US4539134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and cleaning compositions for removing organic materials from metallic surfaces
Assignee: Halliburton Co
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Filing: 1982-12-02
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Granted: 1985-09-03
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Expires: 2002-12-02
Abstract
Abstract Methods and cleaning compositions are provided for more effectively removing oil, grease, paint, varnish and other organic coatings from metallic surfaces in industrial equipment, oil well tubular goods and the like. The metallic surfaces are contacted with a cleaning composition comprised of an aqueous solution of an alkaline material, a nonionic surface active agent and a wetting agent for a period of time sufficient to remove the organic materials therefrom. The nonionic surface active agent is an alkylarylpolyether alcohol having an ethylene oxide content in the range of from about 10 to about 13 units of ethylene oxide per molecule, and the wetting agent is selected from the group consisting of aromatic phosphate esters of the formulae: <IMAGE> <IMAGE> and <IMAGE> and mixtures of such phosphate esters wherein x has a value in the range of from about 4 to about 6.
Inventors
- 👤 Larry D. Martin
- 👤 Paul S. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:25
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D3/00; C11D3/16; C11D3/36; C11D3/362
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A method of removing oil, grease and other organic materials from metallic surfaces comprising: contacting said metallic surfaces for a period of time sufficient to remove the materials with an aqueous composition comprising: (a) an alkaline material selected from the group consisting of alkali metal hydroxide, ammonium hydroxide, an alkali metal carbonate, an alkali metal silicate, an alkali metal phosphate, tetrasodium EDTA and mixtures thereof; (b) a wetting agent selected from the group consisting of aromatic phosphate esters of the formulae: ##STR4## and mixtures of such phosphate esters wherein x has a value in the range of from about 4 to about 6; and, (c) a nonionic surface active agent comprising nonylphenolethoxylate havng an ethylene oxide content in the range of from about 12 to about 13 units of ethylene oxide per molecule.
Claim 2
Independent Claim
133 words
A method of removing oil, grease and other organic materials from metallic surfaces comprising: contacting said metallic surfaces for a period of time sufficient to remove the materials with an aqueous composition comprising: (a) an alkaline material selected from the group consisting of alkali metal hydroxide, ammonium hydroxide, an alkali metal carbonate, an alkali metal silicate, an alkali metal phosphate, tetrasodium EDTA and mixtures thereof; (b) a wetting agent selected from the group consisting of aromatic phosphate esters of the formulae: ##STR4## and mixtures of such phosphate esters wherein x has a value in the range of from about 4 to about 6; and, (c) a nonionic surface active agent comprising nonylphenolethoxylate havng an ethylene oxide content in the range of from about 12 to about 13 units of ethylene oxide per molecule.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein said wetting agent is a mixture of said aromatic phosphate esters and x has an average value in the range of from about 4 to 5.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein said alkaline material is present in said composition in an amount in the range from about 1% to about 5% by weight of said composition.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein said nonionic surface active agent is present in said composition in an amount in the range of from about 0.01% to about 0.1% by weight of said composition.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein said wetting agent is present in said composition in an amount in the range of from about 0.01% to about 0.1% by weight of said composition.
Claim 7
Dependent Claim
144 words
The method of claim 1 wherein said alkaline material is comprised of sodium hydroxide present in said composition in an amount in the range of from about 1% to about 3% by weight of said composition, trisodium phosphate present in said composition in an amount in the range from about 0.05% to about 1% by weight of said composition, and sodium metasilicate present in said composition in an amount in the range of from about 0.05% to about 1% by weight of said composition, the nonionic surface active agent is present in said composition in an amount of about 0.05% of said composition, and the wetting agent is a mixture of aromatic phosphate esters having the formulae: ##STR5## wherein x has an average value of about 4.6 and is present in said composition in an amount of about 0.5% by weight of said composition.
Claim 8
Dependent Claim
95 words
The method of claim 1 wherein said alkaline material is comprised of trisodium phosphate and is present in said composition in the range of from about 1% to about 2% by weight of said composition, the nonionic surface active agent is present in said composition in an amount of about 0.05% by weight of said composition, and the wetting agent is a mixture of aromatic phosphate esters of the formulae: ##STR6## wherein x has an average value of about 4.6 present in said composition in an amount of about 0.05% by weight of said composition.
Claim 9
Dependent Claim
96 words
The method of claim 1 wherein the alkaline material is tetrasodium EDTA present in said composition in an amount in the range of from about 1% to about 4% by weight of said composition, the nonionic surface active agent is present in said composition in an amount of about 0.05% by weight of said composition, and the wetting agent is a mixture of aromatic phosphate esters of the formulae: ##STR7## wherein x has an average value of about 4.6 and is present in said composition in an amount of about 0.05% by weight of said composition.
References Cited (Backward Citations)
US29540A
Cited
US28014A
Cited
US2651829A
Cited
US3010907A
Cited
US3030239A
Cited
GB1021391A
Cited
US3294693A
Cited
USRE28014E
Cited
BE650839A
Cited
US3314891A
Cited
US4139487A
Cited
USRE29540E
Cited
US3661960A
Cited
US4001133A
Cited
US4140647A
Cited
US4175051A
Cited
DE2812170A1
Cited
US4208528A
Cited
JPS5529563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
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