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Lubricating compositions

A technology for lubricating compositions and ionic liquids, applied in the directions of lubricating compositions, petroleum industry, etc., can solve problems such as reducing sludge accumulation or reducing coking in lubricating compositions that are not mentioned

Active Publication Date: 2012-08-01
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also no mention in this document of reducing sludge buildup or reducing coking in lubricating compositions

Method used

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  • Lubricating compositions
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-18 and comparative example A

[0071]The turbine engine oils of Examples 1-18 and Comparative Example A were prepared by blending the base oils and additives shown in Tables 1-3 below.

[0072] The amounts in Tables 1-3 are expressed in wt% based on the total weight of the fully formulated formulation.

[0073] The base oil used in the formulations of Tables 1-3 was a 5 cSt pentaerythritol ester, further containing tricresyl phosphate anti-wear additives, tolyltriazole preservatives, dicarboxylic acid preservatives, dioctyl diphenylamine (DODPA) and Aryldiphenylamine as diphenylamine (DPA) antioxidant component, p-tert-octylphenyl-α-naphthylamine as phenyl-α-naphthalene (PANA) antioxidant component, and polysiloxane defoamer. The viscosity of pentaerythritol ester at 100°C is 5mm 2 / s, and the maximum viscosity at -40°C is 13,000mm 2 / s. Additionally, pentaerythritol esters have a maximum pour point of -54°C and a minimum flash point of 246°C.

[0074] Table 1

[0075]

Comparative example...

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Abstract

A lubricating composition comprising: (i) from 50% to 99% by weight of base oil; (ii) from 0.01% to 5% by weight of ionic liquid; and (iii) from 0.01% to 10% by weight of additive; wherein the lubricating composition has a pour point of at most -54 DEG C, a flashpoint of at least 246 DEG C and a kinematic viscosity at 100 DEG C in the range of from 4.9 to 5.4 mm2 / s. The lubricating compositions according to the present invention are suitable for use in turbine engine oils and are useful for reducing the build up of sludge and for reducing coking in the lubricating composition.

Description

technical field [0001] This invention relates to lubricating compositions, and more particularly to lubricating compositions useful as aircraft turbine engine oils. Background technique [0002] Aviation turbine engine oils (TEOs) need to exhibit excellent performance over a wide temperature range to meet military and civilian product specifications for these products, namely MIL-PRF-23699 and SAE-AS-5780, respectively. Specifically, both specifications state that an approved product must meet certain viscosity, pour point and flash point requirements. [0003] With the development of modern turbine engines, aviation turbine engine oils are exposed to increasingly aggressive environments, including intense thermal and oxidative stress. This can lead to undesirable consequences for turbine engine oils, particularly unacceptable sludge buildup and unacceptable levels of coking in the oil system. Coke is generally thought of as a carbonaceous deposit that forms on engine surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M171/02
CPCC10M2219/042C10M2223/06C10M2207/2835C10M2211/044C10N2230/04C10M2219/04C10N2240/12C10M2219/044C10M2201/082C10M2201/081C10M2219/00C10M2223/043C10M2219/104C10M2227/063C10M2215/226C10M2215/221C10M2201/084C10M169/04C10M2201/087C10M2215/02C10N2230/08C10M2215/16C10M2223/00C10N2220/04C10M171/02C10M2227/00C10M2215/223C10M2215/224C10N2240/14C10M2201/085C10M2215/225C10M2215/14C10N2020/077C10N2030/04C10N2030/08C10N2040/12C10N2040/135
Inventor C·S·特里德盖特
Owner SHELL INT RES MAATSCHAPPIJ BV
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