made my first test batch, opinions please (pic) - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 01-03-2008, 02:35 AM Thread Starter
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made my first test batch, opinions please (pic)

I made my first 1 liter test batch of bioDiesel following the "dr. pepper" method found here:
http://www.biodieselcommunity.org/makingasmallbatch/

I then washed it using the following "dr. pepper method outlined here:
http://www.biodieselcommunity.org/washingasmallbatch/

All of the other pics I have seen of washed bioD are clear. why is mine cloudy? also what is the white stuff at the very bottom? is that soap? is it normal?
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post #2 of 10 (permalink) Old 01-04-2008, 03:26 PM
 
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I thought a byproduct form bio-D is soap????
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post #3 of 10 (permalink) Old 01-06-2008, 03:48 AM
 
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yeah, that's how it is supposed to look, that is soap, and that is not an unusual amount, how long did it take to seperate after you washed it, that will tell how well the reaction went down? how long have you let it dry before taking this photo, it will clear after a while of sitting and letting the water evaporate. I don't wash the fuel "gently" as they seem to like, but it's the same basic thing, but looks good, real good, a hell of a lot better than our first batch (ethalated methanol=fail) if you have any more question shoot

ON EDIT: take photoes off the internet with a grain of salt, you can never really tell what their "finished" product is, just don't stress over it until you find someone who's done it and run it successfully (crap, that rhymed)
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post #4 of 10 (permalink) Old 01-07-2008, 03:30 PM Thread Starter
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the soap seperated after about 15 minutes.

it has cleared up real nice since it been sitting outside for about a week. the haze is completely gone.

can you elaborate on the drying portion? i did not take an extra step in drying other then letting it sit overnight with the cap off. I know how people dry large batches but how can I dry a 1 liter batch.

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post #5 of 10 (permalink) Old 01-07-2008, 04:05 PM
 
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well, it's not so much an active part of the process so much as it is just like you did, letting it sit, the thing you did was in the 2 liter bottle the neck probably messed you up because it didn't allow the moisture to escape as well as if you had a more open conainer, we usually heat it to 115* for 15 minutes, then let it cool for 2 hours, then repeat like 3 or 4 times, this really speeds it up, and if it totally seperated after 15 minutes you're fine, for our large batches we have 55 gallon drums that we drop an immersion heater into and cover it in a filter sorta thing to keep bugs and stuff out (it tastes kinda sweet) but still lets the water out, the thing is, the water will evaporate on it's own, you just have to make it very easy for it to do
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post #6 of 10 (permalink) Old 02-25-2008, 04:55 AM
 
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You can tell if it's good bio by doing a little experiment. Add 3ml of bio to 27ml of methanol. Shake it up and if nothing falls to the bottom over the next couple of hours, you've got good biodiesel. If stuff falls out, you have soap in your BD and need to reprocess. Pure bio emulsifies in methanol at this ratio. Glycerine will not.
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post #7 of 10 (permalink) Old 02-27-2008, 01:48 AM
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You need to get the Glycerine out of it, and possibly dry it again. If you only washed it once, then try washing it again. Your WVO might be really dirty, or be partially hydrogenated.

Tony

Hopefully GirlMark will chime in and help you out.

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post #8 of 10 (permalink) Old 02-29-2008, 03:50 PM
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Wash repeatedly until the water runs clear.Then all the impurities are gone. It should then have a ph of 7-8. 7 is ideal. the water suspended in the bio generally takes a week to 10 days to completely evaporate/fall out of the bio. Go to www.biodieselcommunity.org for all you ever wanted to know about it and more. Have fun.

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post #9 of 10 (permalink) Old 04-05-2008, 06:31 PM
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yea it's soap, but mostly water. wash it again, try to get all the water out you can. and dry it good. this can be done by bubbling a little air into it overnight, or by leaving the lid off in a dry place for a few days.

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post #10 of 10 (permalink) Old 04-06-2008, 09:17 AM
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Cajun, how do you evaporate water in 100% humidity...LA :nana J/K, by the way nice avatar. Great post thanx for th info.

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