MANUFACTURE OF CHEMICALS BY ELECTROLYSIS

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MANUFACTURE OF CHEMICALS BY ELECTROLYSIS ( manufacture-chemicals-by-electrolysis )

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FLUORINE 39 The hydrofluoric acid is contained in a copper vessel B, the inner surface of which C acts as cathode and the top of which is closed by a copper lid M, from which it is in- sulated by a rubber ring L and also by rubber insulation round the bolts, b. The large outer vessel S contains a freezing mixture. A. copper tube A, perforated round the lower part by a number of small holes d, serves as a diaphragm to separate the cathode from the anode p, which is of platinum attached to the inner copper tube T. The tube T communicates with the upper vessel N, which also contains a cooling mixture, and the lower end of this anode vessel T is closed by a copper plate g, which is fastened on by screws v. The diaphragm is in electrical connection with the anode p and at first, when electrolysis has commenced, it becomes coated with a deposit of copper fluoride, but then, being insulated by this deposit, it acts as a true diaphragm, and fluorine is discharged only from the anode. Copper tubes H and E serve to carry away the evolved hydrogen and fluorine.

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