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US4289645A
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Hydroquinone and mu-amine compositions
Assignee: Veolia WTS USA Inc
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Filing: 1980-07-14
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Granted: 1981-09-15
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Expires: 2000-07-14
Abstract
Abstract An improved oxygen scavenger for aqueous mediums is disclosed which comprises hydrazine-free solution of hydroquinone and mu-amine. Representative examples of mu-amines include: aminomethylpropanol, triethylenetetramine, diisopropanolamine, secbutylamine, monoisopropanolamine, ethylenediamine, dimethylaminopropylamine, monoethanolamine, dimethyl(iso)propanolamine, methoxypropylamine, and diethylaminoethanol.
Inventors
- 👤 John A. Muccitelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:16
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C02; C02F; C02F1/00; C02F1/20; C23F11/12; C23F11/122
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
43 words
A composition which is useful for reducing the amount of oxygen in an oxygen containing aqueous medium, said composition consisting of hydroquinone and mu-amine, said hydroquinone and mu-amine being present in an amount sufficient to increase the oxygen scavenging efficiency of said hydroquinone.
Claim 2
Dependent Claim
43 words
A composition which is useful for reducing the amount of oxygen in an oxygen containing aqueous medium, said composition consisting of hydroquinone and mu-amine, said hydroquinone and mu-amine being present in an amount sufficient to increase the oxygen scavenging efficiency of said hydroquinone.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, which comprises a stable solution of hydroquinone and mu-amine.
Claim 4
Dependent Claim
18 words
A composition according to claim 2, wherein the ratio of hydroquinone to mu-amine is about 1:1.3 or less.
Claim 5
Dependent Claim
44 words
A composition which is useful for reducing the amount of oxygen in an oxygen containing aqueous medium, said composition consisting of water, hydroquinone and mu-amine, said hydroquinone and mu-amine being present in an amount sufficient to increase the oxygen scavenging efficiency of said hydroquinone.
Claim 6
Dependent Claim
44 words
A composition which is useful for reducing the amount of oxygen in an oxygen containing aqueous medium, said composition consisting of water, hydroquinone and mu-amine, said hydroquinone and mu-amine being present in an amount sufficient to increase the oxygen scavenging efficiency of said hydroquinone.
Claim 7
Dependent Claim
32 words
A composition according to claim 4, wherein the ratio of hydroquinone to mu-amine is about 7:1 or less and the total amount of hydroquinone in said composition is about 45% or less.
Claim 8
Dependent Claim
18 words
A composition according to claim 5, wherein said ratio of hydroquinone to mu-amine is about 7:1 to 1:99.
Claim 9
Dependent Claim
20 words
A composition according to claim 6, wherein the total amount of hydroquinone in said composition is about 7% to 45%.
Claim 10
Dependent Claim
18 words
A composition according to claim 7, wherein said ratio of hydroquinone to mu-amine is about 5:1 to 1:10.
Claim 11
Dependent Claim
11 words
A composition according to claim 8, wherein said mu-amine is methoxypropylamine.
Claim 12
Dependent Claim
11 words
A composition according to claim 8, wherein the mu-amine is aminomethylpropanol.
Claim 13
Dependent Claim
16 words
A composition according to claim 9, wherein the ratio of hydroquinone to methoxypropylamine is about 1:1.
Claim 14
Dependent Claim
18 words
A composition in accordance with claim 11 comprising about 10% hydroquinone, about 10% methoxypropylamine and about 80% water.
Claim 15
Dependent Claim
20 words
A composition according to claim 14, wherein the total amount of hydroquinone in said solution is about 10% to 20%.
Claim 16
Dependent Claim
23 words
A composition according to claim 4, 7 or 8 wherein the total amount of hydroquinone in said solution is about 5% to 30%.
Claim 17
Dependent Claim
75 words
A composition which is useful for reducing the amount of oxygen in an oxygen-containing aqueous medium comprising in combination hydroquinone and mu-amine, said composition being hydrazine free, said composition comprising an aqueous stable solution of hydroquinone and mu-amine, said mu-amine being methoxypropylamine, wherein the total amount of hydroquinone in said solution is about 7% to about 45%, and wherein a ratio of hydroquinone to mu-amine of about 5:1 to 1:10 is provided in said composition.
Claim 18
Dependent Claim
75 words
A composition which is useful for reducing the amount of oxygen in an oxygen-containing aqueous medium comprising in combination hydroquinone and mu-amine, said composition being hydrazine free, said composition comprising an aqueous stable solution of hydroquinone and mu-amine, said mu-amine being methoxypropylamine, wherein the total amount of hydroquinone in said solution is about 7% to about 45%, and wherein a ratio of hydroquinone to mu-amine of about 5:1 to 1:10 is provided in said composition.
Claim 19
Dependent Claim
73 words
A composition which is useful for reducing the amount of oxygen in an oxygen-containing aqueous medium comprising in combination hydroquinone and mu-amine, said composition being hydrazine free, said composition comprising an aqueous stable solution of hydroquinone and mu-amine, said mu-amine being methoxypropylamine, wherein the total amount of hydroquinone in said solution is about 7% to about 45%, and wherein a ratio of hydroquinone to mu-amine of about 1:1 is provided in said composition.
Claim 20
Dependent Claim
73 words
A composition which is useful for reducing the amount of oxygen in an oxygen-containing aqueous medium comprising in combination hydroquinone and mu-amine, said composition being hydrazine free, said composition comprising an aqueous stable solution of hydroquinone and mu-amine, said mu-amine being methoxypropylamine, wherein the total amount of hydroquinone in said solution is about 7% to about 45%, and wherein a ratio of hydroquinone to mu-amine of about 1:1 is provided in said composition.
Claim 21
Dependent Claim
18 words
A composition in accordance with claim 16 comprising about 10% hydroquinone, about 10% methoxypropylamine and about 80% water.
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |