butene


butene
/byooh"teen/, n. Chem.
butylene (def. 1).
[BUT(YL) + -ENE]

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also called  Butylene,  

      any of four isomeric compounds belonging to the series of olefinic hydrocarbons. The chemical formula is C4H8. The isomeric forms are 1-butene, cis-2-butene, trans-2-butene, and isobutylene. All four butenes are gases at room temperature and pressure.

      Butenes are formed during the cracking (breaking down of large molecules) of petroleum to produce gasoline; they can also be prepared commercially by the catalytic dehydrogenation (elimination of hydrogen atoms from the molecule) of butanes. The major part of the butenes is utilized for the production of octanes, which are important constituents of gasoline. This is done either by causing the butenes to react with isobutane or by dimerizing (combining two molecules of) butenes to form octenes, which, on hydrogenation (addition of hydrogen atoms to molecules), yield octanes. On treatment with water in the presence of catalysts, the butenes are transformed into secondary and tertiary butyl alcohols, which are used as commercial solvents. On dehydrogenation, normal butenes form butadiene, the principal starting material for synthetic rubber.

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Universalium. 2010.

Look at other dictionaries:

  • Butene — (auch Butylene) sind eine Gruppe von vier isomeren Kohlenwasserstoffen mit der allgemeinen Summenformel C4H8, die über eine C–C Doppelbindung verfügen. Sie zählen damit zu den Alkenen. Zwei der Isomere unterscheiden sich durch cis trans Isomerie …   Deutsch Wikipedia

  • Butene — Butène Le butène (ou butylène) C4H8 est un gaz incolore et sans odeur, deux fois plus lourd que l air, soluble dans les solvants organiques polaires (hydrocarbures). Il s enflamme à 440 °C. Sommaire 1 Isoméres 2 Obtention 3 Utilisations …   Wikipédia en Français

  • Butene — Butene, also known as butylene, is an alkene with the formula C4H8. It is a colourless gas that is present in crude oil as a minor constituent in quantities that are too small for viable extraction. It is therefore obtained by catalytic cracking… …   Wikipedia

  • butène — [ bytɛn ] n. m. • 1845; du rad. de but(ylique) et suff. chim. ène ♦ Chim. Hydrocarbure éthylénique C4 H8. ⇒vieilli butylène. ● butène nom masculin Hydrocarbure éthylénique, C4H8, dont il existe trois isomères, le butène 1 et les butènes 2 cis et… …   Encyclopédie Universelle

  • Butene — Butene,   Singular Buten das, s, Butylene, ungesättigte Kohlenwasserstoffe aus der Gruppe der Alkene, die sich von den Butanen ableiten. Sie treten meist als Gemisch der drei Isomeren 1 Buten, 2 Buten und Isobuten …   Universal-Lexikon

  • butene — utene n. any of three isomeric singly unsaturated hydrocarbons {C4H8}; all are used in making synthetic rubbers; called also {butylene}. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • butene — [byo͞o′tēn΄] n. BUTYLENE …   English World dictionary

  • Butène — Le butène (ou butylène) C4H8 est un gaz incolore et sans odeur, deux fois plus lourd que l air, soluble dans les solvants organiques polaires (hydrocarbures). Il s enflamme à 440 °C. Sommaire 1 Isomères 2 Obtention 3 Utilisations …   Wikipédia en Français

  • butene — noun any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers • Syn: ↑butylene • Hypernyms: ↑gas • Hyponyms: ↑isobutylene, ↑polybutylene, ↑polybutene * * * ˈbyüd.ēn …   Useful english dictionary

  • butene — Butylene Bu ty*lene, n. [From {Butyl}.] 1. (Chem.) Any one of three metameric hydrocarbons, {C4H8}, of the ethylene series. They are gaseous or easily liquefiable; called also {butene}. [1913 Webster] 2. the hypothetical divalent radical { (CH2)4 …   The Collaborative International Dictionary of English


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