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I imagine neutralizing the solution with vinegar first would render the solution safe to pour in the drain.

flush it or compost it.

Hi there.
More naphtha will probably make the separation easier, deeper layer & all that.
I've seen people suggest evapping the naphtha down somewhat before doing a freeze precip, so that it is spectacularly saturated with the molecule.
May I ask how you are performing the separation?

Also, if you read some of the comments below noman's tek I think there's s reference to using 0.6ml naphtha per gramme of bark. This may, of course lead to the separation issue again, but will probably help with saturation.
You can always wash your naphtha prior to evap/precip & then do a re-x on your product once you have it - if you feel the need.
https://wiki.dmt-nexus.m...hould_I_wash_my_spice.3F (A little further down is the re-x process).

I dispose of my remnants in some dead leaves & stuff out at the back of my abode.

Good luck

Some tips for better separation:

After letting your lye/root bark solution soak for a while (I think Noman's says for an hour so), add some more lye right before putting in your naphtha. This will heat up your solution, which I've found helps the naphtha separate not only faster, but more completely. You could just as easily keep your container in a hot water bath (careful if it's glass; heating/cooling can fracture it), but the potential pH boost from the additional lye will likely also help for separation.

Also, let your naphtha sit in a hot water bath (obviously away from any open heat source) to heat it before pouring it into the solution. Warm naphtha will separate more easily, and the warmer it is, the less you will have to use to saturate it, which will help with freeze precipitation This will also allow it to pull out a lot more impurities than colder naphtha, but if you're following Noman's recrystallization steps that shouldn't be an issue.

Oh, try to use a container that is as skinny as possible, this will make it easier to siphon off the solvent layer.

As far as discarding the lye solution, lye very common in drain cleaners, so you'd probably end up with cleaner pipes by pouring it down the drain
However, I don't know enough about specific materials in pipes and chemical reactions to safely advise doing this, so it might be better just to neutralize it with vinegar first or compost it as others have said

I find that adding a bit more Lye lets say 5% extra really helps separation. and placing your entire jar in a hot bath works great to. Warming the naphtha before you mix it in helps yield but not separation so much.

As for disposal I was under the impression that lye being drain cleaner was safe to pour down the drain and MHRB being natural is safe on the environment. Just leave the lid off for a day or 2 and let any trace amount of naphtha evaporate off. That's what I've always done.

Did you notice after heating it up that you get a lot more of that yellow goo in the yield??

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30ml naphtha seems like a very small amount of solvent. After my first extractions now I prefer to use a lot of solvent then salt it out, re-base and then pull with a small amount of very warm solvent and then to the freezer, you get a big pull easy to freeze precipitate.

If the solution is too thick, your solvent will not separate as easily. From my understanding, if you use too much naphtha, it will not freeze-precipitate. I have always just let any leftover naphtha evaporate off, neutralized the solution with vinegar, then disposed of it down the drain. Good luck!

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Kinda hard to tell, but I don't really see anything but perhaps a few drops of residual naphtha...

Could you see crystals in it while it was still frozen?

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