Pieter, Me too, I've been experimenting with seperating FFA and glyc. Based on my experience, I contribute your problems to the use of sulphuric acid in stead of phosphoric acid. The reaction of sulphuric is that much stronger that it not only will enable separation, but also makes sulpuric compounds out of the FFA and glyc. (which are poisonous) This is the main reason of the dark FFA and glyc., they are 'chemically burned'
Possibility: use much less H2SO4 (few ml per liter byproduct), and wait sufficient time to separate (days). regards, Filip (eveneens vriendelijke groeten) >Hai Paul, >If that is the case, the whole top layer would be glycerin ? >The color though, is still very dark. I saw a picture on the internet. There >were two jars and a bright separation was visible. >OkŽ, I can measure the specific grafity, may that tells me a bit more, but I >still don't know how to get rid of the dark color. It doesn't look very >attractive to sell it to people > >Met vriendelijke groeten, >Pieter Koole >Struiken 3 >5993 NA Maasbree >077 - 465 1533 >06 - 1339 1428 >[EMAIL PROTECTED] ----- Original Message ----- From: "gobie" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Wednesday, June 25, 2003 3:27 PM Subject: Re: [biofuel] Problems sep. glycerine > > ----- Original Message ----- > From: "Pieter Koole" <[EMAIL PROTECTED]> > > > > I am still trying to separate glycerin and FFA's, but it does not work. > > Now I used ¸ liter of the bottom layer ( from the very bottom of the > > vessel ) and ¸ liter ( not ¸ ml. but ¸ liter ! ) sulphuric acid ( 98% ) > and > > all that happens : no separation. > <snip> > > Pieter, I think you mentioned earlier that the oil you are using is only > used for one day. The acidity should be very low. Perhaps the FFA's aren't > separating because there isn't much there. > ( excuse me if I am thinking of the wrong feedstock). > Regards, Paul Gobert. > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Get A Free Psychic Reading! Your Online Answer To Life's Important Questions. http://us.click.yahoo.com/Lj3uPC/Me7FAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ 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/
