US4487745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oximes as oxygen scavengers
Assignee: Ashland Inc
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Filing: 1983-08-31
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Granted: 1984-12-11
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Expires: 2003-08-31
Abstract
Abstract The removal of dissolved oxygen from aqueous systems, such as steam generating systems, thereby inhibiting the corrosion of metal surfaces by adding to the system a composition in which the effective component is an oxime of the formula: ##STR1## in which R 1 and R 2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms and aryl groups.
Inventors
- 👤 Charles O. Weiss
- 👤 Dwight E. Emerich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:17
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/20; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/147
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
A composition for treating aqueous systems, such as steam generating systems, so as to remove dissolved oxygen therefrom thereby inhibiting the corrosion of metal surfaces comprising an effective amount of an oxime of the formula: ##STR3## in which R 1 and R 2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms or aryl groups.
Claim 2
Dependent Claim
63 words
A composition for treating aqueous systems, such as steam generating systems, so as to remove dissolved oxygen therefrom thereby inhibiting the corrosion of metal surfaces comprising an effective amount of an oxime of the formula: ##STR3## in which R 1 and R 2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms or aryl groups.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 in which the oxime is methylethylketoxime.
Claim 4
Dependent Claim
12 words
A composition according to claim 1 in which the oxime is acetaldoxime.
Claim 5
Dependent Claim
12 words
A composition according to claim 1 in which the oxime is butyraldoxime.
Claim 6
Dependent Claim
12 words
A composition according to claim 1 in which the oxime is propionaldoxime.
Claim 7
Independent Claim
70 words
A method of treating an aqueous system, such as a steam generating system, so as to remove dissolved oxygen therefrom thereby inhibiting the corrosion of metal surfaces, which comprises adding to said system an effective amount of an oxime of the formula: ##STR4## in which R 1 and R 2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms or aryl groups.
Claim 8
Independent Claim
70 words
A method of treating an aqueous system, such as a steam generating system, so as to remove dissolved oxygen therefrom thereby inhibiting the corrosion of metal surfaces, which comprises adding to said system an effective amount of an oxime of the formula: ##STR4## in which R 1 and R 2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms or aryl groups.
Claim 9
Dependent Claim
25 words
A method according to claim 6 in which the oxime is added in an amount equivalent to 0.1-500 ppm of aqueous system to be treated.
Claim 10
Dependent Claim
16 words
A method according to claim 7 in which the oxime is added as an aqueous solution.
Claim 11
Dependent Claim
12 words
A method according to claim 8 in which the oxime is methylethylketoxime.
Claim 12
Dependent Claim
12 words
A method according to claim 8 in which the oxime is acetaldoxime.
Claim 13
Dependent Claim
12 words
A method according to claim 8 in which the oxime is butyraldoxime.
Claim 14
Dependent Claim
12 words
A method according to claim 8 in which the oxime is propionaldoxime.
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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |