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公开(公告)号：US09850186B2
公开(公告)日：2017-12-26
申请号：US15375754
申请日：2016-12-12
发明人： Gaurav Agrawal , Michael W. Weber , Michael Salciccioli , John R. Porter , Dana L. Pilliod , Timothy P. Bender
IPC分类号： C07C5/27
CPC分类号： C07C5/2767 , B01D15/1821 , C07C5/2702 , C07C5/2729 , C07C7/11 , C07C15/08
摘要： A process for producing paraxylene is provided. The process includes separating a first mixture of C8 aromatic hydrocarbons in a simulated moving bed apparatus using a desorbent to produce (i) an extract comprising ≧50.0 wt % of the paraxylene in the first mixture; (ii) a desorbent-rich raffinate comprising ≧75 wt % of the desorbent withdrawn, and (iii) an desorbent-lean raffinate comprising ≦25 wt % of the desorbent withdrawn in the desorbent-rich and desorbent-lean raffinates. The desorbent-lean raffinate can then, without an intervening separation step, be passed to a refinery process or a vapor phase isomerization reaction to produce an effluent comprising paraxylene in a greater concentration than the desorbent-lean raffinate. The desorbent-rich raffinate can be passed to a liquid phase isomerization reaction to produce an effluent comprising paraxylene in a greater concentration than the desorbent-rich raffinate.
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公开(公告)号：US20170050898A1
公开(公告)日：2017-02-23
申请号：US15345990
申请日：2016-11-08
CPC分类号： C07C5/2729 , B01D15/185 , B01J19/2445 , B01J2219/24 , C07C5/2737 , C07C5/2767 , C07C5/2775 , C07C15/08
摘要： A process for producing para-xylene (PX) comprises supplying a hydrocarbon feed comprising xylenes and ethylbenzene (EB) to a PX recovery unit, where a PX-rich stream and at least one PX-depleted stream are recovered from the feed. The PX-depleted stream is then separated into an EB-rich stream and an EB-depleted stream in a divided wall column. The EB-depleted stream is then isomerized under at least partial liquid phase conditions to produce a first isomerized stream having a higher PX concentration than the PX-depleted stream, and the EB-rich stream is isomerized under at least partial vapor phase conditions to produce a second isomerized stream having a higher PX concentration than the PX-depleted stream. The first and second isomerized streams are then recycled to the PX recovery unit to recover additional PX and the process is repeated to define a so-called xylene isomerization loop.
摘要翻译： 制备对二甲苯（PX）的方法包括将包含二甲苯和乙苯（EB）的烃进料供应到PX回收单元，其中富含PX的料流和至少一种不含PX的料流从进料中回收。 然后将PX-贫化的物流分离成富EB的流和分离壁塔中的EB-贫化的流。 然后将EB-贫化的物流在至少部分液相条件下异构化，以产生具有比PX贫化物流更高的PX浓度的第一异构化物流，并且在至少部分气相条件下使富含EB的物流异构化以产生 具有比PX贫化物流更高的PX浓度的第二异构化物流。 然后将第一和第二异构化物流再循环到PX回收单元以回收另外的PX，并重复该过程以定义所谓的二甲苯异构化回路。
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公开(公告)号：US20160145174A1
公开(公告)日：2016-05-26
申请号：US14885319
申请日：2015-10-16
CPC分类号： C07C7/12 , B01D15/1807 , B01D15/1828 , B01D15/1835 , B01D15/1842 , C07C15/08
摘要： A simulated moving bed process using dual, parallel rotary valves configured or plumbed to be operated independently in which the step times of the rotary valves are staggered. In embodiments, the second rotary valve is programmed to step about halfway through the step time of the first rotary valve. Staggering the step time of the parallel rotary valves, rather than utilizing simultaneous stepping, results in increased net composite paraxylene concentration of the extract stream, allowing for increased capacity of the simulated moving bed process and/or reduced energy consumption.
摘要翻译： 使用双平行旋转阀的模拟移动床方法，其配置或垂直地独立操作，其中旋转阀的步进时间交错。 在实施例中，第二旋转阀被编程为在第一旋转阀的步进时间的大约一半步进。 平行旋转阀的步进时间，而不是利用同时步进，导致萃取物流的净复合对二甲苯浓度增加，允许增加模拟移动床过程的能力和/或降低的能量消耗。
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公开(公告)号：US20150376087A1
公开(公告)日：2015-12-31
申请号：US14735695
申请日：2015-06-10
发明人： Michel Molinier , Jeffrey L. Andrews , Timothy P. Bender , Robert G. Tinger , Dennis J. Stanley , George J. Wagner
CPC分类号： C07C5/277 , B01J19/24 , B01J19/2445 , B01J19/245 , B01J2219/24 , C07C2/862 , C07C2/864 , C07C4/14 , C07C5/2729 , C07C5/2732 , C07C6/04 , C07C6/06 , C07C6/123 , C07C7/005 , C07C7/04 , C07C7/12 , C07C7/13 , C07C7/14 , C10G35/04 , C07C15/08
摘要： In a process for producing para-xylene, a toluene-containing stream is contacted with a methylating agent under conditions effective to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the methylated effluent stream to produce a para-xylene depleted stream and part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under liquid phase isomerization conditions effective to produce a first isomerized stream, while part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under vapor phase isomerization conditions effective to produce a second isomerized stream. The first and second isomerized streams are then recycled to the para-xylene recovery step.
摘要翻译： 在制备对二甲苯的方法中，含有甲苯的物流在有效将甲苯转化为二甲苯并产生甲基化流出物流的条件下与甲基化剂接触。 从甲基化流出物流中回收对二甲苯以产生对二甲苯贫化物流，并且部分对二甲苯贫化物流在有效产生第一异构化物流的液相异构化条件下与二甲苯异构化催化剂接触，而部分 在有效产生第二异构化流的气相异构化条件下，将对二甲苯贫化物流与二甲苯异构化催化剂接触。 然后将第一和第二异构化物流再循环至对二甲苯回收步骤。
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公开(公告)号：US10450243B2
公开(公告)日：2019-10-22
申请号：US14861707
申请日：2015-09-22
摘要： A process is provided for producing xylene by transalkylation including introducing sulfur into a reactor containing a catalyst system prior to first introduction of hydrocarbon feedstock into the reactor; introducing hydrocarbon feedstock into the reactor upon the concentration of sulfur downstream of the catalyst system meeting a predetermined sulfur breakthrough concentration; continuing sulfur introduction for a period of time after first introducing hydrocarbon feedstock into the reactor; reducing the concentration of sulfur introduced upon ΔT decreasing to or below a predetermined sulfur reduction threshold; and discontinuing sulfur introduction upon ΔT decreasing to or below a predetermined sulfur shutoff threshold.
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公开(公告)号：US09896398B2
公开(公告)日：2018-02-20
申请号：US15262648
申请日：2016-09-12
CPC分类号： C07C7/12 , B01D15/1807 , B01D15/1828 , B01D15/1835 , B01D15/1842 , C07C15/08
摘要： A simulated moving bed process using dual, parallel rotary valves configured or plumbed to be operated independently in which the step times of the rotary valves are staggered. In embodiments, the second rotary valve is programmed to step about halfway through the step time of the first rotary valve. Staggering the step time of the parallel rotary valves, rather than utilizing simultaneous stepping, results in increased net composite paraxylene concentration of the extract stream, allowing for increased capacity of the simulated moving bed process and/or reduced energy consumption.
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公开(公告)号：US20170036973A1
公开(公告)日：2017-02-09
申请号：US15262648
申请日：2016-09-12
CPC分类号： C07C7/12 , B01D15/1807 , B01D15/1828 , B01D15/1835 , B01D15/1842 , C07C15/08
摘要： A simulated moving bed process using dual, parallel rotary valves configured or plumbed to be operated independently in which the step times of the rotary valves are staggered. In embodiments, the second rotary valve is programmed to step about halfway through the step time of the first rotary valve. Staggering the step time of the parallel rotary valves, rather than utilizing simultaneous stepping, results in increased net composite paraxylene concentration of the extract stream, allowing for increased capacity of the simulated moving bed process and/or reduced energy consumption.
摘要翻译： 使用双平行旋转阀的模拟移动床方法，其配置或垂直地独立操作，其中旋转阀的步进时间交错。 在实施例中，第二旋转阀被编程为在第一旋转阀的步进时间的大约一半步进。 平行旋转阀的步进时间，而不是利用同时步进，导致萃取物流的净复合对二甲苯浓度增加，允许增加模拟移动床过程的能力和/或降低的能量消耗。
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公开(公告)号：US20170029348A1
公开(公告)日：2017-02-02
申请号：US15175400
申请日：2016-06-07
发明人： Timothy P. Bender
CPC分类号： C07C7/005 , B01D3/141 , B01D3/143 , B01D3/40 , C07C7/04 , C07C7/08 , C10G7/08 , C10G65/06 , C10G65/08 , C10G67/04
摘要： The present invention relates to an improved extractive distillation process for recovering aromatic hydrocarbons from non-aromatic hydrocarbons in naphtha streams containing heavy hydrocarbon contaminants wherein each contaminant is characterized as having a boiling point in the range of between that of the separated non-aromatic hydrocarbons and the extractive distillation solvent utilized to recover and purify the aromatic hydrocarbons.
摘要翻译： 本发明涉及一种改进的萃取蒸馏方法，用于从含有重烃污染物的石脑油流中的非芳族烃回收芳族烃，其中每个污染物的特征在于沸点在分离的非芳族烃和 萃取蒸馏溶剂用于回收和纯化芳烃。
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公开(公告)号：US09522863B2
公开(公告)日：2016-12-20
申请号：US14580452
申请日：2014-12-23
发明人： Timothy P. Bender
摘要： A process is described for separating paraxylene from a multicomponent fluid mixture of C8 aromatics, and more particularly to a process for separating paraxylene from such a fluid mixture by means of adsorption apparatus, such as moving-bed or simulated moving-bed adsorption apparatus. A process is also described for making paraxylene by making a mixture of C8 aromatics and separating paraxylene from the mixture by means of a simulated moving-bed adsorption apparatus.
摘要翻译： 描述了用于从C8芳族化合物的多组分流体混合物中分离对二甲苯的方法，更具体地涉及通过诸如移动床或模拟移动床吸附装置的吸附装置从这种流体混合物中分离对二甲苯的方法。 还描述了通过模拟移动床吸附装置从混合物中制备C8芳族化合物和分离对二甲苯的混合物来制备对二甲苯的方法。
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公开(公告)号：US09464012B2
公开(公告)日：2016-10-11
申请号：US14885319
申请日：2015-10-16
CPC分类号： C07C7/12 , B01D15/1807 , B01D15/1828 , B01D15/1835 , B01D15/1842 , C07C15/08
摘要： A simulated moving bed process using dual, parallel rotary valves configured or plumbed to be operated independently in which the step times of the rotary valves are staggered. In embodiments, the second rotary valve is programmed to step about halfway through the step time of the first rotary valve. Staggering the step time of the parallel rotary valves, rather than utilizing simultaneous stepping, results in increased net composite paraxylene concentration of the extract stream, allowing for increased capacity of the simulated moving bed process and/or reduced energy consumption.
摘要翻译： 使用双平行旋转阀的模拟移动床方法，其配置或垂直地独立操作，其中旋转阀的步进时间交错。 在实施例中，第二旋转阀被编程为在第一旋转阀的步进时间的大约一半步进。 平行旋转阀的步进时间，而不是利用同时步进，导致萃取物流的净复合对二甲苯浓度增加，允许增加模拟移动床过程的能力和/或降低的能量消耗。
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