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    Spent caustic (pre)treatment process
    3.
    发明授权
    Spent caustic (pre)treatment process 失效
    废碱（预处理）处理过程

    公开(公告)号：US5885422A

    公开(公告)日：1999-03-23

    申请号：US807873

    申请日：1997-02-26

    申请人： Sabah A. Kurukchi ,  Joseph M. Gondolfe

    发明人： Sabah A. Kurukchi ,  Joseph M. Gondolfe

    IPC分类号： B01D3/14 ,  B01D3/38 ,  C10G19/08 ,  B01D11/04

    CPC分类号： C10G19/08 ,  B01D3/143 ,  B01D3/38

    摘要： A process for pretreating a spent caustic stream prior to oxidation includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent caustic raffinate containing only residual amounts of organic solute. The raffinate is steam distilled to remove the residual organic solutes, yielding a pretreated spent caustic stream substantially free of organic material. The pretreated spent caustic is suitable for use in a Kraft paper process or for oxidation prior to recycle or disposal. Solvent extract from the extractor is regenerated in a solvent regenerator having an overhead stream for purging light ends, a bottom stream for purging heavy ends, and a heart-cut side stream for recycling solvent to the extractor. Alternatively, solvent may be taken as a cut from an existing plant process stream, once passed through the multi-stage solvent extraction unit, and then returned to the processing unit of the plant from which it was taken.

    摘要翻译： 用于在氧化之前预处理废碱液的方法包括使用溶剂从废碱中逆流多级高温溶剂萃取溶解的有机物质，产生仅含有剩余量的有机溶质的废碱液残液。 蒸馏塔蒸馏塔以除去残留的有机溶质，得到基本上不含有机物质的经预处理的废碱流。 预处理的废碱适用于牛皮纸工艺或在循环或处理之前进行氧化。 来自萃取器的溶剂萃取物在具有用于吹扫轻馏分的塔顶物流的溶剂再生器，用于净化重馏分的底部流以及用于将溶剂再循环到萃取器中的切断侧流进行再生。 或者，可以将溶剂作为来自现有植物工艺流的切片，一旦通过多级溶剂提取单元，然后返回到从其获取的植物的处理单元。

    Ceramic slot reactor for ethylene production
    7.
    发明授权
    Ceramic slot reactor for ethylene production 失效
    用于乙烯生产的陶瓷槽式反应器

    公开(公告)号：US06383455B1

    公开(公告)日：2002-05-07

    申请号：US08934117

    申请日：1997-09-19

    申请人： Dennis A. Duncan ,  Joseph M. Gondolfe

    发明人： Dennis A. Duncan ,  Joseph M. Gondolfe

    IPC分类号： F28D700

    CPC分类号： C10G9/20 ,  B01J19/0053 ,  B01J19/02 ,  B01J2219/00155 ,  B01J2219/00157 ,  B01J2219/00159

    摘要： A cracking furnace within the firebox of which is located a ceramic structure presenting opposing wall surfaces which thereby define a slot-like passageway through which hydrocarbons may be fed through the firebox of the furnace. This ceramic structure is capable of service under much greater heat loads and temperatures than are metallic reaction lines as have heretofore been used, allowing for a greater firebox temperature which in turn produces an even more rapid cracking of saturated hydrocarbon into ethylene at millisecond residence times within the firebox limits.

    摘要翻译： 火炉内的裂解炉位于具有相对的壁表面的陶瓷结构中，由此形成槽状通道，通过该通道可以将烃送入炉的燃烧室。 这种陶瓷结构能够在比迄今为止使用的金属反应管线高得多的热负荷和温度下工作，允许更大的火炉温度，这反过来又在几毫秒的停留时间内产生甚至更快速地将饱和烃裂化成乙烯 火箱限制。