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    • 7. 发明授权
    • Method for producing lower alkyl acetate
    • 低级烷基乙酸酯的制备方法
    • US5457228A
    • 1995-10-10
    • US330115
    • 1994-10-27
    • Yuichi TokumotoKazuo SakamotoKikuo SasakiIsoo Shimizu
    • Yuichi TokumotoKazuo SakamotoKikuo SasakiIsoo Shimizu
    • C07C67/04
    • C07C67/04Y02P20/584
    • A method for producing a lower alkyl acetate in which undesirable polymerization of the starting material of olefin and deterioration of catalyst can be avoided, a higher catalytic efficiency and a higher reaction rate are attained, the installation of reaction equipment is inexpensive and the operation of the reaction can be carried out without difficulty. The method of the invention comprises the steps of feeding acetic acid and an olefin both in a liquid state and in cocurrent through a continuous flow type fixed bed reactor containing an acidic ion exchange resin catalyst(s) under the conditions that the molar ratio of acetic acid to the olefin in a feed current is in the range of 1.0 to 2.0 and an LHSV of acetic acid relative to the catalyst layer is 0.1 to 10.0 with maintaining the inlet of the catalyst bed at 70.degree. C. to 120.degree. C.; cooling the obtained reaction mixture to a temperature not lower than 70.degree. C.; and recycling it to the catalyst bed.
    • 一种生产低级烷基乙酸酯的方法,其中可以避免烯烃原料的不期望的聚合和催化剂的劣化,更高的催化效率和更高的反应速率,反应设备的安装便宜, 反应可以毫无困难地进行。 本发明的方法包括以下步骤:将乙酸和烯烃以液体状态并通过包含酸性离子交换树脂催化剂的连续流式固定床反应器在乙酸的摩尔比 在进料电流中酸与烯烃的摩尔比在1.0至2.0的范围内,乙酸的相对于催化剂层的LHSV为0.1至10.0,同时保持催化剂床的入口在70℃至120℃。 将得到的反应混合物冷却至不低于70℃的温度。 并将其再循环到催化剂床上。
    • 8. 发明授权
    • Method for preparing p-isobutylstyrene
    • 对异丁基苯乙烯的制备方法
    • US5436402A
    • 1995-07-25
    • US323600
    • 1994-10-17
    • Isoo ShimizuYasuo MatsumuraYuichi TokumotoKazumichi Uchida
    • Isoo ShimizuYasuo MatsumuraYuichi TokumotoKazumichi Uchida
    • C07B61/00C07C5/27C07C5/333C07C7/04C07C7/148C07C15/02C07C15/46
    • C07C15/46C07C5/277C07C5/3335C07C5/3337
    • A method for preparing a high-purity p-isobutylstyrene is here disclosed which comprises the first step of reacting o- and/or m-isobutylethylbenzene, if necessary, together with isobutylbenzene, in the presence of an acid catalyst in a liquid phase at a reaction temperature of -10.degree. to 600.degree. C. so that the production of sec-butylethylbenzene in butylethylbenzene may not exceed 20% by weight, in order to form a mixture of p-isobutylethylbenzene and sec-butylethylbenzene; and the second step of bringing the mixture of p-isobutylethylbenzene and sec-butylethylbenzene recovered from the first step into contact with a dehydrogenation metal catalyst containing at least one metal selected from the groups Ib, IIb, VIa, VIIa and VIII of the periodic table at a reaction temperature of 300.degree. to 650.degree. C. under a reaction pressure of 50 kg/cm.sup.2 or less in a gaseous phase.
    • 这里公开了一种制备高纯度对异丁基苯乙烯的方法,该方法包括如下情况的第一步:在必要时,在酸催化剂存在下,在液相中,在 反应温度为-10℃至600℃,从而在丁基乙基苯中产生仲丁基乙基苯不得超过20重量%,以便形成对异丁基乙基苯和仲丁基乙基苯的混合物; 并且使从第一步骤回收的对异丁基乙基苯和仲丁基乙基的混合物与含有选自元素周期表中的Ib,IIb,VIa,VIIa和VIII族的至少一种金属的脱氢金属催化剂接触的第二步骤 在反应温度为300〜650℃,反应压力为50kg / cm 2以下的气相中。