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    • 2. 发明授权
    • Method for preventing effluent gas pipe from blocking
    • 防止排气管阻塞的方法
    • US06566551B2
    • 2003-05-20
    • US09724468
    • 2000-11-29
    • Takeshi NishimuraYukihiro MatsumotoSei NakaharaMisao InadaHarunori HiraoMamoru Takamura
    • Takeshi NishimuraYukihiro MatsumotoSei NakaharaMisao InadaHarunori HiraoMamoru Takamura
    • C07C5116
    • C07C51/252C07C57/04
    • For use in a process for the production of (meth)acrylic acid comprising at least a step for the reaction of (meth)acrylic acid by catalytic gas phase oxidation and a step for the absorption thereof, a method for preventing an effluent gas pipe from blocking is disclosed, which method is characterized by causing part or the whole of the gas discharged from the step for absorption, while being circulated via the effluent gas pipe to the step for the reaction or being discarded, to be subjected to temperature elevation and application of pressure and/or mist separation. Particularly by setting the temperature of the waste gas from the absorption column at a level in the range of 30-70° C., it is made possible to decrease the contents of water, low boiling substances, and subliming substances entrained by the waste gas and, coupled with the temperature elevation and the application of pressure implemented in the effluent gas pipe, attain effective prevention of the interior of the effluent gas pipe from blockage and corrosion.
    • 为了用于生产(甲基)丙烯酸的方法,至少包括通过催化气相氧化反应(甲基)丙烯酸的步骤和用于吸收的步骤,用于防止流出气体管道的方法 公开了这种方法,其特征在于,使得从步骤吸收的气体的一部分或全部通过废气管循环到用于反应或被丢弃的步骤中,以进行升温和施加 的压力和/或雾分离。 特别是通过将来自吸收塔的废气的温度设定在30〜70℃的范围内,能够降低水,低沸点物质和由废气夹带的升华物质的含量 再加上在排气管道中实施的温度升高和施加压力,有效防止排气管内部堵塞和腐蚀。