Quote: Originally posted by kadriver ![](images/xpblue/lastpost.gif) | Sorry, a newbie here, what is an RBF?
When moisture getting in the sample being heated is a concern, I have used mineral oil instead of water.
This eliminates the moisture problem, but the temperature of the oil must be monitored with a thermometer because the temperature of the mineral oil
can exceed the temperature of boiling water.
The boiling point of mineral oil is around 300 degrees c.
kadriver |
RBF = Round Bottom Flask
It confused me too at first.
Good idea about the mineral oil, I wouldn't have thought of that. Although, hot oil splashing around...
I think that when you're choosing what bath to use, you have to think about in what 'range' your compound-to-be-distilled boils off. For example:
50-100 C: Water
101-300 C: Min. oil
300+ C: Sand
I used hot water to distill acetone (BP = 56 C), and it worked wonders. The support for the RBF was actually the Keck clips on the condenser, and it
held to the beaker fairly well, suspending most of the flask inside the bath. |