Fundamentals of Chemical Engineering

Name:

Lucky

Isaiah Cole

TEST $2$

Counter$-$current stage extraction is used to extract acetone from the water phase into the o$-$xylene

phase $($solvent$).$ The feed entering the extractor contains $7\mathrm{.}5wt\%$ of acetone, the solvent

entering the extractor $0\mathrm{.}5wt.\%$ of acetone. The mass flow rate of the solvent is $0\mathrm{.}8k\frac{g}{s},$ and the

mass flow rate of the feed is $1k\frac{g}{s}.$ The raffinate is to contain $3\mathrm{.}8wt.\%$ of acetone. The

extraction is carried out at $30C.$ Calculate the composition of the extract and the required

number of equilibrium stages.

Equilibrium $($given in relative mass fractions$)$: