Patent US4661254A successfully refreshed from Google Patents.
US4661254A
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Chlorine-resistant semipermeable membranes
Assignee: Honeywell UOP LLC
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Filing: 1985-05-23
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Granted: 1987-04-28
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Expires: 2005-05-23
Abstract
Abstract Chlorine-resistant semipermeable membranes which comprise an interfacial polymerization reaction product composited on a porous backing support material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of triaryl triamine. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane resistant to attack by chlorine which is present in the water.
Inventors
- 👤 Joseph J. Zupancic
- 👤 Raymond J. Swedo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:13
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/12; B01D69/125; B01D69/1251
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
66 words
A chlorine-resistant semipermeable membrane comprising a porous support backing material having supported thereon an interfacial polymerized condensation reaction product resulting from the reaction of (1) a triaryl triamine selected from the group consisting of 2,3-bis(p-aminobenzyl) aniline, 2,4-bis(p-aminobenzyl) aniline, 2,5-bis(p-aminobenzyl) aniline, 2,6-bis(p-aminobenzyl) aniline, 2,3-bis(o-aminobenzyl) aniline, 2,4-bis(o-aminobenzyl) aniline, 2,5-bis(o-aminobenzyl) aniline, 2,6-bis(o-aminobenzyl) aniline, 2,3-bis(m-aminobenzyl) aniline, 2,4-bis(m-aminobenzyl) aniline, 2,5-bis(m-aminobenzyl) aniline, and 2,6-bis(m-aminobenzyl) aniline and (2) an aromatic polycarboxylic acid chloride.
Claim 2
Dependent Claim
66 words
A chlorine-resistant semipermeable membrane comprising a porous support backing material having supported thereon an interfacial polymerized condensation reaction product resulting from the reaction of (1) a triaryl triamine selected from the group consisting of 2,3-bis(p-aminobenzyl) aniline, 2,4-bis(p-aminobenzyl) aniline, 2,5-bis(p-aminobenzyl) aniline, 2,6-bis(p-aminobenzyl) aniline, 2,3-bis(o-aminobenzyl) aniline, 2,4-bis(o-aminobenzyl) aniline, 2,5-bis(o-aminobenzyl) aniline, 2,6-bis(o-aminobenzyl) aniline, 2,3-bis(m-aminobenzyl) aniline, 2,4-bis(m-aminobenzyl) aniline, 2,5-bis(m-aminobenzyl) aniline, and 2,6-bis(m-aminobenzyl) aniline and (2) an aromatic polycarboxylic acid chloride.
Claim 3
Dependent Claim
35 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said aromatic polycarboxylic acid chloride is selected from the group consisting of isophthaloyl chloride, terephthaloyl chloride, trimesoyl chloride, and pyridine dicarboxylic acid chloride.
Claim 4
Dependent Claim
46 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine is present in said interfacial polymerized condensation reaction product in a weight ratio in the range of from about 0.1:1 to about 40:1 of triaryl triamine to aromatic polycarboxylic acid chloride.
Claim 5
Dependent Claim
19 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said porous support backing material comprises polysulfone.
Claim 6
Dependent Claim
19 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said porous support backing material comprises polycarbonate.
Claim 7
Dependent Claim
20 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said porous support backing material comprises polyphenyl ether.
Claim 8
Dependent Claim
19 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said porous support backing material comprises polyamide.
Claim 9
Dependent Claim
27 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine comprises 2,4-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 10
Dependent Claim
27 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine comprises 2,6-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 11
Dependent Claim
27 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine comprises 2,3-bis(m-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises isophthaloyl chloride.
Claim 12
Dependent Claim
27 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine comprises 2,5-bis(o-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises terephthaloyl chloride.
Claim 13
Dependent Claim
33 words
The chlorine-resistant semipermeable membrane as set forth in claim 1 in which said triaryl triamine comprises 2,4-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises a mixture of trimesoyl chloride and isophthaloyl chloride.
Claim 14
Dependent Claim
113 words
A process for the preparation of a chlorine-resistant semipermeable membrane which comprises casting a solution of a triaryl triamine on a porous support backing material, removing excess solution, contacting said coated support material with an organic solvent solution of an aromatic polycarboxylic acid chloride to form an interfacial condensation reaction product membrane on the surface of said porous support backing material, removing excess solution, curing the resultant composite at curing conditions, and removing the resultant chlorine-resistant semipermeable membrane, said triaryl triamine being selected from the group consisting of 2,3-bis(p-aminobenzyl) aniline, 2,4-bis(p-aminobenzyl) aniline, 2,5-bis(p-aminobenzyl) aniline, 2,6-bis(p-aminobenzyl) aniline, 2,3-bis(o-aminobenzyl) aniline, 2,4-bis(o-aminobenzyl) aniline, 2,5-bis(o-aminobenzyl) aniline, 2,6-bis(o-aminobenzyl) aniline, 2,3-bis(m-aminobenzyl) aniline, 2,4-bis(m-aminobenzyl) aniline, 2,5-bis(m-aminobenzyl) aniline, and 2,6-bis(m-aminobenzyl) aniline.
Claim 15
Dependent Claim
113 words
A process for the preparation of a chlorine-resistant semipermeable membrane which comprises casting a solution of a triaryl triamine on a porous support backing material, removing excess solution, contacting said coated support material with an organic solvent solution of an aromatic polycarboxylic acid chloride to form an interfacial condensation reaction product membrane on the surface of said porous support backing material, removing excess solution, curing the resultant composite at curing conditions, and removing the resultant chlorine-resistant semipermeable membrane, said triaryl triamine being selected from the group consisting of 2,3-bis(p-aminobenzyl) aniline, 2,4-bis(p-aminobenzyl) aniline, 2,5-bis(p-aminobenzyl) aniline, 2,6-bis(p-aminobenzyl) aniline, 2,3-bis(o-aminobenzyl) aniline, 2,4-bis(o-aminobenzyl) aniline, 2,5-bis(o-aminobenzyl) aniline, 2,6-bis(o-aminobenzyl) aniline, 2,3-bis(m-aminobenzyl) aniline, 2,4-bis(m-aminobenzyl) aniline, 2,5-bis(m-aminobenzyl) aniline, and 2,6-bis(m-aminobenzyl) aniline.
Claim 16
Dependent Claim
44 words
The process as set forth in claim 13 in which said curing conditions include a temperature in the range of from about 25° to about 150° C. for a period of time in the range of from about 1 minute to about 2 hours.
Claim 17
Dependent Claim
29 words
The process as set forth in claim 13 in which said solution of said triaryl triamine is an aqueous solution which may include an ionic or a nonionic surfactant.
Claim 18
Dependent Claim
30 words
The process as set forth in claim 13 in which said solution of triaryl triamine is an aqueous solution which may include an organic solvent which is miscible with water.
Claim 19
Dependent Claim
17 words
The process as set forth in claim 13 in which said porous support backing material comprises polysulfone.
Claim 20
Dependent Claim
17 words
The process as set forth in claim 13 in which said porous support backing material comprises polycarbonate.
Claim 21
Dependent Claim
18 words
The process as set forth in claim 13 in which said porous support backing material comprises polyphenyl ether.
Claim 22
Dependent Claim
17 words
The process as set forth in claim 13 in which said porous support backing material comprises polyamide.
Claim 23
Dependent Claim
25 words
The process as set forth in claim 13 in which said triaryl triamine comprises 2,4-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 24
Dependent Claim
25 words
The process as set forth in claim 13 in which said triaryl triamine comprises 2,6-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 25
Dependent Claim
25 words
The process as set forth in claim 13 in which said triaryl triamine comprises 2,3-bis(m-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises isophthaloyl chloride.
Claim 26
Dependent Claim
25 words
The process as set forth in claim 13 in which said triaryl triamine comprises 2,5-bis(o-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises terephthaloyl chloride.
Claim 27
Dependent Claim
31 words
The process as set forth in claim 13 in which said triaryl triamine comprises 2,4-bis(p-aminobenzyl) aniline and said aromatic polycarboxylic acid chloride comprises a mixture of trimesoyl chloride and isophthaloyl chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |