The long chain alcohol is reacted with concentrated sulphuric acid to form alkyl sulphonic acid.
The alkyl sulphonic acid is then neutralised sodium hydroxide solution to produce sodium alkyl sulphate salt, which is detergent .
The long chain alkene is reacted with benzene to form alkylbenzene.
Sulphonation of alkylbenzene:
The alkylbenzene is reacted with concentrated sulphuric acid to form
alkylbenzene sulphonic acid.