Hi Paul ! > Can you tell me what advantages BD made using higher alcohols (eg > isopropanol) would have over BD made using methanol or ethanol? > Longer chain alcohols seem to raise the winter properties of biodiesel: Ethyl esters are better than methyl, propyl even better, butyl esters would be ideal ... > Is isopropanol any cheaper than either methanol or ethanol? Isoprop (rubbing alcohol) is roughly the same as methanol. Ethanol is one of the most expensive alcohols, well, at least where I live. > > What are the problems to be encountered when using isopropanol? Acid based reactions work with all alcohols, base catalyzed reactions seem to be picky.
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