US3886080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelating agents coupled to inorganic carriers and method of preparing
Assignee: Phillips Petroleum Co
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Filing: 1973-09-04
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Granted: 1975-05-27
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Expires: 1993-09-04
Abstract
Abstract Reusable composite comprising a chelating agent chemically coupled to an essentially insoluble inorganic carrier by means of an intermediate silane coupling agent. The chelating agent is bonded to the silane coupling agent by means of an azo linkage. Methods of preparing and using the composite are disclosed.
Inventors
- 👤 Gerald D Schucker
- 👤 Ken F Sugarvara
- 👤 Howard H Weetoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
B; B01; B01J; B01J45/00; C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
AN INSOLUBLE COMPOSITE COMPRISING AN INORGANIC CARRIER CHEMICALLY COUPLED TO A CHELATING AGENT BY MEANS OF AN INTERMEDIATE SILANE COUPLING AGENT HAVING A SILICON PORTION AND AN ORGANIC PORTION WHEREIN THE COUPLING AGENT IS ATTACHED TO THE CARRIER BY MEANS OF THE SILICON PORTION AND ATTACHED TO THE CHELATING AGENT THROUGH AN AZO LINKAGE BY MEANS OF THE ORGANIC PORTION OF THE COUPLING AGENT, THE CHELATING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF 8-HYDROXYQUINOLINE, DITHIZONE, NEOCUPROINE, O-PHENATHROLINE, AND SALICYLALDOXLINE.
Claim 2
Dependent Claim
80 words
AN INSOLUBLE COMPOSITE COMPRISING AN INORGANIC CARRIER CHEMICALLY COUPLED TO A CHELATING AGENT BY MEANS OF AN INTERMEDIATE SILANE COUPLING AGENT HAVING A SILICON PORTION AND AN ORGANIC PORTION WHEREIN THE COUPLING AGENT IS ATTACHED TO THE CARRIER BY MEANS OF THE SILICON PORTION AND ATTACHED TO THE CHELATING AGENT THROUGH AN AZO LINKAGE BY MEANS OF THE ORGANIC PORTION OF THE COUPLING AGENT, THE CHELATING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF 8-HYDROXYQUINOLINE, DITHIZONE, NEOCUPROINE, O-PHENATHROLINE, AND SALICYLALDOXLINE.
Claim 3
Dependent Claim
29 words
The composite, as claimed in claim 1, wherein the carrier is selected from the group consisting of silica, silica gels, glass, porous glass, bentonite, hydroxyapatite, alumina, and nickel oxide.
Claim 4
Independent Claim
88 words
A method of preparing an insoluble composite comprising the steps of: a. silanizing an essentially insoluble inorganic carrier having surface oxide or hydroxyl groups capable of bonding to the silicon portion of the silane coupling agent with a diazotizable silane coupling agent; b. diazotizing the silanized carrier; and c. chemically coupling the diazotized silanized carrier to a chelating agent by contacting the diazotized silanized carrier with a solution of the chelating agent, the chelating agent being selected from the group consisting of 8-hydroxyquinoline, dithizone, neocuproine, O-phenanthroline, and salicylaldoxime.
Claim 5
Independent Claim
88 words
A method of preparing an insoluble composite comprising the steps of: a. silanizing an essentially insoluble inorganic carrier having surface oxide or hydroxyl groups capable of bonding to the silicon portion of the silane coupling agent with a diazotizable silane coupling agent; b. diazotizing the silanized carrier; and c. chemically coupling the diazotized silanized carrier to a chelating agent by contacting the diazotized silanized carrier with a solution of the chelating agent, the chelating agent being selected from the group consisting of 8-hydroxyquinoline, dithizone, neocuproine, O-phenanthroline, and salicylaldoxime.
Claim 6
Dependent Claim
30 words
The method, as claimed in claim 3, wherein the carrier used is selected from the group consisting of silica, silica gels, glass, porous glass, bentonite, hydroxyapatite, alumina, and nickel oxide.
References Cited (Backward Citations)
US3484390A
Cited
US3519538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |