As Todd said, you better start over again and do it carefully this time. Your measurements of reagents ingredients specifically Sodium Hydroxide) should be almost exact. If you are using the two-stage method, lye should be 3.5 grams.
You could probably add more Phosphoric Acid but that would be costly. regards, Chris =>-----Original Message----- =>From: Pieter Koole [mailto:[EMAIL PROTECTED] =>Sent: Friday, June 27, 2003 3:23 AM =>To: biofuel@yahoogroups.com =>Subject: [biofuel] Re:To Chris problems sep. glycerine => => =>Thank you Chris, =>But what can I do now to get "clean" glycerin ? =>I have tried it with different amounts of acid, and a slight separation is =>visible, which means that the top layer is very dark and the =>bottom layer is =>very very dark. => =>Met vriendelijke groeten, =>Pieter Koole =>Netherlands. => =>----- Original Message ----- =>From: "Christopher Tan" <[EMAIL PROTECTED]> =>To: <biofuel@yahoogroups.com> =>Sent: Thursday, June 26, 2003 2:50 PM =>Subject: RE: [biofuel] Problems sep. glycerine => => =>> Pieter, =>> =>> You might be using too much Sodium Hydroxide. That would explain why the =>> sample became very hot when you added Phosphoric Acid. Acid-base =>> neutralization is exothermic. That would also explain why you are not =>seeing =>> a clear separation of FFA. It is because the phosphoric acid that is =>> suppose to form FFA is used up in the neutralization reaction thus very =>> little FFA is produced. =>> =>> Chris =>> =>> =>-----Original Message----- =>> =>From: Ken Provost [mailto:[EMAIL PROTECTED] =>> =>Sent: Monday, June 23, 2003 6:10 AM =>> =>To: biofuel@yahoogroups.com =>> =>Subject: Re: [biofuel] Problems sep. glycerine =>> => =>> => =>> =>on 6/22/03 1:36 PM, Pieter Koole at [EMAIL PROTECTED] wrote: =>> => =>> =>> Hello, =>> =>> 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. =>> => =>> => =>> =>Wow! Pi liters! I could never measure that close... :-) =>> => =>> => =>> =>> What I see after several hours, is a top layer which =>> =>> is about ² of the sample. This top layer is slightly =>> =>> lighter in colour than the bottom layer, which is really =>> =>> dark / black. =>> => =>> =>I suspect the top layer is FFA and the bottom is glycerine. =>> =>(The FFA layer might even be sort of "reddish". It's also =>> =>known as "red oil".) =>> => =>> =>You're using way to much H2SO4. A good way to see the FFA's =>> =>clearly is to dilute a small amount (maybe 100 l) of the =>> =>glycerine layer into a liter of water, so the dark color =>> =>of the glycerine is completely lost. Then add H2SO4 just =>> =>10 ml at a time, stirring 5 minutes each time, until a =>> =>dark red layer of FFA starts separating out in globules. =>> =>Let it sit a couple hours and all the FFA will be floating =>> =>on top. Smells weird..... -K =>> => =>> => =>> => =>> =>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/ =>> => =>> => =>> =>> =>> =>> =>> 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/ =>> =>> => => => => =>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/ => => ------------------------ 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/
