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The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897

The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897, Page 17

15

results ought to be good. 

3. Electrolytic methods. (9)
(a). From solutions of organic acid (9.a)
(b)      "          "        in phosphoric acid (9.b)

To the nearly neutral solution sufficient ammonium oxalate is added to prevent the formation of a precipitate upon the addition of some [ammonia]. Then an excess of both oxalic acid and ammonium oxalate are added, the former about 2 - 3 grams for each. 1 gram of ferric oxide. The solution is warmed + the current passed through. During the deposition the solution should be kept warm but not boiling. If any of the aluminium should have been [deposited?] the whole deposit must be redissolved in oxalic acid and the process repeated without [?]  the current. The solution should be slightly acid all the time for if alkaline there is a tendency towards the precipitation of ferrous hydrate. If the ammonium carbonate at any time would become greater [? greatly?] than the ammonium oxalate the aluminium is deposited. A current

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15 results ought to be good. 3. Electrolytic methods. (9) (a). From solutions of organic acid (9.a) (b) " " in phosphoric acid (9.b) To the nearly neutral solution sufficient ammonium oxalate is added to prevent the formation of a precipitate upon the addition of some [ammonia]. Then an excess of both oxalic acid and ammonium oxalate are added, the former about 2 - 3 grams for each. 1 gram of ferric oxide. The solution is warmed + the current passed through. During the deposition the solution should be kept warm but not boiling. If any of the aluminium should have been [deposited?] the whole deposit must be redissolved in oxalic acid and the process repeated without [?] the current. The solution should be slightly acid all the time for if alkaline there is a tendency towards the precipitation of ferrous hydrate. If the ammonium carbonate at any time would become greater [? greatly?] than the ammonium oxalate the aluminium is deposited. A current