I agree with Keith that it is best to
1. Use the best quality chemicals and measure accurately.
(This will always be important, but absolutely crucial when doing small,
initial test batches.)
2. Do not attempt to use WVO (and titration) until you have succeeded
in making quality BD using virgin oil.
(That said) For isopropanol, I now use a product called Iso Heet (Red
Container; 12 fluid ounces/355ml)). It is 95% isopropanol. I get the same
titration as with 99% iso purchased through a chemical supply company. The
difference is the price. I pay about $2 (US) per 355ml vs. $8 + shipping
for 250ml from the chemical supply source. + In the US many chemical
suppliers will no longer ship to private residences.
Warning: Not all gas line anti-freeze is created equal.
I had a problem with something called Dri Gas. Although its label
only listed isopropanol, the isopropanol itself titrated 6 or 7.
Remember, start with small (1 L) test batches using virgin oil.
Best Wishes for Your Success,
Tom
- Original Message -
From: Keith Addison [EMAIL PROTECTED]
To: biofuel@sustainablelists.org
Sent: Thursday, May 03, 2007 7:17 AM
Subject: Re: [Biofuel] Titration question from a Newbie
Good Day to all,
I have a question about the purity of Isopropyl alcohol. Will 90% yield
good
results or does it have to be 99%??
Isopropanol for titration is available from chemicals suppliers.
Some people have used the other kind of Dri-Gas, which is
isopropanol, but they found that it's unreliable. Best get 99% pure
isopropanol from a chemicals supplier. 70% pure isopropanol is also
said to work, but we found it didn't give satisfactory results.
-- Make your own biodiesel The process Chemicals needed Chemicals
for WVO
http://journeytoforever.org/biodiesel_make.html
See also:
What should you do if your fuel doesn't pass the wash-test?
http://journeytoforever.org/biodiesel_vehicle.html#whatdo
Accurate measurements
http://journeytoforever.org/biodiesel_make2.html#measure
When newbies have problems making their first test batches and it
doesn't pass the quality tests it's most often because of inaccurate
measurements, or they didn't follow the instructions closely enough.
Avoid variables.
Have your test batches with new oil passed the quality tests yet?
Best
Keith
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