----- Original Message ----- >Recyling methanol from glycerine. >What does anyone have to say about pretreating the biodiesel with the >leftover weaste glycerin with the methanol still init? mix the glyc, whicvh >has meth and NAOH, then do a reaction with a corresponding lesser amount of >reactants... >anton berteaux.
>>Keep going, you're doing very well. I can tell you it works well if >>you get it right, but I'm not free to tell you any more than that. Be >>encouraged! >>Best >>Keith Addison Anton I like the idea. Results of a couple of trials. Waste glycerine from a batch of well used solidified vegetable oil (Citation). 12.5ml conc aqueous NaOH and 225ml methanol per litre used for conversion. Filtered waste cotton seed oil (FWCSO) SG 0.9136. 1/. 400ml glycerine + 100ml FWCSO reacted at 55 deg C, mixed intermittently over one hour as temp held. Settled overnight, upper layer 145ml, SG 0.8957 Retreat bottom layer with another 100ml glycerine again increased volume SG 0.9072 2/. 600ml glycerine + 600ml FWCSO treatment as above. upper layer 760ml SG 0.9058 However pH of remaining glycerol just above 7 indicating that FFA in FWCSO had neutralised NaOH and probably would have limited the extent of the reaction. Further tests required but I will certainly be using this method to recover the excess methanol. By using more than the titrated ammount of NaOH an excess will remain in the glycerol to neutralise the FFA in the FWCSO. Or thr FWCSO could be neutralised with slaked lime. High levels of NaOH favour conversion of high FFA oils and tallow. Have found that for a given methanol level the more NaOH used the lower the SG and Viscosity of the BD. However yield volume drops off. Treating the glycerine with WVO could reclaim this loss. Keith, why the secrecy?. Regards Paul Gobert. Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
