Tom, I did actually get about a 1/4cup of Glycerin from the method. Now that said i don't know if it was actually Glycerin or perhaps some FFA's or just plain black stuff that settled out in the acid phase. This is where I am just making the assumption that this is in fact Glycerin.
One thing that I have found is there are three types of cooking oil out there. 1) good and clean where you can use any method and get a good yield. 2) As Bob Stated below, but I would like to say that at some point there is a diminishing return when the oil gets to bad. 3) Oil that is so bad that no matter what you do, you will not like the results. This oil is better off going to the Large scale producer that converts the oil to all FFA before conversion as the stuff I worked with was just a mess. So if the oil is Black leave it at the shack. Jim Thomas Kelly wrote: >Bob, > Thanks for your response. > I have a source of WVO that titrates at 5 or more when I use .1% KOH. >It sounds like a candidate for the Foolproof Method. I hope to heat my >house/water and run my car on BD. I can use all the WVO my little town >produces. > Higher yield, no soap produced ...... somewhere over the rainbow, >huh? > > Picture #7 at JTF "The Foolproof way to make Biodiesel by Aleks Kac >Free Fatty Acid to Ester Conversion" shows "First-stage glycerine". I was >curious as to where the glycerine would come from if the acid stage only >converted fatty acids. > > I have just ordered 97% sulfuric acid. > Thanks for the tips. > Tom >----- Original Message ----- >From: "bob allen" <[EMAIL PROTECTED]> >To: <biofuel@sustainablelists.org> >Sent: Friday, September 15, 2006 4:31 PM >Subject: Re: [Biofuel] Foolproof Method > > > > >>Howdy Tom, >> >>Thomas Kelly wrote: >> >> >>>Hello All, >>> I've had success making quality BD using the single stage base >>>method. >>> I've become curious about the Foolproof Method (two stage Acid/Base) >>>for a number of reasons. I've read JTF a few times and have browsed the >>>archives. >>> Could somebody experienced with the method help with a few >>>questions? >>> >>>Part I True or False >>>The foolproof method will: >>>1. Increase yield. >>> >>> >>for feedstock withs high titration's, yes. I use the two-step >>procedure if a titration with 1% KOH uses over about 5 ml. >> >> >> >>>2. Produce little or no soap in the glycerine cocktail >>>3. Produce little or no soap to be washed out of the BD >>> >>> >>I don't see much difference in soap production, the main difference is >>in reduced amt of base required, hence lower costs. >> >> >> >>>Part II Free Response >>>Why does glycerine drop out after the first (acid) stage? >>> >>> >>I have never seen it happen. >> >> >> >> >>>As I understand it this stage involves the esterification of FFAs. There >>>is no transesterification of glycerides. >>> >>> >>acid catalyzed esterification of FFA's occurs much more rapidly than >>acid catalyzed transesterification. >> >> >> >>>Part III Just wondering: >>>1. Aleks Kac only mentions NaOH. I assume that I can use KOH instead. >>>Yes? >>> >>> >>> >>yes >> >> >> >>>2. Was there any resolution to the discussion re: concentration of H2SO4 >>>that is required? 98% preferred, 95% will work, 93% ????? Has anyone >>>succeeded with conc. as low as 90%? >>> >>> >>I only use 98% If you use lower concentrations you are introducing >>more water, the last thing you want in the reaction pot. >> >> >>In my procedure, I get it hotter (about 150 F) run it longer (a couple >>of hours minimum), don't see any glycerin at this stage even after >>waiting overnight. For the base stage I use the calculated amt of KOH >>plus enough to neutralize the sulfuric acid. and still have soap to >>deal with. >> >> >> >> >> >> >> >>-- >>------------------------------------------------------------------ >>Bob Allen,http://ozarker.org/bob >>------------------------------------------------------------------ >>----------------------------------------------------------------- >>The modern conservative is engaged in one of Man's oldest exercises >>in moral philosophy; that is, the search for a superior moral >>justification for selfishness JKG >>-------------------------------------------------------------------- >> >> >>_______________________________________________ >>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/ > > > _______________________________________________ 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/
