DIY History | Transcribe | Scholarship at Iowa | 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 29

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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 29

4. Potassium oleate method. (16)

To the almost neutral solution of iron and aluminium salts add an excess of a solution of neutral potassium oleate. Add the latter little by little and [whip?] the solution well after each addition. The oleates of iron and aluminium separate out in a reddish brown mass (color depending upon the amount of iron present). Transfer the precipitate to a filter + wash out the potassium chloride and dry the precipitate for a while, over calcium chloride. Then wash out the oleate of iron by means of a hot solution of petroleum. The aluminium oleate is left upon the filter as a pure white mass. This is ignited directly and the [aluminium?] weighed. 
To determine the iron evaporate the filtrate in a weighed platinum [?] and char and incinerate the residue. 
The precipitated oleates are very slimy and sticky and adhere to anything with which they come in contact. They are transferred only with the greatest difficulty. This is a decided disadvantage. It is

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4. Potassium oleate method. (16) To the almost neutral solution of iron and aluminium salts add an excess of a solution of neutral potassium oleate. Add the latter little by little and [whip?] the solution well after each addition. The oleates of iron and aluminium separate out in a reddish brown mass (color depending upon the amount of iron present). Transfer the precipitate to a filter + wash out the potassium chloride and dry the precipitate for a while, over calcium chloride. Then wash out the oleate of iron by means of a hot solution of petroleum. The aluminium oleate is left upon the filter as a pure white mass. This is ignited directly and the [aluminium?] weighed. To determine the iron evaporate the filtrate in a weighed platinum [?] and char and incinerate the residue. The precipitated oleates are very slimy and sticky and adhere to anything with which they come in contact. They are transferred only with the greatest difficulty. This is a decided disadvantage. It is