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OHAPTEE III. NITBIO ACID. HYDEOXYLAMINE. HYDROSULPHITE FLTJOEINE. NITEIO ACID can be separated from the alkali nitrate 1 present in peat by a process devised by M. A. Nodon, a French engineer. The peat deposits are treated in situ by electrolysis, and the nitric acid which is discharged at the anodes is drained away to a collecting tank. Earthen- ware pots, having a depth of approximately 8 feet and a diameter of 16 inches, are sunk in the peat deposit and serve as anode compartments. Each pot is packed with coke in the centre of which is embedded a central graphite anode, and it also contains two earthenware tubes, one for drawing off the nitric acid solution as formed d (Fig. 8), and the other e to supply water in order to make good that which is carried off to the nitric acid tank. Corresponding to each anode cell are four cast iron cathodes KK, about 8 feet long, which are connected as shown in Fig. 9. A continuous production of acid takes place during electrolysis, and no harmful effect is exerted upon the nitrifying bacteria, which continue their work of converting nitrogenous matter into calcium nitrate without interruption. Stakes of tarred wood g 1 Q. Dary, LondonElectrical Beview, 1913, 73, 1020; Met and Chem. Eng., 1914,12,107. (30)PDF Image | MANUFACTURE OF CHEMICALS BY ELECTROLYSIS
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