US3891576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process
Assignee: Orica Ltd
•
Filing: 1973-05-14
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Granted: 1975-06-24
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Expires: 1993-05-14
Abstract
Abstract A process of manufacturing a polymeric composition of ionexchange resins possessing amphoteric characteristics. The compositions are produced by reacting in the presence of a free radical initiator a heterogeneous mixture comprising an aqueous solution of an allylamine salt containing more than one allyl substituent of a strong acid and a compound selected from the group consisting of ethylenically unsaturated acids and organic derivatives of ethylenically unsaturated acids. The mixture is further characterized in that a major proportion of the noted compound is present in a separate phase finely dispersed in the aqueous solution. The amphoteric ion-exchange resins so produced find utility in the purification of biological media and polymers, and pharmaceuticals, for example, penicillin, cosmetics, slow release medicines and water demineralization processes.
Inventors
- 👤 Hendrik Adrian Jacobu Battaerd
- 👤 Brian Alfred Bolto
- 👤 Pir Ghulam Samadani Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:35
CPC Classifications
B; B01; B01J; B01J43/00; C; C08; C08F; C08F220/00; C08F222/00; C08F226/00; C08F226/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A PROCESS OF MANUFACTURING A POLYMERIC COMPOSITION WHICH PROCESS COMPRISES REACTING IN THE PRESENCE OF A FREE RADICAL INITIATOR A HETEROGENEOUS MIXTURE COMPRISING AN AQUEOUS SOLUTION OF AN ALLYLAMINE SALT CONTAINING MORE THAN ONE ALLYL SUBSTITUENT OF A STRONG ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED ACIDS AND ORGANIC DERIVATIVES OF ETHYLENICALLY UNSATURATED ACIDS SAID MIXTURE BEING CHARACTERIZED IN THAT IN MAJOR PROPORTION OF THE SAID COMPOUND IS PRESENT IN A SEPARATE PHASE FINELY DISPERSED IN THE AQUEOUS SOLUTION.
Claim 2
Dependent Claim
84 words
A PROCESS OF MANUFACTURING A POLYMERIC COMPOSITION WHICH PROCESS COMPRISES REACTING IN THE PRESENCE OF A FREE RADICAL INITIATOR A HETEROGENEOUS MIXTURE COMPRISING AN AQUEOUS SOLUTION OF AN ALLYLAMINE SALT CONTAINING MORE THAN ONE ALLYL SUBSTITUENT OF A STRONG ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED ACIDS AND ORGANIC DERIVATIVES OF ETHYLENICALLY UNSATURATED ACIDS SAID MIXTURE BEING CHARACTERIZED IN THAT IN MAJOR PROPORTION OF THE SAID COMPOUND IS PRESENT IN A SEPARATE PHASE FINELY DISPERSED IN THE AQUEOUS SOLUTION.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the allylamine is chosen from the group consisting of triallylamine, methyldiallylamine, ethyldiallylamine, bisdiallylaminomethyl-1,4-benzene, bisdiallylamino-1,6-hexane and mixtures thereof.
Claim 4
Dependent Claim
21 words
A process according to claim 1 wherein the derivative of an ethylenically unsaturated acid is an aryl amide of maleic acid.
Claim 5
Dependent Claim
18 words
A process according to claim 3 wherein the aryl amide of maleic acid is N phenyl maleamic acid.
Claim 6
Dependent Claim
24 words
A process according to claim 1 wherein the derivative of an ethylenically unsaturated acid is a heavy metal salt of acrylic or methacrylic acids.
Claim 7
Dependent Claim
27 words
A process according to claim 1 wherein the separate phase is dispersed in the aqueous solution as particles in the size range from 0.5 to 5 microns.
Claim 8
Dependent Claim
15 words
A process according to claim 1 wherein the reaction is initiated with high energy radiation.
Claim 9
Dependent Claim
17 words
A process according to claim 1 wherein the reaction is initiated with a chemical free radical generator.
Claim 10
Dependent Claim
27 words
A process according to claim 1 wherein the heterogeneous mixture is dispersed in a liquid immiscible with the aqueous solvent used to make up the heterogeneous mixture.
Claim 11
Dependent Claim
21 words
A process according to claim 9 wherein the liquid immiscible with the aqueous solvent is an aromatic solvent or petroleum ether.
References Cited (Backward Citations)
US3032538A
Cited
US3619394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |