Electrochemical and metallurgical industry . FIG. 4.— CELL FOR ELECTROLYSIS OF SODIUM CHLORIDE. outside of the cell to obtain sodium hydroxide, and theregenerated mercury is returned into the cell through Mand B. (It will thus be seen that the mercury acts in thiscell as cathode pure and simple, and does not act as abipolar electrode.) The sodium chloride solution enters. FIG. 5.—CELL ROOM OF JEMEPFE WORKS OF SOLVAY CO. the cell through S, and leaves through S, the direction ofits flow being, therefore, opposite to that of the looo-hp. plant at Jemeppe-sur-Sambre, the cell ro
Electrochemical and metallurgical industry . FIG. 4.— CELL FOR ELECTROLYSIS OF SODIUM CHLORIDE. outside of the cell to obtain sodium hydroxide, and theregenerated mercury is returned into the cell through Mand B. (It will thus be seen that the mercury acts in thiscell as cathode pure and simple, and does not act as abipolar electrode.) The sodium chloride solution enters. FIG. 5.—CELL ROOM OF JEMEPFE WORKS OF SOLVAY CO. the cell through S, and leaves through S, the direction ofits flow being, therefore, opposite to that of the looo-hp. plant at Jemeppe-sur-Sambre, the cell roomof which is shown in Fig. 5, produces in the whole 7500tons of various products per year; caustic soda, causticpotash and bleaching powder. The caustic soda is of highpurity, containing per cent of NaOH and only cent of NaCl. (The caustic soda of the Castner-Kellner Electrolytic Alkali Co., of Niagara Falls, per cent NaOH.) Chlorates, Sodium Peroxide, etc.—The Societe dElec- trochemie has two plants at St. Michel de Maurienne andat Vallorbe. The principal products are potassium andsodium chlorates, of which 13,000 to 15,000 are made peryear by the Gall and Montlaur process. They also makeannually over 200 tons of peroxide of sodium; this is madebypassing a current of air over metallic sodium enclosed inan electrically-heated platinum tub
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