Check the solution to Example 14-1 with a McCabe-Thiele calculation. Example 1 In production of sodium hydroxide

Check the solution to Example 14-1 with a McCabe-Thiele calculation.

Example 1

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In production of sodium hydroxide by the lime soda process, a slurry of calcium carbonate particles in a dilute sodium hydroxide solution results. A five-stage countercurrent washing system is used to remove sodium hydroxide. The feed contains 1 kg dry calcium carbonate and 6.7 kg water. The underflow from the settlers entrains approximately 3.0 kg liquid/kg dry calcium carbonate solids. Inlet water is pure. If 7.0 kg wash water/kg dry calcium carbonate solids are used, predict the recovery of NaOH in the wash liquor.