| 摘要 |
A process is described for producing fatty acid alkyl esters for both diesel fuel and non-fuel uses. The feed material includes whole oleaginous seeds slurried in a liquid triglyceride oil containing at least two weight percent free fatty acid, wherein oil from inside the seeds is first extracted with concurrent esterification of free fatty acids from all sources in an acidic environment. Following sufficient free fatty acid reaction, the intermediate product is subjected to base-catalyzed concurrent extraction and transesterification. Decanting of the byproduct glycerin is followed by water washing. Subsequently, the fatty acid ester product is concurrently purified and fractionated into a biodiesel fuel stream and a non-fuel fraction, each of which undergoes post treatment as needed. The process is optionally integrated with glycerin purification and/or methanol recovery.
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