International Library of Technology; A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, or for Those Who Desire Information Concerning Them Volume 18

International Library of Technology; A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, or for Those Who Desire Information Concerning Them Volume 18

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...The lead alloy, which contains from 23 to 25 per cent. of sodium, may be sold directly for many uses where metallic sodium is required. It is usually, however, treated with water, and by suitable working, a strong solution of caustic soda of a high degree of purity is obtained. This caustic requires very little fuel for its evaporation, and for this reason is much better than the more dilute caustic obtained by many processes. The lead is left by this operation as a spongy mass, and together with considerable lead peroxide that is also formed, it makes a valuable by-product. This process was considered so promising in 1899, that a company was formed with a capital of over 1500,000, and works, which are still in successful operation, were erected at Clavaux, France, for carrying out this method. THE ACKER PROCESS 92. The Acker electrolytic process, which is at present in successful operation at Niagara Falls, differs from the above in that it uses fused lead as the cathode and continuously removes the sodium from the sodiumlead 4alloy, so that the lead can be used continuously. The apparatus for carrying out this process is shown in Fig. 21. It consists of an iron base a embedded in brickwork b, which rest on brick pillars c, or it rests on the ground and has places excavated for the parts projecting below the surface. The upper part consists of slabs d of acid-resisting slate or is made of fireclay. These slabs are carefully luted into the iron shoulders, as shown, by using fireclay. Through the top cover project the graphite anodes e, e, e, while atis provided a charging hole for fresh salt. At g is molten salt and at // an alloy of molten lead and sodium. At /is a pipe for conducting away the chlorine. At/is a pipe for blowing in steam;...show more

Product details

  • Paperback | 166 pages
  • 189 x 246 x 9mm | 308g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236891090
  • 9781236891099