Metallgesellschaft Aktiengesellschaft

Karl-Heinz Bietz

Roland Rammler

Ingo Dreher

Hans J Weiss

Jorg Schmalfeld

Oil-containing solids are dried and heated by contacting them in a drying zone with superheated steam admitted to the zone at a temperature in excess of 200.degree. C. The heated solids may be distilled to remove hydrocarbons therefrom and the resulting proceduce and/or combustion products of the distillation or other combustion products are used to heat a mixed vapor remainder, after separation of said carbon from the vapors formed during the drying, to the temperature of 1200.degree. C. for recirculation to the drying zone.

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Friedberg, Germany

Karl-Heinz Bietz