Behold the Mk VII, which includes inline dewaxing and produces its own refrigeration for doing so.
The column flushes both directions through the column and directs the flow to a top pot, where the temperature is reduced by evaporating away enough solvent under vacuum to produce the refrigeration required. More clean solvent is added as needed and the process is controlled by thermocouple and PID controller.
When the desired temperature is reached and held for the required time, valves are opened, which allow the mixture to flow down through a filter section, to a lower pot, where the solvent is removed and the oil recovered.
We have a joint R&D project to develop filtration for both the waxes and unwanted darker polar elements, but until that culminates, the filter section can be a simple sock filter, followed by polishing filters.
Sorry for the dual pictures of the same drawing. The second isn't a thumbnail, but is still pretty small.
The column flushes both directions through the column and directs the flow to a top pot, where the temperature is reduced by evaporating away enough solvent under vacuum to produce the refrigeration required. More clean solvent is added as needed and the process is controlled by thermocouple and PID controller.
When the desired temperature is reached and held for the required time, valves are opened, which allow the mixture to flow down through a filter section, to a lower pot, where the solvent is removed and the oil recovered.
We have a joint R&D project to develop filtration for both the waxes and unwanted darker polar elements, but until that culminates, the filter section can be a simple sock filter, followed by polishing filters.
Sorry for the dual pictures of the same drawing. The second isn't a thumbnail, but is still pretty small.