Coal Tar
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Encyclopaedia Britannica (11th ed.) article on coal-tar, covering its origin as a by-product of coal-gas and coke-oven manufacture, its composition, and its uses in the crude state (fuel, paint, roofing-felt, lamp-black). Most of the article describes fractional distillation in tar-stills and condensers, and the working up of the light, middle, creosote and anthracene oil fractions into benzene, naphthalene, carbolic acid, pyridine bases, creosote and anthracene (for alizarine). It also gives a short history of the industry (Mansfield, Hofmann, Perkin) and a bibliography. Three figures show a tar-still, a condensing worm and a benzol still.
- Type
- Article
- Date
- 1911
- Language
- English
- Pages
- 5
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From Ralph Griswold's Digital Archive, delivered by the University of Arizona.
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