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Hexane isn't much different from other solvents but is a bit harder to get a quality product than butane.
However, Hexane is harder to purge vs butane so using a vacuum to lower the boiling point and making the oil as thin as possible to allow for purging is preferred. It's fine if you don't have a vacuum if you can do an ethanol wash after. Otherwise butane will get you a far more pure end product.
Ethanol is as easy as it gets for purging. Part of the reason people use ethanol for a wash is because it evaporates so easily it also has a scrubbing action that will remove the small amounts of your prior solvent along with it cleaning your extract up.
Acetone is an aggressive solvent, much more so than ethanol so it's going to redissolve the lipids, wax, etc you're trying to remove in the winterization step which is what you don't want. Very poor choice.
It's a bit easier than hexane to purge but harder than butane. I wouldn't say it's a very poor choice for your main extraction but it's far from superior to butane. When using a vacuum to lower the boiling point it would be adequate.
You could get cheap 90-95% ethanol to winterize with if you set up a home still in your kitchen.
Here going rate is 70-80 a gram for BHO sometimes 100 when things are dry. I get ten packs from my broker for $350 or twenty packs for $600 it's made from bud and then I just winterize and purge and I end up with really quality product for cheap.
He's got a really good exchange rate trading commercial for some of the kushes, etc he gets too. :-0
my understanding is you're using water to dissolve some of the contaminants then purging the hexane to get a cleaner product?
This works because the hexane and water don't mix together, but water is a very poor solvent. Try using ethanol in the freezer, strain with a coffee filter, and purge the hexane + ethanol mixture. You will get a better final product and your product will also contain less solvents as ethanol evaporates much better than hexane does. Ethanol also has a scrubbing effect when evaporated and carries away other solvents with it. Your yield will be less and even some of the cannabinoids you want will be lost but most of the yield loss will be from contaminants.
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