Hi! At 18:29 24.12.05, you wrote: >Hello Vaklin > > >My personal opinion, not sure I'm right or not... > > > >+ KOH dissolves in seconds in CH3OH > >Some of it does, but it takes about 10 minutes or more to dissolve >what you'd use to make a batch. > > >o The process has not faster than one with NaOH > >No, and also it's not slower. > > >- KOH here is 3 times expensive than NaOH > >Are you sure? People have said such things but when they had a better >look they usually managed to get it for about the same unit price >(though you use more), including at least one person in East Europe.
Will give prices in BGN (native currency $1.64 = 1BGN) NaOH 0.70 BGN without VAT; KOH 2.50 BGN without VAT. Have found the place where can buy for approx 1.50 BGN, but should drive 300km. > >- You should use approximately 1.5 times (in grams) more KOH > >Why give only an approximate figure for how much catalyst to use? If >it's not accurate it's useless, or worse. You need to use 1.4 times >as much (1.4025), and you also have to adjust it for purity. For >accurate information please see: > >More about lye >http://journeytoforever.org/biodiesel_make2.html#lye I have wrote "approximately". Exactly the value is as you said. For 250 ml fresh rape oil I have used 2.5g KOH or 1.78 gram NaOH. With these values I have got excellent esterification in 1 hour and 30 minutes. Every time I'm awaiting 30 minutes more. Temperature is constant, 58 degrees Celsius. > >- Washing after KOH is more difficult. For me 4-5 washes vs. 3. > >I think most people have the opposite experience, easier washes. Maybe .. Probably they use better water than mine from kitchen pipe. > >- KOH accepts very faster H2O from the air. From this comes more > >expensive holding. > >We used NaOH for years and switched to KOH more than two years ago, >we've used a lot of it since then, we live in a humid place and we >haven't seen any difference in absorption. And you know every day real water contents? I'm sure KOH is useable too... > >- I have expected 100% esterification with KOH, but unfortunately I > >have got the same ester/glycerin ratio as with NaOH. > >Conversion never reaches 100% completion. I know, but have read some documents where in closed reactor with 70 degrees Celsius and KOH they has reached 100%. > >So KOH doesn't cover my hopes. > >But you seem to have hoped for some odd things. No, just better self value for the product. > >All this I get from few 200 ml test batches from fresh rape oil. > >Keep going, good luck. > >Best > >Keith Thank you. > >At 04:12 24.12.05, you wrote: > >>Everyone seems to use more NaOh in the process. At this point I > >>plan on using KOH even though I must use more. > >>I can purchase 90% KOH for .725/lb and NaOH beads for 51/lb. > >>The time savings and ease in mixing KOH is worth the extra cost. > >> > >>Later in the entire process am I missing something that would make > >>using KOH more complicated? > >> > >>I would be left with Pot Ash. Is there more > value to glycerine than pot ash? > >> > >>I have used NaOH so far, but want to switch when my account is finalized. > >> > >>I have been reading the archives but 58,000 messages may take a > >>while to get through. > >> > >>Currently designing my system to do 175 gallons of WVO per batch, > >>35 gallons Methanol ($2.89 gl). I have access to good supply of > >>stainless cone bottom tank for all tanks. > >> > >>John Frey > > >_______________________________________________ >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/ > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.371 / Virus Database: 267.14.7/214 - Release Date: 23.12.2005 ã. Vaklin Hristov CAR DIAGNOSE Ltd. P.O. Box 79 3320 Kozloduy Bulgaria _______________________________________________ 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/
