This is not my invention, it is a variation on a yopo tek that has been getting used on MHRB and I just wanted to share it since lye and even naptha are getting hard to find and my friend has discovered that it works very well.
Basically, you grind your MHRB fine and mix it with an equal weight of calcium hydroxide and add enough water to make a paste - about as thick as oatmeal. Let this stand, stirring occasionally for a day or so and then spread it out in a glass pan and let it dry thoroughly. Once it's dry, crush it up into a fine powder and cover it with acetone. Get it good and soupy - the only disadvantage of using too much acetone is that it will take longer to evaporate. Stir this around for a few minutes and pour the mess through a cotton cloth, squeezing out as much acetone as possible. Run the acetone through a coffee filter a couple of times and evaporate.
My friend did this on 50g of bark and scraped up 350mg of pink/tan powder that an initial assay showed to be very strong and seems a mix of all of the alks in MHRB.
This was just a first rough test extraction. The yield would surely increase on a more careful run, using a second acetone soak, etc. The product can probably be cleaned up a bit too - it's very rough - and the various spices separated if desired.
Sodium carbonate, which is more readily available than calcium hydroxide, could probably also be substituted.
If a defat step could be incorporated, this procedure could work very well for other DMT containing plants which are a bitch to extract with an A/B.
So there it is - I'm hoping that a few eager young space cadets out there will play around with this and post their results and maybe we can refine this down. If someone wanted to do the carbonate versus hydroxide comparison (only where legal of course) my friend would be eternally grateful since he's getting a little behind and didn't really expect this to work so well and warrant so much further investigation.
I'll leave this stickied for awhile.