Dear All
Can we use PVC pipe for biodiesel process production
pipeline?
Best Regards
Sty
From: Jared (RogueOP
Productions) [mailto:[EMAIL PROTECTED]
Sent: Friday, February 17, 2006
8:46 AM
To: Biofuel@sustainablelists.org
Subject: Re: [Biofuel] Trying to
produce biodiesel in laboratory scale
A while back I tried to
shake up the methoxide and oil in a closed container (due to lack of glass
blender or lab stirrer), and much like a shaken soda bottle it expanded a bit
and fizzed out a bit. I am looking for a better test setup that can
prevent this type of thing. Would stirring the mixture rather than shaking it
prevent this?
On 2/16/06, Charles
List [EMAIL PROTECTED]
wrote:
Yup
He's basically refluxing it, I assume, with the liebig condenser
vertically attached to the reaction vessel. A closed container would do the
same thing!
A good use for the liebig condenser would be to reclaim the excess
methanol from the glycerine, but they are usually pretty small, so would take a
while.
Charles List
On 17/02/2006, at 7:27 AM, Jared (RogueOP Productions) wrote:
How did you utilize the
liebig condensor? Wouldnt that condense the gas given off by the reaction into
a liquid? Is that the jist of it? Turning it into a less volitile liquid
instead of a gas?
On 2/15/06, Duarte
Nuno Januário [EMAIL PROTECTED] wrote:
Hi all!
I've been trying (made 5 batches) to produce biodiesel in a laboratory,
for educational purposes. This is what I've been doing:
-
1 liter of virgin oil from supermarket
-
200 mL of methanol
-
3,5 grams of sodium hydroxide
-
Prepared the sodium metoxide by stirring for 24 hours (magnetic
stirrer) in an closed Erlenmeyer
-
Preheated the oil to 55ºC
-
Using a flask with an attached Liebig condenser (to prevent
methanol vapors to escape), mixed vigorously for 1 hour maintaining agitation
and constant temperature (eventually drops to 52ºC when the metoxide is added)
and maybe rising to a maximum of 60ºC at some instants.
I do get a clear phase separation after 24 hours, but my biodiesel
isn't crystal clear.
When I mix a sample of the unwashed biodiesel with water and shake it,
the emulsion won't separate. It will after some hours, but with a lot of soap
formation, widespread in the container.
I'm using good reactants (not p.a. but trustworthy) and anhydrous conditions.
There one thing I should say: I never got all the sodium hydroxide to
completely dissolve in the methanol. No matter how long I keep stirring, it
simply won't dissolve quantitatively. But I do filtrate the remains of solid
hydroxide. Do you think this can be the problem? How can I solve it?
What can I be doing wrong? Why do I keep getting all this soap? Where
do you think the problem might be? In a reactant? Bad quality oil? Do you think
I should titrate the virgin oil?
Thank you all for your attention
Duarte
Nuno
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