Extraction process for recovery of acrylic acid
    1.
    发明授权
    Extraction process for recovery of acrylic acid 有权
    萃取法回收丙烯酸

    公开(公告)号:US06737546B2

    公开(公告)日:2004-05-18

    申请号:US10008641

    申请日:2001-11-13

    IPC分类号: C07C5142

    CPC分类号: C07C51/44 C07C51/48 C07C57/04

    摘要: Economical processes are disclosed for recovery and refining of at least acrylic acid from a gaseous mixture such as is obtainable by gas-phase catalytic oxidation of propylene. Processes of the invention include quenching the gaseous mixture with an aqueous quench liquid to obtain an aqueous solution comprising the acid values; contacting the aqueous solution with an immiscible extraction solvent; and an integrated sequence of distillations and phase separations to recover for recycle organic components of the extraction solvent, and obtain valuable acrylic acid and acetic acid products. Advantageously, the immiscible extraction solvent is substantially free of aromatic compounds such as benzene and toluene.

    摘要翻译: 公开的经济方法用于从诸如可通过丙烯的气相催化氧化获得的气体混合物中回收和精炼至少丙烯酸。 本发明的方法包括用水性骤冷液淬火气体混合物以获得包含酸值的水溶液; 使所述水溶液与不混溶的萃取溶剂接触; 以及蒸馏和相分离的一体化顺序,以回收提取溶剂的循环有机组分,并获得有价值的丙烯酸和乙酸产物。 有利地,不混溶的萃取溶剂基本上不含芳族化合物如苯和甲苯。