US4963267A
Expired / Lapsed
US
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Stabilization of manganese in aqueous systems
Assignee: ChampionX LLC
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Filing: 1990-03-26
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Granted: 1990-10-16
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Expires: 2010-03-26
Abstract
Abstract The precipitate species of manganese in the presence of an oxidative condition in the waters of an aqueous system can be diminished by treating such waters with certain amide-containing polymer.
Inventors
- 👤 John E. Hoots
- 👤 Kenneth P. Fivizzani
- 👤 Barbara E. Fair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
133 words
A method of stabilizing manganese in the waters of an aqueous system to at least diminish the formation of manganese deposits caused by oxidative condition(s) of said waters which method comprises: the addition to the waters of said aqueous system an effective amount of a water-soluble terpolymer comprised of from about 20 to about 75 mole percent of acrylic acid units, from about 10 to about 60 mole percent a acrylamide units, and from about 5 to about 70 mole percent of N-substituted acrylamide units having pendant amide functionality of the Formula I: ##STR3## wherein R 1 is hydrogen, X is sulfonate, and R is alkylene having 1 to 3 carbon atoms or phenyl or mixtures thereof, and wherein said water-soluble terpolymer has a molecular weight of from about 5,000 to about 50,000.
Claim 2
Independent Claim
133 words
A method of stabilizing manganese in the waters of an aqueous system to at least diminish the formation of manganese deposits caused by oxidative condition(s) of said waters which method comprises: the addition to the waters of said aqueous system an effective amount of a water-soluble terpolymer comprised of from about 20 to about 75 mole percent of acrylic acid units, from about 10 to about 60 mole percent a acrylamide units, and from about 5 to about 70 mole percent of N-substituted acrylamide units having pendant amide functionality of the Formula I: ##STR3## wherein R 1 is hydrogen, X is sulfonate, and R is alkylene having 1 to 3 carbon atoms or phenyl or mixtures thereof, and wherein said water-soluble terpolymer has a molecular weight of from about 5,000 to about 50,000.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said water-soluble polymer is added to said waters before said oxidative condition(s) are encountered or introduced.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said monomer units of Formula I are units of sulfomethylacrylamide, 2-sulfoethylacrylamide, or mixtures thereof.
Claim 5
Dependent Claim
39 words
The method of claim 1 wherein said water-soluble terpolymer has a mole percentage of from 5 to 50 mole percent of said N-substituted acrylamide units and from 50 to 95 mole percent of said acrylic acid and acrylamide units.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein said water-soluble terpolymer has from 5 to 30 mole percent of said N-substituted acrylamide units.
Claim 7
Dependent Claim
35 words
The method of claim 5 wherein said water-soluble polymer is a terpolymer further 9 including from 20 to 60 mole percent of acrylamide units and from 35 to 75 mole percent of acrylic acid units.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein said water-soluble terpolymer is an acrylic acid/acrylamide/sulfomethlacrylamide terpolymer.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said water-soluble terpolymer is an acrylic acid/acrylamide/2-sulfoethylacrylamide terpolymer.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein said water-soluble terpolymer is an acrylic acid/acrylamide/2-hydroxy-3-sulfopropylacrylamide terpolymer.
Claim 11
Dependent Claim
14 words
The method of claim 1 wherein said water-soluble terpolymer is an acrylic acid/acrylamide/sulfophenylacrylamide terpolymer.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein said aqueous system is an industrial aqueous system.
Claim 13
Dependent Claim
26 words
The method of claim 1 wherein said effective amount of said water-soluble terpolymer is from 0.1 to 50 ppm concentration of said terpolymer in said waters.
Claim 14
Dependent Claim
26 words
The method of claim 12 wherein said effective amount of said water-soluble terpolymer is from 1.0 to 25 ppm concentration of said terpolymer in said waters.
Claim 15
Dependent Claim
32 words
The method of claim 1 wherein said effective amount of said water-soluble terpolymer is from 0.1 to 20 ppm of said terpolymer for each ppm of soluble manganese present in said waters.
Claim 16
Dependent Claim
32 words
The method of claim 14 wherein said effective amount of said water-soluble terpolymer is from 0.5 to 10.0 ppm of said terpolymer for each ppm of soluble manganese present in said waters.
References Cited (Backward Citations)
US3709816A
Cited
US3709815A
Cited
US3790610A
Cited
US3928196A
Cited
US4283300A
Cited
US4302350A
Cited
US4428872A
Cited
US4640793A
Cited
US4536292A
Cited
US4552665A
Cited
US4584105A
Cited
US4676911A
Cited
US4711725A
Cited
US4703092A
Cited
US4604431A
Cited
US4801388A
Cited
US4752443A
Cited
US4756881A
Cited
US4869828A
Cited
JPH087489A
Cited
JPH087491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |