The Chemical World; A Monthly Journal of Chemistry and Chemical Engineering Volume I-III, 1912-1914 Volume 1

The Chemical World; A Monthly Journal of Chemistry and Chemical Engineering Volume I-III, 1912-1914 Volume 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...permanganate to flow slowly through it. This regenerates the Permutit, yielding up its oxygen to it and making it highly active again. This is the analogous process to the regeneration by salt, in the case of Sodium-Permutit in water softening. This property which Manganese Permutit has, of as-similating oxygen and yielding it up again readily, has. been turned to account on an industrial scale for the removal of iron from waters, for the removal of manganese in any form from waters, and for the sterilisation of water. Suppose we have a filter filled with Manganese-Permu.it, and we filter water containing iron through it. The iron is oxidised by the high oxides of manganese which are precipitated in the Permutit. Oxide of iron is thereby precipitated in the upper layers of the filter bed, and a water chemically free from iron passes through. There are no traces left, and the water is not only, as we say, commercially free from iron, but absolutely so. In time, of course, if we pour more iron solution through, we should use upall the oxygen from the active oxidation material, and we would then have to regenerate. In practice the filters are all built of a pressure type with stirrers inside to prevent" choking up by the precipitate of iron. In form the filters are practically the same as the softeners, there being the usual regeneration tank, this time for KMnO, . Vhen regeneration is necessary we have first to close the inlet cocks and wash from the bottom upwards for some time, thus washing away the accumulated mud of iron oxide. When the outflow is clear we begin regenerating, allowing the KMnO, solution to flow slowly through the bed. At first the outflowing liquid will be quite clear and colourless. This indicates that the potassium...show more

Product details

  • Paperback | 320 pages
  • 189 x 246 x 17mm | 572g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236543610
  • 9781236543615