US4087391A
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Ion-exchanger alkylsulphonated phenoxy polymers for membranes
Assignee: Rhone Poulenc Industries SA
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Filing: 1976-10-08
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Granted: 1978-05-02
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Expires: 1996-10-08
Abstract
Abstract A polymer is disclosed having ion exchange properties, and characterized by the presence of units of the formula: ##STR1## optionally associated with units of the formula: ##STR2## in which: R 1 and R 2 , which may be identical or different, represent a hydrogen atom or a methyl radical; E represents a divalent radical consisting of the nucleus system of a polynuclear diphenol in which the hydroxyl group are attached to different nuclei; x and n are positive integers; and M n+ represents a cation of valency n.
Inventors
- 👤 Jean-Pierre Quentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:34
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/461; C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2256; C08J2371/00; C08J2371/08; C08J2371/10; C08J2371/12; Y; Y10; Y10S; Y10S525/00; Y10S525/93
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
121 words
A polymer having ion exchange properties containing units of the formula: ##STR21## alone or in combination with units selected from the class consisting of units of the formula; ##STR22## and units of the formula: ##STR23## in which: R 1 and R 2 , which may be identical or different, represent a hydrogen atom or a methyl radical; R 4 represents a radical such as --O-- or --O--R 5 --O; R 5 represents an organic radical of valency at least equal to 2; E represents a divalent radical consisting of the nucleus system of a polynuclear diphenol in which the hydroxyl groups are attached to different nuclei; x and n are positive integers; and M n+ represents a cation of valency n.
Claim 2
Dependent Claim
121 words
A polymer having ion exchange properties containing units of the formula: ##STR21## alone or in combination with units selected from the class consisting of units of the formula; ##STR22## and units of the formula: ##STR23## in which: R 1 and R 2 , which may be identical or different, represent a hydrogen atom or a methyl radical; R 4 represents a radical such as --O-- or --O--R 5 --O; R 5 represents an organic radical of valency at least equal to 2; E represents a divalent radical consisting of the nucleus system of a polynuclear diphenol in which the hydroxyl groups are attached to different nuclei; x and n are positive integers; and M n+ represents a cation of valency n.
Claim 3
Dependent Claim
33 words
A polymer according to claim 1, in which the units of formula (I) are present in the polymer to the extent of from 0.5 to 3 milliequivalents per gram (meq/g) of dry resin.
Claim 4
Dependent Claim
33 words
A polymer according to claim 1, in which the units of formula (I) are present in the polymer to the extent of from 1 to 1.5 milliequivalents per gram (meq/g) of dry resin.
Claim 5
Dependent Claim
104 words
A polymer according to claim 1, in which E has the formula: ##STR24## in which Y and Y 1 are alkyl or alkoxy radicals having from 1 to 4 carbon atoms, or halogen atoms; R 3 represents --CO--, --SO 2 --, --O--, or --S--, or an alkylene or alkylidene radical having from 1 to 3 carbon atoms; m and z may be equal to 0, 1, 2 or 3; M n+ represents H + or Na + , K + , Li + , Mg ++ , Ba ++ , NH 4 + or another ammonium cation; and x is between 2 and 5.
Claim 6
Dependent Claim
62 words
A polymer according to claim 5, in which --R 5 -- represents a --CH 2 --CHOH--R 6 --CHOH--CH 2 radical in which R 6 represents an aliphatic or aromatic or cycloaliphatic divalent radical or a mixed divalent radical of which the carbon chain contains from 2 to 100 carbon atoms and is optionally interrupted by functional groups, such as an oxygen atom.
Claim 7
Dependent Claim
30 words
A polymer according to claim 1, which is in the form of a membrane such as an ion exchange membrane, a composite membrane, a screen-reinforced membrane, or an anisotropic membrane.
Claim 8
Dependent Claim
38 words
A process for the preparation of a polymer according to claim 1, in which a sultone or a halogenoalkylsulphonic acid salt is reacted with a polymer consisting of units of the formula (II) as defined in claim 1.
Claim 9
Dependent Claim
29 words
A process according to claim 7, in which the reduced viscosity of the phenoxy resin polymer with units of formula (II) is between 15 and 120 cm 3 /g.
Claim 10
Dependent Claim
51 words
A process according to claim 7, in which the sultone has the formula ##STR25## x being an integer equal to or greater than 2, and in that the halogenoalkylsulphonic acid has the formula X--(CH 2 ) x --SO 3 H, X being a halogen atom and x being a positive integer.
