Original scientific paper

Synthetic Biolubricant Basestocks from Epoxidized Ricinoleic Acid: Improved Low Temperature Properties

J. Salimon ; School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43 600 Bangi, Selangor, Malaysia
N. Salih ; School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43 600 Bangi, Selangor, Malaysia
E. Yousif ; Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq

Abstract

This paper presents a series of structural modifications of epoxidized ricinoleic acid for biolubricant to improve the cold flow behavior and oxidation stability of vegetable oils through measurement of pour point (PP) and oxidation onset temperature (OT) and signal maximum temperature (SMT) of each synthetic compound. The results showed that butyl 10,12-dihydroxy-9-behenoxystearate with bulky ester behenyl mid-chain exhibited the most favorable low-temperature performance ϑ_PP=– 47 °C). On the other hand, butyl 10,12-dihydroxy-9-octyloxystearate exhibited higher oxidation stability (ϑ_OT = 221 °C) than the other synthetic esters. It was discovered that increasing chain length of the mid-chain ester had a positive influence on the low temperature properties of synthesized compounds. Improved oxidation stability is achieved when the chain length of the mid-chain ester decreases. The synthesized ester structures were confirmed by NMR and FTIR analysis.

Keywords

vegetable oils; epoxidized ricinoleic acid; chemically modified biolubricants; pour point; oxidative stability

Hrčak ID:

64591

URI

https://hrcak.srce.hr/64591

Publication date:

3.3.2011.

Article data in other languages: croatian

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