Ethylene glycol was made by the chlorohydrin route until the 1960s when Union Carbide and Shell Oil developed the direct oxidation process. In the chlorohydrin process hypochlorous acid, HOCl, is reacted with ethylene to produce ethylene chlorohydrin. Then HCl is eliminated and the product is hydrated. Sketch these reactions and the flow sheet, starting from NaCI, ethane, water, air, and electricity.

If the HCl must be disposed of by reacting it with NaOH, how many pounds of salt must be disposed of per pound of ethylene glycol produced, assuming all reaction steps have 100% efficiency?