Trizocy
Harmless
Posts: 34
Registered: 16-2-2015
Member Is Offline
Mood: No Mood
|
|
Emulsion and bubbles problem
Hello
Looking for some help to understand why this is happening, and is it possible solve this problem 
I got a Separatory funnel with a long stem adapter attach to it. Inside the sep funnel i got 2 liquids, water and naphtha. The naphtha is running
through the water with the help of the adapter.
But over time a huge emulsion appear (lots of bubbles). And i can see inside the sep funnel when the emulsion is thick enough of bubbles, some of the
bubbles will begin to float and float to the top and out of the sep funnel. So after 20mins i can see that the water layer is reduce because of the
bubbles. (Though that the water will always be at the bottom even if its was a bubble)
So why is this happening ?
Thanks
|
|
|
Zephyr
Hazard to Others
Posts: 341
Registered: 30-8-2013
Location: Seattle, WA
Member Is Offline
|
|
Emulsions occur when two imiscible liquids become mixed, this usually happens when they have similar densities.
I'm not sure that I really understand the situation, are you trying to separate the layers?
If so, this can be done several ways, most simply just letting it settle over time. If this fails, try adding more of either liquid, or adding salt
to the aqueous layer.
|
|
|
Chemosynthesis
International Hazard
Posts: 1071
Registered: 26-9-2013
Member Is Offline
Mood: No Mood
|
|
It happens sometimes when the Gibb's free energy of mixing is favorable in otherwise unfavorable systems. Heat can also speed up the kinetics of
de-emulsification, and a very common way to rid a liquid-liquid system of emulsions is to saturate the aqueous layer with NaCl or a similar salt (as
mentioned by Pinkhippo11), as the hydration shell diminishes system entropy.
|
|
|
Trizocy
Harmless
Posts: 34
Registered: 16-2-2015
Member Is Offline
Mood: No Mood
|
|
Hmm thanks!
So heat can help to de-emulsification the bubbles faster?
The sep funnel are in a storage room outside the house (not isolated) so its pretty cold outside. So maybe that is the problem ?
Thanks 
|
|
|
blogfast25
International Hazard
Posts: 10562
Registered: 3-2-2008
Location: Neverland
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by Trizocy  | Hmm thanks!
So heat can help to de-emulsification the bubbles faster?
The sep funnel are in a storage room outside the house (not isolated) so its pretty cold outside. So maybe that is the problem ?
Thanks |
Heat may help. Try adding something like CaCl2 to the water, if practical of course...
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
