Halogenated C2 compounds

The major products in this group consist of trichloroethylene, perchloroethylene, and 1,1,1-trichloroethane ethylene dichloride is strictly speaking within the group but as its major use is in the production of vinyl chloride, the two will be considered together in the next section. 

The early routes to both tri- and perchloroethylene used acetylene as a raw material chlorination was followed by dehydrochlorination. The preferred raw material is now ethylene, proceeding via ethylene dichloride. 

1-trichlorethane is normally produced from vinyl chloride, by hydrochlorination to 1,1-dichloroethane, followed by further chlorination. 

Ethyl chloride, ethyl bromide and ethylene dibromide are similarly prepared by halogenation of ethane, or via hydro-halogenation of ethanol. 

---

Other significant classes which are discussed in separate chapters are Chlorinated Aromatics, Fluorocarbons and Chloroaromatic Compounds containing oxygen. The production processes for all the products mentioned in this chapter are closely related, and often integrated on a common site but initially they will be considered as 3 arbitrarily chosen groups, namely Chloromethanes, Halogenated C2 compounds (ethanes and ethenes) and Vinylchloride/Vinyl-idenechloride. 

---