27.4-9. Stripping Nicotine from Kerosene. A kerosene flow of 100kg/h contains 1.4wt% nicotine and is to be stripped with pure water in a countercurrent multistage tower. It is desired to remove 90% of the nicotine. Using a water rate of 1.50 times the minimum, determine the number of theoretical stages required. (Use the equilibrium data from Example 27.4-3.) \begin{tabular}{lccc} \multicolumn{1}{c}{x} & y & x & y \\ \hline 0.001010 & 0.000806 & 0.00746 & 0.00682 \\ 0.00246 & 0.001959 & 0.00988 & 0.00904 \\ 0.00500 & 0.00454 & 0.0202 & 0.0185 \\ \hline \hline \end{tabular}