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单词 olefin
释义

Definition of olefin in English:

olefin

(also olefine)
noun ˈəʊlɪfɪnˈoʊləfən
Chemistry
  • another term for alkene
    Example sentencesExamples
    • Activator solid support for metallocene catalysts in the polymerization of olefins, a process for preparing such a support, and the corresponding catalytic system and polymerization process
    • Such investment will be made in the production of plastic pellets, olefins, and aromatics.
    • I've never done an olefin metathesis reaction, which means that the trend started without me and will leave without me.
    • In addition, the isomerization of olefins with small molecular weight in glassy solvent at 77 K have been proposed to proceed by H-T mechanism.
    • Whatever the feedstock, the product slate is a complex mixture of hydrogen, ethylene, other olefins, diolefins and gasoline as well as smaller amounts of acetylenes and carbon monoxide.
    • By use of the present invention it is possible to produce an olefin polymer with high stereoregularity, broad molecular weight distribution, and good fluidity, at high rates of yield.
    • The company said the quarter saw a decline in international prices of olefins, polymer as well as fibre-intermediate on the back of weaker crude oil prices compared with the trailing quarter.
    • It is preferred that the top membrane portion and the base membrane portion are made from thermoplastic olefin material or polyvinyl chloride material.
    • Sharpless had begun his investigations into the oxidation of olefins after starting work as an assistant professor at the Massachusetts Institute of Technology in 1970.
    • The material is a thermoplastic olefin nanocomposite.
    • Process for selective hydrogenation of highly unsaturated compounds and isomerization of olefins in hydrocarbon streams
    • Process for the preparation of an olefin polymer using metallocenes having specifically substituted indenyl ligands
    • Thermoplastic olefin was considered instead of the vinyl substrate covering.
    • Classes of polymers used in integrated optics include acrylates, polyimides, polycarbonates, and olefins.
    • The second phase comprises an organic solvent containing soluble reagents such as olefins.
    • For the pathway of cis-trans isomerization of olefins, we suggest distinguishing conjugated olefins (including stilbenes) of little polarity from other cases.
    • The device has three injection-molded elements made of a cyclic olefin copolymer: the lid, a mixing chamber and a delivery cartridge.
    • There are four large plants here - Qenos resins, plastics, elastomers and olefins.
    • Ethylene, a two-carbon olefin, is a volatile hormone in higher plants.
    • Epoxidation, the conversion of an olefin (an unsaturated alkene hydrocarbon) to a cyclic ether through reaction with hydrogen peroxide, a peracid, or oxygen, is an important chemical technique.

Derivatives

  • olefinic

  • adjective ˌəʊlɪˈfɪnɪkˌoʊləˈfɪnɪk
    Chemistry
    • A number of artificial electron acceptors for reduced OYE has been identified including the olefinic double-bond of, ß-unsaturated ketones and aldehydes.
      Example sentencesExamples
      • Here, a given lipid is assigned a coordinate in N-T space as dictated by the length of the chain on either side of the olefinic bond.
      • A metabolic epoxidation of the double bond in olefinic structures as shown in the case of vinyl chloride has been regarded as the common principle leading to their mutagenic and carcinogenic activities.
      • Process for selectively separating hydrogen, or both hydrogen and carbon monoxide from olefinic hydrocarbons
      • Essential oil hydrocarbons are usually olefinic and made up of isoprene units: terpenes, sesquiterpenes and diterpenes.
      • Structurally, morphine exhibits the complexity and multifunctionality typical of so many alkaloids; its benzylisoquinoline nucleus supports amino, hydroxyl, olefinic and ether functions in a pentacyclic system.

Origin

Mid 19th century: from French oléfiant 'oil-forming' (with reference to oily ethylene dichloride).

 
 

Definition of olefin in US English:

olefin

(also olefine)
nounˈoʊləfənˈōləfən
Chemistry
  • another term for alkene
    Example sentencesExamples
    • Ethylene, a two-carbon olefin, is a volatile hormone in higher plants.
    • Such investment will be made in the production of plastic pellets, olefins, and aromatics.
    • For the pathway of cis-trans isomerization of olefins, we suggest distinguishing conjugated olefins (including stilbenes) of little polarity from other cases.
    • The device has three injection-molded elements made of a cyclic olefin copolymer: the lid, a mixing chamber and a delivery cartridge.
    • In addition, the isomerization of olefins with small molecular weight in glassy solvent at 77 K have been proposed to proceed by H-T mechanism.
    • The second phase comprises an organic solvent containing soluble reagents such as olefins.
    • Sharpless had begun his investigations into the oxidation of olefins after starting work as an assistant professor at the Massachusetts Institute of Technology in 1970.
    • Whatever the feedstock, the product slate is a complex mixture of hydrogen, ethylene, other olefins, diolefins and gasoline as well as smaller amounts of acetylenes and carbon monoxide.
    • Process for selective hydrogenation of highly unsaturated compounds and isomerization of olefins in hydrocarbon streams
    • The company said the quarter saw a decline in international prices of olefins, polymer as well as fibre-intermediate on the back of weaker crude oil prices compared with the trailing quarter.
    • By use of the present invention it is possible to produce an olefin polymer with high stereoregularity, broad molecular weight distribution, and good fluidity, at high rates of yield.
    • Process for the preparation of an olefin polymer using metallocenes having specifically substituted indenyl ligands
    • There are four large plants here - Qenos resins, plastics, elastomers and olefins.
    • Classes of polymers used in integrated optics include acrylates, polyimides, polycarbonates, and olefins.
    • Activator solid support for metallocene catalysts in the polymerization of olefins, a process for preparing such a support, and the corresponding catalytic system and polymerization process
    • The material is a thermoplastic olefin nanocomposite.
    • I've never done an olefin metathesis reaction, which means that the trend started without me and will leave without me.
    • It is preferred that the top membrane portion and the base membrane portion are made from thermoplastic olefin material or polyvinyl chloride material.
    • Thermoplastic olefin was considered instead of the vinyl substrate covering.
    • Epoxidation, the conversion of an olefin (an unsaturated alkene hydrocarbon) to a cyclic ether through reaction with hydrogen peroxide, a peracid, or oxygen, is an important chemical technique.

Origin

Mid 19th century: from French oléfiant ‘oil-forming’ (with reference to oily ethylene dichloride).

 
 
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更新时间:2024/12/23 20:34:18