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    • 88. 发明公开
    • Chloroethylation of aromatic hydrocarbons
    • Verfahren zur Chloroethylierung von aromatischen Kohlenwasserstoffen。
    • EP0356236A2
    • 1990-02-28
    • EP89308597.7
    • 1989-08-24
    • ETHYL CORPORATION
    • Knesel, George Albert
    • C07C22/04C07C17/26C07C57/30
    • C07C51/08C07C17/32C07C51/10C07C22/04C07C57/30
    • An aromatic hydrocarbon is chloroethylated to a 1-­chloro-1-arylethane with minimal co-formation of diaryl­alkane by-product by reacting it with hydrogen chloride and acetaldehyde at a temperature in the range of -10°C to -35°C in the presence of at least about 1.4 mols of hydro­gen sulfate per mol of the aromatic hydrocarbon and in the absence of more than about 15% by weight of water, based on the weight of the hydrogen sulfate. The process is of particular advantage in the chloroethylation of the less reactive aromatic hydrocarbons, such as isobutylbenzene and other monoalkylaromatic hydrocarbons, which have previously yielded an undesirable amount of diarylalkane when chloroethylated with acetaldehyde.
    • 芳族烃被氯乙基化成1-氯-1-芳基乙烷,其中二芳基烷烃副产物在-10℃至-35℃的温度范围内与氯化氢和乙醛反应最少,在 基于硫酸氢盐的重量,每摩尔芳族烃存在至少约1.4摩尔硫酸氢盐,并且在不存在大于约15重量%的水的情况下。 该方法在较少反应性的芳族烃例如异丁基苯和其它单烷基芳族烃的氯乙基化中是特别有利的,当用乙醛氯乙基化时,其已经产生了不需要量的二芳基烷烃。