US4096090A
Expired / Lapsed
US
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Catalyzed hydrazine compositions and methods of their use
Assignee: Olin Corp
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Filing: 1977-01-27
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Granted: 1978-06-20
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Expires: 1997-01-27
Abstract
Abstract Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex and preferably a quinone compound. The organometallic complex is the reaction product of a cobaltous or manganous hydroxide and one or more aromatic ligands containing at least two hydroxy functional groups, or at least one amino and one hydroxy group, in the ortho position with respect to one another. The quinone compound is preferably added to these compositions in order to render the compositions compatible with chelating phosphonate scale control agents. The use of these compositions as oxygen scavengers in corrosive environments is also described.
Inventors
- 👤 Manfred G. Noack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:17
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
76 words
A composition comprising: (a) a hydrazine compound; and (b) from about 0.0005 parts to about 0.1 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) a hydroxide selected from the group consisting of cobaltous hydroxide and manganous hydroxide; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds.
Claim 2
Dependent Claim
76 words
A composition comprising: (a) a hydrazine compound; and (b) from about 0.0005 parts to about 0.1 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) a hydroxide selected from the group consisting of cobaltous hydroxide and manganous hydroxide; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said hydroxide is cobaltous hydroxide.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said hydrazine compound is hydrazine.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein said ligand is an unsubstituted ortho-dihydroxy aromatic compound.
Claim 6
Dependent Claim
23 words
The composition of claim 1 which includes at least about 0.0005 parts by weight of a quinone compound per part of hydrazine compound.
Claim 7
Dependent Claim
49 words
The composition of claim 5 wherein said hydrazine compound is hydrazine, said organometallic complex is the reaction product of cobaltous hydroxide and an unsubstituted ortho-dihydroxy aromatic compound and said quinone compound is a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 8
Dependent Claim
12 words
The composition of claim 6 wherein said ortho-dihydroxy aromatic compound is 1,2-dihydroxybenzene.
Claim 9
Dependent Claim
11 words
The composition of claim 7 wherein said quinone compound is methylhydroquinone.
Claim 10
Dependent Claim
26 words
The composition of claim 8 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 11
Dependent Claim
26 words
The composition of claim 9 wherein about 0.005 parts to about 0.02 parts by weight of said quinone compound is used per part of hydrazine compound.
Claim 12
Dependent Claim
26 words
The composition of claim 1 wherein about 0.002 parts to about 0.1 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 13
Dependent Claim
25 words
The composition of claim 1 which includes about 0.001 parts to about 0.1 parts by weight of a quinone compound per part of hydrazine compound.
Claim 14
Dependent Claim
36 words
The composition of claim 1 wherein said hydrazine compound is in an aqueous solution containing about 5 to about 64 percent hydrazine by weight, based on the total weight of the water and the hydrazine compound.
Claim 15
Independent Claim
98 words
A method of treating a fluidic corrosive environment to remove oxygen therefrom and inhibit corrosion therein, which comprises: treating said environment with a composition comprising: (a) a hydrazine compound; and (b) from about 0.0005 parts to about 0.1 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) a hydroxide selected from the group consisting of cobaltous hydroxide and manganous hydroxide; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds.
Claim 16
Independent Claim
98 words
A method of treating a fluidic corrosive environment to remove oxygen therefrom and inhibit corrosion therein, which comprises: treating said environment with a composition comprising: (a) a hydrazine compound; and (b) from about 0.0005 parts to about 0.1 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) a hydroxide selected from the group consisting of cobaltous hydroxide and manganous hydroxide; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds.
Claim 17
Dependent Claim
11 words
The method of claim 14 wherein said hydroxide is cobaltous hydroxide.
Claim 18
Dependent Claim
11 words
The method of claim 14 wherein said hydrazine compound is hydrazine.
Claim 19
Dependent Claim
14 words
The method of claim 14 wherein said ligand is an unsubstituted ortho-dihydroxy aromatic compound.
Claim 20
Dependent Claim
23 words
The method of claim 14 which includes at least about 0.0005 parts by weight of a quinone compound per part of hydrazine compound.
Claim 21
Dependent Claim
49 words
The method of claim 18 wherein said hydrazine compound is hydrazine, said organometallic complex is the reaction product of cobaltous hydroxide and an unsubstituted ortho-dihydroxy aromatic compound and said quinone compound is a para-quinone, a para-hydrouinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 22
Dependent Claim
12 words
The method of claim 19 wherein said ortho-dihydroxy aromatic compound is 1,2-dihydroxybenzene.
Claim 23
Dependent Claim
11 words
The method of claim 20 wherein said quinone compound is methylhydroquinone.
Claim 24
Dependent Claim
26 words
The method of claim 21 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 25
Dependent Claim
26 words
The method of claim 22 wherein about 0.005 parts to about 0.02 parts by weight of said quinone compound is used per part of hydrazine compound.
Claim 26
Dependent Claim
26 words
The method of claim 14 wherein about 0.002 parts to about 0.1 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 27
Dependent Claim
25 words
The method of claim 14 which includes about 0.001 parts to about 0.1 parts by weight of a quinone compound per part of hydrazine compound.
Claim 28
Dependent Claim
36 words
The method of claim 14 wherein said hydrazine compound is in an aqueous solution containing about 5 to about 64 percent hydrazine by weight, based on the total weight of the water and the hydrazine compound.
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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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |