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    • 6. 发明授权
    • Process for producing para-xylene
    • 生产对二甲苯的方法
    • US07626065B2
    • 2009-12-01
    • US12196515
    • 2008-08-22
    • John Di-Yi OuHarold W. Helmke, Jr.John R. Porter
    • John Di-Yi OuHarold W. Helmke, Jr.John R. Porter
    • C07C5/27
    • C07C5/2729C07C5/2732C07C7/13C07C15/08
    • A process for producing a PX-rich product comprises (a) separating a feedstock containing C8 hydrocarbons to produce a C8 hydrocarbons rich stream; (b) separating at least a first portion of the C8 hydrocarbons rich stream to produce a first PX-rich stream and a first PX-depleted stream; (c) isomerizing at least a portion of the first PX-depleted stream to produce a first isomerized stream having a higher PX concentration than the first PX-depleted stream; (d) separating a second portion of the C8 hydrocarbons rich stream and/or at least a portion of the first isomerized stream to produce a second PX-rich stream and a second PX-depleted stream; (e) isomerizing at least a portion of the second PX-depleted stream to produce a second isomerized stream having a higher PX concentration than the second PX-depleted stream; (f) recovering at least a portion of at least one of the first and second PX-rich streams as PX-rich product; and (g) supplying at least a portion of at least one of the first isomerized stream, the second isomerized stream, the first PX-rich stream, and the second PX-rich stream to the separating (a).
    • 制备富PX产品的方法包括(a)分离含有C8烃的原料以产生富含C8烃的物流; (b)分离至少第一部分的富碳氢化合物流以产生第一富含PX的物流和第一个PX-贫化的物流; (c)将至少一部分第一PX-贫化物流异构化以产生具有比第一个PX-贫化物流更高的PX浓度的第一异构化物流; (d)分离第二部分的富碳氢化合物流和/或第一异构化物流的至少一部分以产生第二富含PX的物流和第二个PX-贫化的物流; (e)将至少一部分第二PX-贫化物流异构化以产生具有比第二个PX-贫化物流更高的PX浓度的第二异构化物流; (f)回收至少一部分第一和第二富含PX的物流中的一部分作为富含PX的产物; 和(g)将至少一部分第一异构化物流,第二异构化物流,第一富含PX的物流和第二富含PX的物流的至少一部分供应至分离物(a)。