Lithium 12-hydroxystearate
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IUPAC name
Lithium 12-hydroxyoctadecanoate
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Identifiers | |
3D model (
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ChemSpider | |
ECHA InfoCard
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100.028.669 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C18H35LiO3 | |
Molar mass | 306.42 g·mol−1 |
Appearance | White powder |
Melting point | > 200 °C (392 °F; 473 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lithium 12-hydroxystearate (C18H35LiO3) is a chemical compound classified as a lithium soap. In chemistry, "soap" refers to salts of fatty acids. Lithium 12-hydroxystearate is a white solid. Lithium soaps are key component of many lubricating greases.
Use
Lithium 12-hydroxystearate exhibits high
Production
To produce lithium 12-hydroxystearate, lithium hydroxide and the fatty acid are combined in an aqueous medium. With vigorous stirring, dilute monohydrate lithium hydroxide is gradually added to a dispersion of the fatty acid in water heated to slightly below boiling.[2] Since these lithium soaps are difficult to filter, they are collected by spray drying. For applications, lithium 12-hydroxystearate is usually dispersed in synthetic oils such as silicone oil and ester oil. The synthetic oils are preferred for their greater stability and ability to perform at extreme temperatures.
The 12-hydroxystearic acid is prepared by the
References
- ^ Wietelmann, U.; Bauer, R.J. (2000). "Lithium and Lithium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH.
- ^ Maskaev, A.; Mankovskaya, N.; Lendel, I.; Fedorovskii, T.; Simurova, E.; Terenteva, V (1971). "Preparation of 12-hydroxystearic acid, the raw material for plastic greases". Chemistry and Technology of Fuels and Oils. New York: Springer.
External links
- Hughs, R (2011). "Understanding the Basics of Grease". ReliabilityWeb. Archived from the original on 2011-01-07.