Calcium Chloride was first discovered by an English chemist, Sir Humphrey Davy (1778-1829) in 1808. The compound has the formula CaCl2 and it is a deliquescent salt that occurs in seawater. It is also known as the common salt and it is crystalline, lumpy, or flaky in nature. CaCl2 exists in many forms such as dehydrate, monohydrate and hexahydrate forms.
There are several methods to manufacture calcium chloride:
Method 1: Solvay Process: High purity limestone is reacted with salt brine to produce soda ash and calcium chloride according to the chemical equation below
CaCO3 + 2NaCl ---> Na2CO3 + CaCl2
Method 2: Reaction of HCl and Limestone (or other source of Calcium) to produce large quantities of CaCl2.