olefine|olefines in English

noun

['əʊləfɪn]

alkene (Chemistry)

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1. Use of naturally acid smectites to remove olefines from aromatics or aromatic mixtures

2. In organic chemistry, an Alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond

3. This invention relates to a catalyst suitable for the epoxidation of olefine having no allylic hydrogen, in particular for the preparation of ethylene oxide, which catalyst comprises a catalytically effective amount of silver, a promoting amount of alkalimetal, a promoting amount of a heteropolyoxometalate of tungsten and/or molybdenum and optionally, a promoting amount of rhenium and/or a promoting amount of a rhenium co-promoter selected from sulphur, molybdenum, tungsten, chromium, phosphorus, boron and mixtures thereof, supported on a porous, refractory support.