Coke oven gas contact with liquor concentrate

A process of separating coke oven gas derived from the destructive distillation of coal in a coke oven into its components without addition of external heat comprising:

• a. feeding said gas directly from the coke oven to a primary cooler,
• b. directly contacting said gas in said cooler with a liquor, derived from step (j) hereinbelow, to cool said gas, to transfer components from said gas to the liquor, and to heat said liquor,
• c. withdrawing cooled gas containing remaining components as the overhead from said primary cooler,
• d. passing at least a portion of said heated liquor from said cooler directly to an evaporator without addition of further heat to said heated liquor,
• e. applying a vacuum to said liquor in said evaporator to boil said liquor and form a cooled concentrated brine and a vapor without addition of heat,
• f. condensing a portion of said vapor in an indirect condenser to form a condensate and separately withdrawing said condensate and said uncondensed vapors,
• g. withdrawing a portion of said brine as concentrated produce,
• h. passing at least a portion of said heated liquor from said cooler to an indirect heat exchanger,
• i. removing heat from said heated liquor in said heat exchanger to cool said liquor passed thereto, and
• j. feeding said cooled liquor from step (i) to said primary cooler for use in step (b).