Nice explanation & demo! I'm looking for fast and efficient method of separating alcohol (IPA or denatured) from dissolved liquid 3d printing resins, as the alcohol can be reused a long time if didn't get dirty fast, and replacing few liters of alcohol after several prints sound very wasteful. Their relative densities have about 30~35% difference, which makes it possible to separate by gravity, but it happens rather slowly, I usually wait about a day, but some people (I guess with more and dirtier resin-IPA mixture are saying they have to wait nearly a week!). And then you have to decant /or siphon it. I prefer siphoning as it doesn't disturbs the bottom layers as much as decanting. And just realized yesterday that I can use a simple water bottle pump to do the siphoning a bit faster and without unneeded jerking of tubes in the dirty mixture container/. But if I shake the container or disturb the bottom layer somehow I'll have to wait another day (or several) for it to separate well again :/ So I wonder if separating funnel or other low-tech method can do that (I've also been fantasizing about cheap DIY centrifuge for larger volumes /compared to lab centrifuges/). It sounds simple enough in principle, but I can't find anything on the market and seems that if I want one I'll have to construct it (I also realized that using an old washing machine if at least its centrifuge works, and if it can work laying on its back - ie with vertical axis of rotation can be adapted for that purpose). Do you guys have any advice?
Maybe it's because of my asd but I'm always really uncertain when to stop draining. Like I don't want to have any of my aquas layer left but I also don't want to take any of my organic layer out as this would effect the yield.
The aqueous layer is the upper layer. The density of chloroform is about 1.5 times that of water so it sinks to the bottom. The potassium iodide is essentially insoluble in chloroform as it is an ionic solid.
I'm not sure exactly what you are asking here, but yes it is important to shake the separating funnel to ensure that the dissolved compounds reach equilibrium between the two layers quickly.
Nice explanation & demo!
I'm looking for fast and efficient method of separating alcohol (IPA or denatured) from dissolved liquid 3d printing resins, as the alcohol can be reused a long time if didn't get dirty fast, and replacing few liters of alcohol after several prints sound very wasteful.
Their relative densities have about 30~35% difference, which makes it possible to separate by gravity, but it happens rather slowly, I usually wait about a day, but some people (I guess with more and dirtier resin-IPA mixture are saying they have to wait nearly a week!).
And then you have to decant /or siphon it. I prefer siphoning as it doesn't disturbs the bottom layers as much as decanting. And just realized yesterday that I can use a simple water bottle pump to do the siphoning a bit faster and without unneeded jerking of tubes in the dirty mixture container/.
But if I shake the container or disturb the bottom layer somehow I'll have to wait another day (or several) for it to separate well again :/
So I wonder if separating funnel or other low-tech method can do that (I've also been fantasizing about cheap DIY centrifuge for larger volumes /compared to lab centrifuges/).
It sounds simple enough in principle, but I can't find anything on the market and seems that if I want one I'll have to construct it (I also realized that using an old washing machine if at least its centrifuge works, and if it can work laying on its back - ie with vertical axis of rotation can be adapted for that purpose).
Do you guys have any advice?
Wow really thorough explanation of using the separatory funnel. Thank you :)
Really Appreciate this 😊
Maybe it's because of my asd but I'm always really uncertain when to stop draining. Like I don't want to have any of my aquas layer left but I also don't want to take any of my organic layer out as this would effect the yield.
During the chloroform and potassium iodine.. which of them is the aqueous layer and organic layer?
The aqueous layer is the upper layer. The density of chloroform is about 1.5 times that of water so it sinks to the bottom. The potassium iodide is essentially insoluble in chloroform as it is an ionic solid.
hi thank you for the help
Thank you
Online chem class
It is very nice!
Thank you!
isn't it not to shake while using the separating funnel?
I'm not sure exactly what you are asking here, but yes it is important to shake the separating funnel to ensure that the dissolved compounds reach equilibrium between the two layers quickly.
Others have learned only to swirl the liquids and must Never shake it.
Very nice