Other Epoxidation Methods

Other Epoxidation Methods: Chlorohydrin Process

General procedure

The formed in this process is not obtained by direct of oxygen but by initial reaction of the olefin with hypochlorous acid. Alternatively, the olefin can be reacted with chlorine and water generating the hypochlorous acid in situ.

Preparation of epichlorohydrin

Epichlorohydrin mainly is an intermediate in the synthesis of epoxy resins, but it also can be used for the preparation of glycerol.

The industrial synthesis of epichlorohydrin consists of reacting allyl chloride with hypochlorous acid at 30 - 50$°C$ in a two-step reaction. In the second step, the generated dichlorohydrin is reacted with excess calcium hydroxide to yield epichlorohydrin.

Fig.1