cracking

cracking
1. A general term covering any of a variety of reactions and processes that convert high boiling fractions to more valuable lower boiling fractions.
2. A secondary refining process that uses heat and/or a catalyst to break down large chemical components into smaller, lighter ones which can be used as blending components for fuels.
3. Process carried out in a refinery reactor in which the large molecules in the charge stock are broken up into smaller, lower-boiling, stable hydrocarbon molecules, which leave the vessel overhead as unfinished cracked gasoline, kerosines, and gas oils. At the same time, certain of the unstable or reactive molecules in the charge stock combine to form tar or coke bottoms. The cracking reaction may be carried out with heat and pressure (thermal cracking) or in the presence of a catalyst (catalytic cracking).

Petroleum refining glossary. 2013.

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  • cracking — [ krakiŋ ] n. m. • 1922; mot angl., de to crack « briser » ♦ Anglic. Craquage. ● craquage ou cracking nom masculin (anglais cracking, de to crack, briser) Ensemble des procédés de conversion qui transforment, sous l action de la température… …   Encyclopédie Universelle

  • Cracking FC — Cette page a été supprimée. Le journal des suppressions et des déplacements est affiché ci dessous pour référence. 24 septembre 2009 à 15:56 Supertoff (discuter | contributions) a supprimé « Cracking FC » ‎ (Critères d'admissibilité non… …   Wikipédia en Français

  • Cracking — may refer to: Cracking, the formation of a fracture or partial fracture in a solid material Fluid catalytic cracking, a catalytic process widely used in oil refineries for cracking large hydrocarbon molecules into smaller molecules Cracking… …   Wikipedia

  • Cracking — Saltar a navegación, búsqueda Cracking puede referirse a: En química, cracking o craqueo es la descomposición de una molécula compleja en otras más pequeñas. En informática, puede referirse a varias prácticas similares, o al conjunto de ellas:… …   Wikipedia Español

  • Cracking — ist die Tätigkeit, ein Computerprogramm zu analysieren (meist durch Disassemblieren), um den Kopierschutz zu entfernen. Ein Crack ist ursprünglich die Kopie eines Computerprogramms, bei der ein herstellermäßig angebrachter Kopierschutz entfernt… …   Deutsch Wikipedia

  • cracking — n. 1. the act of cracking something. Syn: fracture, crack. [WordNet 1.5] 2. (Chem.) the process of making lower molecular weight hydrocarbons from heavier hydrocarbons in petroleum, by exposure to heat and catalysts. It is used to convert heavier …   The Collaborative International Dictionary of English

  • cracking — adj. same as {groovy}, sense 1. [informal] Syn: bang up, bully, cool, corking, dandy, great, groovy, keen, neat, nifty, not bad(predicate), peachy, slap up, swell, smashing. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • cracking — ► ADJECTIVE Brit. informal 1) excellent. 2) fast and exciting: a cracking pace …   English terms dictionary

  • cracking — (ingl.) m. Craqueo. * * * ► masculino INGENIERÍA QUÍMICA Craqueo …   Enciclopedia Universal

  • Cracking —   [engl.], Knacken …   Universal-Lexikon

  • cracking — / krækiŋ/, it. / krɛking/ s. ingl. [der. di (to ) crack spezzare ], usato in ital. al masch. (industr.) [scissione termica degli idrocarburi, che si inserisce nel ciclo della lavorazione del petrolio grezzo] ▶◀ piroclasi, pirolisi, piroscissione …   Enciclopedia Italiana

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