Welcome to the Nexus
Good luck with your studies. Please do share your knowledge here in the Nexus as you learn things
Harmalas are very poorly soluble in naphtha/xylene, you won't have success using those solvents. Maybe something like DCM or Chloroform but those have their own safety/risks profile, availability in different places, etc. If you work with them be sure to be in a well ventilated area ideally with flow hood, etc..
Personally I like a lot the normal salt vinegar and sodium (bi)carb harmala extraction, you can do it with stuff you find in your kitchen, I like that
Also with experience the filtering isnt so bad, there are tricks you can try to help with it, for example:
- Use vacuum filtering which can be improvised with plastic funnel/coffee filter/tubes/hard plastic container/vacuum cleaner
- Use a propper vacuum filtering system buchner/flask/filter/vac pump for less than 100 bucks like for example
this- Use whole seeds instead of grinding them (conflicting reports on how this affects the yield.. For me yields were reduced)
- Decant as much as possible instead of filtering everything
- Filter the rue tea (and the redissolved harmalas in acidic solution later too) as much as possible with a lot of cotton filter stuffed in a funnel before precipitating the alkaloids.
- The first precipitation make it a Manske , being sure to add not more than 100g salt per 1l solution, and let it cool down very slowly from boiling (for example having the container with the recently boiled harmala solution in a hot water bath and turning off heat source and letting it all cool).. This will make for purer precipitation.
- Alternating between manske precipitation and base precip seems like the most cost/time-effective way instead of doing successive precip in the same method.
- Use multiple funnels/filters to make it faster.
- Last but not least, patience, and if not using vacuum, let it happen while you are doing something else and can forget about it for a while.