US4022712A
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Catalyzed hydrazine compound corrosion inhibiting composition containing complex of metal salt and amino derivative of carboxylic acid, and its use
Assignee: Olin Corp
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Filing: 1976-02-24
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Granted: 1977-05-10
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Expires: 1996-02-24
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 ligands comprising amino derivatives of carboxylic acids or salts. 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 22:09
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
88 words
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 cobaltous, manganous, and cupric salts; and ii. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives.
Claim 2
Dependent Claim
88 words
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 cobaltous, manganous, and cupric salts; and ii. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives.
Claim 3
Dependent Claim
36 words
The composition of claim 1 wherein said inorganic salt has the formula: MX.sub.(2/n) (I) wherein M is a cobaltous or manganous metal ion, X is an inorganic anion, and n is the charge of the anion.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said hydrazine compound is in anhydrous form.
Claim 5
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 6
Dependent Claim
26 words
The composition of claim 1 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 7
Dependent Claim
141 words
The composition of claim 5 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and one or more ligands having one of the formulas: ##STR9## wherein A is a branched or straight chain alkylene biradical having about 1 to about 10 carbon atoms; B is hydrogen or any suitable cation which is capable of being replaced by cobaltous, manganous, or cupric ion; and R 1 and R 2 are each independently selected from the group consisting of hydrogen, lower alkyls, aryls, the radical: ##STR10## wherein A and B are defined above, and the radical: ##STR11## wherein each A and B are independently selected for the groups defined for A and B respectively; and ##STR12## wherein Y is a substituted or unsubstituted ortho arylene biradical; and wherein B, R 1 and R 2 are as defined above.
Claim 8
Dependent Claim
39 words
The composition of claim 6 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 9
Dependent Claim
29 words
The composition of claim 6 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and one or more ligands represented by Formula (II) above.
Claim 10
Dependent Claim
65 words
The composition of claim 8 wherein, the ligand is one having the structure of Formula (II) 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 (III) and (IV) above wherein A has 1 to 3 carbon atoms.
Claim 11
Dependent Claim
30 words
The composition of claim 1 wherein said organic ligand for said organometallic complex is selected from the group consisting of glycine, nitrilotriacetic acid, ethylene diamine tetraacetic acid, and their salts.
Claim 12
Independent Claim
110 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 cobaltous, manganous, and cupric salts; and ii. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives.
Claim 13
Independent Claim
110 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 cobaltous, manganous, and cupric salts; and ii. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives.
Claim 14
Dependent Claim
37 words
The method of claim 10 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
13 words
The method of claim 12 wherein said hydrazine compound is in anhydrous form.
Claim 16
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 17
Dependent Claim
26 words
The method of claim 11 wherein about 0.005 parts to about 0.02 parts by weight of the organometallic complex is used per part of hydrazine compound.
Claim 18
Dependent Claim
139 words
The method of claim 5 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and one or more ligands having the formula: ##STR13## wherein A is a branched or straight chain alkylene biradical having about 1 to about 10 carbon atoms; B is hydrogen or any suitable metal ion which is capable of being replaced by cobaltous, manganous, or cupric ion; and R 1 and R 2 are each independently selected from the group consisting of hydrogen, lower alkyls, aryls, the radical: ##STR14## wherein A and B are defined above, and the radical: ##STR15## wherein each A and B are independently selected for the groups defined for A and B respectively; and ##STR16## wherein Y is a substituted or unsubstituted ortho arylene biradical; and B, R 1 and R 2 are as defined above.
Claim 19
Dependent Claim
39 words
The method of claim 16 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
29 words
The method of claim 16 wherein said organometallic complex is the reaction product of an inorganic salt as recited, and one or more ligands represented by Formula (II) above.
Claim 21
Dependent Claim
65 words
The method of claim 18 wherein the ligand is one having the structure of Formula (II) 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 (III) and (IV) above wherein A has 1 to 3 carbon atoms.
Claim 22
Dependent Claim
30 words
The method of claim 11 wherein said organic ligand for said organometallic complex is selected from the group consisting of glycine, nitrilotriacetic acid, ethylene diamine tetraacetic acid, and their salts.
Claim 23
Independent Claim
159 words
The 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; and c. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives 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.
Claim 24
Independent Claim
159 words
The 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; and c. at least one organic ligand selected from the group consisting of unsubstituted amino derivatives of carboxylic acids, substituted amino derivatives of carboxylic acids wherein the substituents are inert and salts of said unsubstituted and substituted derivatives 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.
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
30 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 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.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |