Solvent extraction of oil from Jatropha curcas press cake using hexane as solvent

Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jewel A. Capunitan

Committee Member

Rex B. Demafelis, Amelia E. Parao

Abstract

Oil was extracted from Jatropha curcas L. press cake using hexane as solvent. The mechanical extraction yielded an oil of about 3.5665%(wt/wt). The residual oil in the cake analyzed by Soxhlet extraction, was found to contain 22.5% (wt/wt). Solvent extraction of the oil was studied by soaking the cake samples obtained after mechanical extraction in hexane. The effect of soaking time (1, 4, 8, 12, 16, 20, and 24 hours) and cake-to-solvent ratio (1:3, 1:5, 1:7, 1:9, and 1:11) on oil yield was determined and it was found out that increasing these parameters increases the oil yield. The favorable soaking time was found out to be 4 hours of soaking and the favorable cake-to-solvent ratio was 1:5. These conditions resulted to an oil yield of 19.5878%. The extracted oil was also analyzed to determine its physical characteristics. It was found out that the oil has a specific gravity of 0.8808± 0.0008 (25/25°C), an acid value of 29.1127±0.0604mg KOH/g, and a saponification number of 175.0884±3.6294 mg KOH/g. The values suggest that the oil would be a good feedstock for biodiesel production when refined.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Document Type

Thesis

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