US4012195A
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US
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Catalyzed hydrazine compound corrosion inhibiting composition and use
Assignee: Olin Corp
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Filing: 1975-08-21
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Granted: 1977-03-15
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Expires: 1995-08-21
Abstract
Abstract Corrosion inhibiting compositions are described which contain a hydrazine compound and an organometallic complex. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more ortho aromatic ligands containing at least two hydroxy or two amino functional groups or at least one amino and one hydroxy group. 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
2026-11-01 05:53
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
84 words
A composition, comprising: a. a hydrazine compound; and b. about 0.002 parts to about 0.04 parts by weight of an organo metallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of salts of cobalt, manganese and copper; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted orthodiamino aromatic compounds, unsubstituted and substituted orthodihydroxy aromatic compounds and unsubstituted and substituted orthoaminohydroxy aromatic compounds.
Claim 2
Dependent Claim
84 words
A composition, comprising: a. a hydrazine compound; and b. about 0.002 parts to about 0.04 parts by weight of an organo metallic complex per part of hydrazine compound, said organometallic complex being the reaction product of: (i) an inorganic salt selected from the group consisting of salts of cobalt, manganese and copper; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted orthodiamino aromatic compounds, unsubstituted and substituted orthodihydroxy aromatic compounds and unsubstituted and substituted orthoaminohydroxy aromatic compounds.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said hydrazine compound is in anhydrous form.
Claim 4
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 5
Dependent Claim
39 words
The composition of claim 1 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 6
Dependent Claim
41 words
The composition of claim 1 wherein said inorganic salt has the formula: MX.sub.(2/n) wherein M is selected from the group consisting of cobaltous, manganous and cupric metal ions, X is an inorganic anion, and n is the charge of the anion.
Claim 7
Dependent Claim
26 words
The composition of claim 5 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 8
Dependent Claim
32 words
The composition of claim 6 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and a mixture of unsubstituted orthodiamino aromatic compounds and unsubstituted orthodihydroxy aromatic compounds.
Claim 9
Independent Claim
106 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. 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 salts of cobalt, manganese, and copper; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted orthodiamino aromatic compounds, unsubstituted and substituted orthodihydroxy aromatic compounds and unsubstituted and substituted ortho aminohydroxy aromatic compounds.
Claim 10
Independent Claim
106 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. 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 salts of cobalt, manganese, and copper; and (ii) one or more organic ligands selected from the group consisting of unsubstituted and substituted orthodiamino aromatic compounds, unsubstituted and substituted orthodihydroxy aromatic compounds and unsubstituted and substituted ortho aminohydroxy aromatic compounds.
Claim 11
Dependent Claim
13 words
The method of claim 8 wherein said hydrazine compound is in anhydrous form.
Claim 12
Dependent Claim
37 words
The method of claim 8 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 13
Dependent Claim
39 words
The method 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 14
Dependent Claim
41 words
The method of claim 8 wherein said inorganic salt has the formula: MX.sub.(2/n) wherein M is selected from the group consisting of cobaltous, manganous and cupric metal ions, 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 orthodiamino aromatic compounds are unsubstituted orthodihydroxy aromatic compounds.
Claim 17
Independent Claim
159 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) wherein M is selected from the group consisting of cobaltous, manganous or cupric metal ions, X is an inorganic ion, and n is the charge of the ion; and 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, 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.
Claim 18
Independent Claim
159 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) wherein M is selected from the group consisting of cobaltous, manganous or cupric metal ions, X is an inorganic ion, and n is the charge of the ion; and 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, 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.
Claim 19
Dependent Claim
16 words
The method of claim 15 wherein each of said components are added separately to said environment.
Claim 20
Dependent Claim
22 words
The method of claim 15 wherein said organic ligand and said hydrazine compound are combined prior to being added to said environment.
Claim 21
Dependent Claim
22 words
The method of claim 15 wherein said inorganic salt and said hydrazine compound are combined prior to being added to said environment.
Claim 22
Dependent Claim
22 words
The method of claim 15 wherein said inorganic salt and said organic ligand are combined prior to being added to said environment.
Claim 23
Dependent Claim
30 words
The method of claim 15 wherein about 0.005 parts to about 0.02 parts by weight of total organic ligand and inorganic salt are used per part of said hydrazine compound.
Claim 24
Dependent Claim
16 words
The method of claim 20 wherein each of said components are added separately to said environment.
Claim 25
Dependent Claim
22 words
The method of claim 20 wherein said organic ligand and said hydrazine compound are combined prior to being added to said environment.
Claim 26
Dependent Claim
22 words
The method of claim 20 wherein said inorganic salt and said hydrazine compound are combined prior to being added to said environment.
Claim 27
Dependent Claim
22 words
The method of claim 20 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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |