SWIM has had good luck in the past with A/B extractions. Acacia has given them some trouble though. They have had what appears to be good luck until after the naphtha pulls. SWIM said that the naphtha they pulled off from the basic solution was milky white (like how it is usually with their MHRB extractions).

However, is it also plausible SWIM has problems with the very last step? They have tried both freeze percip, and evaporation. Both experiments have yielded a nasty yellow goo.

Could this be due to SWIM not defatting the acacia as much as they should? SWIM's acidic solution was a pH of 3.5-4 using White Distilled Vinegar, which was heated (NOT BOILED, about 60 C) using a double bath system for 3, 45 minute intervals. SWIM stirred the solution the entire 2 1/4 hours, due to not having a stir bar. This was then defatted with naphtha 3 times.

Thank you for any and all feedback.

my friend recently did an acacia a/b extraction...he got goo too on the first pull...but it all sank to the bottom of the mason jar that he let sit out for about five hours at room temp...then he transferred the naphtha (minus the goo) to a glass baking dish for freeze precip...the result was a beautiful yield of white (slightly yellowed) fluffy xtals...

you can check the details here...

happy noob acrb extraction report!

Most of that yellow goo is probably a mixture of NMT/DMT. In this thread I describe a technique to separate out the NMT from your solvent/DMT using dry ice so that you can then freeze precipitate normally and get crystals. Xylene works better than naphtha for this, but naphtha will work too (with some caveats).

Nowt wrong with NMT what nature intended!