OLEFINS FROM POLYOLEFINS AND MIXED PLASTICS BY PYROLYSIS

Mixed plastics collected from households were separated into a poly(vi nyl chloride) (PVC) poor light fraction (0.66 wt.% chlorine) and pyrol yzed in a fluidized bed reactor. The process was optimized to give hig h amounts of olefins. For comparison, high density polyethylene was us ed as feed material. The pyrolysis products contained about 36% ethene , 15% propene, 9% 1-butene and butadiene and an additional 15% pyrolys is gasoline. The olefins could be used again after separation as monom ers for the production of polyolefins.