Fractional Distillation of the Hexane Extract 92 THC Oil

A portion (23.0 g) of the hexane extract was subjected to fractional distillation under reduced pressure (vacuum, 0.1-0.2 mm/Hg). The temperature was raised slowly to 160° C. where a small amount of material ( 1 g) was collected and left separate. The major fraction (10.1 g) was collected between 170 and 180° C. GC analysis of this fraction showed 72.66% THC concentration. 

A third portion (25.0 g) of the hexane extract was subjected to fractional distillation under similar conditions to the previous portions. The major fraction containing THC weighed 10.2 g and had a THC concentration of 73.72%. 

The three major fractions obtained from the above three distillations were combined and analyzed. The analysis showed the concentration of THC to be 70.31%. The mixture (28.9 g) was subjected to fractional distillation, again under similar conditions. The temperature was raised slowly to 135° C. under vacuum (0.1-0.15 mmHg) and the fractions collected were kept aside. The major THC containing fraction was collected at 140-160° C. and 0.05-0.06 mm/Hg. The fraction weight was 18.4 g and the THC content was 92.15%. Source Elsohly 2002 

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