Process for preparing acrylic acid
    25.
    发明授权
    Process for preparing acrylic acid 有权
    制备丙烯酸的方法

    公开(公告)号:US07566804B2

    公开(公告)日:2009-07-28

    申请号:US12020264

    申请日:2008-01-25

    IPC分类号: C07C51/42 C07C51/16

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

    摘要: A process for preparing acrylic acid, in which an acrylic acid-comprising product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid is fractionally condensed in a condensation column provided with internals ascending into itself with side draw removal of crude acrylic acid and with liquid phase draw removal of acrylic acid-comprising acid water, and acrylic acid present in acid water is taken up into an extractant and then removed from the extractant and recycled into the condensation column, or taken up in aqueous metal hydroxide, or sent to further purification of the crude acrylic acid.

    摘要翻译: 制备丙烯酸的方法,其中通过丙烯酸的C3前体的催化气相部分氧化获得的含丙烯酸的产物气体混合物在冷凝塔中分级冷凝,所述内部装有自身上升的侧向抽出粗品 丙烯酸和含丙烯酸的酸性水的液相萃取和酸性水中存在的丙烯酸被吸收到萃取剂中,然后从萃取剂中除去并循环到冷凝柱中,或者被吸收在金属氢氧化物水溶液中, 或者进一步纯化粗丙烯酸。