US4654144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the destruction of noxious gases with ozone
Assignee: Henkel Corp
•
Filing: 1986-02-03
•
Granted: 1987-03-31
•
Expires: 2006-02-03
Abstract
Abstract An improved process for the wet oxidation of malodorous gases obtained from sewage sludge drying operations is provided. Organic-enriched water having an oxygen demand of at least 5 mg per liter is utilized for the process.
Inventors
- 👤 Hubert J. Sharkey
- 👤 James A. Merritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/06; C02F11/08; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/72; C02F1/00; C02F1/72; C02F1/78; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
In a process for the deodorization of malodorous gas from a sewage sludge drying operation wherein said gas is intimately contacted with water and ozone, to eliminate both primary and secondary odors and raise the ozone breakthrough threshold, the improvement which comprises utilizing water having an oxygen demand of at least 5 milligrams per liter.
Claim 2
Dependent Claim
55 words
In a process for the deodorization of malodorous gas from a sewage sludge drying operation wherein said gas is intimately contacted with water and ozone, to eliminate both primary and secondary odors and raise the ozone breakthrough threshold, the improvement which comprises utilizing water having an oxygen demand of at least 5 milligrams per liter.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein 3 to 100 ppm ozone, based on the malodorous gas, is utilized.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein.the temperature of the malodorous gas ranges from ambient to 300° F.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein the water is effluent from a sewage treatment operation.
Claim 6
Dependent Claim
19 words
The process of claim 4 wherein the temperature of the malodorous gas ranges from 120° F to 250° F.
Claim 7
Dependent Claim
27 words
The process of claim 5 wherein 3 to 50 ppm ozone is employed and the water has an oxygen demand of 5 to 50 milligrams per liter.
Claim 8
Dependent Claim
23 words
The process of claim 6 wherein sufficient water is utilized to reduce the temperature of the exiting gas to 110° F. or below.
Claim 9
Dependent Claim
30 words
The process of claims 1, 2, 3, 4, 5, 6, or 7 which is carried out as a continuous operation and wherein the water is utilized on a once-through basis.
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 |