Christian writes: > >So I suddenly forced pH too low, but in the meantime, big flocks of >something like >waxes or thick creamy greasy looking things started forming in the >mixture. When >I finished the heating, and adding some NaOH solution to return to >pH 7, the remaining >liquid was a mixture of glycerin and water below (probably + soluble >salts), and >something atop which looked like very dark brown biodiesel.
The dark liquid is called "acidulated soapstock", and is almost entirely free fatty acid. (FYI -- Crude oleic acid made this way is also known as "red oil".) This is the stuff I've been playing with for a couple weeks now. You can try to esterify it to biodiesel with acid catalyst, you can throw it on the nearest dirt road to keep the dust down, you can turn it into soap, you can react it with Ca(OH)2 to form the calcium salt which you can then feed to your pigs or dairy cattle as a ruminally inert fat booster, etc, etc....Many people nowadays are frantically looking for wonderful uses for the stuff. Let us know what you find. Seriously, tho, what you're doing is great -- FFAs are basically the final effluent you have to deal with after neutralizing everything else. They're fairly strong herbicides, so you really don't want to just toss 'em in the compost with the aqueous phase. ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Stock for $4 and no minimums. FREE Money 2002. http://us.click.yahoo.com/k6cvND/n97DAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> 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/
