History: The salt industry is as old as humankind. Salt has long an essential part of the human diet. It has served as an object of worship and as a medium of exchange, lumps of salt being used in Tibet and Mongolia for money. Its distribution was employed as a political weapon by ancient governments, and in Oriental countries high taxes were placed on salt. Salt is a vital basic commodity for life but is also a source of many of the chemical that are now the mainstay of our complex industrial civilization. The world “salary” is derived from the word “salt.” Uses and Economics: Sodium chloride is the basic raw material of a material of a great many chemical compounds, such as sodium hydroxide, sodium sulfate, hydrochloric acid, sodium phosphates and sodium chlorate and chlorite, and it is the source of many other compounds through its derivatives. Practically all the chlorine produced in the world is manufacture by electrolysis of sodium chloride. Salt is used in the regeneration