what is salting out of soap:

Explanation

Manufacture of soap:KETTLE PROCESS:
This is the oldest method. But, it is still widely used in the small scale preparation of so There are mainly, two steps to be followed in this process.
(i) Saponification of oil:The oil, which is used in this process, is taken in an iron tank (kettle). The alkaline solutia (10%) is added into the kettle, a little in excess. The mixture is boiled by passing steam through it. The oil gets hydrolysed after several hours of boiling. This process is called Saponification.
(ii) Salting out of soap:Common salt is then added to the boiling mixture. Soap is finally precipitated in the tank After several hours the soap rises to the top of the liquid as a .curdy mass.. The neat soap is taken off from the top. It is then allowed to cool down.