interesting idea. I of course don't know if the 'precipitate' is actually a solid precipitate or a viscous liquid of some kind, or water comtaminated by something (I don' t filter the oil so there could be anything suspended in it), or what. I't s happened more than once.
mark --- In biofuel@yahoogroups.com, bob allen <[EMAIL PROTECTED]> wrote: > Hmmm, if the wvo had some calcium ion present (via extraction in the hot > oil from fish or chicken bones maybe) and you used sulfuric acid as the > catalyst, you could be precipitating out insoluble calcium sulfate, ie > gypsum. This could also use up your catalyst and stop the > esterification of the free fatty acids. This seems to be a long shot > because I can't imagine significant Calcium extraction with hot oil, but > it would explain a precipitate. > > > > Keith Addison wrote: > > > Hello Mark > > > > > >>I sometimes also get that 'salt' looking thing that Pieter is talking > >>about. Mine falls out at the end of the acid stage if I let it sit for a > >>few days. > >>mark > > > > > > Interesting. I've never let it sit for a few days though. Never > > drained it at the end of the acid stage either, but I've done quite a > > lot of acid-base tests and the test processor's HDPE, > > semi-transparent, but still, I never saw any salts there. > > > > Anyway, if it's at the end of the acid stage it's obviously not NaOH > > as Pieter suspects. > > > > Best > > > > Keith > > > > > > > >>- I can't imagine anything that would separate the > >> > >>>NaOH unless you didn't mix it thoroughly in the first place. Acid > >>>would separate it from the glycerine by-product cocktail, but it > >>>would need more acid to do that than the amount of sulphuric > >> > >>acid > >> > >>>specified, which should have been more than neutralised by > >> > >>the > >> > >>>methoxide anyway. > > > > > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Biofuels list archives: > > http://infoarchive.net/sgroup/biofuel/ > > > > Please do NOT send Unsubscribe messages to the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > Yahoo! Groups Links > > > > > > > > > > > > > > -- > ------------------------------------------------------------------ > Bob Allen,http://ozarker.org/bob > ------------------------------------------------------------------ > ----------------------------------------------------------------- > The modern conservative is engaged in one of Man's oldest exercises > in moral philosophy; that is, the search for a superior moral > justification for selfishness JKG > -------------------------------------------------------------------- > > --- > [This E-mail scanned for viruses by Declude Virus] ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
