I'm trying to create an experiment where two immiscible liquids are mixed and are then separated by density. Most of the container is occupied by the lighter liquid, and the small amount of heavier liquid sinks.
Then, a third liquid, immiscible with the other two is added, in amounts intermediate between the two. This liquid is lighter than both of the other liquids and floats.
However, this 3rd light liquid can wet the dense liquid, and after mixing it carries it upwards to the top of the container, basically creating a flotation process.
Here's a rough sketch of what I want to achieve:
I don't care if after the last step the dense liquid then sinks again through the light liquid. If the dense liquid is elevated, even temporarily, that's good enough.
This is slightly similar to industrial flotation processes that separate ore minerals from a slurry of crushed rock. Air bubbles "wet" surfaces of heavy minerals such as copper sulfides and lead sulfides, and float them to the top of a container. In my case I'm talking about three liquids and not a liquid, solid, and a gas.
The reason I'm asking is that I created something similar at high pressure and temperature (~1 GPa, 1000 C) in a sealed pressure vessel and I'm looking for a good way of demonstrating this phenomenon in a more accessible way.
Is there such a thing? I have access to common (and some uncommon) chemical reagents. The liquids have to be transparent, obviously, to see the entire thing. Preferably coloured, or possible to colour them.