i haven't done a vacuum distillation yet as i haven't needed to do one and generally i don't trust my chinese distillation glassware to survive
negative pressures, buit i built a recirculating aspirator vacuum pump for general filtration and vacuum application.
i used a 60W 100psi diaphragm water pump, similiar to the one you said you want to use, and a metal aspirator pump from deschem (ebay). i tried 2
styles to arrange vacuum aspirator and water pump, this is what i'm using right now.
it is pretty loud, the pump should be suspended or padded, the vibrations get amplified from the container and then by my fumehood, not nice to hear
for multiple hours.
the water volume is pretty low, maybe 2 liters, it heats up quickly (10°C in 10 minutes maybe), i'm working to actively cool it (and the condenser
water recirculator).
the bubbles created by the pump output would be suckes back in the input tube, ruining the vacuum, so i just put a cleaning sponge as a filter between
the input and output tubes (I don't have a picture with me right now) |