I was wonderin when you are running your pump with a vacuum chamber, do you have your pump runnin for the whole 10-12 hours slowly letting air in throught the filter, or do you close off the air intake completely, let the pump build up the vacuum and then once you have reached your ideal vacuum level close off the pump hose and just let the chamber sit tight with vacuum of -29 and temp of 120 f, evacuating the air every few hours.
It depends on what you are making. I infer you are making wax, to be purging that long.
Lots of ways to catch a fish, but we are doing some interesting experiments in our TV-2 Cascade TEK test sled. It is equipped with a Welsh chemical duty diaphragm pump and at least part of the time, with an Inficon mass spectrometer residual gas analyzer to keep track of where we are in the process and what is coming off at what rates.
One way to wax fast and maintain aromatics, is to stick material to be waxed into a preheated oven, turn on the pump, open the isolation valve, and let it run.
We control the pressure by bleeding in N2 through the back fill vent. The N2 atoms ricocheting around, help dislodge and attract solvent molecules on the way out, as well as exclude oxygen, which is our enemy when our oil is in a heated state.
We pump to -29.9 (30") and back off to about -28" and when the reaction becomes robust, we close the vacuum valve until it calms down, and then again open it. The pump could be shut off during that time, but we just let it run, because it doesn't last that long.
When the final flurry settles down, we take it out of the oven and chill it enough in the freezer to flip it and stick it back in the oven. We close our oven, but don't leave it under vacuum, and do shut off the pump while flipping.
Once it no longer flurries when flipped, we typically run the pump steadily until finished.