US4124505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradation of organic compounds in effluents by wet oxidation
Assignee: Bayer AG
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Filing: 1976-12-06
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Granted: 1978-11-07
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Expires: 1996-12-06
Abstract
Abstract In the degradation of organic compounds in an effluent by oxidizing the effluent at an elevated temperature with oxygen, the improvement which comprises effecting the oxidation at a redox potential of from about 300 to 600 millivolts, as measured with a platinum electrode against a silver-silver chloride electrode, at a temperature of from about 80° to 250° C and under a pressure of from about 30 to 200 bars. The redox potential may be maintained by an Fe 2+ and/or Fe 3+ ion system and the pH is advantageously below about 7.
Inventors
- 👤 Otto Horak
- 👤 Hans-Ulrich Alles
- 👤 Walter Horstmann
- 👤 Knut Hammerstrom
- 👤 Ruthard Potthast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:25
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/06; C02F11/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
In the degradation of organic compounds in an effluent by oxidizing the effluent at an elevated temperature with oxygen, the improvement which comprises effecting the oxidation at a redox potential of from about 350 to 450 millivolts, as measured with a platinum electrode against a silver-silver chloride electrode, at a pH below about 2, a temperature of from about 80° to 250° C. and under a pressure of from about 3 to 200 bars, the redox potential being maintained by a catalyst system comprising Fe 2+ and Fe 3+ .
Claim 2
Dependent Claim
90 words
In the degradation of organic compounds in an effluent by oxidizing the effluent at an elevated temperature with oxygen, the improvement which comprises effecting the oxidation at a redox potential of from about 350 to 450 millivolts, as measured with a platinum electrode against a silver-silver chloride electrode, at a pH below about 2, a temperature of from about 80° to 250° C. and under a pressure of from about 3 to 200 bars, the redox potential being maintained by a catalyst system comprising Fe 2+ and Fe 3+ .
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1, wherein the effluent is oxidized at a temperature of from about 100° to 250° C.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1, wherein the effluent is oxidized at a pressure of from about 10 to 100 bars.
Claim 5
Dependent Claim
14 words
A process as claimed in claim 1, wherein the effluent is oxidized with air.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 1, wherein the effluent is oxidized with oxygen-enriched air or with technically pure oxygen.
Claim 7
Dependent Claim
17 words
A process as claimed in claim 1, wherein the catalyst system also contains PO 4 3- -ions.
Claim 8
Dependent Claim
36 words
A process as claimed in claim 1, wherein oxidation is carried out in the presence of about 5 to 50% of already oxidized effluent preferably 10 vol.-% based on the volume of effluent to be oxidized.
Claim 9
Dependent Claim
26 words
A process as claimed in claim 7, wherein the temperature is from about 100° to 250° C., the pressure is from about 10 to 100 bars.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |