US3983019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of the mercury isotopes by the indirect photochemical method
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1973-10-01
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Granted: 1976-09-28
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Expires: 1993-10-01
Abstract
Abstract A method of photochemical separation of the mercury isotopes by the so-called indirect route in which a gas stream of oxygen and butadiene containing a mixture of mercury isotopes is passed through one or a number of vessels placed in series. The gas stream is irradiated by a lamp containing mercury which is depleted in one or a number of the isotopes and said isotopes are recovered in a trap placed downstream of the vessel or vessels.
Inventors
- 👤 Fernande Botter nee Bergheaud
- 👤 Monique Scaringella nee Desnoyer
- 👤 Michel Wacongne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:19
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A method of photochemical separation of the mercury isotopes comprising the steps of passing through at least one vessel mounted in series, a gas stream of oxygen and butadiene containing a mixture of mercury isotopes, irradiating said gas stream by a lamp containing mercury depleted in at least one of the desired isotopes and then recovering said desired isotopes in a trap placed downstream of the vessels.
Claim 2
Independent Claim
67 words
A method of photochemical separation of the mercury isotopes comprising the steps of passing through at least one vessel mounted in series, a gas stream of oxygen and butadiene containing a mixture of mercury isotopes, irradiating said gas stream by a lamp containing mercury depleted in at least one of the desired isotopes and then recovering said desired isotopes in a trap placed downstream of the vessels.
Claim 3
Dependent Claim
21 words
A method of separation according to claim 1, wherein the irradiation is carried out by means of a natural mercury lamp.
Claim 4
Dependent Claim
40 words
A method of separation according to claim 1, wherein the irradiation is carried out by means of a lamp containing mercury which is depleted in all the isotopes except for the isotope in which the mixture is to be depleted.
Claim 5
Dependent Claim
23 words
A method of separation according to claim 3, wherein the isotope in which the mixture is to be depleted is Hg 202 .
Claim 6
Dependent Claim
17 words
A method of separation according to claim 1, wherein the mixture of mercury isotopes is natural mercury.
Claim 7
Dependent Claim
22 words
A method of separation according to claim 1, wherein the mixture of mercury isotopes is enriched in the isotope to be isolated.
Claim 8
Dependent Claim
18 words
A method of separation according to claim 6, wherein the isotope to be isolated is HG 196 .
Claim 9
Dependent Claim
17 words
A method of separation according to claim 1, the vessels being annular and surrounding a mercury lamp.
Claim 10
Dependent Claim
24 words
A method of separation according to claim 1, the vessel being a single annular vessel surrounding a mercury lamp and comprising a spiral fluid-circuit.
Claim 11
Dependent Claim
41 words
A method of separation according to claim 1, the vessel being a single annular vessel surrounding a mercury lamp and the mixture of isotopes being circulated several times within said vessel before effecting the withdrawal of the desired isotope or isotopes.
Claim 12
Dependent Claim
30 words
A method of separation according to claim 1, wherein the gas stream has a flow rate of approximately 1 to 10 cm 3 /sec at a pressure of 10 torrs.
References Cited (Backward Citations)
US2713025A
Cited
US3673406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |