US2261888A - Steam turbine lubrication - Google Patents
Steam turbine lubrication Download PDFInfo
- Publication number
- US2261888A US2261888A US328147A US32814740A US2261888A US 2261888 A US2261888 A US 2261888A US 328147 A US328147 A US 328147A US 32814740 A US32814740 A US 32814740A US 2261888 A US2261888 A US 2261888A
- Authority
- US
- United States
- Prior art keywords
- oil
- corrosion
- steam turbine
- higher fatty
- highly refined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
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- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/06—Use of additives to fuels or fires for particular purposes for facilitating soot removal
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M131/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing halogen
- C10M131/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing halogen containing carbon, hydrogen, halogen and oxygen
- C10M131/12—Acids; Salts or esters thereof
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/12—Oxygen-containing compounds
- C23F11/124—Carboxylic acids
- C23F11/126—Aliphatic acids
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
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- C10L1/1824—Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms mono-hydroxy
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- C10L1/188—Carboxylic acids; metal salts thereof
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- C10L1/00—Liquid carbonaceous fuels
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- C10L1/22—Organic compounds containing nitrogen
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- C10L1/224—Amides; Imides carboxylic acid amides, imides
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
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- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
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- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/32—Wires, ropes or cables lubricants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/34—Lubricating-sealants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/36—Release agents or mold release agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/38—Conveyors or chain belts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/40—Generators or electric motors in oil or gas winning field
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/42—Flashing oils or marking oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/44—Super vacuum or supercritical use
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/50—Medical uses
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2070/00—Specific manufacturing methods for lubricant compositions
- C10N2070/02—Concentrating of additives
Definitions
- This invention relates to steam turbine lubri-' cation; and it is particularly concerned with a method of preventing the corrosion of metal parts of steam turbines lubricated by a highly refined petroleum oil containing a phenolic antioxidant, wherein a minute amount of a higher fatty acid is incorporated in said oil; and it includes as an improved steam turbine lubricating oil a highly refined paraflinic lubricating oil containing a' small amount of a phenolicoxidation inhibitor and also a minute amount, advantageously 0.02 to 0.05 per cent, of a' higher fatty acid; all as more fully hereinafter set forth and as claimed.
- moderate- 1y refined and lightly refined petroleum oils have the disadvantage of being relatively unstable in service, developing organic acidity quite rapidly,
- phenolic oxidation inhibitors are particularly suitable in'this respect. It is desir-' --able therefore to lubricate steam turbines with highly refined paraifinic oils containing small amounts of phenolic antioxidants..-
- a steam turbine oil consisting essentially of a highly refined parafiinic oil containing a small amount of a phenolic antioxidant, corrosion of metal parts of steam turbines in which such oil is used as a lubricant can be prevented and a steam turbine lubricating oil is obtained which is resistant to increase in neutralization number and steam emulsion number minum chloride refining, to remove all or substantially all of the unsaturated andnaphth enic constituents.
- An aluminum chloride refined paraifinic base oil such as a Pennsylvania oil, provides the best type of highly refined oil for the purposes of my invention, although drastically refined Mid-Continent and Gulf Coastal oils I may also be used.
- the oxidation inhibitors' which may be added to these highly refined lubricating oils for use in steam turbines are characterized by insolu-u bility in water and resistance to hydrolysis under the conditions of use. They should also be such that upon hydrolysis they do not, form compounds which are themselves acidic or corrosive.
- the water insoluble phenolic antioxidants such as beta-naphthol, p-benzyl-amino-phenol and the alkylated phenols, for example 2,6-di-tertiarybutyl-4-methyl phenol,
- the water-insoluble alkylated phenols have proved most advantageous and are customarily used; use being in amounts corresponding to about 0.2 to 0.5 per cent by weight of the oil.
- the other phenolic-inhibitors are used,
- a lubricating oil consisting essentially of a highly refined parafllnic oil and a small amount of a water-insoluble phenolic oxidation inhibitor
- the higher fatty acid' serves to prevent corrosion particularlyof the steel parts of the turbine during the early stages of 2,4,6 -tri-tertiary-butyl phenol and the like, have been found suitable.
- a highly refined paraifinic oil such as is used commercially for the lubrication of steam turbines, being an aluminum chloride refined Pennsylvania paramn base oil having a viscosity at 100 of 150 and an A. PQI. gravity of.
- a method of preventing the corrosion of metal parts of steam turbines lubricated by a highly refined parafilnic oil containing a phenolic antioxidant comprising incorporating in said lubricating oil prior to use a minute amount of a showed rust formation on its surfaces while the 5 strip which had been immersed in the highly reing in said lubricating oil a minute amount of higher fatty acid selected from the group con- I sisting of stearic acid, palmitic acid, oleic 'acid and mixtures thereof.
- a method of preventing the corrosion of' metal parts of steam turbines lubricated by a' highly refined par'afiinic oil containing a phenolic antioxidant comprising preliminarily incorporating insaid lubricatingoil 0.02 to 0.05 per cent of a higher fatty acid selected-from the group consisting of 'stearic acid, palmitic acid, oleic acid and mixtures thereof.
- An improved steam turbine qil consisting essentially of a highly refined parafiinic oil containing a phenolic antioxidant and -also 0.02 to, 0.05 per cent of a higher fatty acid.
- An improved steam turbine oil consisting essentially of a highly refined parafiinic oil containing a .phenolic antioxidant and also 0.02 to 0.05 per cent of a higher fatty acid selected from the group consisting of stearic acid, palmitic acid, oleic acid and mixtures thereof.
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Description
X Patented Nov. 4, 1941 STEAM TURBINE LUBRICATION Albert G. Rocchini, Aspinwall, Pa., assignor to Gulf Research & Development Company, Pittsburgh, Pa., a corporation of Delaware No Drawing.
Application April 5, 1940,
Serial 310,328,147 5 Claims. ((1252-56) This invention relates to steam turbine lubri-' cation; and it is particularly concerned with a method of preventing the corrosion of metal parts of steam turbines lubricated by a highly refined petroleum oil containing a phenolic antioxidant, wherein a minute amount of a higher fatty acid is incorporated in said oil; and it includes as an improved steam turbine lubricating oil a highly refined paraflinic lubricating oil containing a' small amount of a phenolicoxidation inhibitor and also a minute amount, advantageously 0.02 to 0.05 per cent, of a' higher fatty acid; all as more fully hereinafter set forth and as claimed.
In the lubrication of steam turbines, moderate- 1y refined and lightly refined petroleum oils have the disadvantage of being relatively unstable in service, developing organic acidity quite rapidly,
as evidencedeby a rise in neutralization number,
develppment of sludge. Furthermore; by incorporating in such highly refined oilscertain types of antioxidants which are resistant tosolution' in water and to hydrolysis, increase in neutralization number due to oxidation can be minimized.
I Certain of the phenolic oxidation inhibitors are particularly suitable in'this respect. It is desir-' --able therefore to lubricate steam turbines with highly refined paraifinic oils containing small amounts of phenolic antioxidants..-
However, it has been foundthat when such highly refined lubricating oils containing phenolic antioxidants are used to lubricate steam turbines, a certain amount of corrosion takes place, which isnot ordinarily encountered when the more moderately refined oils are used. This corrosion of the metal parts, particularly the steel parts, of the'turbine takes place during the early stages of the use of the oil. After the oil has been in use for a sufilcient-length of time the corrosive action stops, apparently because of a building up in the oil of some product which acts as a corrosion inhibitor.
The corrosion which takes place during the early stages of the use of a highly refined lubricating. oil in a steam turbine is 'not particularly extensive. It 'is, however, quite undesirable, because it often takes place in the governor. mechanism and very slight corrosion in this mecha: nism cuts down the clearances and throws the governor out of adjustment. It is desirable.
therefore, that even slight corrosion be prevented.
I have found that by incorporating a, minute amount of a higher fatty acid such as stearic acid, palmitic acid, oleic acid or mixtures-of these acids in a steam turbine oil consisting essentially of a highly refined parafiinic oil containing a small amount of a phenolic antioxidant, corrosion of metal parts of steam turbines in which such oil is used as a lubricant can be prevented and a steam turbine lubricating oil is obtained which is resistant to increase in neutralization number and steam emulsion number minum chloride refining, to remove all or substantially all of the unsaturated andnaphth enic constituents. An aluminum chloride refined paraifinic base oil, such as a Pennsylvania oil, provides the best type of highly refined oil for the purposes of my invention, although drastically refined Mid-Continent and Gulf Coastal oils I may also be used.
The oxidation inhibitors'which may be added to these highly refined lubricating oils for use in steam turbines are characterized by insolu-u bility in water and resistance to hydrolysis under the conditions of use. They should also be such that upon hydrolysis they do not, form compounds which are themselves acidic or corrosive. The water insoluble phenolic antioxidants such as beta-naphthol, p-benzyl-amino-phenol and the alkylated phenols, for example 2,6-di-tertiarybutyl-4-methyl phenol,
Of 'these, the water-insoluble alkylated phenols have proved most advantageous and are customarily used; use being in amounts corresponding to about 0.2 to 0.5 per cent by weight of the oil. When the other phenolic-inhibitors are used,
somewhat larger amounts are required, generally about 1.0 per cent.
According to the method of my invention, when a lubricating oil consisting essentially of a highly refined parafllnic oil and a small amount ofa water-insoluble phenolic oxidation inhibitor is to be used in a steam turbine, I preliminarily incorporate in the turbine oil a minute amount of a higher fatty acid. The higher fatty acid' serves to prevent corrosion particularlyof the steel parts of the turbine during the early stages of 2,4,6 -tri-tertiary-butyl phenol and the like, have been found suitable.
use of the oil and until the corrosion inhibiting products which form in the oil during use build up in quantity enough to prevent corrosion. The period required for building up this corrosion inhibiting property in the oil is relatively short and the amount of higher fatty acid required to be added to the oil to prevent corrosion during this period is very small. I have found that amounts of the saturatedhigher fatty acids, stearic acid or palmitic acid or mixtures of these acids, corresponding to about 0.02 to 0.05 per cent by weight of the oil are sumcient for this purpose. The unsaturated higher fatty acids such as oleic acid are also effective in these amounts but in general,
due to their unsaturated character may not be as desirable as the saturated higher fatty acids for long-time use.
The advantages of the incorporation of minute amounts of the higher fatty acids in highly refined steam turbine oils containing small amounts of phenolic oxidation inhibitors for prevention of corrosion of metal parts is illustrated in the following accelerated tests for stability against corrosion.
In these tests a highly refined paraifinic oil such as is used commercially for the lubrication of steam turbines, being an aluminum chloride refined Pennsylvania paramn base oil having a viscosity at 100 of 150 and an A. PQI. gravity of.
32.5", was used. The effect of a sample of this oil containing 0.2 per cent of 2,6-di-tertiarybutyl-4-methyl phenol on polished cold rolled steel strips in the presence of water was compared with the. effect of another sample containing 0.2
per cent of 2,6-di-tertiary-butyl-4-rnethyl phenol and 0.02 per cent of stearic acid.
for corrosion. I The steel strip which had been immersed in the.
highly refined oil containing the alkylated'phenol antioxidant but no saturated higher fatty acid fined lubricating oil containing both the alkylated phenol antioxidant and the stearic acid was clean and bright and showed no' rust, indicating the protective effect of the higher fatty acid.
Similar tests carried out at temperatures of 140 F. and in which fresh water was added to the oil daily also showed no rusting of the steel samples immersed in oils containing 0.02 per cent oleic acid and 0.02 per cent stearic acid respectively.
The invention has been described with particular reference to certain specific embodiments thereof by way of illustration and example, but it is to be understood that this invention is not limited to such embodiments except as hereinafter defined in the appended claims. 9
What I claim is: l
1. A method of preventing the corrosion of metal parts of steam turbines lubricated by a highly refined parafilnic oil containing a phenolic antioxidant, comprising incorporating in said lubricating oil prior to use a minute amount of a showed rust formation on its surfaces while the 5 strip which had been immersed in the highly reing in said lubricating oil a minute amount of higher fatty acid selected from the group con- I sisting of stearic acid, palmitic acid, oleic 'acid and mixtures thereof.
3. A method of preventing the corrosion of' metal parts of steam turbines lubricated by a' highly refined par'afiinic oil containing a phenolic antioxidant, comprising preliminarily incorporating insaid lubricatingoil 0.02 to 0.05 per cent of a higher fatty acid selected-from the group consisting of 'stearic acid, palmitic acid, oleic acid and mixtures thereof.
