Nghĩa của từ olefine bằng Tiếng Sec
olefín Entry edited by: B2
Đặt câu có từ "olefine"
1. In organic chemistry, an Alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond
2. 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.