Abstract: A tar separating device for separating tar from hot rinsing liquid, specifically, the rinsing liquid of a receiver of a coke oven battery including a container having a rinsing liquid inlet, a solids removal device for removing solids from the liquid as the liquid enters the container, a tar dewatering chamber located in the container near the inlet such that the rinsing liquid entering the container flows over the outer surface of the chamber and a tube in the container for conveying rinsing liquid into the tar dewatering chamber. The inlet to the tube is located at a point distant from the rinsing liquid inlet to the container. At the tube inlet point, the temperature of the liquid is lower than that at the inlet. The present invention utilizes this temperature differential to effect a particularly distinct separation between the tar and the water. The device further includes means for separately removing the tar and the water from the dewatering chamber.

Abstract: As hot crude coke oven gas is conveyed from coke ovens to a position of utilization, condensation of higher hydrocarbons from the coke oven gas is prevented by increasing the temperature of the coke oven gas to a temperature such that higher hydrocarbons are prevented from condensing therefrom. This increase in temperature may be achieved by injecting oxygen-containing gas into the hot crude coke oven gas, to thereby produce a partial combustion of the coke oven gas. Alternatively, when the coke oven gas is being conveyed to a thermal cracking reactor wherein the coke oven gas is thermally cracked to form a cracked gas, the temperature of the coke oven gas may be increased by passing the coke oven gas through a heat exchanger in indirect heat exchange relation with the cracked gas.