Optimization via response surface methods of solvent extraction with agitation of Jatropha curcas L. oil using hexane as solvent

Date

4-2010

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Monet Concepcion C. Maguyon

Committee Member

Rex B. Demafelis, Butch G. Bataller, Jovita L. Movillon

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Abstract

Solvent extraction with agitation of Jatropha curcas L. oil was performed using hexane as solvent. Using soxhlet extraction, the maximum extractable oil from Jatropha seed was determined. The relationship of both agitation time and kernel-to-solvent ratio with the oil recovery was analyzed. Extraction cost per gram of oil extracted and oil recovery were used as determinants of the optimum conditions. The physical properties of oil that was extracted using the optimum conditions were characterized and were compared with its literature values. The maximum extractable oil from Jatropha seed is 52.42% (w/w). During extraction, the oil recovery increases as the agitation time becomes longer. On the other hand, the oil recovery decreases as the kernel-to-solvent ratio increases. The optimum conditions were based on the method that considered extraction cost per gram of oil extracted. The resulting optimum time and kernel-to-solvent ratio is one hour and 0.05 respectively. The oil recovery and extraction cost per gram oil that were obtained using the optimum conditions are 83.27% and Php26.87 per gram of oil extracted. Analyses about the characteristics of the extracted oil under optimum conditions show that the extracted oil’s physical characteristics are within the range of the literature values of Jatropha oil. Its specific gravity, acid value and saponification number is 0.9058, 11.4043 mg KOH/g and 175.9056 mg KOH/g respectively. The iodine value of the extracted oil was analyzed by the Food Science Cluster of College of Agriculture, UPLB and it has a value of 100.4148 g of iodine absorbed per 100g of sample.

Language

English

Location

UPLB Main Library Special Collections Section

Document Type

Thesis

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