Technical > Matt Shaff's Engine Shop

purifying oil

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BK:
When I tried cooking it it seemed to take forever but it worked.
When refrigeration guys install refrigerant lines they pull a vacuum on them to remove the moisture. And it takes a while.
I wonder if that would work with the oil in say a pressure cooker pot? Something that wouldn't cave in under vacuum.
It would remove the risk of fire if it would work.

msundstrom:
I use an old propane tank welded to an old flexplate so it doesn't fall over and strap a Moroso heat pad on. Does not work with nitro because the boiling point, I just let it settle a few weeks and drain off the bottom quart or so until clear. The attached picture shows what happens to the different fuels and mixes. The 3 VR1 samples were shaken vigorously and allowed to settle, the Brad Penn 40% was used in my engine with 3 passes on it. Looks very similar to the 45% sample.
Mark S

wideopen231:
Now f you could recycle the nitro.LOL

cad500justin:
When you think about it, you’re effectively building a moonshine still. And I have ..um... allegedly run one once or twice...
As you heat the mixture you will watch the liquid temp rise gradually but the air temp in the line arm will stay room temp and then all of a sudden go right to the boiling point of methanol, at this point you turn on the water to your condenser and viola-methanol starts dripping out. Methanol has a lower boiling point than ethanol (149vs173) and is the stuff that makes you go blind from lousy moonshiners.
The boil will stay at this temp until the methanol is gone and then all of a sudden jump up to the next phase change, the boiling point of ethanol and  then eventually water.
In theory if you had a tall reflux column still you could probably save the nitro.

Otherwise a centrifuge would probably work too...

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