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    PROCESSES FOR PRODUCING ACETIC ACID
    4.
    发明公开
    PROCESSES FOR PRODUCING ACETIC ACID 有权

    公开(公告)号：EP3250545A1

    公开(公告)日：2017-12-06

    申请号：EP15798586.2

    申请日：2015-10-02

    申请人： Celanese International Corporation

    发明人： LIU, Yaw-Haw ,  SCATES, Mark O. ,  SHAVER, Ronald David

    IPC分类号： C07C51/47 ,  C07C53/08

    CPC分类号： C07C51/47 ,  C07C51/12 ,  C07C53/08

    摘要： The disclosure is directed to a carbonylation process for producing acetic acid which includes separating a vapor product stream from a carbonylation reactor to produce a crude acid product comprising acetic acid comprising lithium cations and contacting the crude acetic acid product with a cationic exchanger in the acid form within a first treatment device to produce an intermediate acid product; and contacting the intermediate acetic acid product with a metal-exchanged ion exchange resin having acid cation exchange sites within a second treatment device to produce a purified acetic acid. Embodiments directed to a treatment device comprising a plurality of sampling ports having a first open flow path and a second flow path comprising a porous element are disclosed.

    PROCESS
    6.
    发明公开
    PROCESS 审中-公开
    处理

    公开(公告)号：EP3177588A1

    公开(公告)日：2017-06-14

    申请号：EP15744265.8

    申请日：2015-08-04

    申请人： BP Chemicals Limited

    发明人： HENNIGAN, Sean Anthony

    IPC分类号： C07C51/44 ,  C07C53/08 ,  C07C51/12

    CPC分类号： C07C51/44 ,  C07C51/12 ,  C07C53/08 ,  C07C53/122

    摘要： Method of operating a heavy ends column in an acetic acid production unit having a reaction section, a light ends recovery section including a light ends distillation column, and a heavy ends column. A stream containing acetic acid and propionic acid obtained from the light ends recovery section is fed to the heavy ends column through a feed inlet positioned at an intermediate point in the heavy ends column. A product stream containing acetic acid is withdrawn from the heavy ends column through a sidedraw product outlet position above the feed inlet, and a product stream containing the propionic acid is withdrawn from the heavy ends column through a heavy product outlet positioned below the feed inlet. The pressure in the heavy ends column above the feed inlet is lower than the pressure of the stream containing acetic acid and propionic acid that is fed to the heavy ends column.

    摘要翻译： 一种在乙酸生产单元中操作重尾馏分塔的方法，所述生产单元至少包括反应段，包含轻馏分蒸馏塔的轻馏分回收段和重尾馏分塔，其中包含乙酸和 从轻馏分回收部分获得的丙酸通过位于重馏分塔中间点的进料入口进料至重馏分塔，主要包含乙酸的产物流通过侧馏分产物出口从重馏分塔排出 位置位于进料入口上方，并且包含丙酸的产物料流通过位于进料入口下方的重产物出口从重馏分塔中排出，其中重馏分塔在使得重馏分塔中的压力 进料口上方的压力低于加入到进料口的包含乙酸和丙酸的物流的压力 重尾馏分塔，并且其中重尾馏分塔的顶部压力低于1.0巴，进料入口和侧馏出物出口之间的理论分离阶段的数量至少为5，优选至少7，更优选至少10， 并且进料入口和侧馏出口出口之间的重馏分塔部分中的压降最大为每理论分离阶段10毫巴。

    METHOD FOR PRODUCING ACETIC ACID
    8.
    发明公开
    METHOD FOR PRODUCING ACETIC ACID 有权

    公开(公告)号：EP2937329A4

    公开(公告)日：2016-08-17

    申请号：EP13864464

    申请日：2013-12-02

    申请人： DAICEL CORP

    发明人： SHIMIZU MASAHIKO ,  SAITO RYUJI ,  MIURA HIROYUKI

    IPC分类号： C07C51/12 ,  C07C51/44 ,  C07C53/08

    CPC分类号： C07C51/12 ,  B01D3/40 ,  B01J31/16 ,  C07C51/44 ,  C07C53/08

    摘要： A process for removing acetaldehyde efficiently and producing high-purity acetic acid stably is provided. Methanol is allowed to continuously react with carbon monoxide in a carbonylation reactor 1 in the presence of a catalyst system; the reaction mixture is continuously fed to a flasher 2 to form a volatile phase (2A) containing acetic acid and methyl iodide; the volatile phase (2A) is continuously fed to a splitter column 3 to form an overhead (3A) containing methyl iodide and acetaldehyde and a stream (3B) containing acetic acid; the volatile phase (2A) and/or the overhead (3A) is cooled by a first condenser C1, C3 at a predetermined cooling temperature; and the noncondensed gaseous component is further cooled by a second condenser C2, C4 to form a concentrate having a lower temperature and a higher acetaldehyde concentration. Acetaldehyde is efficiently removed by distilling the concentrate having a high acetaldehyde concentration.