Abstract
Abstract After pointing out that the by-product oven has displaced the beehive oven as a producer of metallurgical coke, the author discusses the increasing value of by-products as compared to that of the coke itself. He then takes up successively the subjects of competitive sources of gas for industrial and domestic use; utilization of the hydrogen in coke-oven gas for the production of synthetic ammonia; competition between synthetic and by-product ammonia; utilization of sulphur in coke-oven gas in the production of ammonium sulphate; processes for the recovery of sulphur in connection with gas purification; recovery of phenols from ammonia still wastes; benzol and light oils; production of resins from coal by-products; tar and tar products; and the hydrogenation of coal tar.
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