US3839237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange resins having both acidic and basic ion-exchange sites
Assignee: Orica Ltd
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Filing: 1973-05-21
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Granted: 1974-10-01
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Expires: 1993-05-21
Abstract
Abstract Process for manufacturing an amphoteric polymeric composition wherein a mixture of monomers comprising (i) a monomer selected from the group consisting of acrylamide, methacrylamide, and lower alkyl esters of acrylic and methacrylic acid, and mixtures thereof, and (ii) a monomer selected from the group consisting of a strong mineral acid salt of triallylamine, 1,4-bis (N,Ndiallyl-aminomethyl)benzene, 2,4,6-N,Ndiallylaminomethyl)toluene, 1,6-bis (N,N-diallylamino)hexane, methyldiallylamine and ethyldiallylamine, and mixtures thereof, is polymerized in the presence of a free radical initiator, wherein the mixture of monomers is dissolved in a polar nonaqueous solvent system, and the resulting polymeric composition is subsequently hydrolyzed.
Inventors
- 👤 H Battaerd
- 👤 B Bolto
- 👤 P Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:30
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/02; B; B01; B01J; B01J43/00; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A PROCESS OF MANUFACTURING AN AMPHOTERIC POLYMERIC COMPOSITION WHICH COMPRISES THE STEPS OF: A. POLYMERISING THE PRESENCE OF FREE RADICAL INITIATOR A MIXTURE OF MONOMERS COMPRISING I. AN ACIDIC MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE, METHACRYLAMIDE, AND LOWER ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACID, AND MIXTURES THEREOF, WHERE THE LOWER ALKYL GROUP OF THE ALCOHOL PORTION OF THE ESTER CONTANS FROM 1 TO 6 CARBON ATOMS; AND II. A BASIC MONOMER SELECTED FROM THE GROUP CONSISTING OF A STRONG MINERAL ACID SALT OF TRIALLYLAMINE, 1,4-BIS(N,NDIALLYLAMINOMETHYL)BBENZENE, 2,4,6-TRIS(N,N-DIALLYLAMINOMETHYL)TOLUENE, 1,6-BIS(N,N-DIALLYLAMINO) HEXANE, METHYLDIALLYLAMINE, AND ETHYLDIALLYLAMINE, AND MIXTURES THEREOF; WHEREIN THE MIXTURE OF MONOMERS IS DISSOLVED IN A POLAR, NON-AQUEOUS SOLVENT SYSTEM, AND B. DISUBSEQUENTLY HYDROLYZING THE POLYMERIC COMPOSITION OBTAINED IN (A) TO FORM AN AMPHOTERIC POLYMERIC COMPOSITION HAVING THERMALLY REGENERABLE ION-EXCHANGE CAPACITY.
Claim 2
Dependent Claim
131 words
A PROCESS OF MANUFACTURING AN AMPHOTERIC POLYMERIC COMPOSITION WHICH COMPRISES THE STEPS OF: A. POLYMERISING THE PRESENCE OF FREE RADICAL INITIATOR A MIXTURE OF MONOMERS COMPRISING I. AN ACIDIC MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE, METHACRYLAMIDE, AND LOWER ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACID, AND MIXTURES THEREOF, WHERE THE LOWER ALKYL GROUP OF THE ALCOHOL PORTION OF THE ESTER CONTANS FROM 1 TO 6 CARBON ATOMS; AND II. A BASIC MONOMER SELECTED FROM THE GROUP CONSISTING OF A STRONG MINERAL ACID SALT OF TRIALLYLAMINE, 1,4-BIS(N,NDIALLYLAMINOMETHYL)BBENZENE, 2,4,6-TRIS(N,N-DIALLYLAMINOMETHYL)TOLUENE, 1,6-BIS(N,N-DIALLYLAMINO) HEXANE, METHYLDIALLYLAMINE, AND ETHYLDIALLYLAMINE, AND MIXTURES THEREOF; WHEREIN THE MIXTURE OF MONOMERS IS DISSOLVED IN A POLAR, NON-AQUEOUS SOLVENT SYSTEM, AND B. DISUBSEQUENTLY HYDROLYZING THE POLYMERIC COMPOSITION OBTAINED IN (A) TO FORM AN AMPHOTERIC POLYMERIC COMPOSITION HAVING THERMALLY REGENERABLE ION-EXCHANGE CAPACITY.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the solution of the monomers in the polar solvent in (a) is dispersed in a second liquid phase.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein the second liquid phase is an immiscible non-polar organic solvent.
Claim 5
Dependent Claim
30 words
A process according to claim 1 wherein the nonaqueous solvent system comprises acetone, acetonitrile, dimethylsulphoxide, dimethylformamide, methyl ethyl ketone or lower alkyl alcohol of from one to six carbon atoms.
Claim 6
Dependent Claim
54 words
A process according to claim 3 wherein the polar organic solvent is chosen from the group consisting of acetone, acetonitrile, dimethylsulphoxide, dimethylformamide, ethylmethylketone and lower alkyl alcohol containing from one to siX carbon atoms, and the non-polar solvent is chosen from the group consisting of petroleum ether, paraffin oil, aromatic hydrocarbons and chlorinated hydrocarbons.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the monomer mixture contains a third monomer component which is non-charged.
Claim 8
Dependent Claim
14 words
A process according to claim 6 wherein the third monomer is a cross-linking agent.
Claim 9
Dependent Claim
32 words
A process according to claim 7 wherein the cross-linking agent is chosen from the group consisting of ethylene glycol dimethyacrylate, 1,3-butylene glycol dimethacrylate, divinylbenzene, triallyl cyanurate and the triallyl ether of pentaerythritol.
Claim 10
Dependent Claim
25 words
A process according to claim 7 wherein the crosslinking agent is present in an amount from 10 to 30 percent w/w of the polymeric composition.
Claim 11
Dependent Claim
24 words
A process according to claim 7 wherein the third monomer is chosen from the group consisting of vinyl acetate, methyl vinyl ether and styrene.
Claim 12
Dependent Claim
27 words
A process according to claim 10 wherein the proportion of the third monomer lies in the range from 5 - 50 percent w/w of the polymeric composition.
Claim 13
Dependent Claim
28 words
A process according to claim 1 wherein the molar ratio of basic monomer to acidic monomer is in the range from 20 : 80 to 60 : 40.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |