Linde Aktiengesellschaft

Berndt Hoerner

Walter Schramm

Udo Lang

Ullrich Hildebrandt

Hans Kistenmacher

Helmut Kick

Apparatus for heating a flowable mixture of particulate coal and a liquid hydrocarbon stream at high pressure by heat exchange with reaction products of a coal hydrogenation and liquefaction process which are obtained in the gaseous phase under reaction conditions, comprising direct heat exchange means and indirect heat exchange means combined into a single structural unit, and being devoid of liquid spray means, said single structural unit containing an upper zone separated from a lower zone and being housed in a pressure vessel, and further comprising feed means for viscous material connected to the bottom part of the housing, said indirect heat-exchange means being equipped with a feed means and a discharge means for a heat exchange fluid, said direct heat-exchange means arranged above said direct heat exchange means and being provided with discharge means for heated viscous material, feed means for heat exchange fluid for said direct heat exchange, and discharge means for the latter heat exchange fluid communicating with said indirect heat-exchange means, thereby resulting in apparatus wherein essentially the same fluid is employed for heat exchange purposes for both the indirect an direct heat exchange means.

Special heat exchange for coal liquefaction system

In the purification of a hydrogen stream contaminated with at least methane and ethane, e.g. a hydrogen cycle gas from a coal hydrogenation process, where the hydrogen stream is subjected to multistage partial condensation and separation of the respectively formed condensates, the improvement of subjecting the hydrogen stream under a pressure of above about 100 bar to the multistage partial condensation and separation of having in the final condensate 5-40 molar percent of ethane, thereby favorably altering the K-value of methane and its ease of removal from the hydrogen which is only altered in the manner desired when the process is conducted under pressures in excess of about 100 bar.

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Munich, Germany

Berndt Hoerner