Looks like solvent extraction to me rather than distillation. Using butane as the solvent is hazardous in any case; quite flammable.
Hadn’t read the article b4 posting.
Butane? Talk about STUPID !!!
Use the universal solvent - H2O ...
Stuff the pot in a large flask, add distilled H2O, heat, run thru an H2O-cooled condensing tube, and collect in a beaker. Oil floats on top of the H2O - pipette the oil out of the beaker. Have to ensure to add H2O to the flask as it evaporates.
Exactly like making moonshine ...
It may take longer than using butane, but MUCH safer, also only costs about $30 for the lab equipment ...