VERFAHREN ZUM AUFARBEITEN VON ABFALLMATERIAL.

摘要

Processing of waste materials contg. hydrocarbon cpds., esp. plastics or rubber, is effected by pyrolysing the material and cooling the pyrolysis effluent to obtain a liq. fraction and a gas fraction. Two processes are claimed: (A) the pyrolysis effluent is cooled to condense benzene and higher-boiling components; the condensate is evaporated to produce a benzene- and toluene-contg. vapour; the vapour is contacted with the gas fraction in the present of a zeolite catalyst at 300-450 deg.C; and the prod. is cooled to obtain a liq. fraction and a residual gas fraction; (B) the pyrolysis effluent is cooled so as to obtain a special gas fraction, contg. 2-3C olefins and 6-7C aromatics in a molar ratio of 0.8-1.2:1; the special gas fraction is contacted with a zeolite catalyst at 300-450 deg.C; and the prod. is cooled to obtain a liq. fraction and a residual gas fraction.