4. An improved steam turbine qil consisting essentially of a highly refined parafiinic oil containing a phenolic antioxidant and -also 0.02 to, 0.05 per cent of a higher fatty acid.
5. An improved steam turbine oil consisting essentially of a highly refined parafiinic oil containing a .phenolic antioxidant and also 0.02 to 0.05 per cent of a higher fatty acid selected from the group consisting of stearic acid, palmitic acid, oleic acid and mixtures thereof.
ALBERT G. aoccmm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US328147A US2261888A (en) | 1940-04-05 | 1940-04-05 | Steam turbine lubrication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US328147A US2261888A (en) | 1940-04-05 | 1940-04-05 | Steam turbine lubrication |
Publications (1)
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US2261888A true US2261888A (en) | 1941-11-04 |
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US328147A Expired - Lifetime US2261888A (en) | 1940-04-05 | 1940-04-05 | Steam turbine lubrication |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435655A (en) * | 1944-06-29 | 1948-02-10 | Standard Oil Co | Lubricant |
US2442672A (en) * | 1941-02-18 | 1948-06-01 | Shell Dev | Rust-preventive hydrocarbon compositions |
US2469469A (en) * | 1946-06-18 | 1949-05-10 | Texas Co | Oxidation inhibitors |
US2481372A (en) * | 1946-09-27 | 1949-09-06 | Shell Dev | Rust protective lubricants |
US2493213A (en) * | 1945-10-31 | 1950-01-03 | Socony Vacuum Oil Co Inc | Lubricant |
US2527889A (en) * | 1946-08-19 | 1950-10-31 | Union Oil Co | Diesel engine fuel |
US2554985A (en) * | 1948-01-03 | 1951-05-29 | Standard Francaise Petroles | Process for the protection of metals |
US2574954A (en) * | 1947-09-23 | 1951-11-13 | Tide Water Associated Oil Comp | Rust-inhibiting compositions |
DE852589C (en) * | 1949-03-22 | 1952-10-16 | Ruhrchemie Ag | Process for preventing or eliminating the emulsifiability of turbine oils |
US2672447A (en) * | 1949-08-09 | 1954-03-16 | California Research Corp | Oxidation resistant transformer oils and the like |
US2672448A (en) * | 1952-09-27 | 1954-03-16 | California Research Corp | Transformer oil containing a tertiary alkyl phenol antioxidant and a dihydroxy anthraquinone as a synergist for the antioxidant |
US5681506A (en) * | 1992-10-30 | 1997-10-28 | Castrol Limited | Corrosion inhibiting lubricant composition |
-
1940
- 1940-04-05 US US328147A patent/US2261888A/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2442672A (en) * | 1941-02-18 | 1948-06-01 | Shell Dev | Rust-preventive hydrocarbon compositions |
US2435655A (en) * | 1944-06-29 | 1948-02-10 | Standard Oil Co | Lubricant |
US2493213A (en) * | 1945-10-31 | 1950-01-03 | Socony Vacuum Oil Co Inc | Lubricant |
US2469469A (en) * | 1946-06-18 | 1949-05-10 | Texas Co | Oxidation inhibitors |
US2527889A (en) * | 1946-08-19 | 1950-10-31 | Union Oil Co | Diesel engine fuel |
US2481372A (en) * | 1946-09-27 | 1949-09-06 | Shell Dev | Rust protective lubricants |
US2574954A (en) * | 1947-09-23 | 1951-11-13 | Tide Water Associated Oil Comp | Rust-inhibiting compositions |
US2554985A (en) * | 1948-01-03 | 1951-05-29 | Standard Francaise Petroles | Process for the protection of metals |
DE852589C (en) * | 1949-03-22 | 1952-10-16 | Ruhrchemie Ag | Process for preventing or eliminating the emulsifiability of turbine oils |
US2672447A (en) * | 1949-08-09 | 1954-03-16 | California Research Corp | Oxidation resistant transformer oils and the like |
US2672448A (en) * | 1952-09-27 | 1954-03-16 | California Research Corp | Transformer oil containing a tertiary alkyl phenol antioxidant and a dihydroxy anthraquinone as a synergist for the antioxidant |
US5681506A (en) * | 1992-10-30 | 1997-10-28 | Castrol Limited | Corrosion inhibiting lubricant composition |
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