Thank you all!
Just warming that naphtha wouldnt've been a good idea, because that would have also made the gunk redissolve like before.
Precipitation did in fact happen, but as a white/yellow mixed film at the bottom. I was able to dry that again, and will now perform a correct re-x.
So for everyone who has screwed old naphtha that is filled with other oils or that laid with MHRB/Ac-Soup too long, this way should work for them too:A1.) Freeze
Decant liquids (Pipette and Pipetteman*google-translate* are your friend)
(Fan-)Dry the precipitated film or crystals; put the liquids back in the freezer (if it, like mine, still holds spice that couldnt precip).
B1.) An Alternative Way would be direct evaporation of all solvent
--Both ways keep an eye on it for the right time its dry, because at full ventilation it goes wet->dry->gunk --
2. Whatever solids you recover, you perform a correct re-x on.
What i did not get here before is that you only put the solids in for about a minute (and consequently that the naphtha is pre-warmed and fresh)
Then decant the Liquid within this short time range, because after this the naphtha also starts to redissolve the impurities. If your Naphtha is still yellow after this step, you just repeat from start, one more time was enough for me to get the best quality out of the worst gunk
As long as the colour is clear it can be evapped with low air stream to perfect fluffy white xtals.
I also kept the fatty gunk from the bottom (because much), collected and dissolved it in lye and am planing to pull from it with another solvent, that gets jungle alkaloids.
thanks very much for your help, i hope my experiences help others with a bad naphtha problem
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