The Problems in Increase of Selectivity in the Ethylene Oxychlorination Process. Part II. The Main Regularities of Chloroorganic By-products Formation in the Ethylene Oxychlorination Process

Abstract

The main regularities of the chloroorganic by-products formation in the ethylene oxychlorination process in the fluidized bed catalyst are examined in the round-up article. On the basis of published literature data conclusions about by-products formation by the reactions of dichloroethane dehydrochlorination and partial oxidation are drawing. The increase of the process temperature promotes to the rise of the by-products yield. There is indicated that the use of the catalysts containing cupric chloride and chlorides of alkali or alkali-earth metals helps to reduce of the side reactions part. In the industrial conditions the best results are reached at the use of the catalysts with the not high copper content at the external surface of the granule. The iron penetration to the catalyst due to the erosion of the industrial reactor walls leads side by side with the decrease of the oxychlorination process rate to the increase of the chloroorganic by-products yield.