US4101461A
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Method for preparation of anion exchangers by substitution of hydrophilic polymeric gels
Assignee: Czech Academy of Sciences
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Filing: 1975-02-07
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Granted: 1978-07-18
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Expires: 1995-02-07
Abstract
Abstract The invention relates to a method for preparation of hydrophilic anion exchangers from gels based on crosslinked copolymers of hydroxyalkyl acrylates and methacrylates, oligo- and polyglycol monoacrylates and monomethacrylates, hydroxyalkylacrylamides or hydroxyalkylmethacrylamides with crosslinking comonomers containing 2 or more acrylcyl or methacryloyl groups in the molecule, as alkylene, oligo- and polyglycol diacrylates and dimethacrylates or divinylbenzene, which gels may have the homogeneous, heterogeneous or macroporous character. The hydroxyl groups of the initial hydrophilic gel are modified by the reaction with halogenoalkylamines, halogenoalkylammonium compounds, epoxyalkylamines and epoxyalkylammonium compounds or with compounds having several reactive groups in the molecule, as epichlorohydrine, di- and polyepoxides, di- and polyisocyanates, halogenoalkylepoxides, epoxyalkylamines and phosgene, and the subsequent reaction with compounds rendering anion-exchanging groups, as hydroxyalkylamines, diamines and their ammonium compounds. The later procedure may be carried out in one step. The hydroxyl groups of the initial gel can be also substituted by halogens and transformed into quaternary ammonium compounds by reaction with amines. All reactions may be performed also with gels combining alkoxide instead of hydroxyl groups.
Inventors
- 👤 Petr Strop
- 👤 Jiri Coupek
- 👤 Otakar Mikes
- 👤 Jiri Hradil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
Method for the preparation of hydrophilic anion exchangers from polymeric gels containing hydroxyl groups in their structure wherein a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers is modified by reaction of said copolymer with an amino compound selected from the group consisting of halogenoalkylamines, halogenoalkylamonium compounds, epoxyalkylamines and epoxyalkylammonium compounds, said reaction being effected after activation of said copolymer by treatment thereof under basic conditions.
Claim 2
Dependent Claim
70 words
Method for the preparation of hydrophilic anion exchangers from polymeric gels containing hydroxyl groups in their structure wherein a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers is modified by reaction of said copolymer with an amino compound selected from the group consisting of halogenoalkylamines, halogenoalkylamonium compounds, epoxyalkylamines and epoxyalkylammonium compounds, said reaction being effected after activation of said copolymer by treatment thereof under basic conditions.
Claim 3
Dependent Claim
73 words
Method as set forth in claim 1, wherein two polymeric gels are prepared by a suspension copolymerization of monomers selected from a group comprising hydroxyalkyl methacrylates, hydroxyalkyl acrylates, oligo- and polyglycol methacrylates, oligo- and polyglycol acrylates, hydroxyalkylacrylamides and hydroxyalkylmethacrylamides with crosslinking mononomers which contain two or more acryloyl or methacryloyl groups in the molecule and are selected from a group comprising di- and polyacrylates and methacrylates, glycol acrylates, glycol methacrylates or with divinylbenzane.
Claim 4
Dependent Claim
17 words
Method as set forth in claim 1, wherein the copolymers have the homogeneous, heterogeneous or macroperous structure.
Claim 5
Dependent Claim
40 words
The method of claim 1 in which the reaction of said copolymer with said amino compound is effected by holding the reactants at 30°-110° C. for periods ranging from 24 hours at 30° C. to 0.5 hour at 110° C.
Claim 6
Dependent Claim
16 words
The method of claim 4 in which said copolymer is initially swollen in said amino compound.
Claim 7
Dependent Claim
32 words
The method of claim 4 in which said copolymer is reacted directly with one of said ammonium compounds selected from the group of said amino compounds in the presence of aqueous caustic.
Claim 8
Dependent Claim
12 words
Hydrophilic anion exchangers formed in accordance with the method of claim 1.
