Sounds logical, (anyway I don«t know if the term "phase" really applies here). But it sounds unreasonable to believe the reaction taking place in the WVO/BD/MeOH layer will "have a way of knowing" if the layer og glycerin belw is 1cm, 2cm or a mile deep.
I need to go back to over my books for this one. We need "hard references" for the "displacement of the reaction how to-s". If what you point is right, then centrifugating the mixture while processing (just to gather the glycerine together) should be enough, without havin to tap it out... assuming you can afford a centrifugue. And if this principle is right, there«s another implication: In Alek«s 2 stage method, simply stopping the reaction at 3/4 vol methoxide, and adding the remaining 1/4 the day after in the same mixture (without separating the glycerin) would be OK... and this is something important because each time you separate the glyc from the BD you might be discarding the "layer in between" (unless you store these layers for further processings and then separate and gather up all the "leftovers") Am I being clear here? I think not. The point is that in the traditional 2 stage method, after the first stage you separate the glycerin and remove it, taking along with it some fine "interphase layer" of BD with it. But if the assumtion yuo mentioned is right, there«d be no need for this and you could simply reheat, proceed with stage 2 (adding the remaining 1/4 MeOH) and finishing the reaction, and so you«d avoid removing the glycerin (together with avoiding the drawback of removing the small interphase layer of BD for every syage) just to remaove the whole lot of glycerin after the last stage. Regards, Christian ----- Original Message ----- From: "Ken Provost" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Wednesday, May 01, 2002 1:01 PM Subject: Re: [biofuel] 2 stages... what if? (new method?) > I don't have any hard references on this, but I believe the precipitation > of glycerine from the biodiesel reaction as a separate phase is all that is > required to shift the equilibrium. Whether a glycerine molecule is in a > separate droplet a millimeter away, or a separate bucket six feet away, > it's basically "out of the picture". > > > 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/ > > > ______________________________________________________________________________ mensaje enviado desde http://www.iespana.es emails (pop)-paginas web (espacio ilimitado)-agenda-favoritos (bookmarks)-foros -Chat ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Stock for $4 and no minimums. FREE Money 2002. http://us.click.yahoo.com/orkH0C/n97DAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> 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/
