burnt said:
What is the purpose of adding ammonia? When one adds the NaCl and precipitates the harmine why turn the solution back to basic as won't this liberate the freebase? Is the purpose of this tek to get harmine HCl or harmine freebase?
if one settled with the manske precipitation, the purpouse would be to get harmine/maline hcl.. But its too crude, not purified enough. The adding of ammonia is to basify and achieve harmine/maline freebase, which precipitates out of the solution on the last step
burnt said:
Is it to liberate freebase extract with non polar solvent and then remake the salt to clean the product?
there is no non-polar solvent used, just water, salt and ammonia.. The salt is not remade, one can just keep the freebase.. You could after achieving the freebase, remaking the salt, letting precip again, remaking freebase, and filtering whenever possible, and each time obviously it would be a purer product. But a propper filtering just after dissolving the precipitated harmine hcl in pure water would already guarantee a much purer product, as mostly only the alkaloids (and the salt) would be very dissolved in the water, and the oils/organic material would be floating in water and could be filtered.
burnt said:
So basically extract with acidic water. Filter out plant material. Add salt until saturated. Freeze.
not freezing, just fridge.. you dont want ice, you want water alkaloids (and some impurities obviously) falling down to the bottom
burnt said:
Alkaloids precipitate. Filter this again (the hard to filter part no?).
yes thats maybe the hardest part to filter
burnt said:
Then dissolve the solid material which is a mixture of the alkaloids and other impurities dissolve it in water. Then basify? Does SWIY use base as is or does SWIY convert it back into salt form? Why use ammonia because it can be evaporated? Evaporate ammonia is horrid smell and damaging to certain kinds of equipment (roto vap seals).
Use base as is.. Why ammonia? Thats good question, I guess any base would do.. I guess the good thing about it is that it evaps and that there is no risk of over basifying and destroying the harmalas, like with NaOH.. But I cant see why any other base wouldnt work
burnt said:
SWIM thinks it might be better to skip the ammonia part and just recrystallize the initial precipitant that was filtered in methanol or something no? Also why not just do some kind of A/B technique?
Thanks for any tips.
Anyway SWIM was filtering a difficult plant extract in his real life and realized hey this might also work for other SWIMs syrian rue extracts. Buchner funnel + filter paper + pure sea sand (cleaned with HCl previously). The sand helps absorb solid particles making the filtering easier. Just a tip SWIMs friend of a friend will let SWIM know if this works. Well its only applicable for filtering out the plant material part.
the use of methanol or other alcohols was basically criticised against, because of the probability of creating an inactive product (harmala red.. which might also be an n-oxide which could be active. We just need people to bioassay and tell us)..
The A/B technique could very well work, yes.. I think one of the advantages was that this could be done with easy to get equipment without the need of petrochemicals and so on.. but indeed I cannot imagine why it would work
The only thing different from, say, mimosa extraction, is that when basifying the mimosa, the alkaloids dont seem to precipitate as freebase, do they? why, then, in this harmalas extraction they precipitate as freebase? But I guess even with them precipitating, as soon as one would mix a non-polar solvent, they would be dissolved in it and then one could evap and achieve a pure product.
btw this sea sand technique sounds very interesting! gotta be tried!