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I've been researching CBD to THC conversion with zeolite while waiting for all my ingredients to turn up in the post before trying it myself.

Reading through the information in the link to the google patent posted by THanoC, I noticed examples 6 and 15 showed the best results.


Example 6:

Prior to reaction, 1.5 g of Zeolite-Y ‘'’ form was suspended in 10 ml distilled water and 3 g of sodium bicarbonate was added. This mixture was stirred 1 hour, filtered and the zeolite washed 3 times with 10 ml distilled water and once with 10 ml ethanol. The zeolite was dried approximately 2 hours in a vacuum oven at 50° C. Suspending 100 mg of the zeolite in 5 ml distilled water gave a pH reading of 9.2. CBD (5.0 g) was combined with the treated catalyst (0.6 g) under vacuum. The mixture was warmed to 175° C. for 2 hours. The cannabinoid content of the product mixture consisted of 4.2% CBD, 13.4% Δ8-THC, and 73.9% Δ9-THC, with the remainder being minor cannabinoids.


Example 15:

CBD (1.04 g) and previously used buffered Zeolite Y form (0.2 g) were combined in a round bottom and warmed to 175° C. under vacuum with stirring. After 1 hour the cannabinoid content of the product mixture consisted of 72.6% Δ9-THC, 14.7% Δ8-THC, and 3.3% CBD with the remainder being minor cannabinoids eluting close to Δ9-THC.


What was it was about examples 6 and 15 that gave such a high percentage of delta 9 in the end result compared to all the other examples?

Does the type of Zeolite effect the result? Does the ph of the Zeolite effect the result?  Could it be that the Zeolite ph adjustment step is what caused the higher delta 9 to delta 8 ratio?


Example 7 showed promising results as well with just 5 min of heating. It'd be interesting to see how example 7 would have turned out with an extra 10 min heating.


Example 7:

Prior to reaction, 1.0 g of Zeolite-Y ‘'’ form was suspended in 10 ml distilled water and 2.3 g of calcium acetate was added. This mixture was stirred 2 hours, filtered and the zeolite washed 3 times with 10 ml distilled water and once with 10 ml ethanol. The zeolite was dried approximately 2 hours in a vacuum oven at 50° C. CBD (0.9 g) was combined with the treated catalyst (0.1 g). The mixture was warmed to 175° C. for 5 minutes. The cannabinoid content of the product mixture consisted of 68.6% CBD, 7.5% Δ8-THC, and 22.9% Δ9-THC, with the remainder being minor cannabinoids.


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