Watts' Manual of Chemistry, Theoretical and Practical (Based on Fownes' Manual); Chemistry of Organic Carbon-Compounds Or, Organic Compounds

Watts' Manual of Chemistry, Theoretical and Practical (Based on Fownes' Manual); Chemistry of Organic Carbon-Compounds Or, Organic Compounds

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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. 1886 edition. Excerpt: ...which melts at 38. Physetoleic acid, a crystalline acid obtained from sperm-oil, is isomeric, if not identical, with hypogseic acid: it melts at 30, and solidifies at 28. Oleic Acid, CtgHOg.--This acid, the most important of the series, is obtained by saponification of olein, the fluid constituent of most natural fats and fixed oils. To obtain pure oleic acid, olive or almond oil is saponified with potash; the soap is decomposed by tartaric acid; and the separated fatty acid, after oeing washed, is heated for some hours in the waterbath, with half its weight of lead oxide previously reduced to fine powder. The mixture is then well shaken up with about twice its bulk of ether, which dissolves the oleate of lead, and leaves the etearate; the liquid, after standing for some time, is decanted and mixed with hydrochloric acid; the oleic acid thereby eliminated dissolves in the ether; and the ethereal solution which rises to the surface of the water is decanted, mixed with water, and freed from ether by distillation. Large quantities of crude oleic acid are now obtained in the manufacture of stearine candles, by treating with dilute sulphuric acid the lime soap resulting from the action of lime upon tallow The fatty acids resulting from the decomposition are washed with hot water, and solidify in a mass on cooling; and this mass, when subjected to pressure, yields a liquid rich in oleic acid, but still retaining a considerable quantity of stearic acid. After remaining for some time in a cold place, it deposits a quantity of solid matter, and the liquid decanted from this is sent into the market as oltic acid or red oil. It may be purified by the process just described. Oleic acid crystallises from alcoholic solution in dazzling white needles, melting...show more

Product details

  • Paperback | 248 pages
  • 189 x 246 x 13mm | 449g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236549716
  • 9781236549716