Patent US4119706A successfully refreshed from Google Patents.
US4119706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalytically recombining radiolytic hydrogen and radiolytic oxygen
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1976-10-12
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Granted: 1978-10-10
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Expires: 1996-10-12
Abstract
Abstract A catalytic reactor useful for carrying out a catalytic reaction comprises a horizontally disposed reaction zone. Foraminous retaining means are disposed within said reactor or reaction zone transversely thereof and occupying the complete cross-section of said reaction zone available for the flow of gaseous or vaporized reactants therethrough. The foraminous retaining means define a transverse volume along a portion of the length of the reactor and are adapted to be filled with particle-form catalytic material. A chamber is disposed at the upper portion of and in open communication with said transverse volume. The chamber is adapted to be filled with particle-form catalytic material so as to maintain the transverse volume filled with particle-form catalytic material. The catalytic reactor is generally useful for carrying out catalytic reactions involving gaseous or vaporized reactants and a mass of particle-form catalytic material.
Inventors
- 👤 William M. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:38
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/02; B; B01; B01J; B01J8/00; B01J8/02; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00168; B01J2208/00194; B01J2208/00389; B01J2208/00407; B01J2208/0053; B01J2219/00; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
A method of treating the condenser off-gases of a boiling water nuclear reactor wherein said off-gases contain a major amount of steam or water vapor and minor amounts of radiolytic hydrogen and radiolytic oxygen together with minor amounts of air and radioactive gases which comprises introducing said off-gases into contact with a mass of particle-form catalytic material disposed within a reaction zone, said mass of particle-form catalytic material occupying the complete cross-section of a length of said reaction zone, said particle-form catalytic material effecting the catalytic reaction of hydrogen and oxygen to produce water vapor, maintaining said mass of particle-form catalytic material substantially filling or occupying the complete cross-section of said reaction zone along a length of said reaction zone by maintaining a reservoir of said particle-form catalytic material above said reaction zone and in open communication therewith so that as said particle-form catalytic material becomes depleted from or otherwise leaves said reaction zone additional particle-form catalytic material moves or falls by gravity via at least two substantially independent flowpaths into said reaction zone to maintain said reaction zone completely filled with said particle-form catalytic material and cooling the resulting reaction product gases, now substantially depleted with respect to hydrogen and oxygen.
Claim 2
Independent Claim
202 words
A method of treating the condenser off-gases of a boiling water nuclear reactor wherein said off-gases contain a major amount of steam or water vapor and minor amounts of radiolytic hydrogen and radiolytic oxygen together with minor amounts of air and radioactive gases which comprises introducing said off-gases into contact with a mass of particle-form catalytic material disposed within a reaction zone, said mass of particle-form catalytic material occupying the complete cross-section of a length of said reaction zone, said particle-form catalytic material effecting the catalytic reaction of hydrogen and oxygen to produce water vapor, maintaining said mass of particle-form catalytic material substantially filling or occupying the complete cross-section of said reaction zone along a length of said reaction zone by maintaining a reservoir of said particle-form catalytic material above said reaction zone and in open communication therewith so that as said particle-form catalytic material becomes depleted from or otherwise leaves said reaction zone additional particle-form catalytic material moves or falls by gravity via at least two substantially independent flowpaths into said reaction zone to maintain said reaction zone completely filled with said particle-form catalytic material and cooling the resulting reaction product gases, now substantially depleted with respect to hydrogen and oxygen.
Claim 3
Dependent Claim
61 words
A method in accordance with claim 1 wherein steam or water vapor as a diluent is added to said off-gases before said off-gases are brought into contact with said mass of particle-form catalytic material, the amount of steam or water vapor thus introduced into said off-gases being sufficient to reduce the hydrogen content of said off-gases below about 4% by volume.
Claim 4
Dependent Claim
62 words
A method in accordance with claim 1 wherein air or an inert gas as a gaseous diluent is added to said off-gases before said off-gases are brought into contact with said mass of particle-form catalytic material, the amount of said gaseous diluent thus introduced into said off-gases being sufficient to reduce the hydrogen content of said off-gases below about 4% by volume.
Claim 5
Dependent Claim
33 words
A method in accordance with claim 1 wherein said off-gases are heated to a temperature in the range about 200°-400° F. before being introduced into contact with said mass of particle-form catalytic material.
Claim 6
Dependent Claim
33 words
A method in accordance with claim 1 wherein said off-gases are heated to a temperature in the range about 300° F. before being introduced into contact with said mass of particle-form catalytic material.
Claim 7
Dependent Claim
34 words
A method in accordance with claim 1 wherein said off-gases are contacted with said mass of particle-form catalytic material at an elevated pressure in the range from about 0 psig to about 1500 psig.
Claim 8
Dependent Claim
40 words
A method in accordance with claim 1 wherein said off-gases are heated to a temperature in the range 200°-400° F. before contact with said catalytic material and wherein said catalytic material contains a catalytically effective amount of platinum group metal.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |