Mixtures of water and EDC $($Ethylene dichloride$)$ separated in Liquid Liquid Extraction column by using water as extractor

The mixtures enter to column at mass flow rate equal $(10422\mathrm{.}06K\frac{g}{h})$ and mass flow rate of extractor water is $1801\mathrm{.}51K\frac{g}{h}.$ Calculate the number of theoretical stage in column $.$ operating pressure and temperature $15C$ and $4$atm.

Feed information:

$\backslash$table$[[,$EDC,WATER$],[$Mass fraction,$0\mathrm{.}92,0\mathrm{.}02],[$Mole fraction,$0\mathrm{.}673,0\mathrm{.}327]]$

Extractor Information

$\backslash$table$[[,$EDC,WATER$],[$Mass fraction,$0\mathrm{.}0001,0\mathrm{.}9999],[$Mole fraction,$0\mathrm{.}00003,0\mathrm{.}99997]]$

Raffinate information

$\backslash$table$[[,$EDC,WATER$],[$Mass fraction,$0\mathrm{.}99,0\mathrm{.}01],[$Mole fraction,$0\mathrm{.}931,0\mathrm{.}069]]$