Theoretically if someone did a closed loop extraction but with etoh on a nitro-assist they could use a peristaltic pump as a recovery pump as long as they had a dephlegmator/condenser and a recovery tank right?.
Like jacketed base>cold condenser >peristaltic pump and then recovery pot that would work right?
Would it speed things up at all?
Edit : would you be able to use a peristaltic pump to extract with frozen etoh?
What flow rate would you need?
Idk jw cause I’m bored
From what I’ve gathered it is possible. But you’d need a tube that would stay flexible at low temp, and if you’re pulling out of a vacuum it isn’t as effective if the vac depth is too deep.
A diaphragm pump would likely work better.
I’ve used both the TRS21 & CMEPOL (piston based) pumps for this.
Agreed. Peristaltic pumps stop being convenient about lab scale.
They’re useful for small scale homebrew type stuff.
You’ll have trouble finding tubing that will last at cryo temperatures.
I was thinking the methanol pump from the frozen alcohol pump thread could work well.
that is a gear pump.
pretty sure they don’t like running dry for any length of time.
sucking on a still is probably best done with a diaphragm pump, which doesn’t give a damn what it’s sucking on (vapor vs liquid).
a gear pump might handle post condenser duty. A diaphragm pump could go between the boiler and the condenser OR post condenser.
the all knowing one offers https://www.randolphaustin.com/large-fluid-peristaltic-pump/ when asked about “large peristaltic pumps”.
Aro air operated diaphragmpump gonna be put to the test here soon. Holds pressure. Seems legit. @downtheterphole suggests it won’t suck hard enough
Air Operated Diaphragm Pumps, AODD Pump | ARO Fluid Handling
So let’s say someone made a falling film. On the ethanol recovery side, could someone use one of those methanol pumps to pump the ethanol from the condenser of the FFE to a centrifuge that’s kept at -40° with fresh material.