Claim 11
Dependent Claim
13 words
A process according to claim 9, wherein the halogen is chlorine or bromine.
Claim 12
Dependent Claim
33 words
A process according to claim 7, in which the alkylsulphonating agent is selected from the class consisting of propane-sultone, butane-sultone, pentane-sultone, and the salts of chloromethylsulphonic, bromomethylsulphonic, 2-chloroethylsulphonic, 2-bromoethylsulphonic, 3-chloropropylsulphonic and 3-bromopropylsulphonic acid.
Claim 13
Dependent Claim
67 words
A process according to claim 7, in which the temperature is less then 100° C, the concentration of polymer in the reaction mixture is between 0.5 and 20% by weight, and the alkylsulphonating agent is used in such an amount that the ratio of the number of mols of alkylsulphonating agent/units of the formula (II) present in the reactive copolymer starting material is between 0.05 and 5.
Claim 14
Dependent Claim
35 words
A process according to claim 12, wherein the temperature is between 30° and 70° C, the polymer concentration is between 1.5 and 5% by weight, alkylsulphonating agent/formula (II) units ratio is between 0.2 and 2.
Claim 15
Dependent Claim
25 words
A process according to claim 7, which is carried out in a solvent for the phenoxy resin and in the presence of a strong base.
Claim 16
Dependent Claim
31 words
A process according to claim 14, in which the solvent is an aprotic polar solvent and that the strong base is an alkali metal derivative of a compound having mobile hydrogen.
Claim 17
Dependent Claim
29 words
A process for the treatment of a membrane based on alkylsulphonated phenoxy resins according to claim 6, in which it is immersed in an acid solution containing ceric ions.
Claim 18
Dependent Claim
23 words
A process according to claim 16, in which the concentration of ceric ions in the solution is between 0.1 and 50 milligram ions/l.
Claim 19
Dependent Claim
18 words
A process according to claim 17, wherein the ceric ion concentration is between 2 and 20 milligram ions/l.
Claim 20
Dependent Claim
18 words
A process according to claim 16, in which the ceric ions are in the form of a salts.
Claim 21
Dependent Claim
14 words
A process according to claim 19, wherein the salt is a nitrate or sulphate.
Claim 22
Dependent Claim
16 words
A process according to claim 16, wherein the treatment solution contains nitric acid or sulphuric acid.
Claim 23
Dependent Claim
20 words
A process according to claim 16, in which the acid concentration of the solution is between 5 and 300 millimols/l.
Claim 24
Dependent Claim
12 words
A process according to claim 16, in which the membrane is screen-reinforced.
Claim 25
Dependent Claim
91 words
A process according to claim 16, in which the active polymer of the membrane contains units of the formula: ##STR26## alone or in combination with units of the formula: ##STR27## in which: R 1 and R 2 , which may be identical or different, represent a hydrogen atom or a methyl radical; E represents a divalent radical consisting of the nucleus system of a polynuclear diphenol in which the hydroxyl groups are attached to different nuclei; x and n are positive integers; and M n+ represents a cation of valency n.
Claim 26
Dependent Claim
17 words
A process according to claim 16, in which the polymer is crosslinked by means of a diepoxide.
Claim 27
Dependent Claim
105 words
A membrane which may be used especially in electrolysis cells and in reverse osmosis, which is obtained by a process according to claim 7, the membrane polymer containing from 0.5 to 3 milliequivalents per gram of dry resin of units of formula (I): ##STR28## in which: R 1 and R 2 , which may be identical or different, represent a hydrogen atom or a methyl radical; E represents a divalent radical consisting of the nucleus system of a polynuclear diphenol in which the hydroxyl groups are attached to different nuclei; x and n are positive integers; and M n+ represents a cation of valency n.
Claim 28
Dependent Claim
30 words
A separator diaphragm for electrolysis cells comprising a membrane as defined in claim 6 containing from 0.5 to 3 milliequivalents per gram of dry resin of units of formula (I).
Claim 29
Dependent Claim
28 words
A reverse osmosis device having a membrane as defined in claim 6 containing from 0.5 to 3 milliequivalents per gram of dry resin of units of formula (I).
Claim 30
Dependent Claim
52 words
A polymer according to claim 1 in which R 5 represents ##STR29## --(CH 2 ) p --, --CH 2 --CHOH--R 6 --CHOH--CH 2 -- or --CH 2 --CHOH--R 6 --CH 2 --, R 6 being a valency bond or ##STR30## ##STR31## or --(CH 2 ) p , p being less than 10.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |