US4654149A
Expired / Lapsed
US
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Process for treating ammonium nitrate-containing waste water
Assignee: Osaka Gas Co Ltd
•
Filing: 1986-03-25
•
Granted: 1987-03-31
•
Expires: 2006-03-25
Abstract
Abstract This invention provides a process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Inventors
- 👤 Yoshiaki Harada
- 👤 Teizou Okino
- 👤 Hiroyuki Mathura
- 👤 Yasuhumi Doi
- 👤 Kenichi Yamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:45
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J27/043; B01J27/045; B01J27/06; B01J27/08; B01J27/128; B01J27/13; C; C02; C02F; C02F1/00; C02F1/02; C02F1/025; C02F11/00; C02F11/06; C02F11/08; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
73 words
A process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 2
Dependent Claim
73 words
A process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 3
Dependent Claim
27 words
A process as defined in claim 1 wherein the waste water is subjected to the wet thermal decomposition at a pH of about 5 to about 11.
Claim 4
Dependent Claim
27 words
A process as defined in claim 1 wherein the active component of the catalyst comprises at least one of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 5
Dependent Claim
35 words
A process as defined in claim 1 wherein the active component of the catalyst comprises at least one of compounds insoluble or sparingly soluble in water of ruthenium, rhodium, palladium, osmium, iridium, platinum and glod.
Claim 6
Dependent Claim
28 words
A process as defined in claim 4 wherein the active component of the catalyst comprises at least one of ruthenium dichloride, platinum dichloride, ruthenium sulfide and rhodium sulfide.
Claim 7
Dependent Claim
23 words
A process as defined in claim 1 wherein the wet thermal decomposition is carried out in a reactor of the fixed bed type.
Claim 8
Dependent Claim
23 words
A process as defined in claim 1 wherein the wet thermal decomposition is carried out in a reactor of the fluidized bed type.
Claim 9
Dependent Claim
25 words
A process as defined in claim 1 wherein the wet thermal decomposition is carried out at a temperature of about 200° to about 300° C.
Claim 10
Dependent Claim
108 words
A process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 11
Dependent Claim
108 words
A process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 12
Dependent Claim
27 words
A process as defined in claim 9 wherein the waste water is subjected to the wet thermal decomposition at a pH of about 5 to about 11.
Claim 13
Dependent Claim
27 words
A process as defined in claim 9 wherein the active component of the catalyst comprises at least one of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 14
Dependent Claim
35 words
A process as defined in claim 9 wherein the active component of the catalyst comprises at least one of compounds insoluble or sparingly soluble in water of ruthenium, rhodium, palladium, osmium, iridium, platinum and glod.
Claim 15
Dependent Claim
28 words
A process as defined in claim 12 wherein the active component of the catalyst comprises at least one of ruthenium dichloride, platinum dichloride, ruthenium sulfide and rhodium sulfide.
Claim 16
Dependent Claim
23 words
A process as defined in claim 9 wherein the wet thermal decomposition is carried out in a reactor of the fixed bed type.
Claim 17
Dependent Claim
23 words
A process as defined in claim 9 wherein the wet thermal decomposition is carried out in a reactor of the fluidized bed type.
Claim 18
Dependent Claim
25 words
A process as defined in claim 9 wherein the wet thermal decomposition is carried out at a temperature of about 200° to about 300° C.
Claim 19
Dependent Claim
28 words
A process as defined in claim 9 wherein the oxygen-containing gas is fed in an amount of about 0.2 to about 0.6 time the theoretical amount of oxygen.
Claim 20
Dependent Claim
128 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water ammonia in a mole ratio of 1<NH 3 -N/NO 3 -N≦5, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 21
Dependent Claim
128 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water ammonia in a mole ratio of 1<NH 3 -N/NO 3 -N≦5, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 22
Dependent Claim
27 words
A process as defined in claim 18 wherein the waste water is subjected to the wet thermal decomposition at a pH of about 5 to about 11.
Claim 23
Dependent Claim
27 words
A process as defined in claim 18 wherein the active component of the catalyst comprises at least one of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 24
Dependent Claim
35 words
A process as defined in claim 18 wherein the active component of the catalyst comprises at least one of compounds insoluble or sparingly soluble in water of ruthenium, rhodium, palladium, osmium, iridium, platinum and glod.
Claim 25
Dependent Claim
28 words
A process as defined in claim 21 wherein the active component of the catalyst comprises at least one of ruthenium dichloride, platinum dichloride, ruthenium sulfide and rhodium sulfide.
Claim 26
Dependent Claim
23 words
A process as defined in claim 18 wherein the wet thermal decomposition is carried out in a reactor of the fixed bed type.
Claim 27
Dependent Claim
23 words
A process as defined in claim 18 wherein the wet thermal decomposition is carried out in a reactor of the fluidized bed type.
Claim 28
Dependent Claim
25 words
A process as defined in claim 18 wherein the wet thermal decomposition is carried out at a temperature of about 200° to about 300° C.
Claim 29
Dependent Claim
28 words
A process as defined in claim 18 wherein the oxygen-containing gas is fed in an amount of about 0.2 to about 0.6 time the theoretical amount of oxygen.
Claim 30
Dependent Claim
132 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water not more than 1 mole of COD component per mole of NO 3 - ion, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 31
Dependent Claim
132 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water not more than 1 mole of COD component per mole of NO 3 - ion, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 32
Dependent Claim
27 words
A process as defined in claim 27 wherein the waste water is subjected to the wet thermal decomposition at a pH of about 5 to about 11.
Claim 33
Dependent Claim
27 words
A process as defined in claim 27 wherein the active component of the catalyst comprises at least one of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 34
Dependent Claim
35 words
A process as defined in claim 27 wherein the active component of the catalyst comprises at least one of compounds insoluble or sparingly soluble in water of ruthenium, rhodium, palladium, osmium, iridium, platinum and glod.
Claim 35
Dependent Claim
28 words
A process as defined in claim 30 wherein the active component of the catalyst comprises at least one of ruthenium dichloride, platinum dichloride, ruthenium sulfide and rhodium sulfide.
Claim 36
Dependent Claim
23 words
A process as defined in claim 27 wherein the wet thermal decomposition is carried out in a reactor of the fixed bed type.
Claim 37
Dependent Claim
23 words
A process as defined in claim 27 wherein the wet thermal decomposition is carried out in a reactor of the fluidized bed type.
Claim 38
Dependent Claim
25 words
A process as defined in claim 27 wherein the wet thermal decomposition is carried out at a temperature of about 200° to about 300° C.
Claim 39
Dependent Claim
28 words
A process as defined in claim 27 wherein the oxygen-containing gas is fed in an amount of about 0.2 to about 0.6 time the theoretical amount of oxygen.
Claim 40
Dependent Claim
30 words
A process as defined in claim 27 wherein the amount of the COD component to be added is about 0.1 to about 0.5 mole per mole of NO.sub. - ion.
Claim 41
Dependent Claim
144 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water not more than 1 mole of COD component per mole of NO 3 - ion and ammonia in a mole ratio of 1<NH 3 -N/NO 3 -N≦5, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 42
Dependent Claim
144 words
A process for treating ammonium nitrate-containing waste water which comprises the steps of adding to the waste water not more than 1 mole of COD component per mole of NO 3 - ion and ammonia in a mole ratio of 1<NH 3 -N/NO 3 -N≦5, and subjecting the waste water to wet thermal decomposition in the presence of (i) a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water, and (ii) oxygen in less than the theoretical amount required for decomposing the ammonia, organic substances and inorganic substances present in the waste water to N 2 , H 2 O and CO 2 while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100° to about 370° C.
Claim 43
Dependent Claim
27 words
A process as defined in claim 37 wherein the waste water is subjected to the wet thermal decomposition at a pH of about 5 to about 11.
Claim 44
Dependent Claim
27 words
A process as defined in claim 37 wherein the active component of the catalyst comprises at least one of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 45
Dependent Claim
35 words
A process as defined in claim 37 wherein the active component of the catalyst comprises at least one of compounds insoluble or sparingly soluble in water of ruthenium, rhodium, palladium, osmium, iridium, platinum and glod.
Claim 46
Dependent Claim
28 words
A process as defined in claim 40 wherein the active component of the catalyst comprises at least one of ruthenium dichloride, platinum dichloride, ruthenium sulfide and rhodium sulfide.
Claim 47
Dependent Claim
23 words
A process as defined in claim 37 wherein the wet thermal decomposition is carried out in a reactor of the fixed bed type.
Claim 48
Dependent Claim
23 words
A process as defined in claim 37 wherein the wet thermal decomposition is carried out in a reactor of the fluidized bed type.
Claim 49
Dependent Claim
25 words
A process as defined in claim 37 wherein the wet thermal decomposition is carried out at a temperature of about 200° to about 300° C.
Claim 50
Dependent Claim
28 words
A process as defined in claim 37 wherein the oxygen-containing gas is fed in an amount of about 0.2 to about 0.6 time the theoretical amount of oxygen.
Claim 51
Dependent Claim
30 words
A process as defined in claim 37 wherein the amount of COD component to be added is about 0.1 to about 0.5 mole per mole of NO s - ion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |