US4915929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isotopic separation of D2 O from H2 O using ruthenium adsorbent
Assignee: Iowa State University Research Foundation Inc
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Filing: 1988-01-25
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Granted: 1990-04-10
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Expires: 2008-01-25
Abstract
Abstract A method of enrichment of D 2 O in solutions of D 2 O in H 2 O by contacting said solutions in the steam phase with hexagonal crystalline to produce enriched D 2 O. The passages may be repeated to achieve a desired amount of D 2 O.
Inventors
- 👤 Patricia A. Thiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:44
CPC Classifications
C; C01; C01B; C01B5/00; C01B5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A one-phase method for enriching the concentration of D 2 O in solutions of D 2 O and H 2 O comprising contacting in the absence of hydrogen gas steam phase D 2 O and steam phase H 2 O, with the hexagonal surface of crystalline ruthenium having a particle size greater than 10 nanometers so that sufficient (0001) face is exposed to produce enriched D 2 O.
Claim 2
Dependent Claim
68 words
A one-phase method for enriching the concentration of D 2 O in solutions of D 2 O and H 2 O comprising contacting in the absence of hydrogen gas steam phase D 2 O and steam phase H 2 O, with the hexagonal surface of crystalline ruthenium having a particle size greater than 10 nanometers so that sufficient (0001) face is exposed to produce enriched D 2 O.
Claim 3
Dependent Claim
14 words
The method of claim 1 further comprising placing said ruthenium within a reaction chamber.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein said ruthenium is packed within said reaction chamber.
Claim 5
Dependent Claim
32 words
The method of claim 3 wherein said ruthenium is divided into particles in the range of greater than 10 nanometers so that sufficient ruthenium (0001) face is exposed up to 50 microns.
Claim 6
Dependent Claim
27 words
The method of claim 1 further comprising contacting said enriched D 2 O with said ruthenium(0001) repeatedly to produce a desired amount of enriched D 2 O.
Claim 7
Dependent Claim
59 words
A one-phase method of enriching the concentration of D 2 O and solutions of D 2 O and H 2 O comprising contacting said D 2 O and H 2 O in the steam phase with the hexagonal surface of crystalline ruthenium wherein said ruthenium is divided into particles of about 1 micron to produce enriched D 2 O.
Claim 8
Dependent Claim
59 words
A one-phase method of enriching the concentration of D 2 O and solutions of D 2 O and H 2 O comprising contacting said D 2 O and H 2 O in the steam phase with the hexagonal surface of crystalline ruthenium wherein said ruthenium is divided into particles of about 1 micron to produce enriched D 2 O.
Claim 9
Dependent Claim
110 words
A one-phase method of enriching the concentration of D 2 O in solutions of D 2 O and H 2 O comprising packing a column with ruthenium having particle size in the range greater than 10 nanometers so that sufficient (0001) face is exposed up to 50 microns; vaporizing said solution of D 2 O and H 2 O; in the absence of hydrogen gas passing said D 2 O and H 2 O solution in the steam phase through said column vaporized to produce enriched D 2 O; and repeating passages of said enriched D 2 O produced through said column to achieve an enrichment of D 2 O.
Claim 10
Dependent Claim
110 words
A one-phase method of enriching the concentration of D 2 O in solutions of D 2 O and H 2 O comprising packing a column with ruthenium having particle size in the range greater than 10 nanometers so that sufficient (0001) face is exposed up to 50 microns; vaporizing said solution of D 2 O and H 2 O; in the absence of hydrogen gas passing said D 2 O and H 2 O solution in the steam phase through said column vaporized to produce enriched D 2 O; and repeating passages of said enriched D 2 O produced through said column to achieve an enrichment of D 2 O.
Claim 11
Dependent Claim
77 words
A one-phase method of enriching the concentration of D 2 O in solution of D 2 O and H 2 O comprising packing a column with ruthenium having particle size of about 1 micron; passing said D 2 O and H 2 O solution in the steam phase through said column to produce enriched D 2 O; and repeating passages of said enriched D 2 O produced through said column to achieve enrichment of D 2 O.
Claim 12
Dependent Claim
77 words
A one-phase method of enriching the concentration of D 2 O in solution of D 2 O and H 2 O comprising packing a column with ruthenium having particle size of about 1 micron; passing said D 2 O and H 2 O solution in the steam phase through said column to produce enriched D 2 O; and repeating passages of said enriched D 2 O produced through said column to achieve enrichment of D 2 O.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |