How to Use a Rotary Evaporator (Rotavap)

This is a video from FabioChem demonstrating the correct way to use a rotary evaporator (rotavap).
Details not explained in the video (in educational settings, these will usually be done by your instructor):
1. You will need dry ice (isopropanol) in the cold finger and some liquid nitrogen in the vacuum trap
2. You will need to set the water bath temperature appropriately; this depends upon the boiling point of the solvent you are evaporating (generally between 24 - 45 C)
3. Adjust the vacuum so that the solvent distills at a rate that is reasonably fast, but not too fast (art + science!)
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[@martinfarfsing5995]

I am watching all the penguin proff blogs , thank you for the great gifts .

[@Penguinprof]

Glad you like them!

[@ayeshawadood3635]

very helpful. Sir could you please suggest me if we can use Rotary Evaporator for the extraction of essential oil.

[@safeenawahab5493]

Its very good and understandable vedio ..thanks alot sir for making such a nice vedio

[@kassandraaaa7528]

We extracted tamarind seed oil using ethanol and we are separating the two, how to know if the tamarind seed oil is already pure and has no traces of ethanol? We are using rotavap, Is there any clear indication if we should turn off the rotavap already?

[@rainh2135]

How to collet the compound in the bottle flask ? If iam using the liquid sample.

[@Sh0pard]

ty

[@heroho149]

Thank you so much , very helpful.

[@Ta3iapxHs]

Great video! Also, what is the water bath? Is it hot water to help with the evaporation process?

[@Penguinprof]

Glad it was helpful!
Yes and yes.

[@noreenramzan6727]

Sir could u suggest me how to fix rotation error of heidolph rotary evaporator

[@Penguinprof]

I'm afraid we can't diagnose hardware problems - sorry!

[@noreenramzan6727]

@@Penguinprof ok thank u

[@cadeiraratom]

Great video, could you call this a distillation?

[@Penguinprof]

Strictly speaking, yes it is. In practice, no one calls it a distillation because in this case, what is evaporating is waste (usually in a distillation process, you COLLECT the compounds that evaporate from the mixture). The Swiss company Büchi came up with this idea in 1957 (and made a fortune!)

[@cadeiraratom]

ThePenguinProf interesting

[@randomman2588]

Once I forgot to turn vaccum off after I used it and the pressure stole my product. It was a little embarassing, but it must have looked kinda funny to my colleagues :D

[@noreenramzan6727]

🤣

[@Sp-fe1eo]

thanks for the video...mr penguin 🐧

[@Penguinprof]

You're welcome from two penguins in the lab... 🐧🐧