Hello to All,
Any clear oil mainly the brand name Harvest oil which is clear soy
oil, will not drop any glycerin at all.
On the boxes from one of my sources of used veg oil is a white label;
written in green letters:
Harvest
value
Clear Vegetable Oil
It is soy oil; location: US.
I have been using this WVO to make biodiesel for years. I have not had
any problems with recent batches.
Tom
- Original Message -
From: Keith Addison [EMAIL PROTECTED]
To: biofuel@sustainablelists.org
Sent: Saturday, January 31, 2009 2:08 PM
Subject: [Biofuel] Unprocessable oil?
Hello all
There was a thread a while back concerning a batch of WVO that simply
wouldn't process. I don't think the list figured out why not, and
concluded it must be something the supplier was adding to extend the
life of the oil (that was when the food prices were soaring, along
with oil prices). I think it was in the US.
Someone just wrote to me with a similar problem:
Keith, I have been making my own biodiesel for many years and the
introduction the last year or to of tbhq and the anti-foaming agent
has made it impossible for me to get anything to happen except for
the oil to just foam and form soap. Is the old way of making bio now
at and end? I know you can put it under 25 p.s.i. of pressure and it
will break, but is there and easier way to break it. I can not
believe the poison that is being put into our food chain with this
tbhq as an additive in veggie cooking oil. Thanks
I said it couldn't be due to the TBHQ (Tertiary Butyl Hydroquinone,
an anti-oxidant) and the anti-foaming agent (silicone,
dimethylpolysiloxane), they've been very common additives in
vegetable oils for much longer than the last year or two. The
question of their effect on the biodiesel process first came up at
least seven years ago, and the answer is that they have zero effect.
Many people (including us) use oils with these additives without any
difficulties.
His reply:
Any clear oil mainly the brand name Harvest oil which is clear soy
oil, will not drop any glycerin at all. When you add methanol and
your lye to the oil in the processor it just boils and a thick
plastic like scum comes to the top in about 1 minute. I have ran the
lye from 1/2 gram to 6 grams per quart of oil. At around 2 grams per
quart I get clear oil, but no glycerin or anything settles out. Is
this Normal? I have taked with home brewers from Alabama to Oklahome
to Arizona and we are all having the same problem. I can put it
under 25 p.s.i. of pressure and the process of transesterification
works like it should. I thought it was something that the cafe
owners were doing during the cleaning process, I can not get it to
make bio out of the plastic jug when it is new oil and never been
used. The only reason I e-mailed you was I do not see anything on
your web site addressing this and in the south, this problem has
only began the last 2 years. Now most all wvo suppliers have gone to
harvest oil, soy and it is clear oil. I have just been throwing it
away and have access to a lot of it but cannot get it to process in
the processor.
Not sure what he means by clear oil. (And grams per quart??)
Anyway, does anyone know about this?
Best
Keith
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