QUESTION $2$In order to extract acetic acid from a dilute aqueous solution with isopropyl

ether, the two immiscible phases are passed counter currently through a

packed column $5m$ in length and $63mm$ in diameter. It is found that if $0\mathrm{.}45$

$k\frac{g}{m^2}$ of the pure benzene is used to extract $0\mathrm{.}2k\frac{g}{m^2}s$ of $3\%$ acid by mass,

then the benzene phase leaves the column with a concentration of $0\mathrm{.}09$ per

cent acid by mass. The equilibrium relationship is given by: acid $\frac{?}{kg}$

benzene$)$ acid $\frac{?}{kg}$ water$).$ Calculate the concentration of acid in the

raffinate.

Use Table $2$ to calculate questions $2\mathrm{.}1$ and $2\mathrm{.}2.$

Table $2$: Distillate and Bottoms mole fraction values

$\backslash$table$[[$Composition$,\backslash$table$[[$Feed$,],[($kmol$/$h$]],\backslash$alpha $,\backslash$table$[[$Distillate$,],[$kmol$/$h$]],$x$\_($d$),\backslash$table$[[$Bottoms$],[$kmol$/$h$]],$x$\_($b$),],[$A$($LK$),58,1\mathrm{.}4,55\mathrm{.}68,0\mathrm{.}97,2\mathrm{.}32,0\mathrm{.}06],[$B $($HK$),17,1,1\mathrm{.}87,0\mathrm{.}03,15\mathrm{.}13,0\mathrm{.}36],[$C$,25,0\mathrm{.}75,0,0,25,0\mathrm{.}58],[$Total$,100,,57\mathrm{.}55,1,42\mathrm{.}45,1]]$

$1\mathrm{.}2.$ Use the Fenske equation to determine the minimum number of trays.

$(3)$

$1\mathrm{.}3.$ If the tray efficiency is $80\%$ calculate the location of the feed tray.

$(7)$In order to extract acetic acid from a dilute aqueous solution with isopropyl

ether, the two immiscible phases are passed counter currently through a

packed column $5m$ in length and $63mm$ in diameter. It is found that if $0\mathrm{.}45$

$k\frac{g}{m^2}$ of the pure benzene is used to extract $0\mathrm{.}2k\frac{g}{m^2}s$ of $3\%$ acid by mass,

then the benzene phase leaves the column with a concentration of $0\mathrm{.}09$ per

cent acid by mass. The equilibrium relationship is given by: acid $\frac{?}{kg}$

benzene$)$ acid $\frac{?}{kg}$ water$).$ Calculate the concentration of acid in the

raffinate.