Removal of acetophenone from phenol purification residues
    2.
    发明授权
    Removal of acetophenone from phenol purification residues 失效
    从酚类净化残留物中去除乙炔

    公开(公告)号:US5240568A

    公开(公告)日:1993-08-31

    申请号:US756269

    申请日:1991-08-29

    摘要: A process for separating phenol obtained by the decomposition of cumene hydroperoxide from high boiling impurities, includes the following steps:a) feeding phenol rectification bottoms comprising phenol, acetophenone, cumylphenol, alpha-methylstyrene dimers and high boiler residues to a first phenol freeing distillation column A;b) feeding concentrated bottoms with substantially reduced phenol content from column A to a second residue concentration distillation column B;c) withdrawing a stream rich in compounds boiling between phenol and residue, particularly cumylphenol, from said column B from a point below the feed and returning at least a portion of said stream to said column A at a point above the feed;d) recovering overheads from column A comprising at least 95 weight percent phenol; ande) recovering acetophenone-rich overheads from column B comprising at least 70 weight percent acetophenone.

    摘要翻译: 将由氢过氧化枯烯分解得到的苯酚从高沸点杂质中分离的方法包括以下步骤:a)将苯酚,苯乙酮,枯基苯酚,α-甲基苯乙烯二聚体和高锅炉残余物的苯酚精馏塔底物送入第一酚释放蒸馏塔 一个; b)将具有基本上降低的苯酚含量的浓缩塔底物从塔A进料到第二残余物浓缩蒸馏塔B; c)在进料下方从所述柱B中取出富含苯酚和残留物之间沸腾的化合物,特别是枯基苯酚的物流,并将至少一部分所述物流返回到所述塔A上方的一点; d)从包含至少95重量%苯酚的塔A回收塔顶馏出物; 和e)从包含至少70重量%苯乙酮的柱B回收富含苯乙酮的塔顶馏出物。

    Process for recovery of acetone
    3.
    发明授权
    Process for recovery of acetone 失效
    回收丙酮的方法

    公开(公告)号:US4722769A

    公开(公告)日:1988-02-02

    申请号:US855232

    申请日:1986-04-24

    摘要: This invention is a process for purifying crude acetone obtained by cleavage of cumene hydroperoxide, said crude acetone containing aldehyde impurities and appreciable amounts of unreacted cumene, by fractionally distilling the acetone in a multiple plate distillation column, said process comprising: continuously feeding crude acetone; continuously feeding a dilute aqueous solution of an alkaline material at a point above the crude acetone feed point; and controlling the temperature profile of the column by adjusting the amount of liquid acetone removed in step (c) to maintain a preselected temperature on a plate in the region between the crude acetone feed point and the alkaline material feed point.

    摘要翻译: 本发明是通过在多板蒸馏塔中分馏丙酮来纯化通过裂解氢过氧化枯烯而得到的粗丙酮的方法,所述粗制丙酮含有醛杂质和可观量的未反应的枯烯,所述方法包括:连续送入粗丙酮; 在粗丙酮进料点上方连续供给碱性物质的稀水溶液; 并且通过调节在步骤(c)中除去的液体丙酮的量来维持柱的温度分布,以在粗丙酮进料点和碱性物质进料点之间的区域中保持预选温度。