Since chlorine was prepared at Edgewood, it was logical that some of this chlorine should be utilized in the preparation of sulfur chloride. The plant constructed consisted of 30 tanks (78 inches in diameter and 35 feet long), each capable of producing 20,000 pounds of monochloride per day. The tanks are partially filled with sulfur and chlorine passed in. The reaction proceeds rapidly with sufficient heat to keep the sulfur in a molten condition. If the chlorine is passed in too rapidly, the heat generated may be sufficient to boil off the sulfur chloride formed. Hence water pipes are provided so that a supply of cold water may be sprayed upon the tanks, keeping the temperature within the proper limits. [Illustration: FIG. 31.—Row of Furnaces for the Preparation of Ethylene.] In the manufacture of one ton of mustard gas, about one ton of sulfur chloride and a little less than half a ton of ethylene (12,640 cubic feet) are required. GERMAN METHOD OF MANUFACTURE[19] [Illustration: FIG. 32.—Preparation of Ethylene at Badische Anilin und Soda Fabrik. 60 units.] [Footnote 19: Norris, _J. Ind. Eng. Chem._, =11=, 821 (Sept., 1919).] “PREPARATION OF ETHYLENE—The gas was prepared by passing alcohol vapor over aluminum oxide at a temperature of 380° to 400°. The details of the construction of one of the furnaces are given in Figs. 32 and 33. The furnaces were very small and sixty units were needed to furnish the amount of gas required. The tubes containing the catalyzer were made of copper and were heated in a bath of molten potassium nitrate. It was stated that the catalyzer was made according to the directions of Ipatieff, and that its life was from 10 to 20 days. The gas produced was washed in the usual form of scrubber. The yield of ethylene was stated to be about 90 per cent of the theoretical. [Illustration: FIG. 33.—Ethylene Production at Badische Anilin und Soda Fabrik. 1 unit.] [Illustration: FIG. 34.—Chlorhydrin reaction kettle at Badische Anilin und Soda Fabrik. 16 units.]