Question

Nicotine in water solution containing 1% nicotine is to be extracted with kerosene at 293K. Water and kerosene are essentially insoluble. 100kg of feed solution is to be treated with kerosene in three stage cross current extraction system using equal quantity of solvent each time. 66.3% of nicotine is removed from the feed. Equilibrium data is given below,

How much kg of nicotine and water present in the feed (2 Marks – [Ap/P,2])

If 1% of nicotine is in the feed, it’s weight ratio is ______ (2 Marks – [Ap/P,2])

Write down a nicotine balance for first stage (2 Marks – [Ap/P,2])

How much kg of nicotine is removed from the feed (2 Marks – [Ap/P,2])

Weight ratio of nicotine to water in the final exit stream after the three stages of cross current operation will be ____ (2 Marks – [Ap/P,2])

If the slope of the operating line of extraction is equal to (-1.97), determine the amount of solvent used for each stage (2 Marks – [Ap/P,2])

Answer 1

Nicotine (4 and 2 mg/kg) significantly suppressed water ingestion in water-deprived rats and altered the quantities of flavored solutions ingested by rats compared with those ingested by rats receiving no nicotine.