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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 43

[page]41[/page]

In some cases the increase of weight was due to the presence of [?chromium?aluminium?dryness?] so this was [?detected?] by dissolving the ignited oxide in dilute hydrochloric acid and boiling this solution with caustic soda. [?Theron?] was precipitated and the aluminium was hydrated out into solution. The precipitate was filtered and washed adn the filtrate acidified with hydrochloric acid. Ammonia was then added and [?washed gelatinous?] precipitate denoted the aluminium.
     Finally good results were obtained and the method was abandoned. The time required for the separation is quite considerable. It has the advantage, though, that it requires no further attention, after once starting it, then to [?moisten?] the residue and disolving it. After that the regular [?wash comes?]. While the evaporation is going on other work may be carried on. To insure the complete separation, if the [?iron?] results are high, dissolve the weighed [?inserted?](better metric)[?/inserted?] ferric oxide in dilute hydrochloric acid and repeat the separation. By this second treatment every trace of aluminium may be separated. [?Unless?] the iron has been completely converted into the

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[page]41[/page] In some cases the increase of weight was due to the presence of [?chromium?aluminium?dryness?] so this was [?detected?] by dissolving the ignited oxide in dilute hydrochloric acid and boiling this solution with caustic soda. [?Theron?] was precipitated and the aluminium was hydrated out into solution. The precipitate was filtered and washed adn the filtrate acidified with hydrochloric acid. Ammonia was then added and [?washed gelatinous?] precipitate denoted the aluminium. Finally good results were obtained and the method was abandoned. The time required for the separation is quite considerable. It has the advantage, though, that it requires no further attention, after once starting it, then to [?moisten?] the residue and disolving it. After that the regular [?wash comes?]. While the evaporation is going on other work may be carried on. To insure the complete separation, if the [?iron?] results are high, dissolve the weighed [?inserted?](better metric)[?/inserted?] ferric oxide in dilute hydrochloric acid and repeat the separation. By this second treatment every trace of aluminium may be separated. [?Unless?] the iron has been completely converted into the