Mike,
I let mine settle for a week when I can. It washes much easier. I doubt
that it does anything for an incomplete reaction though. That is to say, I
don't think the unreacted oil will settle out.
But:
I have been wondering about something.
When I started making BD it would never pass the methanol quality test.
I inevitably got emulsions in the wash. Now, when I make BD for my
"oil"-fired boiler, I use only about 16-17% (vol/vol) of methanol. The BD
does not pass the quality test, but I don't have the same emulsion problems.
Is it because I let it settle longer (24+ hours vs 6 - 8 hrs)?
Does the presence of a small amount of glycerine/soaps make that much of
a difference when trying to wash BD from an incomplete reaction?
Tom
----- Original Message -----
From: "Mike Weaver" <[EMAIL PROTECTED]>
To: <biofuel@sustainablelists.org>
Sent: Monday, August 06, 2007 2:46 PM
Subject: Re: [Biofuel] Biofuel Quality Test
> FWIW - I let the batch settle for a week or so (the lazy man's way) and
> that also seems to help w/ this.
>
>
> Thomas Kelly wrote:
>
>>Shawn,
>>
>> I suspect that the "dense substance at the bottom of the flask" was
>>unreacted glycerides, indicating an incomplete reaction.
>>
>> I now drain a sample of the mix towards the end of processing.
>> - Shut off the pump
>> - Drain a sample and turn the pump back on
>> - Allow the glycerin to settle for a few minutes
>> - Perform Jan W's quality test on the top (crude BD) layer
>>
>> There is still glycerin in the mix, but if I have succeeded in
>> getting
>>a complete reaction, I do not get an insoluble residue on the bottom.
>>
>> I repeat the test after washing the BD. It is a quick, easy test, and
>>the
>>result, whether it passed or failed can be added to the methoxide for your
>>next batch ..... no wasted methanol, costs nothing to perform the test.
>> Best to You,
>> Tom
>>
>>
>>----- Original Message -----
>>From: "shawn patrick" <[EMAIL PROTECTED]>
>>To: "Biofuel Mailing List" <biofuel@sustainablelists.org>
>>Sent: Friday, September 07, 2007 9:03 AM
>>Subject: [Biofuel] Biofuel Quality Test
>>
>>
>>
>>
>>>Good Day All,
>>>
>>>My question is in regards to the Quality test develop by Jan Warnqvist.
>>>Is
>>>this test to be performed on the product before or after the glycerin has
>>>been removed, or does it matter. I performed the test with out removing
>>>glycerin and found that I got a clear bright phase except you could tell
>>>that there was a more dense substance at the bottom of the flask. I
>>>assumed
>>>that was the glycerin since just extracted a sample from the process
>>>without
>>>separating BD from glycerin. Does the glycerin dissolve in the methanol??
>>>Was I looking at the unprocessed materials in my BD??
>>>
>>>Regards
>>>
>>>Shawn Patrick
>>>
>>>
>>>
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>>>
>>>
>>>
>>>
>>
>>
>>
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>
>
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