.
Claim 10
Dependent Claim
41 words
A semipermeable composite membrane according to claim 1, wherein said compound which polymerizes with said dendrimer is selected from the group consisting of a carboxylic acid, a carboxylic acid derivative, a sulphonic acid, a sulphonic acid derivative, and an isocyanate compound.
Claim 11
Dependent Claim
30 words
A semipermeable composite membrane according to claim 9, wherein said carboxylic acid derivative is selected from the group consisting of isophthaloyl chloride, terephthaloyl chloride, trimesoyl chloride and thiadiazole polyacid derivatives.
Claim 12
Dependent Claim
20 words
A semipermeable composite membrane according to claim 10, wherein said thiadiazole polyacid derivatives are selected from the thiadiazoledicarboxylic acid halides.
Claim 13
Dependent Claim
18 words
A semipermeable composite membrane according to claim 11, wherein said thiadiazole polyacid derivatives consist of 1,2,5-thiadiazole-3,4-dicarboxylic acid chloride.
Claim 14
Dependent Claim
25 words
A semipermeable composite membrane according to claim 9, wherein said sulphonic acid derivative is selected from the group consisting of di- and trifunctional sulphonyl chlorides.
Claim 15
Dependent Claim
18 words
A semipermeable composite membrane according to claim 13, wherein said sulphonic acid derivative consists of 1,3,5-benzenetrisulphonyl chloride,4,4'-(phenoxybenzene)disulphonyl chloride.
Claim 16
Dependent Claim
18 words
A semipermeable composite membrane according to claim 13, wherein said sulphonic acid derivative consists of 1,3,5-benzenetrisulphonyl chloride,4,4'-diphenyldisulphonyl chloride.
Claim 17
Dependent Claim
16 words
A semipermeable composite membrane according to claim 9, wherein said isocyanate compound is an aromatic isocyanate.
Claim 18
Dependent Claim
16 words
A semipermeable composite membrane according to claim 16, wherein said isocyanate compound consists of toluene diisocyanate.
Claim 19
Dependent Claim
34 words
A semipermeable composite membrane according to claim 1, wherein said semipermeable substrate membrane is selected from the group consisting of a polysulphone membrane, a polyethersulphone membrane, a polyacrylonitrile membrane and a poly(vinylidene fluoride) membrane.
Claim 20
Dependent Claim
36 words
A semipermeable composite membrane according to claim 1, wherein said semipermeable substrate membrane has a thickness of from 20 to 200 μm, and the water-permeable polymer layer has a thickness of from 0.05 to 1 μm.
Claim 21
Dependent Claim
20 words
A semipermeable composite membrane according to claim 19, wherein said semipermeable substrate membrane has a thickness of about 100 μm.
Claim 22
Dependent Claim
45 words
A semipermeable composite membrane according to claim 1, wherein said membrane is a reverse osmosis membrane which exhibits a flux of at least 120 l/m 2 .h and an NaCl retention of at least 95% for a pH of the feed of less than 5.0.
Claim 23
Independent Claim
52 words
A method for the preparation of a semipermeable composite membrane which involves the step of providing a semipermeable substrate membrane, on at least one surface, with a water-permeable polymer layer, wherein said polymer layer is formed by means of an interfacial polymerization reaction between an amine-terminal dendrimer and a compound polymerizing therewith.
Claim 24
Independent Claim
52 words
A method for the preparation of a semipermeable composite membrane which involves the step of providing a semipermeable substrate membrane, on at least one surface, with a water-permeable polymer layer, wherein said polymer layer is formed by means of an interfacial polymerization reaction between an amine-terminal dendrimer and a compound polymerizing therewith.
Claim 25
Dependent Claim
14 words
A method according to claim 22, wherein said amine-terminal dendrimer is a poly(alkylenimine) dendrimer.
Claim 26
Dependent Claim
18 words
A method according to claim 22, wherein said amine-terminal dendrimer is a poly(alkylenimine) dendrimer having primary amine groups.
Claim 27
Dependent Claim
23 words
A method according to claim 24, wherein said amine-terminal poly(alkylenimine) dendrimer having primary amine groups is a propylenimine dendrimer having primary amine groups.
Claim 28
Dependent Claim
18 words
A method according to claim 22, wherein said amine-terminal dendrimer is a poly(alkylenimine) dendrimer having secondary amine groups.
Claim 29
Dependent Claim
22 words
A method according to claim 26, wherein said poly(alkylenimine) dendrimer having secondary amine groups is a propylenimine dendrimer having secondary amine groups.
Claim 30
Dependent Claim
24 words
A method according to claim 22, wherein said dendrimer is a 1,4-diaminobutane 4!: (1-azabutylidene) x-4 : propylamine, wherein x=4, 8, 16, 32 or 64.
Claim 31
Dependent Claim
24 words
A method according to claim 22, wherein said dendrimer is a 1,4-diaminobutane 4!: (1-azabutylidene) x-4 : propyl-N-alkylamine, wherein x=4, 8, 16, 32 or 64.
Claim 32
Dependent Claim
39 words
A method according to claim 22, wherein said compound which polymerizes with the dendrimer is selected from the group consisting of a carboxylic acid or carboxylic acid derivative, a sulphonic acid or sulphonic acid derivative, and an isocyanate compound.
Claim 33
Dependent Claim
28 words
A method according to claim 30, wherein said carboxylic acid derivative is selected from the group consisting of isophthaloyl chloride, terephthaloyl chloride, trimesoyl chloride and thiadiazole polyacid derivatives.
Claim 34
Dependent Claim
18 words
A method according to claim 31, wherein said thiadiazole polyacid derivatives are selected from the thiadiazoledicarboxylic acid halides.
Claim 35
Dependent Claim
16 words
A method according to claim 32, wherein said thiadiazole polyacid derivatives consist of 1,2,5-thiadiazole-3,4-dicarboxylic acid chloride.
Claim 36
Dependent Claim
24 words
A method according to claim 30, wherein said sulphonic acid derivative is selected from the group consisting of the di- and trifunctional sulphonyl chlorides.
Claim 37
Dependent Claim
17 words
A method according to claim 34, wherein said sulphonic acid derivative consists of 1,3,5-benzenetrisulphonyl chloride, 4,4'-(phenoxybenzene)-disulphonyl chloride.
Claim 38
Dependent Claim
17 words
A method according to claim 34, wherein said sulphonic acid derivative consists of 1,3,5-benzenetrisulphonyl chloride, 4,4'-diphenyldisulphonyl chloride.
Claim 39
Dependent Claim
14 words
A method according to claim 30, wherein said isocyanate compound is an aromatic isocyanate.
Claim 40
Dependent Claim
14 words
A method according to claim 37, wherein said isocyanate compound consists of toluene diisocyanate.
Claim 41
Dependent Claim
33 words
A method according to claim 22, wherein said semipermeable substrate membrane used is selected from the group consisting of a polysulphone membrane, a polyethersulphone membrane, a polyacrylonitrile membrane and a poly(vinylidene fluoride) membrane.
References Cited (Backward Citations)
US3951815A
Cited
US4388189A
Cited
US4631337A
Cited
US4721568A
Cited
US4885091A
Cited
US4824574A
Cited
US4812270A
Cited
US4828708A
Cited
US4859384A
Cited
US4876009A
Cited
US4964998A
Cited
WO1993014147A1
Cited
WO1995002008A1
Cited
WO1995020619A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |