Hello Bob, yes, you are right, recovered ethanol will likely contain > 500 ppm of water. This ethanol can then possibly only be used in small portions for forward production of ethyl esters. It is however important to find out the purity of the recovered ethanol before any conclusions can be drawn. It is also likely that a big part of the water content of the biodiesel will enter the most polar phase (glycerol phase), which may make it possible to re-use the ethanol. It does not sound too thrilling to use E85 as an ethanol source. There are a number of research projects that have used gasoline-contaning ethanol, and this with production difficulties from time to time. Assuming that biodiesel from E85 is produced, the actual gasoline content would be max 15% of the esterified ethanol ,about 15% of 13-14% which makes max 2,1% in total gasoline content in the biodiesel. This amount will not influence the viscosity, nor the density severly. It is doubtful that it will effect the cetane number or the material compability properties more than marginally. However, if the ethanol is recovered, it is highly likeky to assume that some of the gasoline will enter this phase instead of staying in the biodiesel. The BD may still have an odour of gasoline though.
AGERATEC AB Jan Warnqvist ----- Original Message ----- From: "bob allen" <[EMAIL PROTECTED]> To: <Biofuel@sustainablelists.org> Sent: Thursday, January 26, 2006 5:40 PM Subject: Re: [Biofuel] ethanol method Jan, Wouldn't you expect that > 500 ppm water would be picked up in any recovered ethanol, due to even a small amount of soap production? also if the ethanol used is for automobile use, is it an E-85 blend, ie, 15% gasoline? If so I would think that the gasoline would partition into any biodiesel made from this alcohol source. How would the gasoline impact the biodiesel? Jan Warnqvist wrote: > Hello Bias Antonio, > Ken is right, the NaOH dissolves a lot quicker in ethanol if heated. In > order to make ethyl esters the quality of the reactants has to be high: > ethanol min 99,5% pure and > oil with a water content < 500 ppm and > a stochiometric surplus of ethanol of at least 75% and why not 100% ? > The economy of this is depending upon your possibilities of recover the > excess ethanol. > Good luck to you > AGERATEC AB > Jan Warnqvist > ----- Original Message ----- > From: "Ken Provost" <[EMAIL PROTECTED]> > To: <Biofuel@sustainablelists.org> > Sent: Thursday, January 26, 2006 4:55 AM > Subject: Re: [Biofuel] ethanol method > > >> On Jan 25, 2006, at 11:00 AM, Blas Antonio Guanes wrote: >> >> >>> the problem is that, methanol costs 4 $ and pure ethanol >>> for car costs 0.52 $, NaOH is gotten in any part.. KOH is >>> sold in bags of 25 kilos for soap industry.. Here in Paragua >>> it is difficult to get chemical products. for that reason I want >>> know how I can make with oil, ethanol and NaOH >> >> Have you tried dissolving NaOH in pure anhydrous ethanol? It is >> difficult. If you can dissolve the required amount (perhaps by >> boiling the ethanol/NaOH mixture under reflux), you could possibly >> make biodiesel out of very clean dry oil. If you only use 3.5g NaOH >> per liter of oil, or if your ethanol or oil contain any water, you will >> probably never achieve separation of a glycerine phase. All your >> ingredients go into a clear solution, and just stay that way forever. >> Until glycerine separates, you don't have biodiesel. >> >> -K >> >> _______________________________________________ >> 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/ > > > > -- 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/ _______________________________________________ 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/
