Hello everyone, I have been testing Alecs two stage process with little sucess and have had problems with the glyreine not falling out.I had to add lye/methanol at three different time after the 1 stage (acid stage) in order to get the close to 20 % glycerine to fall out. I think the problems is that I am using very different WVO, I have fats which are solid still at + 25�C and fats that are floating at this temp, some are sunflower and some are rapeseed and there are also some animal fats among the ones. I know the problem might be a heating problem as I am not able to keep the 55�C for very long time (1 hour then the temp starts to fall). I still want to eliminate, investigate and clearify the problem with FFA and acid esterification of the same. I made several titrations of the latest batch and found that in order to transesterify the batch 14-16 g/lye/kg to be used (single stage process) + 20% methanol (i use as standard) The questions which occured is 1. How do you meassure the FFA % in the WVO can some one explain the process I have made it according to Journey Forever instructions, is there any other way of doing the titration? 2. What is the FFA % in the oil if the result of the titration (Journey forevere) is 15 g lye/kg fat and do you have to know what the VO in order be able to find the FFA % ? I made 4 small samples of WVO and added 1 ml/lit acid (Alecs formula), 2 ml/lit, 3 ml/lit and 4 ml/lit to the samples. After one night reaction I made a new titration of sampel 1 and 3 and the result was nearly the same for the samples 8 g/lye/kg to be used. 3. Is it possible to make a titration of oil after the acid stage in the process and are the reults reliable? 4. What happens if to much acid is added and there are no FFA to be split and is it possible to obtain reliable results from the titration under this kind of circumstances? 5. Is Alecs 1 ml/lit acid stage splitting all FFA or just the moste part of the same. 6. Can the % of acid which need to be used (splitting FFA to below 1 % in the WVO) be determined by the titration? 7. Can some one explain the reaction and suggest a way for how to proceed with as I see the problem with FFA. I have been making biodiesel since 1999 the single stage process is very familiar, but now when I have commenced to obtain different WVO`s I gave me new challanges. Thank you every one for keeping up the good work for a cleaner future and especially Keith for freely putting down the efforts ditributing information on how to do it. Best Regards from a - 8�C Finland Tomas
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