US5358645A
Expired / Lapsed
US
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Zirconium oxide ceramics for surfaces exposed to high temperature water oxidation environments
Assignee: Modar Inc
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Filing: 1992-08-26
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Granted: 1994-10-25
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Expires: 2012-08-26
Abstract
Abstract Disclosed is an apparatus and a process for high temperature water oxidation of combustibles in which during at least a part of the oxidation, corrosive material is present and makes contact with at least a portion of the apparatus over a contact area on the apparatus, wherein at least a portion of the contact surface area comprises a zirconia based ceramic, with the temperature of the oxidation process in excess of about 300 DEG C. and the pressure of the oxidation process is in excess of about 27.5 bar (400 psi).
Inventors
- 👤 Glenn T. Hong
- 👤 William R. Killilea
- 👤 David W. Ordway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:47
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/06; C02F11/08; C02F11/086
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
110 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the oxidation, corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at a temperature range of about 400° C. to about 650° C. and at pressures from about 27.5 bar (400 psi) to about 345 bar (5000 psi), and the contact area comprises a zirconia based ceramic.
Claim 2
Dependent Claim
110 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the oxidation, corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at a temperature range of about 400° C. to about 650° C. and at pressures from about 27.5 bar (400 psi) to about 345 bar (5000 psi), and the contact area comprises a zirconia based ceramic.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the zirconia based ceramic has a porosity of about 10 percent or less.
Claim 4
Dependent Claim
54 words
The process of claim 1 wherein the corrosive material comprises at least one moiety selected from the group consisting of Cl, SO 4 , NO 3 , PO 4 , BO 2 , Br, OH, CO 3 and at least one moiety selected from the group consisting of H, Na, K, Ca, and Mg.
Claim 5
Dependent Claim
56 words
The process of claim 3 wherein the corrosive material comprises at least one selected from the group consisting of HCl, H 2 SO 4 , HNO 3 , H 3 PO 4 , NaOH, Na 2 CO 3 , and salts of at least one selected from the group consisting of Na, K, Ca, and Mg.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein the ceramic comprises in the range of about 70 to about 100 weight percent zirconia.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein the oxidation apparatus comprises a reactor selected from the group of reactors consisting of vessel reactors, hydraulic column reactors, and pipe reactors.
Claim 8
Dependent Claim
39 words
The process of claim 6 wherein the corrosive material contacts at least a portion of the reactor over a reactor contact area on the reactor, and at least a portion of the reactor contact area comprises zirconia based ceramic.
Claim 9
Dependent Claim
39 words
The process of claim 1 wherein the oxidation is at temperatures in the range of about 500° to about 650° C., and at pressures in the range of about 27.5 bar (400 psi) to about 275 bar (4000 psi).
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the contact area comprises loose fill material comprising zirconia based ceramic.
Claim 11
Dependent Claim
14 words
The process of claim 1 wherein the contact area comprises zirconia based ceramic brick.
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein the contact area comprises a zirconia based ceramic lining.
Claim 13
Dependent Claim
15 words
The process of claim 11 wherein the lining is comprised of zirconia based ceramic brick.
Claim 14
Dependent Claim
15 words
The process of claim 1 wherein the contact area comprises a zirconia based ceramic coating.
Claim 15
Dependent Claim
19 words
The process of claim 1 wherein the contact area comprises zirconia based ceramic that has been cast or machined.
Claim 16
Dependent Claim
39 words
The process of claim 1 wherein the oxidation is at temperatures in the range of about 400° to about 650° C., and at pressures in the range of about 27.5 bar (400 psi) to about 345 bar (5000 psi).
Claim 17
Dependent Claim
115 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at temperatures exceeding 300° C., and at pressures exceeding about 27.5 bar (400 psi), and the contact area comprises a zirconia based ceramic which is stabilized with at least one stabilizing agent selected from the group consisting of yttria, calcia and magnesia.
Claim 18
Dependent Claim
115 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at temperatures exceeding 300° C., and at pressures exceeding about 27.5 bar (400 psi), and the contact area comprises a zirconia based ceramic which is stabilized with at least one stabilizing agent selected from the group consisting of yttria, calcia and magnesia.
Claim 19
Dependent Claim
26 words
The process of claim 16 wherein the zirconia based ceramic has an amount of stabilizing agent necessary to render it partially stabilized at the oxidation conditions.
Claim 20
Dependent Claim
101 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at temperatures exceeding 300° C., and at pressures exceeding about 27.5 bar (400 psi), and the contact area comprises a zirconia based ceramic which is stabilized with magnesia.
Claim 21
Dependent Claim
101 words
A process for high temperature water oxidation of combustible corrosive material in a high temperature water oxidation apparatus, in which during at least part of the corrosive material is present and contacts the apparatus over a contact area on the apparatus, the process comprising contacting in an aqueous phase the combustible corrosive material and an oxidizing agent under conditions suitable to cause the combustion of the combustible corrosive material, wherein the combustion is at temperatures exceeding 300° C., and at pressures exceeding about 27.5 bar (400 psi), and the contact area comprises a zirconia based ceramic which is stabilized with magnesia.
References Cited (Backward Citations)
US2665249A
Cited
US2944396A
Cited
US4052302A
Cited
US4292953A
Cited
US4294706A
Cited
US4543190A
Cited
US4338199A
Cited
US4338199B1
Cited
JPS5864188A
Cited
JPS5919757A
Cited
US4604215A
Cited
US4751005A
Cited
JPS63291874A
Cited
EP0414558A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |