Re: Paper Chromatography. Are there specific disclosure solutions for the glycerol, Esters and oil? I remember(many years ago) spraying an essentially invisible separation of esters/oil with some compound that disclosed the bands. Can't find a basic text book when you want one!! Regards Harry
--- In [EMAIL PROTECTED], "Aleksander <kac" <[EMAIL PROTECTED]> wrote: > > > > I don't really think this is true. Using 200ml methanol per liter > of WVO is > > about a 60% molar excess (that is, 60% more methanol than is > actually > > consumed in the transesterification). The excess helps to shift > equilibrium > > in the desired direction, and I think we can expect something like > 95% > > completion. > Right. Combined processes need a little less meth, but still a >50% > excess. > > When you start cheating on the methanol is when you start > > seeing more unconverted oil in the BD -- viscosity will be > measurably > > higher as a result. -K > You can observe your volumetric yield. With the right quantities of > alcohol and catalyst the 95+ % conversion will give 100 to 103% volum. > yield (measured at the same temp). The mass of the ester is actually > somewhat lower and the volume is 3% higher, which should give at > least 10% lower specific gravity (oil/fat vs. ester). > Oh, and you can determine unreacted triglycs by chromatography. > Titration isn't reliable. > > Cheers, Aleks Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
