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Re: Possible to unreact biodiesel?
Just to get some idea,
in the last Advanced Topics class I did, the host, who demonstrated his methanol recovery still, was getting about 16 gallons of methanol out of 50 gallons of glycerine (ie he saved three batches or so of glycerine and then did recovery on it all at once) and something like 1.5 gallons of methanol out of a 50-gallon batch of biodiesel. However, whether the methanol goes into the biodiesel or into the glycerine layer seems to depend a bit on how long you let it settle for. If you're doing recovery after a short settling period you might find more methanol in the biodiesel than if you'd let it settle for a week. I'm not sure how much this number varies.
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Homebrew biodiesel crazy:
...several years with a couple of different 6.9's... now running a (gasp!)1998 GMC 6.5 van... don't shoot me.
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