US4711863A
Expired / Lapsed
US
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Immobilized extractants
Assignee: National Research Development Corp UK
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Filing: 1986-03-10
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Granted: 1987-12-08
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Expires: 2006-03-10
Abstract
Abstract A process for the production of a solid, particulate immobilized extractant, which process comprises adsorbing (a) a liquid extractant which is not homopolymerizable onto (b) a porous, solid, particulate, substrate; adsorbing (c) a monomer onto the substrate; and polymerizing the adsorbed monomer (c) thereby entrapping the liquid extractant (a) on substrate (b).
Inventors
- 👤 Michael Streat
- 👤 Sofia Belfer-Canterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:29
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28054; B01J20/28095; B01J20/28097; B01J45/00; B01J47/00; B01J47/018; C; C01; C01G; C01G3/00; C01G3/003; C01G7/00; C01G7/003; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
A process for the production of a solid, particulate immobilised extractant, which process comprises adsorbing (a) a liquid extractant which is not homopolymerisable onto (b) a porous, solid, particulate, substrate; adsorbing (c) a monomer onto the substrate; and polymerising the adsorbed monomer (c) by subjecting the monomer (c) to irradiation, thereby entrapping the liquid extractant (a) on substrate (b).
Claim 2
Dependent Claim
59 words
A process for the production of a solid, particulate immobilised extractant, which process comprises adsorbing (a) a liquid extractant which is not homopolymerisable onto (b) a porous, solid, particulate, substrate; adsorbing (c) a monomer onto the substrate; and polymerising the adsorbed monomer (c) by subjecting the monomer (c) to irradiation, thereby entrapping the liquid extractant (a) on substrate (b).
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the particulate substrate (b) is an inorganic particulate substrate.
Claim 4
Dependent Claim
25 words
A process according to claim 1 wherein the partculate substrate (b) has a specific surface area from 100 to 800 m 2 g -1 .
Claim 5
Dependent Claim
21 words
A process according to claim 3 wherein the specific surface area is from 400 to 600 m 2 g -1 .
Claim 6
Dependent Claim
16 words
A process according to claim 1 wherein the average pore diameter is from 10 to 300μ.
Claim 7
Dependent Claim
16 words
A process according to claim 5 wherein the average pore diameter is from 20 to 100μ.
Claim 8
Dependent Claim
19 words
A process according to claim 1, wherein the substrate (b) is subjected to pre-irradiation prior to adsorbing the monomer.
Claim 9
Dependent Claim
17 words
A process according to claim 7 wherein the surface of the particulate substrate (b) comprises hydroxyl groups.
Claim 10
Dependent Claim
14 words
A process according to claim 1 wherein the monomer (c) comprises a cross-linking monomer.
Claim 11
Dependent Claim
21 words
A process according to claim 1 wherein the polymerisiation is effected by subjecting the monomer (c) to UV, X or γ-irradiation.
Claim 12
Dependent Claim
18 words
A process according to claim 10 wherein the total dose of radiation is from 20 to 40 Mrad.
Claim 13
Dependent Claim
92 words
A process for the production of a solid, particulate immobilized extractant, which comprises adsorbing (a) a liquid extractant which is not homopolymerizable selected from the group consisting of organic neutral or acid esters of phosphorous, organic phosphine oxides, amines, amino acids and chelate compounds onto (b) a porous, solid particulate inorganic substrate; adsorbing (c) a monomer selected from the group consisting of monovinyl compounds and mixtures thereof onto the substrate; and polymerizing the adsorbed monomer (c) by subjecting the monomer (c) to irradiation, thereby entrapping the liquid extractant (a) on substrate (b).
Claim 14
Dependent Claim
92 words
A process for the production of a solid, particulate immobilized extractant, which comprises adsorbing (a) a liquid extractant which is not homopolymerizable selected from the group consisting of organic neutral or acid esters of phosphorous, organic phosphine oxides, amines, amino acids and chelate compounds onto (b) a porous, solid particulate inorganic substrate; adsorbing (c) a monomer selected from the group consisting of monovinyl compounds and mixtures thereof onto the substrate; and polymerizing the adsorbed monomer (c) by subjecting the monomer (c) to irradiation, thereby entrapping the liquid extractant (a) on substrate (b).
Claim 15
Dependent Claim
19 words
A process according to claim 12, wherein said substrate (b) is a dried inorganic gel or an inorganic silicate.
Claim 16
Dependent Claim
11 words
An immobilised extractant whenever prepared by the process of claim 12.
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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |