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Old 01-21-2007, 07:44 AM
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Whats the problem

I just cooked 50 gal. of glycerol for 2 1/2 days @ 180-190* and only recovered about 15gal of methanol. The 25 gal. or so I cooked on my first batch I recovered 13gal. around 50%. Why the drop in yield, I set everything up the same.
Any ideas???
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Old 01-21-2007, 08:18 AM
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Quote:
Originally Posted by Gun-Driver
I just cooked 50 gal. of glycerol for 2 1/2 days @ 180-190* and only recovered about 15gal of methanol. The 25 gal. or so I cooked on my first batch I recovered 13gal. around 50%. Why the drop in yield, I set everything up the same.
Any ideas???
Sounds just right. 15 gallons/ 50 gallons is 30 percent, the best I've ever done was 36 percent. I think the 13 gal/ 25 gal was a fluke, did you test that batch for the amount of Methanol? You might have carred over some water with it.........
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Old 01-21-2007, 10:32 AM
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I thought people were getting 50% recovery. The first batch might have been a little more than 25 gal it was the first time with my tank and I didn't mesure the amount going in. The glycerol was in a bunch of cubes, some filled more than others.
Another question?? When the glycerol is cooking my sight tube has mostly a clear liquid in it with the brown glycerol at the bottom, but when I drain it it all comes out brown-no seperation. What's the clear liquid??
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Old 01-23-2007, 08:37 PM
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Quote:
Originally Posted by Gun-Driver
I thought people were getting 50% recovery. The first batch might have been a little more than 25 gal it was the first time with my tank and I didn't mesure the amount going in. The glycerol was in a bunch of cubes, some filled more than others.
Another question?? When the glycerol is cooking my sight tube has mostly a clear liquid in it with the brown glycerol at the bottom, but when I drain it it all comes out brown-no seperation. What's the clear liquid??
Most likely a small amount of methanol, which recombines with the glycerol when you drain the tank.
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Old 01-23-2007, 09:05 PM
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Quote:
Originally Posted by Gun-Driver
I thought people were getting 50% recovery. The first batch might have been a little more than 25 gal it was the first time with my tank and I didn't mesure the amount going in. The glycerol was in a bunch of cubes, some filled more than others.
Another question?? When the glycerol is cooking my sight tube has mostly a clear liquid in it with the brown glycerol at the bottom, but when I drain it it all comes out brown-no seperation. What's the clear liquid??
So are you cooking the glycerol in your processor? The reference to the sight tube sounds like an appleseed....
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Old 01-24-2007, 10:57 PM
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Yes I'm using my apple seed type cooker with a condenser unit attached to the hotwater out side of the tank.
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Old 01-26-2007, 09:22 AM
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Originally Posted by Gun-Driver
Yes I'm using my apple seed type cooker with a condenser unit attached to the hotwater out side of the tank.
Interesting. I presume you are applying vacuum to the tank as well? If so, how much will it stand? I've read that H2O tanks can't handle much vacuum without collapsing...
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Old 01-26-2007, 09:22 AM
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