Patent US4266045A successfully refreshed from Google Patents.
US4266045A
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Etherified phenolic chelate resin, process for its production, and method for adsorption treatment
Assignee: Unitika Ltd
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Filing: 1978-09-11
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Granted: 1981-05-05
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Expires: 1998-09-11
Abstract
Abstract An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into ether groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.
Inventors
- 👤 Hiroyuki Uejima
- 👤 Masahide Hirai
- 👤 Tsutomu Sakaida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:21
CPC Classifications
B; B01; B01J; B01J45/00; C; C02; C02F; C02F1/00; C02F1/28; C02F1/285; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G14/12; C08G8/00; C08G8/28; C08G8/36; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
29 words
An etherified phenolic chelate resin comprising the product obtained on etherification of some or all of the phenolic hydroxyl groups of a phenolic chelate resin with an etherification agent.
Claim 2
Dependent Claim
29 words
An etherified phenolic chelate resin comprising the product obtained on etherification of some or all of the phenolic hydroxyl groups of a phenolic chelate resin with an etherification agent.
Claim 3
Dependent Claim
15 words
The resin of claim 1, wherein the degree of etherification is about 20 to 100%.
Claim 4
Dependent Claim
41 words
The resin of claim 1, wherein the chelate group of the phenolic chelate resin is selected from the group consisting of a polyalkylene polyamine group, an iminodi-aliphatic carboxylic acid group, an aminocarboxylic acid group, an alcoholamine group, and a urea group.
Claim 5
Dependent Claim
23 words
The resin of claim 1, wherein the etherification agent is selected from the group consisting of haloacetic acids, halohydrins, alkyl halides and dialkylsulfates.
Claim 6
Dependent Claim
27 words
The resin of claim 1, wherein the etherification agent is a haloacetic acid, and the chelate group of the phenolic chelate resin is an aminocarboxylic acid group.
Claim 7
Dependent Claim
28 words
The resin of claim 1, wherein the etherification agent is a haloacetic acid, and the chelate group of the phenolic chelate resin is an iminodi-aliphatic carboxylic acid group.
Claim 8
Dependent Claim
26 words
The resin of claim 1, wherein the etherification agent is a halohydrin, and the chelate group of the phenolic chelate resin is an aminocarboxylic acid group.
Claim 9
Dependent Claim
27 words
The resin of claim 1, wherein the etherification agent is a halohydrin, and the chelate group of the phenolic chelate resin is an iminodi-aliphatic carboxylic acid group.
Claim 10
Dependent Claim
26 words
The resin of claim 1, wherein the etherification agent is an alkyl halide, and the chelate group of the phenolic chelate resin is an amine group.
Claim 11
Dependent Claim
26 words
The resin of claim 1, wherein the etherification agent is an alkyl halide, and the chelate group of the phenolic chelate resin is a urea group.
Claim 12
Dependent Claim
26 words
The resin of claim 1, wherein the etherification agent is a dialkyl sulfate, and the chelate group of the phenolic chelate resin is an amine group.
Claim 13
Dependent Claim
26 words
The resin of claim 1, wherein the etherification agent is a dialkyl sulfate, and the chelate group of the phenolic chelate resin is a urea group.
Claim 14
Dependent Claim
68 words
A process for producing an etherified phenolic chelate resin, which comprises contacting a metal ion having the ability to form a complex with a phenolic chelate resin with a phenolic chelate resin to adsorb the metal ion onto the chelate groups thereof thereby stabilizing and protecting the chelate groups of the phenolic chelate resin, and reacting phenolic hydroxyl groups of the phenolic chelate resin with an etherifying agent.
Claim 15
Dependent Claim
68 words
A process for producing an etherified phenolic chelate resin, which comprises contacting a metal ion having the ability to form a complex with a phenolic chelate resin with a phenolic chelate resin to adsorb the metal ion onto the chelate groups thereof thereby stabilizing and protecting the chelate groups of the phenolic chelate resin, and reacting phenolic hydroxyl groups of the phenolic chelate resin with an etherifying agent.
Claim 16
Dependent Claim
23 words
The process of claim 13, wherein the etherification is carried out in an aqueous solution having a pH of about 7 to 14.
Claim 17
Dependent Claim
22 words
The process of claim 13, wherein the etherification is carried out in an aqueous solution having a pH of 9 to 13.
Claim 18
Dependent Claim
18 words
The process of claim 13, wherein the etherification is carried out at about 30° to about 100° C.
Claim 19
Dependent Claim
26 words
The process of claim 13, wherein the metal ion having the ability to form a complex with the phenolic chelate resin is a light metal ion.
Claim 20
Dependent Claim
12 words
The process of claim 17, wherein the metal ion is calcium ion.
Claim 21
Dependent Claim
26 words
The process of claim 13, wherein the metal ion having the ability to form a complex with the phenolic chelate resin is a heavy metal ion.
Claim 22
Dependent Claim
12 words
The process of claim 19, wherein the metal ion is copper ion.
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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |