On Sep 9, 2006, at 11:12 AM, Rafal Szczesniak wrote: > Hi all, > > Could you tell me how can I tell the difference between emulsion > caused by unfinished process (glycerides left in the product) and > caused by soap formation (too much lye) ?
I suppose you could use gentle acidification followed by assaying the resulting FFA (soap will produce FFA, mono- and diglycerides won't). Sounds complicated. In general, soap formation is a result of too much water in the reaction, not too much lye. The concentra- tions of NaOH you're working with (even when somewhat excess- ive) are not high enough to saponify the oil itself -- in the absence of water, only the FFA originally present will form soap. -K _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
