A method for extraction of desirable compounds from cannabis provides for high-cannabinoid full spectrum (HCFSE) extractions, using CO.sub.2 at low temperature to extract the compounds in an extraction vessel. The CO.sub.2 with extracted compounds is transferred to a heated vessel which converts the CO.sub.2 to a gas, allowing the desired compounds to drop out and be removed.

A method for extraction of desirable compounds from cannabis provides for high-cannabinoid full spectrum (HCFSE) extractions, using CO.sub.2 at low temperature to extract the compounds in an extraction vessel. The CO.sub.2 with extracted compounds is transferred to a heated vessel which converts the CO.sub.2 to a gas, allowing the desired compounds to drop out and be removed.

A process for making high density fuels, pure terpene dimers, and byproducts from mixed terpene feedstocks and the resulting high density fuel products. The fuels produced by the process includes, dimerizing at least one terpene feedstock by mixing at least one terpene with at least one heterogeneous acidic catalyst and at least one solvent used to control the reaction temperature for a desired time and temperature to produce a crude terpene dimer (C.sub.20H.sub.32 mixture) in about 65% to about 95% chemical yield, hydrogenating the crude terpene dimer (C.sub.20H.sub.32 mixture) with at least one hydrogenation catalyst under a hydrogen atmosphere and removing the hydrogenating catalyst(s) to produce about 65% by weight to about 95% by weight of hydrogenated terpene dimer mixture, and utilizing a separation method against the hydrogenated terpene dimer mixture to produce byproducts, where the process generates a hydrocarbon mixture with a viscosity of between about 20 and 50 cSt at 40 C.

A process for making high density fuels, pure terpene dimers, and byproducts from mixed terpene feedstocks and the resulting high density fuel products. The fuels produced by the process includes, dimerizing at least one terpene feedstock by mixing at least one terpene with at least one heterogeneous acidic catalyst and at least one solvent used to control the reaction temperature for a desired time and temperature to produce a crude terpene dimer (C.sub.20H.sub.32 mixture) in about 65% to about 95% chemical yield, hydrogenating the crude terpene dimer (C.sub.20H.sub.32 mixture) with at least one hydrogenation catalyst under a hydrogen atmosphere and removing the hydrogenating catalyst(s) to produce about 65% by weight to about 95% by weight of hydrogenated terpene dimer mixture, and utilizing a separation method against the hydrogenated terpene dimer mixture to produce byproducts, where the process generates a hydrocarbon mixture with a viscosity of between about 20 and 50 cSt at 40 C.