toluene solubility in water
toluene solubility in water
(OP)
I need the solubility of toluene in water at the azeotrope temperature of about 84 C. Even better would be a source of vapor-liquid equilibria data for toluene and water. I have looked in the DECHEMA Liquid-Liquid and Vapor-Liquid data collections, and it is not there.





RE: toluene solubility in water
RE: toluene solubility in water
However, just looking on the internet, I find several references to toluene-water azeotrope but it appears it is in reference to reagent grade toluene that contains water and methods to dry the toluene further. Shows you how much I know.
Checking my trusty Perry's, there is a section on azeotropes that shows the minimum boiling point azeotropic mixture is 55mol% water in toluene (2 phase) at 84.1C, 760 mmHg. I believe this is referred to as a heterogeneous azeotrope as opposed to homogeneous (eg ethanol/water).
RE: toluene solubility in water
RE: toluene solubility in water
Equations for Henry's Law constant generally take the form of
H = EXP( A + B/T)
Perform a data regression of 1/T as x and LN(H) as y to develop an equation for the Henry's Law constant in terms of temperature. Excel does this nicely with A=intercept coefficient and B=X Variable 1 coefficient.
I happened to find the following which gives you a little background regarding the above and another toluene water temperature point at 45C.
http://www.uaf.edu/chem/434f00/henry/henry2.doc
I would be interested to know if anyone has data beyond that listed above.