Glossary
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- Transesterification
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The name biodiesel has been given to transesterified vegetable oil to describe its use as a diesel fuel. The transesterification process involves mixing at room temperature methanol (50% excess) with NaOH (100% excess), then mixing vigorously with vegetable oil and letting the glycerol settle (about 15% of the biodiesel mix). The supernatant is biodiesel and contains a mixture of methylated fatty acids and methanol.