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    • 1. 发明专利
    • Oxidant reduction by operation and/or treatment of aqueous acrylonitrile process stream
    • 通过操作和/或处理水性丙烯腈工艺流程减少氧化物
    • JP2009102391A
    • 2009-05-14
    • JP2009011454
    • 2009-01-21
    • Ineos Usa Llcイネオス ユーエスエー エルエルシー
    • GRAHAM ANNE MGODBOLE SANJAY PLEE DANIEL G
    • C07C253/34C07C5/08C07C253/24C07C253/26C07C255/08
    • C07C253/26C07C255/08
    • PROBLEM TO BE SOLVED: To provide a method for reducing oxidant by the operation and/or treatment of an aqueous acrylonitrile process stream. SOLUTION: A method for producing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile is provided, comprising a step of producing a reactor effluent containing the corresponding unsaturated mononitrile, a step of transferring the effluent into a quench column, a step of transferring the resultant effluent into an absorption column, a step of transferring the resultant bottom stream containing the unsaturated mononitrile into a section where the unsaturated mononitrile is retrieved and refined, and a step of improving the efficiency of this method by recirculating at least one aqueous process stream; wherein the improved point comprises a step of treating at least one aqueous stream prior to recirculating it to the process stream to lower its pH, thereby reducing the amount of trace impurities present in the aqueous recycled stream. COPYRIGHT: (C)2009,JPO&INPIT
    • 待解决的问题:提供通过操作和/或处理丙烯腈水溶液流来还原氧化剂的方法。 解决方案:提供一种制备选自丙烯腈和甲基丙烯腈的不饱和单腈的方法,其包括生产含有相应的不饱和单腈的反应器流出物的步骤,将流出物转移到骤冷塔中的步骤 将所得流出物转移到吸收塔中的步骤,将含有不饱和单腈的所得底部物流转移到不饱和单腈被回收和精制的部分中的步骤,以及通过再循环至少一种方法来提高该方法的效率的步骤 含水工艺流; 其中改进点包括在将其再循环到工艺流中以降低其pH之前处理至少一种含水流的步骤,从而减少存在于水性再循环流中的微量杂质的量。 版权所有(C)2009,JPO&INPIT