Hello Jeffery, the clear phase at the bottom is likely unreacted oil. It seems likely that your oil has contaminations which inhibit the trans-esterification reaction. Do not change your recipe at first hand, get yourself a little oil that you know is OK, maybe from the supermarket and try your recipe on that one by following the instructions on YTF including the titration. When settled and washed go through the methanol extraction method again and compare the results. Get back to me and report. Add the recipe that you are working with too. Best regards Jan Warnqvist AGERATEC AB
[EMAIL PROTECTED] + 46 554 201 89 +46 70 499 38 45 ----- Original Message ----- From: "Jeffrey Tan" <[EMAIL PROTECTED]> To: <Biofuel@sustainablelists.org> Sent: Friday, August 12, 2005 11:52 AM Subject: Re: [Biofuel] Quality Test > Jan, > Thanks for the tip. We tried it and without stirring, there were clear > yellow deposit on the bottom. The biodiesel did not disolve fully in the > methanol like you said. So does this mean the next time I do another batch, > I have to increase the methanol to the sodium? Any suggestion? > > Jeff > > >From: "Jan Warnqvist" <[EMAIL PROTECTED]> > >Reply-To: Biofuel@sustainablelists.org > >To: <Biofuel@sustainablelists.org> > >Subject: Re: [Biofuel] Quality Test > >Date: Thu, 11 Aug 2005 18:51:02 +0200 > > > >Hello Jeffery. > >The test method that you are using seems to me highly dubious, since there > >are a number of pre-assumptions that has to be met. > >For a further check I´d suggest this: > >Take exactly 25 ml of biodiesel and dissolve it in exactly 225 ml of > >methanol in a measuring glass. Now: > >The biodiesel should be fully soluble in the methanol forming a clear > >bright > >phase. If not, there is pollution in the biodiesel causing you trouble with > >the water test. Each ml of undissolved material is corresponding to 4% by > >volume. Are there any undissolved material at the bottom of the measuring > >glass ? > >If there is, your reaction is not complete and this is causing you trouble > >with the water test. > >This method does not cover every aspect of quality, but it gives a hint > >though........ > >Good luck to you > >Jan Warnqvist > >AGERATEC AB > > > >[EMAIL PROTECTED] > > > >+ 46 554 201 89 > >+46 70 499 38 45 > >----- Original Message ----- > >From: "Jeffrey Tan" <[EMAIL PROTECTED]> > >To: <Biofuel@sustainablelists.org> > >Sent: Thursday, August 11, 2005 2:19 PM > >Subject: [Biofuel] Quality Test > > > > > > > Hello all. Need some explanation and advise here on my experiments > >please. > > > > > > I have been using virgin cooking palm oil for the experiments. When > > > following the steps for checking on quality, I put in 150ml of de > >ionised > > > battery water and 150ml of the biodiesel obtained but the end result was > > > clear yellowish liquid on top and white emulsion like on the bottom. I > >have > > > done 3 different batches with the same result. My further reading and > >guess > > > is either the NaOH is too much/little or the methanol is too > >much/little. > > > My next step will probably to increase the methanol from 200ml to 400ml > >(my > > > batches are in 1 liter of new oil). Any comments or suggestions from > >the > > > gurus out there? > > > > > > Can I continue with the bubble washing process with the above 3 test > > > batches? > > > > > > Jeff > > > > > > _________________________________________________________________ > > > Express yourself instantly with MSN Messenger! Download today - it's > >FREE! > > > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > > > > > > > > > _______________________________________________ > > > 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/ > > > > > > > > > > > > > >_______________________________________________ > >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/ > > > > _________________________________________________________________ > Express yourself instantly with MSN Messenger! Download today - it's FREE! > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > > > _______________________________________________ > 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/ > > _______________________________________________ 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/
