US4026664A
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Catalyzed hydrazine compound corrosion inhibiting composition containing a quinone compound and a complex of metal salt and an ortho aromatic compound
Assignee: Olin Corp
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Filing: 1976-05-24
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Granted: 1977-05-31
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Expires: 1996-05-24
Abstract
Abstract Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex and a quinone compound. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more aromatic ligands containing at least two hydroxy or two amino functional groups, or at least one amino and one hydroxy group, in the ortho position with respect to one another. The quinone compound is one which renders the composition 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
2026-10-26 16:59
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/06; C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
101 words
A composition, comprising: (a) a hydrazine compound; (b) about 0.002 parts to about 0.04 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of cobaltous, manganous, and cupric salts; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds; and (c) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 2
Dependent Claim
101 words
A composition, comprising: (a) a hydrazine compound; (b) about 0.002 parts to about 0.04 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of cobaltous, manganous, and cupric salts; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds; and (c) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 3
Dependent Claim
37 words
The composition of claim 1 wherein said inorganic salt has the formula: MX.sub.(2/n) (I) wherein M is a cobaltous, manganous, or cupric metal ion, X is an inorganic anion, and n is the charge of the anion.
Claim 4
Dependent Claim
26 words
The composition of claim 2 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 5
Dependent Claim
32 words
The composition of claim 3 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and a mixture of unsubstituted ortho-diamino aromatic compounds and unsubstituted ortho-dihydroxy aromatic compounds.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein said hydrazine compound is in anhydrous form.
Claim 7
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 8
Dependent Claim
26 words
The composition of claim 1 wherein about 0.005 parts to about 0.02 parts by weight of the quinone compound is used per part of hydrazine compound.
Claim 9
Dependent Claim
23 words
The composition of claim 7 wherein the quinone compound is a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone, or a substituted derivative thereof.
Claim 10
Dependent Claim
39 words
The composition of claim 8 wherein said hydrazine compound is in an organic solvent solution containing about 5 to about 40 percent hydrazine compound by weight, based on the total weight of the organic solvent and the hydrazine compound.
Claim 11
Dependent Claim
20 words
The composition of claim 9 wherein said hydrazine compound is in anhydrous form and wherein the quinone compound is methylhydroquinone.
Claim 12
Independent Claim
122 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; (b) about 0.002 parts to about 0.04 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of cobaltous, manganous, and cupric salts; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds; (c) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 13
Independent Claim
122 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; (b) about 0.002 parts to about 0.04 parts by weight of an organometallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of cobaltous, manganous, and cupric salts; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and unsubstituted and substituted ortho-aminohydroxy aromatic compounds; (c) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 14
Dependent Claim
37 words
The method of claim 11 wherein said inorganic salt has the formula: MX.sub.(2/n) (I) wherein M is a cobaltous, manganous, or cupric metal ion, X is an inorganic anion, and n is the charge of the anion.
Claim 15
Dependent Claim
26 words
The method of claim 12 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 16
Dependent Claim
32 words
The method of claim 13 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and a mixture of unsubstituted ortho-diamino aromatic compounds and unsubstituted ortho-dihydroxy aromatic compounds.
Claim 17
Dependent Claim
13 words
The method of claim 11 wherein said hydrazine compound is in anhydrous form.
Claim 18
Dependent Claim
37 words
The method of claim 11 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 19
Dependent Claim
39 words
The method of claim 11 wherein said hydrazine compound is in an organic solvent solution containing about 5 to about 40 percent hydrazine compound by weight, based on the total weight of the organic solvent and the hydrazine compound.
Claim 20
Dependent Claim
26 words
The composition of claim 11 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
Dependent Claim
23 words
The composition of claim 18 wherein the quinone compound is a para-quinone, a para-hydroquinone, a para-naphthoquinone, a para-anthraquinone or a substituted derivative thereof.
Claim 22
Dependent Claim
39 words
The composition of claim 19 wherein said hydrazine compound is in an organic solvent solution containing about 5 to about 40 percent hydrazine compound by weight, based on the total weight of the organic solvent and the hydrazine compound.
Claim 23
Independent Claim
172 words
A method of treating a fluidic corrosive environment to remove oxygen therefrom and inhibit corrosion therein, which comprises: adding the following components to said environment: (a) a hydrazine compound in at least about a stoichiometric amount, based on the amount of oxygen to be removed; (b) an inorganic salt having the formula: MX.sub.(2/n) (I) wherein M is a cobaltous, manganous, or cupric metal ion, X is an inorganic ion, and n is the charge of the ion; (c) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and substituted and unsubstituted ortho-aminohydroxy aromatic compounds, and wherein about 0.1 to about 10 moles of ligand are used per gram-atom of metal ion and wherein from about 0.002 parts to about 0.04 parts by weight of total organic ligand and inorganic salt are used per part of said hydrazine compound; and (d) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 24
Independent Claim
172 words
A method of treating a fluidic corrosive environment to remove oxygen therefrom and inhibit corrosion therein, which comprises: adding the following components to said environment: (a) a hydrazine compound in at least about a stoichiometric amount, based on the amount of oxygen to be removed; (b) an inorganic salt having the formula: MX.sub.(2/n) (I) wherein M is a cobaltous, manganous, or cupric metal ion, X is an inorganic ion, and n is the charge of the ion; (c) one or more organic ligands selected from the group consisting of unsubstituted and substituted ortho-diamino aromatic compounds, unsubstituted and substituted ortho-dihydroxy aromatic compounds and substituted and unsubstituted ortho-aminohydroxy aromatic compounds, and wherein about 0.1 to about 10 moles of ligand are used per gram-atom of metal ion and wherein from about 0.002 parts to about 0.04 parts by weight of total organic ligand and inorganic salt are used per part of said hydrazine compound; and (d) about 0.001 parts to about 0.05 parts by weight of a quinone compound per part of hydrazine compound.
Claim 25
Dependent Claim
16 words
The method of claim 21 wherein each of said components are added separately to said environment.
Claim 26
Dependent Claim
22 words
The method of claim 21 wherein said organic ligand and said hydrazine compound are combined prior to being added to said environment.
Claim 27
Dependent Claim
22 words
The method of claim 21 wherein said inorganic salt and said hydrazine compound are combined prior to being added to said environment.
Claim 28
Dependent Claim
22 words
The method of claim 21 wherein said inorganic salt and said organic ligand are combined prior to being added to said environment.
Claim 29
Dependent Claim
43 words
The method of claim 21 wherein about 0.005 parts to about 0.02 parts by weight of total organic ligand and inorganic salt, and about 0.005 parts to about 0.02 parts by weight of quinone compound are used per part of said hydrazine compound.
Claim 30
Dependent Claim
16 words
The method of claim 26 wherein each of said components are added separately to said environment.
Claim 31
Dependent Claim
22 words
The method of claim 26 wherein said organic ligand and said hydrazine compound are combined prior to being added to said environment.
Claim 32
Dependent Claim
22 words
The method of claim 26 wherein said inorganic salt and said hydrazine compound are combined prior to being added to said environment.
Claim 33
Dependent Claim
22 words
The method of claim 26 wherein said inorganic salt and said organic ligand are combined prior to being added to said environment.
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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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |