For cooling the reflux column I have seen 2 ways.
One is with tap water, you connect the hose to the tap and let it running while the reaction lasts.
Another is using a recirculating chiller.
My question is about not using either but is very similar to the recirculating chiller (which I can't afford at this moment)
It would be for refluxing a solution of DCM or n-hexane.
My idea is, putting ice in a barrel and using a pump. (and obviously recirculate that water)
I do this because the reaction may last days and I don't want to expend that amount of water nor ethically or economically...
Before you tell me the water will heat up quickly I have to tell you that I will let the barrel in the outside, making the hose go through the window, and currently is snowing.
Maybe this works for the DCM but not the hexane?