1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ETHYLENE, or ETHENE, C2H<, or H2C:CH3, the first representative of the series of olefine hydrocarbons, is found in coal gas. It is usually prepared by healing a mixture of ethyl alcohol and sulphuric acid. G. S. Newth (Jour. Chem. Soc., 1901, 79, p. 915) obtains a purer product by dropping ethyl alcohol into syrupy phosphoric acid (sp. gr. 1-75) warmed to 200° C., subsequently raising the temperature to 220° C. It can also be obtained by the action of sodium on ethylidene chloride (B. Tollens, Ann., 1866, 137, p. 3…
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- Vol. 9, pp. 851-851