A saturated-vapor mixture of maleic anhydride and benzoic acid containing 10 mol% acid is a by-product of the manufacture of phthalic anhydride. This mixture is distilled continuously at 13.3 kPa to give a product of 99.5 mol% maleic anhydride and a bottoms of 0.5 mol% anhydride. Using the data below, calculate the number of theoretical plates needed using an LID of 1.6 times theminimum.

Transcribed Image Text:

VAPOR PRESSURE, TORR: Temperature, °C: 10 Maleic anhydride Benzoic acid 50 100 135.8 200 400 179.5 116.8 167.8 155.9 78.7 131.6 185.0 205.8 227