Patent US6238568B1 successfully refreshed from Google Patents.
US6238568B1
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Hydrothermal processing with phosphate additive
Assignee: General Atomics Corp
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Filing: 1999-05-06
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Granted: 2001-05-29
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Expires: 2019-05-06
Abstract
Abstract A system ( 10 ) and method for hydrothermal treatment of a feed material ( 11 ) includes a reaction chamber ( 14 ) in a reactor ( 12 ). Importantly, an additive ( 16 ) is added with the feed material ( 11 ) to the reaction chamber ( 14 ). The additive ( 16 ) causes a reaction medium ( 18 ) in the reaction chamber ( 14 ) to include phosphate compounds. The phosphate compounds allow precipitating salts to be transported through the reactor ( 12 ) without plugging and inhibiting the build-up of precipitating salts in the reaction chamber ( 14 ).
Inventors
- 👤 David A. Hazlebeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:04
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/20; B; B01; B01J; B01J3/00; B01J3/008; C; C02; C02F; C02F11/00; C02F11/06; C02F11/08; C02F11/086; A62D2101/00; A62D2101/20; C02F1/00; C02F1/72; Y; Y02; Y02E; Y02E50/00; Y02E50/30; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
119 words
A method for hydrothermal processing a feed material containing water soluble salts in a reaction chamber to inhibit a buildup of salts in the reaction chamber under supercritical water temperatures, the method comprising the step of: producing a reaction medium in the reaction chamber which contains a mono basic phosphate for transporting the salts through the reaction chamber, by providing an additive with at least a portion of the feed material, the reaction medium reaching supercritical water temperatures with a temperature of at least approximately 374° C. and a pressure of at least approximately 25 bar in the reaction chamber, hydrothermally processing said feed material at said temperature and said pressure, and transporting said salts through said reaction chamber.
Claim 2
Independent Claim
119 words
A method for hydrothermal processing a feed material containing water soluble salts in a reaction chamber to inhibit a buildup of salts in the reaction chamber under supercritical water temperatures, the method comprising the step of: producing a reaction medium in the reaction chamber which contains a mono basic phosphate for transporting the salts through the reaction chamber, by providing an additive with at least a portion of the feed material, the reaction medium reaching supercritical water temperatures with a temperature of at least approximately 374° C. and a pressure of at least approximately 25 bar in the reaction chamber, hydrothermally processing said feed material at said temperature and said pressure, and transporting said salts through said reaction chamber.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the step of producing a reaction medium includes producing a reaction medium wherein at least approximately one percent by weight of the total salts in the reaction medium includes phosphate.
Claim 4
Dependent Claim
36 words
The method of claim 1 wherein the step of producing a reaction medium includes producing a reaction medium wherein at least approximately 10 percent by weight of the total salts in the reaction medium includes phosphate.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the step of producing a reaction medium includes producing a reaction medium which includes mono-sodium phosphate.
Claim 6
Dependent Claim
20 words
The method of claim 1 further comprising the step of providing an additive which includes at least one phosphate compound.
Claim 7
Dependent Claim
65 words
The method of claim 1 further comprising the step of providing an additive which includes a phosphate compound selected from the group consisting of H 3 PO 4 , NaH 2 PO 4 , Na 2 HPO 4 , Na 3 PO 4 , (NH 4 ) 3 PO 4 , (NH 4 ) 2 HPO 4 , (NH 4 )H 2 PO 4 .
Claim 8
Dependent Claim
40 words
The method of claim 1 further comprising the step of providing an additive which includes a phosphate compound selected from the group consisting of KH 2 PO 4 , K 2 HPO 4 , or K 3 PO 4 .
Claim 9
Dependent Claim
20 words
The method of claim 1 further comprising the step of providing an additive which includes at least one neutralizing compound.
Claim 10
Dependent Claim
86 words
The method of claim 1 further comprising the step of providing an additive which includes a neutralizing compound selected from the group consisting of NaOH, NaHCO 3 , Na 2 CO 3 , KOH, KHCO 3 , K 2 CO 3 , Ca(OH) 2 , CaO, CaCO 3 , NaNO 3 , NaNO 2 , KNO 3 , KNO 2 Ca(NO 3 ) 2 , Na 3 PO 4 , Na 2 HPO 4 , K 3 PO 4 , and K 2 HPO 4 .
Claim 11
Dependent Claim
22 words
The method of claim 1 further comprising the step of providing an additive having a neutralizing compound which includes an organic salt.
Claim 12
Dependent Claim
65 words
The method of claim 1 further comprising the step of providing an additive which includes a neutralizing compound selected from group consisting of H 3 PO 4 , HCl, H 2 SO 4 , HF, NH 4 Cl, NH 4 ClO 4 , (NH 4 ) 3 PO 4 , (NH 4 ) 2 HPO 4 , and (NH 4 )H 2 PO 4 .
Claim 13
Dependent Claim
35 words
The method of claim 1 further comprising the step of providing an additive which includes a neutralizing compound which contains at least one element selected from the group consisting of chlorine, sulfur, phosphorus, and fluorine.
Claim 14
Dependent Claim
26 words
The method of claim 1 further comprising the step of providing an additive which includes at least one neutralizing compound and at least one phosphate salt.
Claim 15
Dependent Claim
18 words
The method of claim 1 further comprising the step of adding the additive directly to the reaction chamber.
Claim 16
Dependent Claim
37 words
The method of claim 1 further comprising the step of adding the additive to the reaction chamber in a first location and the step of adding the feed material to the reaction chamber in a second location.
Claim 17
Dependent Claim
46 words
The method of claim 1 further comprising the step of mixing at least a portion of the additive with at least a portion of the feed material to form an additive/feed material mixture and the step of adding the additive/feed material mixture to the reaction chamber.
Claim 18
Dependent Claim
60 words
The method of claim 1 including the step of providing a feed material which includes an oxidant selected from the group which includes air, oxygen, H 2 O 2 , HNO 3 , HNO 2 , NaNO 3 , NaNO 2 , NH 4 NO 3 , NH 4 NO 2 , KMnO 4 , NH 4 ClO 4 .
Claim 19
Dependent Claim
23 words
The method of claim 1 including the step of providing the feed material to the reaction chamber at a temperature below 374° C.
Claim 20
Dependent Claim
32 words
The method of claim 1 including the step of preheating at least a portion of the feed material to above an ambient temperature prior to the step of producing a reaction medium.
Claim 21
Independent Claim
109 words
A method for hydrothermal processing a feed material containing water soluble salts in a reaction chamber to inhibit a buildup of salts in the reaction chamber under supercritical water temperatures, having a temperature of above approximately 374° C. and a pressure of above approximately 25 bar, the method comprising the steps of: releasing a feed material into the reaction chamber; and mixing an additive with the feed material so that a reaction medium in the reaction chamber contains a mono basic phosphate for transporting the salts through the reaction chamber, hydrothermally processing said feed material at said temperature and said pressure, and transporting said salts through said reaction chamber.
Claim 22
Independent Claim
109 words
A method for hydrothermal processing a feed material containing water soluble salts in a reaction chamber to inhibit a buildup of salts in the reaction chamber under supercritical water temperatures, having a temperature of above approximately 374° C. and a pressure of above approximately 25 bar, the method comprising the steps of: releasing a feed material into the reaction chamber; and mixing an additive with the feed material so that a reaction medium in the reaction chamber contains a mono basic phosphate for transporting the salts through the reaction chamber, hydrothermally processing said feed material at said temperature and said pressure, and transporting said salts through said reaction chamber.
Claim 23
Dependent Claim
22 words
The method of claim 20 wherein the step of mixing the additive occurs prior to the step of releasing the feed material.
Claim 24
Dependent Claim
21 words
The method of claim 20 wherein the step of mixing the additive occurs after the step of releasing the feed material.
Claim 25
Dependent Claim
36 words
The method of claim 20 wherein the step of mixing results in producing a reaction medium wherein at least approximately one percent by weight of the total salts in the reaction medium includes mono basic phosphate.
Claim 26
Dependent Claim
36 words
The method of claim 20 wherein the step of mixing results in producing a reaction medium wherein at least approximately 10 percent by weight of the total salts in the reaction medium includes mono basic phosphate.
Claim 27
Dependent Claim
20 words
The method of claim 20 wherein the step of mixing results in producing a reaction medium which includes mono-sodium phosphate.
Claim 28
Dependent Claim
16 words
The method of claim 20 wherein said mono basic phosphate is Na 2 HPO 4 .
Claim 29
Dependent Claim
16 words
The method of claim 20 wherein said mono basic phosphate is K 2 HPO 4 .
Claim 30
Dependent Claim
20 words
The method of claim 20 further comprising the step of providing an additive which includes at least one neutralizing compound.
Claim 31
Dependent Claim
87 words
The method of claim 20 further comprising the step of providing an additive which includes a neutralizing compound selected from the group consisting of NaOH, NaHCO 3 , Na 2 CO 3 , KOH, KHCO 3 , K 2 CO 3 , Ca(OH) 2 , CaO, CaCO 3 , NaNO 3 , NaNO 2 , KNO 3 , KNO 2 , Ca(NO 3 ) 2 , Na 3 PO 4 , Na 2 HPO 4 , K 3 PO 4 , and K 2 HPO 4 .
Claim 32
Dependent Claim
22 words
The method of claim 20 further comprising the step of providing an additive having a neutralizing compound which includes an organic salt.
Claim 33
Dependent Claim
65 words
The method of claim 20 further comprising the step of providing an additive which includes a neutralizing compound selected from group consisting of H 3 PO 4 , HCl, H 2 SO 4 , HF, NH 4 Cl, NH 4 ClO 4 , (NH 4 ) 3 PO 4 , (NH 4 ) 2 HPO 4 , and (NH 4 )H 2 PO 4 .
Claim 34
Dependent Claim
35 words
The method of claim 20 further comprising the step of providing an additive which includes a neutralizing compound which contains at least one element selected from the group consisting of chlorine, sulfur, phosphorus, and fluorine.
Claim 35
Dependent Claim
28 words
The method of claim 20 further comprising the step of providing an additive which includes at least one neutralizing compound and at least one mono basic phosphate salt.
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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) | 2004-05-28 | 2004-11-27 | 2005-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-28 | 2008-11-27 | 2009-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-28 | 2012-11-27 | 2013-05-29 | $7700.00 | Window Closed / Lapsed |