| Aqueous extraction of yellow mustard seed recovers oil in the form of oil-in-water emulsion. In this study, the ternary phase diagram of IPA, oil and water was developed to design an effective oil extraction process of oil-in-water emulsion. A 4-stage extraction process recovered 92.3% of oil from the emulsion into virtually anhydrous IPA-oil miscella. The oil and water separation and IPA usage efficiency was improved by using recycled solvent, but the oil recovery was decreased to 86.0%. The obtained IPA-oil miscella can be used directly in biodiesel production.;The use of IPA as a reactant and a co-solvent in transesterification was investigated in this study. Isopropanolysis at 1.2% KOH resulted in 54% ester content in the product. When IPA was used as a co-solvent in methanolysis, the transesterification was drastically improved. The product met the total glycerol limit of the ASTM biodiesel standard within 10 minutes, with over 99% ester content. |
