| abstract |
Allylic geminal dihalogen compounds such as 3,3-Dichloropropene coming, for example, as an intermediate boiling byproduct stream from a process of making allyl chloride by the chlorination of propylene, are converted into 1,3-dihalo allylic compounds such as cis- or trans-1,3-dichloropropene or a mixture of these by contact in the liquid phase with an alumina, silica or zeolite catalyst possessing a predominance of basic sites and a particle size of 0.15 mm to 12.5 mm and /or an alkali or alkaline earth content of 0.1 to 10 weight percent. |