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    • 7. 发明授权
    • Process for producing (meth)acrolein or (meth)acrylic acid
    • 制备(甲基)丙烯醛或(甲基)丙烯酸的方法
    • US07067696B2
    • 2006-06-27
    • US10863511
    • 2004-06-09
    • Yasuyuki SakakuraShuhei YadaHirochika HosakaYasushi OgawaYoshiro Suzuki
    • Yasuyuki SakakuraShuhei YadaHirochika HosakaYasushi OgawaYoshiro Suzuki
    • C07C51/16C07C45/35
    • C07C51/235C07C45/35C07C51/25C07C47/22C07C57/04
    • In the process for producing (meth)acrolein or (meth)acrylic acid, which comprises feeding a raw material of the (meth)acrolein or (meth)acrylic acid, and a molecular oxygen-containing gas mixed with a diluting gas and compressed by a compressor, to an oxidation reactor to conduct a catalytic gas-phase oxidation reaction therebetween; feeding the obtained reaction gas to an absorption column to contact with water; recovering an aqueous solution of the (meth)acrolein or (meth)acrylic acid from a bottom of the absorption column and an exhaust gas from a top of the absorption column; and recycling a part or whole of the thus recovered exhaust gas to use as the diluting gas, the temperature of the mixed gas at a suction inlet of the compressor is controlled to a temperature higher than a dew point thereof. According to the process of the present invention, the compressor is prevented from suffering from clogging or damage thereto.
    • 在制备(甲基)丙烯醛或(甲基)丙烯酸的方法中,其包括将(甲基)丙烯醛或(甲基)丙烯酸的原料和与稀释气体混合的含分子氧的气体进料并由 一个压缩机,到一个氧化反应器,在它们之间进行催化气相氧化反应; 将获得的反应气体进料到吸收塔以与水接触; 从吸收塔的底部回收(甲基)丙烯醛或(甲基)丙烯酸的水溶液和来自吸收塔的顶部的废气; 并且将这样回收的废气的一部分或全部再循环用作稀释气体,将压缩机的吸入口处的混合气体的温度控制在高于其露点的温度。 根据本发明的方法,防止压缩机堵塞或损坏压缩机。