${3\mathrm{.}26}^b.$ Kremser equations: extraction of acetic acid with

$3-$heptanol

An aquovas acotie acid solution flows at the rate of $1000k\frac{g}{h}.$ The solution

is $1\mathrm{.}1$ wts acetic acid. It is desired to roduce the eoncentration of this solution to

$0\mathrm{.}037$ wth aestic acid by extraction with $3-$boptanal at $298K.$ For practieal pur$-$

poses, water and $3-$beptanel are imimiseible. The inlet $3-$heptanol contains

$0\mathrm{.}02$ wth acetic acid. An extraction column is available which is equivalent to a

eountercurrent caseade of as equilibrium stages. What solvent flow rate is

required? Caleulate the composition of the solvent phase leaving the column. For

this system and range of eoncentrations, equilibrium is given by $($Wankat$,1988)$

wt ratio acetic acid in solvent $=0\mathrm{.}828$ wt ratis acetic acid in water

Answer: $1247k\frac{g}{h}$