US3754376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inert gas stripping of contaminated water
Assignee: Texaco Inc
•
Filing: 1972-02-01
•
Granted: 1973-08-28
•
Expires: 1992-02-01
Abstract
Abstract Water containing contaminating gases such as hydrogen sulfide, carbon dioxide and ammonia is freed of these contaminants by closed system stripping process which employs an inert gas and steam.
Inventors
- 👤 R Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/20; B; B01; B01D; B01D19/00; B01D19/0005; C02F1/58; C02F1/586; C02F2101/00; C02F2101/10; C02F2101/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
A process as in claim 1 wherein the amount of steam relative to the total of steam and inert gas is from about 10 mole percent to about 85 mole percent.
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein the inert gas is nitrogen.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the water contaminants include hydrogen sulfide and ammonia.
Claim 4
Dependent Claim
39 words
A process for removing gaseous contaminants from water which comprises stripping the gaseous contaminants from the water with steam and inert gas, said inert gas flowing in a closed path wherein the inert gas is continuously reused for stripping.
Claim 5
Dependent Claim
30 words
The process of claim 5 wherein the amount of steam relative to the total of steam and inert gas is from about 10 mole percent to about 85 mole percent.
Claim 6
Dependent Claim
11 words
The process of claim 6 wherein the inert gas is nitrogen.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the contaminants include hydrogen sulfide and ammonia.
Claim 8
Dependent Claim
38 words
The process of claim 5 wherein the inert gas is freed of the contaminants picked up in the stripping process by contacting the inert gas and contaminants with a solvent system which will selectively dissolve only the contaminants.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |