In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond.. Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds. Two general types of monoalkenes are distinguished: terminal and internal. Also called α-olefins, terminal alkenes are more useful.. However, the International Union of Pure and Applied …

Steam cracking is a petrochemical process in which saturated hydrocarbons are broken down into smaller, often unsaturated, hydrocarbons. It is the principal industrial method for producing the lighter alkenes (or commonly olefins), including ethene (or ethylene) and propene (or propylene).Steam cracker units are facilities in which a feedstock such as naphtha, liquefied …

Terpene [tɛʁˈpeːnə] sind eine große und heterogene Gruppe chemischer Verbindungen mit einer Vielfalt an Kohlenstoffgerüsten, deren gemeinsames Merkmal darin besteht, dass sich ihr Grundgerüst auf Isopren-Einheiten zurückführen lässt.Die Terpene im engen Sinn sind reine Kohlenwasserstoffe, von denen viele natürlich in Organismen vorkommen, oft als sekundäre …