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    VERFAHREN ZUR AUFBEREITUNG VON ABWÄSSERN UND ABGASKONDENSATEN AUS DER POLYMERISATION VON VINYLACETAT UND ETHYLEN IN WÄSSRIGEM MEDIUM
    24.
    发明公开
    VERFAHREN ZUR AUFBEREITUNG VON ABWÄSSERN UND ABGASKONDENSATEN AUS DER POLYMERISATION VON VINYLACETAT UND ETHYLEN IN WÄSSRIGEM MEDIUM 有权
    方法在含水介质中处理废水和排出从凝聚体聚合乙酸乙烯酯和乙烯的

    公开(公告)号：EP2694176A1

    公开(公告)日：2014-02-12

    申请号：EP12724344.2

    申请日：2012-05-31

    申请人： Wacker Chemie AG

    发明人： GUENALTAY, Mehmet ,  WEITZEL, Hans-Peter ,  ECKL, Bernhard

    IPC分类号： B01D3/00 ,  C08F6/00 ,  C02F1/04

    CPC分类号： C02F1/20 ,  B01D3/00 ,  C02F1/00 ,  C02F1/04 ,  C02F2103/38 ,  C08F6/003 ,  C08F6/006 ,  C08J11/02 ,  C08L23/0853

    摘要： The invention relates to a method for processing wastewater and exhaust gas condensates from the polymerization of vinyl acetate and ethylene and optionally other comonomers in an aqueous medium by the suspension or emulsion polymerization method at a pressure of 5 to 100 bar abs., wherein the pressure is relieved to 0.1 to 5 bar abs. after completion of the polymerization of the polymerization base, and optionally treated with inert carrier gases (stripping) and the polymer dispersion is discharged, wherein said method is characterized in that A) during the relieving, the gaseous phase is removed by means of a compressor, B) optionally, the gaseous phase occurring during stripping is removed by the compressor and cooled by one or more heat exchangers before entry into the compressor, and C) the liquid phases occurring in the compressor and optionally in the heat exchanger are separated from the gaseous phase and D) said liquid phases are given to a rectification column, and separated into a vinyl acetate monomer phase and a wastewater phase, and the vinyl acetate monomer phase is resupplied to polymerization.

    KONTINUIERLICHES POLYMERISATIONSVERFAHREN
    27.
    发明公开
    KONTINUIERLICHES POLYMERISATIONSVERFAHREN 有权

    公开(公告)号：EP2178928A1

    公开(公告)日：2010-04-28

    申请号：EP08787077.0

    申请日：2008-08-11

    申请人： Wacker Chemie AG

    发明人： WEITZEL, Hans-Peter ,  BRAUNSPERGER, Robert

    IPC分类号： C08F6/00 ,  C08F2/22 ,  C08F210/02 ,  C08F218/04

    CPC分类号： C08F6/003 ,  B01J19/1862 ,  B01J2219/00092 ,  B01J2219/00094 ,  C08F210/02 ,  C08F218/08 ,  C08L23/0869 ,  C08L31/02 ,  C08F2/001 ,  C08F2/22

    摘要： The invention provides a process for preparing polymers based on vinyl ester, ethylene and optionally further comonomers in the form of aqueous polymer dispersions thereof or of water-redispersible polymer powders by means of free-radically initiated continuous emulsion polymerization and optionally drying of the resulting polymer dispersions, characterized in that the emulsion polymerization is carried out in a cascade comprising at least one upstream heat exchanger and at least two downstream pressurized stirred tank reactors connected in series, such that the conversion on leaving the heat exchanger is at least 10% of the overall polymerization conversion.

    摘要翻译： 本发明提供了一种基于乙烯基酯，乙烯和任选的其聚合物水分散体形式的其他共聚单体或水再分散性聚合物粉末形式的聚合物的方法，该方法通过自由基引发的连续乳液聚合和任选地干燥所得聚合物 其特征在于乳液聚合在包括至少一个上游热交换器和至少两个串联连接的下游加压搅拌釜反应器的级联中进行，使得离开热交换器时的转化率为至少10％ 整体聚合转化。