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公开(公告)号：US11236028B2
公开(公告)日：2022-02-01
申请号：US16958383
申请日：2019-01-08
发明人： Constantinos P. Bokis , Javier Guzman , Monica D. Lotz , Michael P. Lanci , Catherine M. Dorsi , Scott J. Weigel
IPC分类号： C07C7/00 , B01D3/10 , C07C2/66 , C07C2/74 , C07C5/10 , C07C5/27 , C07C5/367 , C07C7/04 , C07C7/14 , C07C15/14
摘要： Processes are described for separating 3,4′- and 4,4′-dimethylbiphenyl from a mixture comprising at least 3,3′-, 3,4′- and 4,4′-dimethylbiphenyl. In the processes, the mixture is cooled to produce a crystallization product comprising at least of the 4,4′-dimethylbiphenyl from the feed mixture and a first mother liquor product. The first mother liquor product is distilled to produce a bottoms stream enriched in 4,4′-dimethylbiphenyl as compared with the first mother liquor product and an overhead stream deficient in 4,4′-dimethylbiphenyl as compared with the first mother liquor product. The overhead stream is then cooled to produce a second crystallization product comprising at least part of the 3,4′-dimethylbiphenyl from the overhead stream and a second mother liquor product.
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公开(公告)号：US20210122688A1
公开(公告)日：2021-04-29
申请号：US16605387
申请日：2018-04-19
发明人： Catherine M. Dorsi , Todd E. Detjen , Mayank Shekhar , Anthony Go
摘要： Systems and methods are provided for integration of an aromatic formation process for converting non-aromatic hydrocarbon to an aromatic product and subsequent methylating of a portion of the aromatic product to produce a methylated product, with improvements in the aromatic formation process and/or the methylation process based on integrating portions of the secondary processing trains associated with the aromatic formation process and the methylation process. The aromatic formation process and methylation process can be used, for example, for integrated production of specialty aromatics or gasoline blending components.
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公开(公告)号：US20190002367A1
公开(公告)日：2019-01-03
申请号：US15974158
申请日：2018-05-08
摘要： A process for producing naphthalene or methylnaphthalenes from an alkane-containing stream. In an embodiment, the produce includes providing an alkane-containing feed stream to a reactor, and contacting the ethane-containing stream with an aromatization catalyst within the reactor. The aromatization catalyst comprises molecular sieve, and a dehydrogenation component. In addition, the process includes producing a reactor effluent stream from the reactor, and separating a product stream from the reactor effluent stream. The product stream comprises at least one or both of naphthalene and methylnaphthalene.
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公开(公告)号：US20180002252A1
公开(公告)日：2018-01-04
申请号：US15600494
申请日：2017-05-19
CPC分类号： C07C5/13 , B01D15/1828 , B01D15/185 , C07B63/04 , C07C5/2708 , C07C5/277 , C07C7/005 , C07C7/11 , C07C7/12 , C07C7/13 , C07C15/08 , C07C2601/16
摘要： Disclosed is a process for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce two extract streams—one rich in paraxylene and a paraxylene-rich extract stream that is lean in ethylbenzene and an ethylbenzene-rich extract stream that is lean in paraxylene- and a paraxylene-depleted raffinate stream. A significant amount of the ethylbenzene is removed in the ethylbenzene-rich extract stream (at least enough to limit buildup in the isomerization loop), so the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy and capital intensive hydrogen recycle loop.
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公开(公告)号：US11691933B2
公开(公告)日：2023-07-04
申请号：US17431846
申请日：2020-03-18
发明人： Seth M. Washburn , Hsu Chiang , Catherine M. Dorsi , Tan-Jen Chen
CPC分类号： C07C2/865 , B01J8/02 , B01J29/7038 , C07C2/864 , C07C2529/70
摘要： This disclosure provides an improved process for converting benzene/toluene via methylation with methanol/dimethyl ether for producing, e.g., p-xylene, comprising separating and recycling dimethyl ether from the methylation reaction product mixture effluent to the methylation reactor. High selectivity toward p-xylene, among others, can be achieved.
