US4525283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the decontamination of effluents
Assignee: Bayer AG
•
Filing: 1983-07-21
•
Granted: 1985-06-25
•
Expires: 2003-07-21
Abstract
Abstract A process for the decontamination of an effluent loaded with organic substances, which effluent has, where appropriate after the addition of a redox system, a redox potential of 300-600 mv measured at a platinum electrode versus a silver/silver chloride electrode, comprising oxidizing the effluent with oxygen or an oxygen-containing gas at a pH of 1 to 4, a temperature of 50° to 200° C. and a pressure of 1 to 60 bar in the presence of a redox catalyst and a co-catalyst comprising coal, lignite or peat which has been pretreated with alkali.
Inventors
- 👤 Otto Horak
- 👤 Werner Falkenberg
- 👤 Rolf Muders
- 👤 Werner Beinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/06; C02F11/08; C02F1/00; C02F1/72; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A process for the decontamination of an effluent loaded with organic substances, which effluent has, where appropriate after the addition of a redox system, a redox potential of 300-600 mv measured at a platinum electrode versus a silver/silver chloride electrode, comprising oxidizing the effluent with oxygen or an oxygen-containing gas at a pH of 1 to 4, a temperature of 50° to 200° C. and a pressure of 1 to 60 bar in the presence of a redox catalyst and a co-catalyst comprising coal, lignite or peat which has been pretreated with alkali.
Claim 2
Dependent Claim
93 words
A process for the decontamination of an effluent loaded with organic substances, which effluent has, where appropriate after the addition of a redox system, a redox potential of 300-600 mv measured at a platinum electrode versus a silver/silver chloride electrode, comprising oxidizing the effluent with oxygen or an oxygen-containing gas at a pH of 1 to 4, a temperature of 50° to 200° C. and a pressure of 1 to 60 bar in the presence of a redox catalyst and a co-catalyst comprising coal, lignite or peat which has been pretreated with alkali.
Claim 3
Dependent Claim
16 words
Process according to claim 1, characterised in that the oxidation is carried out at 100°-180° C.
Claim 4
Dependent Claim
16 words
Process according to claim 1, characterised in that the oxidation is carried out at pH 1.5-2.5.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |