US4885091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of chlorine-resistant semipermeable membranes
Assignee: Honeywell International Inc
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Filing: 1988-06-01
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Granted: 1989-12-05
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Expires: 2008-06-01
Abstract
Abstract Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composited on a porous support backing material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring such as 5-chlor-m-phenylenediamine. The coated support material is then contacted with an organic solvent solution of aromatic polycarboxylic acid chloride such as trimesoyl chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant semipermeable membrane is then cured at curing conditions to form the desired composite. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane being resistant to attack by chlorine which is present in the water.
Inventors
- 👤 Raymond J. Swedo
- 👤 Joseph J. Zupancic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:28
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; B; B01; B01D; B01D69/00; B01D69/12; B01D69/125; B01D69/1251; B01D71/00; B01D71/06; B01D71/56; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
135 words
A process for the preparation of a chlorine-resistant semipermeable membrane which comprises providing resistance to chlorine in desalination of saline water by casting a solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring selected from the group consisting of 4-chloro-m-phenylenediamine, 5-chloro-m-phenylenediamine and mixtures thereof 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 backing material, curing the resultant composite at curing conditions which 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 10 minutes to about 2 hours, and recovering the resultant chlorine-resistant semipermeable membrane.
Claim 2
Dependent Claim
135 words
A process for the preparation of a chlorine-resistant semipermeable membrane which comprises providing resistance to chlorine in desalination of saline water by casting a solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring selected from the group consisting of 4-chloro-m-phenylenediamine, 5-chloro-m-phenylenediamine and mixtures thereof 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 backing material, curing the resultant composite at curing conditions which 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 10 minutes to about 2 hours, and recovering the resultant chlorine-resistant semipermeable membrane.
Claim 3
Dependent Claim
23 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring is 4-chloro-m-phenylenediamine.
Claim 4
Dependent Claim
23 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring is 5-chloro-m-phenylenediamine.
Claim 5
Dependent Claim
28 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises a mixture of 4-chloro-m-phenylenediamine and 5-chloro-m-phenylenediamine.
Claim 6
Dependent Claim
31 words
The process 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 mixtures thereof.
Claim 7
Dependent Claim
50 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring is present in said interfacial polymerized condensation reaction product in a weight ratio to said aromatic polycarboxylic acid chloride in a range of from about 0.1:1 to about 40:1.
Claim 8
Dependent Claim
17 words
The process as set forth in claim 1 in which said porous support backing material comprises polysulfone.
Claim 9
Dependent Claim
17 words
The process as set forth in claim 1 in which said porous support backing material comprises polycarbonate.
Claim 10
Dependent Claim
18 words
The process as set forth in claim 1 in which said porous support backing material comprises polyphenylene ether.
Claim 11
Dependent Claim
17 words
The process as set forth in claim 1 in which said porous support backing material comprises polyamide.
Claim 12
Dependent Claim
33 words
The process as set forth in claim 1 in which said aqueous solution of said aromatic polyamine containing a chlorine substituent on the aromatic ring may include an ionic or a nonionic surfactant.
Claim 13
Dependent Claim
35 words
The process as set forth in claim 1 in which said aqueous solution of said aromatic polyamine containing a chlorine substituent on the aromatic ring may contain an organic solvent which is miscible with water.
Claim 14
Dependent Claim
19 words
The process as set forth in claim 1 in which said organic solvent is immiscible with said aqueous solution.
Claim 15
Dependent Claim
32 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 4-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 16
Dependent Claim
32 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 5-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 17
Dependent Claim
32 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 5-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises isophthaloyl chloride.
Claim 18
Dependent Claim
32 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 4-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises terephthaloyl chloride.
Claim 19
Dependent Claim
43 words
The process as set forth in claim 1 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises a mixture of 4-chloro-m-phenylenediamine and 5-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises a mixture of trimesoyl chloride and isophthaloyl chloride.
Claim 20
Dependent Claim
93 words
A process for the desalination of a saline water feedstream which comprises contacting said feedstream with the upstream face of a chlorine-resistant semipermeable membrane comprising a porous support backing material having supported thereon an interfacial polymerized condensation reaction product formed by the process of reacting together an aromatic polyamine containing a chlorine substituent on the aromatic ring selected from the group consisting of 4-chloro-m-phenylenediamine, 5-chloro-m-phenylenediamine, and mixtures thereof and an aromatic polycarboxylic acid chloride at separation conditions and recovering the permeate comprising the resultant desalinated water downstream subsequent to passage through said membrane.
Claim 21
Dependent Claim
93 words
A process for the desalination of a saline water feedstream which comprises contacting said feedstream with the upstream face of a chlorine-resistant semipermeable membrane comprising a porous support backing material having supported thereon an interfacial polymerized condensation reaction product formed by the process of reacting together an aromatic polyamine containing a chlorine substituent on the aromatic ring selected from the group consisting of 4-chloro-m-phenylenediamine, 5-chloro-m-phenylenediamine, and mixtures thereof and an aromatic polycarboxylic acid chloride at separation conditions and recovering the permeate comprising the resultant desalinated water downstream subsequent to passage through said membrane.
Claim 22
Dependent Claim
21 words
The process as set forth in claim 19 further characterized in that said saline water feedstream contains an added chlorine-containing compound.
Claim 23
Dependent Claim
15 words
The process as set forth in claim 20 in which said chlorine-containing compound comprises chloroamines.
Claim 24
Dependent Claim
16 words
The process as set forth in claim 20 in which said chlorine-containing compound comprises chlorine dioxide.
Claim 25
Dependent Claim
15 words
The process as set forth in claim 20 in which said chlorine-containing compound comprises hypochloride.
Claim 26
Dependent Claim
45 words
The process as set forth in claim 19 in which said separation conditions include a temperature in the range of from about ambient to about 50° C. and a pressure in the range of from about 1,380 kPa (200 psi) to about 6,895 kPa(1,000 psi).
Claim 27
Dependent Claim
50 words
The process as set forth in claim 19 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring is present in said interfacially polymerized condensation reaction product in a weight ratio to said aromatic polycarboxylic acid chloride in a range of from about 0.1:1 to about 40:1.
Claim 28
Dependent Claim
32 words
The process as set forth in claim 19 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 4-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 29
Dependent Claim
32 words
The process as set forth in claim 19 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises 5-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 30
Dependent Claim
37 words
The process as set forth in claim 19 in which said aromatic polyamine containing a chlorine substituent on the aromatic ring comprises a mixture of 4-chloro-m-phenylenediamine and 5-chloro-m-phenylenediamine and said aromatic polycarboxylic acid chloride comprises trimesoyl chloride.
Claim 31
Dependent Claim
17 words
The process as set forth in claim 19 in which said porous support backing material comprises polysulfone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |