no that is not so, the best methoxide could be made by addition of sodium metal to anhydrous methanol. the more water in the system, the more soap formation, and the poorer the yield.
Andres Secco wrote: > Dear Tom, > The only way to KOH or NaOH to activate the Methanol is acting as a > strong base. Without some water in the system it doesn´t work. > > ----- Original Message ----- > *From:* Tom Irwin <mailto:[EMAIL PROTECTED]> > *To:* Biofuel@sustainablelists.org > <mailto:Biofuel@sustainablelists.org> > *Sent:* Thursday, February 16, 2006 4:54 AM > *Subject:* Re: [Biofuel] Trying to produce biodiesel in laboratory scale > > Andres, > > Doesn´t the water poison the catalyst and give you saponification > reactions? > > > ------------------------------------------------------------------------ > *From:* Andres Secco [mailto:[EMAIL PROTECTED] > *To:* Biofuel@sustainablelists.org > <mailto:Biofuel@sustainablelists.org> > *Sent:* Thu, 16 Feb 2006 00:37:16 -0300 > *Subject:* Re: [Biofuel] Trying to produce biodiesel in > laboratory scale > > Dear Duarte, > The basic reaction you are doing is a nucleophilic reaction were > the methoxide replaces the glycerine in the fatty acid. So you > get free methylstearates (if the oil have stearic acid). This > substances called methyl-Stearates or Linoleates are the Biodiesel. > Now, I have some questions > What kind of methanol do you use, absolut? Try using a 96% > instead and add some water to it 20 ml. It must be ready for use > in 1 hour and is far less toxic than the absolut. > What I see is the following. The non reacted glicerine still > have some unreacted portions which act as emulsifiers and do > emusify some polar phase in the biodiesel. > Once you separate the upper phase add more methoxide and > separate again. Must be much clearer. > Try rinsing with alkaline water too. > > snip > > ------------------------------------------------------------------------ > > _______________________________________________ > 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/ > > ------------------------------------------------------------------------ > Visita *www.tutopia.com > <http://www.tutopia.com/bannerserving/banman.asp?ZoneID=0&BannerID=3174&AdvertiserID=776&CampaignID=2424&Task=Click&Mode=TEXT>* > > y comienza a navegar más rápido en Internet.*Tutopia* es Internet para > todos. Web Bug from > http://www.tutopia.com/bannerserving/banman.asp?ZoneID=0&BannerID=3494&AdvertiserID=776&CampaignID=2739&Task=Get&Mode=TEXT > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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/ > -- Bob Allen http://ozarker.org/bob "Science is what we have learned about how to keep from fooling ourselves" — Richard Feynman _______________________________________________ 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/
