Industries and Iron Volume 10

Industries and Iron Volume 10

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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. 1891 edition. Excerpt: ...them from the lycerine, excess of water, &c. Potash soaps cannot, owever, be separated from solution by the corresponding tassium salt, whilst, on the other hand, sodium ch oride reacts chemically therewith, forming a soda soap and potassium chloride. Soaps made from cocoanut or palmnut oil require more salt to precipitate them from solution than do those made from other oils or fats, as the sodium salt of lauric acid, which forms the rincipal constituent of these oils, is somewhat solubxle in brine, and hence cocoanut and palmnut oil soaps are largely used at sea, under the name of " marine soap." Materiala.--The materials used in the manufacture of soap, of one kind or another, are extremely various, there bein hardly any form of animal or vegetable oil or grease whic has not been, or cannot be, so employed. A detailed description of even a few of these is beyond the scope of these articles, but amon the more important may be mentioned tallow, lard, pa m oil--of which large quantities are now used---palm-kemel, cocoanut, cottonseed, linseed, and castor oils; besides rosin, bone fat, kitchen grease, and free fatty acids, such as oleic acid, obtained from candle works, or recovered from various kinds of waste liquors. Tallow is largely employed in conjunctionwith rosin for the manufacture of hard yellow soap, although it is now, to some extent, superseded by palm oil. This oil, which is obtained from the outer fleshy coating of the fruit of several species of palm, consists rincipally of tripalmitin and triolein, and when broug t to this country has a colour ranging from dark yellow to deep red. It also varies enormously in quality, the oil from some localities containing not more than 1 or 2 per cent. of impurities, whilst...
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Product details

  • Paperback | 1128 pages
  • 189 x 246 x 56mm | 1,969g
  • United States
  • English
  • black & white illustrations
  • 1236795458
  • 9781236795458