Uiui wrote:1. Can boil the basified harmala in hot water and add vinegar + some water to it. Or should I just boil hot water with vinegar and add to the harmala?
No need to boil the basic soup and for safety it's better not to. Also,
lye may damage stainless steel at higher temperatures:
Quote:Both 304 and 316 stainless steel types are resistant to a wide range of concentration and temperature.
Below 80 degC they can be considered resistant to any concentration of sodium hydroxide, up to the limit of solubility.
There can be a risk of stress corrosion cracking (SCC) attack at higher temperatures, which is common to both the 304 and 316 types.
This should not be an issue if service temperatures are limited to a 95 degC maximum.
Hot water with vinegar will make it warm enough. Actually heating is not necessary for the purpose of dissolving the freebase, but it speeds it up.
I've read on here that 10 ml 5% vinegar will dissolve a gram of freebase harmalas.
Your basic soup should have ~ 7% harmala content.
neb wrote:just make sure the pH is around 4 or so, it should all dissolve in that, acctually i think anything below 5 should do too.
I think if you add the absolutely minimum amount of acid needed to dissolve the harmalas and dissolve them, your pH will be 7. But that's theoretical, and for practical purposes it's better to add more acid than the absolute minimum required, because the molecules need to find their 'partner' ions for the reaction to take place and the more ions from the acid floating about, the quicker the dissolution will be. (In that theoretical example of using the minimum amount of acid, it would take infinitely long, because the last molecule of freebase harmala would have to be very lucky to bump onto the last free acetate ion).
neb wrote:
but tbh, the tao of rue extraction helped me loose 300grams of rue seeds.
my recommendation would be to use food safe ingredients, calcium carbonate and citric acid/vinigar, I used lye and added too much, because it was such a strong base when i needed to acidify it it struggled a lot.
As long as you take safety precautions, lye works well, better than any carbonate as you need so much less. This allows you to go from boiling to basing without the need to boil it down to a smaller volume, which saves energy.
You only need a tiny bit. For my 10 liter pot I only need like a teaspoon or less. A pH pen can come in handy.
If you accidentally add too much lye, you can remove the excess by washing it with non-acidic water.