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    • 6. 发明授权
    • Process for producing acrylic acid
    • 丙烯酸生产工艺
    • US06657080B2
    • 2003-12-02
    • US09878421
    • 2001-06-12
    • Hiromi Yunoki
    • Hiromi Yunoki
    • C07C51235
    • C07C51/252C07C57/04
    • The invention provides a process which, in producing acrylic acid through vapor-phase catalytic oxidation of acrolein-containing gas using a shell-and-tube type fixed bed reactor, can effectively inhibit occurrence of hot spots and produce acrylic acid at high yields. Said process is characterized by dividing each of the reaction tubes into at least three reaction zones in its axial direction, filling the first reaction zone closest to the gas inlet with a catalyst having a higher activity than that of the catalyst filling the adjacent, second reaction zone and filling the subsequent reaction zones with catalysts of different activity levels such that the catalytic activity successively rises from the second reaction zone toward the gas outlet side.
    • 本发明提供了一种通过使用壳管式固定床反应器通过气相催化氧化含丙烯醛气体来生产丙烯酸的方法,其可有效抑制热点的发生并以高产率生产丙烯酸。 所述方法的特征在于将每个反应管在其轴向方向上分成至少三个反应区域,用最接近气体入口的第一反应区填充具有比填充相邻第二反应物的催化剂活性高的催化剂 并用不同活性水平的催化剂填充随后的反应区,使得催化活性从第二反应区向气体出口侧依次升高。