Jasmone, C 11 H 16 O, a valuable intermediate in the fine chemical industry, is obtained from the jasmine plant. A common method of manufacture is to extract the plant material in water, and then use...

Jasmone, C₁₁H₁₆O, a valuable intermediate in the fine chemical industry, is obtained from the jasmine plant. A common method of manufacture is to extract the plant material in water, and then use benzene to concentrate the jasmone in a simple liquid–liquid extraction process. Jasmone (species A) is 170 times more soluble in benzene than in water; thus,

In a proposed extraction unit, the benzene phase is well mixed, with the film mass-transfer coefficient, k’_L
 3.5
 kg mol/ m²
s (kg mol/m³) and the aqueous phase is also well mixed with its film mass-transfer coefficient, k”_L
 2.5
 kg mol/m²

s (kg mol/m³). Determine

a. the overall liquid coefficient, K’_L, based on the benzene side;

b. the overall liquid coefficient, K”_L
, based on the aqueous side;

c. the percent resistance to mass transfer encountered in the aqueous liquid film.