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Bad smell after recrystalization with naphta

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R

Runes

Rising Star
I tried to do a recrystalization of a small amount of FB spice using Naphta.
The freeze precipitation looked good, and there were all these crystals sitting at the bottom of the glass.
After 48h I took it out of the freezer and poured the Naphta away. Then I fan dried it for another 8h.

But there is still a remaining bad smell like petroleum. And some of the DMT sticks on the glass and feels like it is slightly wet.
What do you think? Bad naphta? Or does it just need to be dried longer?

Lucky, I only used such a small amount of spice for it...
 
After the drying of the crystals, some of the naphta is locked inside the crystal structure of the spice, making it look waxy.

What I mostly do is this:

1. With a razor blade I will stroke over the waxy crystals and spread them out over the evap dish, this will release a lot of the solvent trapped inside, you will see a hardening happen almost instantly.

2. After leaving the crystals to dry for a few hours I scrape them up and redissolve them in IPA (or acetone) this will get the rest of the trapped naphta out. Immediately after the redissolving I will pour the mix onto the evap dish again to dry.

3. After drying I will chop up the crystals with the blade. You will notice that the spice got pretty hard already! Chop them up until you have a very fine powder.

4. Spread that powder out over the dish and let that dry for two days, chopping them up again once a while during that time.


This gives me very dry powder that smells just right. :D


Kind regards,

The Traveler
 
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