Hi Mike >Hi Ken, > >Yes, it probably was pretty stupid to deacidify a lot of it, I usually do >test new things on a small scale, but it sounded fairly straightforward so >I was probably overconfident. I did stir it gently, by hand using a piece >of plastic pipe for about 4 mins, but it was difficult to tell if it was >mixed because the oil was pretty thick at room temperature. > >I'll try a half litre in a bottle - am wondering if it might be better to >warm it a little just until its liquid?
Definitely - hard to mix it well if it's not liquid enough. Just hot enough so it flows easily should be enough. Try half a litre or a litre in a PET bottle (then you can see what's happening also) and see how gently you can do it. Don't shake the bottle, turn it and tip it rather. It definitely does work, might need a bit of practice to get the hang of it. >I'd like to use the acid - base (foolproof) method, but I have not yet >managed to obtain the conc sulphuric acid. It's pretty common, any chemical supplier should do. Or ask the local school where they get their lab supplies. If you manage to get half a litre the unit price might seem high, but that'll make you 500 litres and give you time to find a cheaper bulk source. Remember you only need 95-97%, cheaper than 99%. Best wishes Keith >At 06:00 AM 13/03/2004 +0900, you wrote: > >Hello Mike, Ken > > > >Mike, if you're trying something new don't you test it first? It has > >to be done gently, it says so - if you're too rough you'll get just > >the results you did get, in your dustbin. Half a litre in a PET > >bottle would have been a much better way to start. > > > >Ken wrote: > > > > >This extravagant use of water has always plagued > > >the caustic refining process, which is why it is > > >gradually being phased out in favor of other > > >approaches. Centrifuging helps, but is generally > > > >That's why I developed this method. Usually they use the same amount > >of water as oil, and then separate it with a centrifuge, and then > >wash it... > > > >If you use only 40ml of water per litre of oil, and you do it > >CAREFULLY, that's it, no more water required, no centrifuge, no > >washing. So it's one method (along with an adaptation of Aleks's > >acid-base method) that's been recommended for use at the local level > >(villages and farms) in Thailand for making biodiesel from crude palm > >oil. > > > >But I'll echo Ken's question - why not use the acid-base method? > ><http://journeytoforever.org/biodiesel_aleksnew.html>http://journey >toforever.org/biodiesel_aleksnew.html > > > >You'll get much higher production that way, as it says in the > >Deacidifying WVO section: "It's an alternative -- better than > >straight single-stage base for oil like this [9.6ml titration], and > >while it won't get as a high a production rate as the acid-base > >method, and it uses more catalyst and gives you more co-products, > >it's very quick and simple." > > > >On the other hand, 6-7 g/litre isn't too bad, you should be able to > >get 85% production with that by single stage base, probably more. > > > >Best > > > >Keith > > > > > > >on 3/12/04 4:21 AM, mfle2001 at [EMAIL PROTECTED] wrote: > > > > > > > > > > > I had 32 litres of oil, in a plastic dustbin. > > > > I dissolved 224g of lye in 1,280 mls of water, > > > > and mixed it in to the oil. > > > > > > > > Unfortunately despite leaving it 24 hours I > > > > don't seem to have any separation of oil and > > > > soapstock - it just seems to be one horrible > > > > gluggy mass. > > > > > > > > >Try slowly pouring a liter of your mix into > > >10 liters of very hot water. Mix gently. > > >Clean oil should float to the top, where you > > >can scoop it off. You might be able to repeat > > >the process a few times with the same batch of > > >water before it gets too soapy. > > > > > >The oil you recover from this first stage will > > >probably need a second stage (all over again with > > >fresh hot water) to completely remove all the soap. > > > > > >This extravagant use of water has always plagued > > >the caustic refining process, which is why it is > > >gradually being phased out in favor of other > > >approaches. Centrifuging helps, but is generally > > >beyond the abilities and budget of the garage > > >producer. > > > > > >Why don't you try an acid esterification step > > >first, when you can't avoid using that oil? > > > > > >-K > > > > > >> > > >>Most of the WVO I get is very good and titrates at 1-2 g/litre or > > >>less, but I have one source, a fish and chip shop that is not so > > >>good it is 6-7 g/litre. > > >> > > >>As this is difficult to process with single stage I decided to try > > >>deacidifying it and followed the instructions on J to F. > > >> > > >>I had 32 litres of oil, in a plastic dustbin. I dissolved 224g of > > >>lye in 1,280 mls of water, and mixed it in to the oil. I took a > > >>sample of the mixture in a jar to watch. > > >> > > >>Unfortunately despite leaving it 24 hours I don't seem to have any > > >>separation of oil and soapstock - it just seems to be one horrible > > >>gluggy mass. Should the soapstock be more solid or a different > > >>colour or what? > > >> > > >>Do I need to heat it perhaps? > > >> > > >>Any help and advice would be appreciated. > > >> > > >>Mike > >Mike Fleetwood >Canberra, Australia. > >Worldwide email address is: [EMAIL PROTECTED] Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