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公开(公告)号：US11377402B2
公开(公告)日：2022-07-05
申请号：US16605387
申请日：2018-04-19
发明人： Catherine M. Dorsi , Todd E. Detjen , Mayank Shekhar , Anthony Go
IPC分类号： C07C7/08 , C07C2/86 , C07C2/76 , C07C5/27 , C07C29/48 , C07C15/04 , C07C15/073 , C07C15/08 , C07C31/04
摘要： Systems and methods are provided for integration of an aromatic formation process for converting non-aromatic hydrocarbon to an aromatic product and subsequent methylating of a portion of the aromatic product to produce a methylated product, with improvements in the aromatic formation process and/or the methylation process based on integrating portions of the secondary processing trains associated with the aromatic formation process and the methylation process. The aromatic formation process and methylation process can be used, for example, for integrated production of specialty aromatics or gasoline blending components.
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公开(公告)号：US20220153659A1
公开(公告)日：2022-05-19
申请号：US17431846
申请日：2020-03-18
发明人： Seth M. Washburn , Hsu Chiang , Catherine M. Dorsi , Tan-Jen Chen
摘要： This disclosure provides an improved process for converting benzene/toluene via methylation with methanol/dimethyl ether for producing, e.g., p-xylene, comprising separating and recycling dimethyl ether from the methylation reaction product mixture effluent to the methylation reactor. High selectivity toward p-xylene, among others, can be achieved.
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公开(公告)号：US20210053890A1
公开(公告)日：2021-02-25
申请号：US16958383
申请日：2019-01-08
发明人： Constantinos P. Bokis , Javier Gazman , Monica D. Lotz , Michael P. Lanci , Catherine M. Dorsi , Scott J. WEigel
IPC分类号： C07C7/00 , C07C5/367 , C07C5/27 , C07C2/66 , C07C5/10 , C07C2/74 , C07C15/14 , C07C7/04 , C07C7/14 , B01D3/10
摘要： Processes are described for separating 3,4′- and 4,4′-dimethylbiphenyl from a mixture comprising at least 3,3′-, 3,4′- and 4,4′-dimethylbiphenyl. In the processes, the mixture is cooled to produce a crystallization product comprising at least of the 4,4′-dimethylbiphenyl from the feed mixture and a first mother liquor product. The first mother liquor product is distilled to produce a bottoms stream enriched in 4,4′-dimethylbiphenyl as compared with the first mother liquor product and an overhead stream deficient in 4,4′-dimethylbiphenyl as compared with the first mother liquor product. The overhead stream is then cooled to produce a second crystallization product comprising at least part of the 3,4′-dimethylbiphenyl from the overhead stream and a second mother liquor product.
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公开(公告)号：US20190161420A1
公开(公告)日：2019-05-30
申请号：US16184248
申请日：2018-11-08
摘要： Methods and related systems are disclosed for condensing a minor portion of an effluent stream from an alkylation reactor by contacting the effluent stream with a first liquid hydrocarbon quench stream and a second liquid hydrocarbon quench stream. The effluent stream includes catalyst fines from the reactor, and at least a portion of the catalyst fines are carried with the condensed minor portion of the effluent stream.
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公开(公告)号：US10604458B2
公开(公告)日：2020-03-31
申请号：US16184248
申请日：2018-11-08
IPC分类号： C07C2/00 , C07C2/86 , B01D3/14 , B01D5/00 , B01D53/14 , C07C7/00 , B01D53/00 , C07C7/09 , C07C7/04
摘要： Methods and related systems are disclosed for condensing a minor portion of an effluent stream from an alkylation reactor by contacting the effluent stream with a first liquid hydrocarbon quench stream and a second liquid hydrocarbon quench stream. The effluent stream includes catalyst fines from the reactor, and at least a portion of the catalyst fines are carried with the condensed minor portion of the effluent stream.
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