As interested as I am in the political discussion, I also have a very specific biodiesel question. In the section of J-to-F showing Aleks' acid-base method, picture 7 is labelled "first-stage glycerine" and shows a layer of glycerine under some biodiesel/oil combination. Was this a bit of "fudging" on his part, or maybe just a mislabelling? I've tried a lot of different ways to get a true TRANSesterification, with glycerine separation, using only conc. H2SO4 as a catalyst, and I've NEVER gotten it to work. Anybody out there ever had success as shown in picture 7 using only acid?
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