US4545964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of porous products based on cobalt fluoride or lead fluoride
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1983-02-16
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Granted: 1985-10-08
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Expires: 2003-02-16
Abstract
Abstract A process for the preparation of porous products containing cobalt fluoride CoF2 or lead fluoride PbF2, wherein it comprises thermally decomposing lead fluosilicate or cobalt fluosilicate.
Inventors
- 👤 Pierre Bergez
- 👤 Alain Deguelte
- 👤 Laurent Seigneurin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
C; C01; C01G; C01G21/00; C01G21/16; C01B; C01B33/00; C01B33/08; C01B33/10; C01B33/103; C01G43/00; C01G43/04; C01G43/06; C01G43/063; C01G51/00; C01G51/08; C01G56/00; C01G56/004; C01G56/006; C01G56/007; C01G56/008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A process for producing cobalt fluoride useful in the preparation of porous products containing cobalt fluoride which comprises the steps of providing an amount of cobalt fluosilicate crystals and thermally decomposing the cobalt fluosilicate crystals at a temperature in the range of from about 200° to about 600° C. under vacuum or an inert atmosphere to provide cobalt fluoride powder having a specific surface of 10 to 120 m 2 /g.
Claim 2
Dependent Claim
71 words
A process for producing cobalt fluoride useful in the preparation of porous products containing cobalt fluoride which comprises the steps of providing an amount of cobalt fluosilicate crystals and thermally decomposing the cobalt fluosilicate crystals at a temperature in the range of from about 200° to about 600° C. under vacuum or an inert atmosphere to provide cobalt fluoride powder having a specific surface of 10 to 120 m 2 /g.
Claim 3
Dependent Claim
65 words
A process according to claim 1 including the further steps of providing macroporous support to be impregnated with the cobalt fluoride, dissolving the cobalt fluosilicate in a solvent to provide a solution of cobalt fluosilicate, impregnating the macroporous support with the cobalt fluosilicate solution and subjecting the thus impregnated support to a heat treatment to effect the decomposing step and thereby provide a cobalt-filled support.
Claim 4
Dependent Claim
26 words
A process according to claim 2, wherein the cobalt fluosilicate is prepared by reacting fluosilicic acid with a cobalt salt, said salt being dissolved in acetone.
Claim 5
Dependent Claim
16 words
A process according to claim 3, wherein the cobalt salt is cobalt nitrate or cobalt acetate.
Claim 6
Dependent Claim
23 words
A process according to claim 2, wherein the macroporous support is alumina balls having a mean pore radius of 0.1 to 20 μm.
Claim 7
Dependent Claim
22 words
A process according to claim 2, wherein the macroporous support is constituted by a hollow tube made from alumina or fritted nickel.
Claim 8
Dependent Claim
31 words
A process according to claim 2, wherein the cobalt fluoride powder is deposited on the support by filtering a suspension of said powder in an organic solvent through the said support.
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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |