I noticed that the Zeolite Tek by WKU Consulting has been re-posted several times so I thought I'd add this paper to the stirring pot:
patents.justia.com
US Patent for Method for the preparation of dronabinol Patent (Patent # 8,324,408 issued December 4, 2012) - Justia Patents Search
The present invention relates to a method for the preparation of dronabinol ((6aR-trans)-6a,7,8,10a-tetrahydro-6,6,9-trimethyl-3-pentyl-6H-dibenzo[b,d]pyran-1-ol, Δ9-tetrahydrocannabinol (Δ9-THC)) from cannabidiol (CBD) by cyclization of cannabidiol (CBD)...
patents.justia.com