Metathesized castor oil acylated derivatives: lubricants base stocks with low pour points and superior anti-wear properties

• Published in: SN applied sciences Vol. 1; no. 10; p. 1214
• Main Authors: Yelchuri, Vyshnavi, Azmeera, Thirupathi, Karuna, M. S. L.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.10.2019; Springer Nature B.V
• Subjects: 1. Chemistry (general); Additives; Applied and Technical Physics; Castor oil; Catalysts; Chemistry/Food Science; Earth Sciences; Energy consumption; Engineering; Environment; Epoxidation; Fatty acids; Hydroxylation; Industrial applications; Lubricants; Lubricants & lubrication; Materials Science; Methods; NMR; Nuclear magnetic resonance; Potash; Potassium; Research Article; Ricinoleic acid; Solvents; Triglycerides; Trimers; Viscosity; Wear resistance; Mumbai India; India; Antioxidants; Lubricants; Oxidation stability; Castor oil; Metathesis
• ISSN: 2523-3963; 2523-3971
• DOI: 10.1007/s42452-019-1263-0

Castor ( Ricinus communis ) oil containing ricinoleic acid 89% was self-metathesized in the presence of Grubbs’ second generation catalyst (0.025 mmol), followed by epoxidation and insitu hydroxylation using Prilezhaev dihydroxylation method to obtain hydroxylated derivatives in 93% yields. MALDI study has shown that the metathesized products comprised of a mixture of monomer, dimer and trimer metathesized products. The hydroxylated derivatives were acylated using acetic, propionic, butyric and hexanoic anhydrides in 85–90% yields. The acylated base stocks being highly branched and of high molecular weights exhibited very low pour points (− 30 to − 40 °C) and broad viscosity ranges 45.5 cSt to 60.0 cSt at 40 °C, high viscosity indices (165–191), excellent anti-wear properties (0.52–0.69 mm), good thermal and oxidative stabilities along with high load carrying capacities (165–184 kg) suitable for multi-range industrial applications. These base stocks can be used with the addition of minimum additives during the formulation.