Claim 9
Dependent Claim
60 words
Hydrophilic anion exchangers formed from polymeric gels containing hydroxyl groups in their structure by reacting a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers with an amino compound selected from the group consisting of halogenoalkylamines, halogenoalkylammonium compounds, epoxyalkylamines and epoxyalkylammonium compounds, the reaction being effected after activation of said copolymer by treatment thereof under basic conditions.
Claim 10
Dependent Claim
60 words
Hydrophilic anion exchangers formed from polymeric gels containing hydroxyl groups in their structure by reacting a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers with an amino compound selected from the group consisting of halogenoalkylamines, halogenoalkylammonium compounds, epoxyalkylamines and epoxyalkylammonium compounds, the reaction being effected after activation of said copolymer by treatment thereof under basic conditions.
Claim 11
Dependent Claim
91 words
Method for the preparation of hydrophilic anion exchangers from polymeric gels containing hydroxyl groups in their structure wherein a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacryalmide monomers is modified by reaction of said copolymer with a reactive group containing compound selected from the group consisting of epichlorohydrin, di- and polyepoxides, halogenoalkylepoxides, epoxyalkylamines and phosgene and the subsequent or simultaneous reaction with a nitrogen-containing compound selected from the group consisting of hydroxyalkylamines, diamines and their ammonium compounds, said copolymer being initially activated by treatment thereof under basic conditions.
Claim 12
Dependent Claim
91 words
Method for the preparation of hydrophilic anion exchangers from polymeric gels containing hydroxyl groups in their structure wherein a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacryalmide monomers is modified by reaction of said copolymer with a reactive group containing compound selected from the group consisting of epichlorohydrin, di- and polyepoxides, halogenoalkylepoxides, epoxyalkylamines and phosgene and the subsequent or simultaneous reaction with a nitrogen-containing compound selected from the group consisting of hydroxyalkylamines, diamines and their ammonium compounds, said copolymer being initially activated by treatment thereof under basic conditions.
Claim 13
Dependent Claim
36 words
The method of claim 9 in which the reaction of said copolymer is first effected with said reactive group containing compound by holding the reactants at 45°-130° C. for periods ranging from 3.25 to 7 hours.
Claim 14
Dependent Claim
32 words
The method of claim 10 in which the product thereof is subsequently reacted with said nitrogen-containing compound by holding the reactants at 90°-140° C. for periods ranging from 4 to 28 hours.
Claim 15
Dependent Claim
32 words
The method of claim 9 in which the reaction of said copolymer is effected simultaneously with said reactive group containing compound and said nitrogen-containing compound by holding the reactants at 60°-90° C.
Claim 16
Dependent Claim
15 words
The method of claim 4 in which said copolymer is initially swollen in aqueous caustic.
Claim 17
Dependent Claim
19 words
The method of claim 10 in which said copolymer is initially swollen in a mixture of water and N,N-dimethylformamide.
Claim 18
Dependent Claim
15 words
The method of claim 12 in which said copolymer is initially swollen in aqueous caustic.
Claim 19
Dependent Claim
81 words
Hydrophilic anion exchangers formed from polymeric gels containing hydroxyl groups in their structure by reacting a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers with a reactive group containing compound selected from the group consisting of epichlorohydrin, di- and polyepoxides, halogenoalkylepoxides, epoxyalkylamines and phosgene and the subsequent or simultaneous reaction with a nitrogen-containing compound selected from the group consisting of hydroxyalkylamines, diamines and their ammonium compounds, said copolymer being initially activated by treatment thereof under basic conditions.
Claim 20
Dependent Claim
81 words
Hydrophilic anion exchangers formed from polymeric gels containing hydroxyl groups in their structure by reacting a crosslinked copolymer of hydroxyl group containing acrylate, methacrylate, acrylamide and methacrylamide monomers with a reactive group containing compound selected from the group consisting of epichlorohydrin, di- and polyepoxides, halogenoalkylepoxides, epoxyalkylamines and phosgene and the subsequent or simultaneous reaction with a nitrogen-containing compound selected from the group consisting of hydroxyalkylamines, diamines and their ammonium compounds, said copolymer being initially activated by treatment thereof under basic conditions.
Claim 21
Dependent Claim
12 words
Hydrophilic anion exchangers formed in accordance with the method of claim 9.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |