Here is one from the archive: From:
bprofane@netcom.com (Gert Niewahr) Isomerization: This method is out of "Dr. Atomic's Marijuana Multiplier," one of those early 70's doper pamphlets. This process assumes you have pure hash oil to begin with. "Dissolve the hash oil in absolute ethanol or pure methanol in the ratio of one gram extract to ten grams solvent. There must be no water in this solution, as the next step is the addition of one drop of 100% sulfuric acid per gram of extract. Add the acid slowly, drop by drop, stirring slowly and completely, with a long glass stirring rod. Place a Pyrex pot containing the extract-alcohol-acid solution into the refluxing apparatus and reflux for two hours. The acid will not evaporate and will remain in the Pyrex pot. Allow to cool. Take the cooled solution, pour with an equal volume of water and 1/2 volume of petroleum ether into the ether-extraction apparatus (separation funnel). Allow to settle, and drain the ether extract layer. This leaves an ether-extract-acid mix from which the acid must be purged. To accomplish this, pour the ether-extract-solution into four volumes of 5% sodium bicarbonate solution (1 gram bicarb. in 20 grams of water). This will neutralize the acid, releasing CO2 and leaving a solution of sodium sulphate. Allow this to settle into layers, then drain the ether-extract layer. Mix the ether-extract solution with an equal volume of pure water and let it separate. Drain off the ether-extract layer. Evaporate the ether and what remains is hash oil in which all of the cannabinoids have been converted into THC." Oh my, having just typed all this in, I thought to check my copy of "Cannabis Alchemy" for a method. Not only does it concur with this method of isomerization, it has lots of whiz hints on fractionally distilling hash oil to get an ultra-pure product. It also claims that if you convert THC to its acetate, it becomes very potent and psychedelic. Yow.
