Well, some weeks ago we made some experiments with a stb extraction, but it was what I said: some experiments, made with 50 gr of MHRB, lye, water and a solvent, but th amounts weren't too precise, but I tried everything: more, less, fast, slow, ALL, and eventually I was left with nothing: some drops of yellow goo, active, and nothing else. But I thought that the problem was the procedure, and the too big amount of naphta used for the pulls.
So now I decided to be very precise:
100 gr MHRB
100 gr NaOH
1500 ml distilled water
light naphta (that doesn't leave anything after evaporation)
I put the MHRB with the lye and water, shake, let it sit for an hour.
Dosed 40 ml of Naphta, put it in, shake it gently, after an hour I pulled it off. Did this for three times, and eventually I was left with more or less 90 ml of clean naphta (after decanting), very cloudy. Put it in the freezer for 15 hours, put it off. There was a plenty of some matter, like little threads. What was it? DMT? Water turned to some tiny pieces of ice? Anyway, I poured the naphta out with a pipette, the treads disappeared, and I am left with some drops of a brown oil, and some white stains on the glasses used, unscrapable.
Do you guys think that the problem is in the procedure? problems with the freeze precip? (My freezers work well) Or maybe a bad batch of Mimosa hostilis root?
Now I have the seoond three pulls, it's yellow very very cloudy and if I blow some air into it I see some clouds like dust into the liquid. Hope well!

Evap your yellow solvent until its reduced by half the amount and then proceed with freeze precip.

Your problem could be what mine was on my first try: my home freezer just didn't get cold enough. So I moved it to a freezer that reads between -10 and -15 and the yield is ALWAYS substantial.

Hope that helps!

You could use a thermometer to test your freezer.

You could also try working the mixture over a bit more.

Basify h20 - let cool
add MHRB

Shake/STIR/MIX vigorously - and check the consistency for yourself.
-Dont be afraid of the black soup, stick a metal spoon in and see if you detect chunks.

If its smooth as oil then youre good. Chunks are not good.

<><>Now that you have some surface area you can go ahead and add your room temperature naptha and proceed to gentle mix for..... as long as it takes.... (I sometimes go for hours)

Your decanted naptha will definitely be dank.

If all else fails, add heat the equation.

thank you for your replies I think that the freezer could be the answer, i 'll try to test it better. nowvthe solution is deep yellow with a sort of yellow brown mud in it.
i see that in the bottom of the big jar there are many chunks of fiber, the rest is like petroleum and liquid.
will i ever see the famous and beautiful snow globes?

I think it's in the freeze precip too, given that your NP is yellow/cloudy.
My advice whenever the freeze precip is suspect is to just evaporate if you think the solvent is sufficiently saturated.
Then you can deal with it as you please without wondering if you left something in the NP.

Second attempt with the freeze precip... it gave me NOTHING, except a smell like a dmt smoke I tried to let it evaporate a bit before and there were like many very very tiny pieces of yellow sand, if watched in the light. then.... nothing. it will need ages to evaporate (

hi
you seem to have done everything right.

I'm sure that your problem is your fridge. Try to put it as cold as possible...

My first pull was oil on my STB.
The thing I found was to leave the solvent in the mix longer helps. At times I was leaving it anywhere from 12 hours to 3 days. I got better saturation that way.

How long did you leave the solvent in the mix and how long in the freezer?

Oh another thing to remember... Once you have the solvent in the freezer, don't play peek a boo with it. You are letting out the cold from the freezer and never bring it out for a period of time. Once the solvent gets the slightest bit warm, the spice melts again!

i let it sit from an hour up to 2,depending on the pulls, and then in the fridge around 15 hrs, but aftet 3 hrs i put it off to see :-D maybe it 's that...i live in a sunny country, all sun, summer & beach... now i recovered the naphta, i will let it sit about 3 or more hrs and then let it freeze for 24 hrs without touching it

so, i did an experiment doing a little pull and letting it evaporate and there are some tiny crystals in it. but also a lot of dust XD
another question:could i now discard the fibers of mimosa at the bottom of the jar and saving the liquid?

I understood the problem of freezing.. the solvent has some aromatic parts in it...and with them the freeze precip is impossible, right? anyway now I 'll finish this batch this way, then I will move over and search a new and safer solvent... now the evap gives a good yeald but no crystals, just a sticky caramellish stuff, very active..

Yeah sounds about right... You can always recrystallize the goo once you have an appropriate solvent