Hello everyone again, Yesterday a person I know, gave me 1000 liters of out of validation virgin oil. I'm thinking making biodiesel with it so I don't see a problem with using it. I did a titration using fenolftalein just like I did for passed batches, but this time I spended 5 ml of NaOH instead of the usual 1,0 - 1,5 for OVU titration (STRANGE). My short experience tells me that is something wrong with this oil, maybe too much FFA's formed with oxidation since this oil was stored for a long time. By my calculations, in a mini-batch of 500 mL of this oil is necessary 4.250g of NaOH. OK, so I did it. I put 500 mL of oil plus 100 mL of ethanol with pre- mixed 4.250g of NaOH in a erlenmeyer baloon with agitation and temperature control (55ºC) The reaction went very well with beautifull colors. After 2 hours I stop heating and agitating and I let it setlle. The separation was spectacular, in 15 minutes I've got almost colorless biodiesel in top and dark brown Glycerin and FFA's in the bottom. So far so good. I've notice that the quantity of glycerin and FFA's was excessive (about 180 mL) usually it's 80 mL in a 500 mL of oil batch. So I think, OK this oil got a lot of FFA's that's why I've got a larger volume of the heavy fase. When I tried to wash the biodiesel with tap water, it formed a white emulsion. I've waited a long time but there was no separation, absolutely nothing. What happened?????? What am I doing wrong???? Can I make biodiesel with this oil?
Sorry about my english.... Thanks a lot Filipe Paulette __________________________________________________________ Porque insiste em pagar o dobro? Compare o preço da sua ligação à Internet http://acesso.portugalmail.pt/maisbarato _______________________________________________ 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/
