yews, thanks craig.
On to the actual sbject: ibought a nice SS vacuum vessel, and want to do all
sorts of neat things with it, includung pressure and gheat for the BD
process, and also for the glycerin pretreat...
I'll keep you posted, but iam way too busy so don't hold your breath (s)
anton
-Original Message-
From: craig reece [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 12, 2001 5:10 PM
To: biofuel@yahoogroups.com
Subject: [biofuel] Glycerine pretreat (was Why people like SUVs
Paul,
Just a suggestion - change the subject line. What you posted - the
(valuable)
results of your glycerin experiments - had nothing to do with Why People
Like
SUVs.
For those of us that are on multiple Yahoo groups, deciding which threads to
read and which to discard without reading is made more difficult by the fact
that a new thread will start (as this one has) within a thread with a
totally
different subject matter. Netscape allows me to eliminate the entire thread
with two keystrokes - but if I have to look at every post in even those
threads
that I have no interest in it's unnecessary time on my part.
And - I've done it too.
Thanks,
Craig
Paul Gobert wrote:
> - Original Message -
> >Recyling methanol from glycerine.
> >What does anyone have to say about pretreating the biodiesel with the
> >leftover weaste glycerin with the methanol still init? mix the glyc,
whicvh
> >has meth and NAOH, then do a reaction with a corresponding lesser amount
of
> >reactants...
> >anton berteaux.
>
> >>Keep going, you're doing very well. I can tell you it works well if
> >>you get it right, but I'm not free to tell you any more than that. Be
> >>encouraged!
> >>Best
> >>Keith Addison
>
> Anton I like the idea. Results of a couple of trials.
>
> Waste glycerine from a batch of well used solidified vegetable oil
> (Citation).
> 12.5ml conc aqueous NaOH and 225ml methanol per litre used for conversion.
> Filtered waste cotton seed oil (FWCSO) SG 0.9136.
>
> 1/. 400ml glycerine + 100ml FWCSO
>reacted at 55 deg C, mixed intermittently over one hour as temp held.
> Settled overnight, upper layer 145ml, SG 0.8957
> Retreat bottom layer with another 100ml glycerine
> again increased volume SG 0.9072
>
> 2/. 600ml glycerine + 600ml FWCSO
> treatment as above.
> upper layer 760ml SG 0.9058
> However pH of remaining glycerol just above 7 indicating that FFA in FWCSO
> had neutralised NaOH and probably would have limited the extent of the
> reaction.
>
> Further tests required but I will certainly be using this method to
recover
> the excess methanol.
> By using more than the titrated ammount of NaOH an excess will remain in
the
> glycerol to neutralise the FFA in the FWCSO. Or thr FWCSO could be
> neutralised with slaked lime. High levels of NaOH favour conversion of
high
> FFA oils and tallow. Have found that for a given methanol level the more
> NaOH used the lower the SG and Viscosity of the BD. However yield volume
> drops off. Treating the glycerine with WVO could reclaim this loss.
>
> Keith, why the secrecy?.
>
> Regards Paul Gobert.
>
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