US4079018A
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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: 1978-03-14
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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 organic ligands selected from the group consisting of unsubstituted and substituted amino derivatives of carboxylic acids and salts thereof. The quinone compound is preferably added to these compositions in order to render them 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
2026-10-23 20:00
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C02F5/12; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
71 words
A composition comprising: (a) a hydrazine compound; and (b) at least about 0.0005 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) at least one organic ligand selected from the group consisting of unsubstituted and substituted amino derivatives of carboxylic acids and salts thereof.
Claim 2
Dependent Claim
71 words
A composition comprising: (a) a hydrazine compound; and (b) at least about 0.0005 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) at least one organic ligand selected from the group consisting of unsubstituted and substituted amino derivatives of carboxylic acids and salts thereof.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said hydroxide is cobaltous hydroxide.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein said organic ligand is ethylenediamine tetraacetic acid or a salt thereof.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said hydrazine compound is hydrazine.
Claim 6
Dependent Claim
37 words
The composition of claim 1 wherein said hydrazine compound is in an aqueous solution containing about 5 to about 64 percent hydrazine compound by weight, based on the total weight of the water and the hydrazine compound.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 8
Dependent Claim
33 words
The composition of claim 6 wherein said quinone compound is selected from the group consisting of a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 9
Dependent Claim
116 words
The composition of claim 1 wherein said organometallic complex is the reaction product of said hydroxide and one or more ligands having the formula: ##STR8## wherein A is a branched or straight chain alkylene radical having 1 to about 10 carbon atoms; B is hydrogen or any suitable cation which is capable of being replaced by cobaltous or manganous ion; and R 1 and R 2 are each independently selected from the group consisting of hydrogen, an alkyl radical, an aryl radical, a radical represented by the formula: ##STR9## wherein A and B are as defined above, and a radical represented by the formula: ##STR10## wherein each of A and B is independently defined as above.
Claim 10
Dependent Claim
24 words
The composition of claim 8 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 11
Dependent Claim
11 words
The composition of claim 8 wherein said hydrazine compound is hydrazine.
Claim 12
Dependent Claim
11 words
The composition of claim 10 wherein said hydroxide is cobaltous hydroxide.
Claim 13
Dependent Claim
24 words
The composition of claim 10 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 14
Dependent Claim
65 words
The composition of claim 11 wherein, the ligand is one having the structure of Formula (I) above wherein A has 1 to 3 carbon atoms, and R 1 and R 2 are each independently selected from the group consisting of hydrogen, alkyls having 1 to 4 carbon atoms and the radicals of Formulas (II) and (III) above wherein A has 1 to 3 carbon atoms.
Claim 15
Dependent Claim
25 words
The composition of claim 13 wherein said organic ligand is selected from the group consisting of glycine, nitrilotriacetic acid, ethylenediamine tetraacetic acid, and their salts.
Claim 16
Dependent Claim
26 words
A composition as claimed in claim 14 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 17
Dependent Claim
33 words
The composition of claim 15 wherein said quinone compound is selected from the group consisting of a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 18
Dependent Claim
23 words
The composition of claim 16 wherein said organic ligand is ethylenediamine tetraacetic acid or a salt thereof and said quinone compound is methylhydroquinone.
Claim 19
Dependent Claim
26 words
The composition of claim 17 wherein about 0.002 parts to about 0.10 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 20
Dependent Claim
26 words
The composition of claim 18 wherein about 0.005 parts to about 0.02 parts by weight of the quinone compound is used per part of hydrazine compound.
Claim 21
Independent Claim
93 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) at least about 0.0005 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 amino derivatives of carboxylic acids and salts thereof.
Claim 22
Independent Claim
93 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) at least about 0.0005 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 amino derivatives of carboxylic acids and salts thereof.
Claim 23
Dependent Claim
30 words
The method of claim 20 wherein said hydrazine compound is present in at least about a stoichiometric amount based on the amount of oxygen to be removed from said environment.
Claim 24
Dependent Claim
11 words
The method of claim 20 wherein said hydroxide is cobaltous hydroxide.
Claim 25
Dependent Claim
17 words
The method of claim 20 wherein said organic ligand is ethylenediamine tetraacetic acid or a salt thereof.
Claim 26
Dependent Claim
11 words
The method of claim 20 wherein said hydrazine compound is hydrazine.
Claim 27
Dependent Claim
37 words
The method of claim 20 wherein said hydrazine compound is in an aqueous solution containing about 5 to about 64 percent hydrazine compound by weight, based on the total weight of the water and the hydrazine compound.
Claim 28
Dependent Claim
24 words
The method of claim 20 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 29
Dependent Claim
33 words
The method of claim 26 wherein said quinone compound is selected from the group consisting of a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 30
Dependent Claim
116 words
The method of claim 20 wherein said organometallic complex is the reaction product of said hydroxide and one or more ligands having the formula: ##STR11## wherein A is a branched or straight chain alkylene radical having 1 to about 10 carbon atoms; B is hydrogen or any suitable cation which is capable of being replaced by cobaltous or manganous ion; and R 1 and R 2 are each independently selected from the group consisting of hydrogen, an alkyl radical, an aryl radical, a radical represented by the formula: ##STR12## wherein A and B are as defined above, and a radical represented by the formula: ##STR13## wherein each of A and B is independently defined as above.
Claim 31
Dependent Claim
24 words
The method of claim 28 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 32
Dependent Claim
11 words
The method of claim 28 wherein said hydrazine compound is hydrazine.
Claim 33
Dependent Claim
11 words
The method of claim 30 wherein said hydroxide is cobaltous hydroxide.
Claim 34
Dependent Claim
24 words
The method of claim 30 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 35
Dependent Claim
65 words
The method of claim 31 wherein, the ligand is one having the structure of Formula (I) above wherein A has 1 to 3 carbon atoms, and R 1 and R 2 are each independently selected from the group consisting of hydrogen, alkyls having 1 to 4 carbon atoms and the radicals of Formulas (II) and (III) abvoe wherein A has 1 to 3 carbon atoms.
Claim 36
Dependent Claim
25 words
The method of claim 33 wherein said organic ligand is selected from the group consisting of glycine, nitrilotriacetic acid, ethylenediamine tetraacetic acid, and their salts.
Claim 37
Dependent Claim
24 words
A method of claim 34 which also comprises at least 0.0005 parts by weight of a quinone compound per one part of hydrazine compound.
Claim 38
Dependent Claim
33 words
A method of claim 35 wherein said quinone compound is selected from the group consisting of a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, a para-hydronaphthoquinone, a para-hydroanthraquinone, or a substituted derivative thereof.
Claim 39
Dependent Claim
23 words
The method of claim 36 wherein said organic ligand is ethylenediamine tetraacetic acid or a salt thereof and said quinone compound is methylhydroquinone.
Claim 40
Dependent Claim
26 words
The method of claim 37 wherein about 0.002 parts to about 0.10 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 41
Dependent Claim
26 words
The method of claim 38 wherein about 0.005 parts to about 0.02 parts by weight of the quinone compound is used per part of hydrazine compound.
Claim 42
Dependent Claim
30 words
The method of claim 39 wherein said hydrazine compound is present in at least about a stoichiometric amount based on the amount of oxygen to be removed from said environment.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |