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公开(公告)号：US11377399B2
公开(公告)日：2022-07-05
申请号：US16759866
申请日：2018-11-15
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michel Molinier , Hari Nair , Scott J. Weigel , Michael Salciccioli , Doron Levin
Abstract: A process and related system for producing para-xylene (PX). In an embodiment, the process includes (a) separating a feed stream comprising C6+ aromatic hydrocarbons into a toluene containing stream and a C8+ hydrocarbon containing stream and (b) contacting at least part of the toluene containing stream with a methylating agent in a methylation unit to convert toluene to xylenes and produce a methylated effluent stream. In addition, the process includes (c) recovering PX from the methylated effluent stream in (b) to produce a PX depleted stream and (d) transalkylating the PX depleted stream to produce a transalkylation effluent stream. The transalkylation effluent stream includes a higher concentration of toluene than the PX depleted stream. Further, the process includes (e) converting at least some ethylbenzene (EB) within the C8+ hydrocarbon containing stream into toluene and (f) flowing the toluene converted in (e) to the contacting in (b).
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公开(公告)号：US20210017102A1
公开(公告)日：2021-01-21
申请号：US16903009
申请日：2020-06-16
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Hari Nair , Meha Rungta , Michel Molinier , Doron Levin , Scott J. Weigel , Michael Salciccioli , John F. Brody
Abstract: Alkyl-demethylation of C2+-hydrocarbyl substituted aromatic hydrocarbons can be utilized to treat one or more of a heavy naphtha reformate stream, a hydrotreated SCN stream, a C8 aromatic hydrocarbon isomerization feed stream, a C9+ aromatic hydrocarbon transalkylation feed stream, and similar hydrocarbon streams to produce additional quantity of xylene products.
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公开(公告)号：US10647633B2
公开(公告)日：2020-05-12
申请号：US16075727
申请日：2017-01-27
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Nikolaos Soultanidis , Todd E. Detjen , Scott J. Weigel
IPC: C07C2/86 , B01J29/42 , B01J29/46 , B01J29/40 , B01J37/28 , C07C15/067 , B01J29/44 , B01J29/80 , B01J37/00 , B01J35/00
Abstract: A fluidized bed process for producing para-xylene via toluene and/or benzene methylation with methanol using a dual function catalyst system. A first catalyst accomplishes the toluene and/or benzene methylation and a second catalyst converts the by-products of the methylation reaction or unconverted methylating agent, improves the yields of the desired products, or a combination thereof. The inclusion of the second catalyst can suppress the C1-C5 non-aromatic fraction by over 50% and significantly enhance the formation of aromatics.
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公开(公告)号：US20240101435A1
公开(公告)日：2024-03-28
申请号：US18264271
申请日：2022-03-02
Applicant: Exxonmobil Chemical Patents Inc.
Inventor： Sina Sartipi , Marc H. Anthonis , Aaron W. Peters , Scott J. Weigel
CPC classification number: C01B39/48 , B01J29/7038 , B01J35/615 , B01J35/617 , B01J35/633 , C07C2/66 , C01P2002/72 , C01P2002/86 , C01P2004/03 , C01P2006/12 , C01P2006/14
Abstract: Disclosed is a method of synthesizing a molecular sieve of MWW framework type, and molecular sieves so synthesized. The method comprises preparing a synthesis mixture for forming a molecular sieve of MWW framework type, said synthesis mixture comprising water, a silicon source, a source of a trivalent element X, a structure directing agent R, a source of alkali or alkaline earth metal cation M, and a source of poly(diallyldimethyl ammonium) cation (PDDA).
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公开(公告)号：US11433386B2
公开(公告)日：2022-09-06
申请号：US16742566
申请日：2020-01-14
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Mayank Shekhar , Paul Podsiadlo , Michel Molinier , Scott J. Weigel , Travis D. Sparks , Jocelyn A. Gilcrest , Joseph E. Gatt
IPC: B01J38/12 , B01J38/10 , B01J29/40 , B01J29/72 , B01J6/00 , C07C5/22 , C07C6/06 , B01J37/00 , B01J37/20 , B01J37/02 , C07C15/08
Abstract: Methods are provided for activation of catalysts comprising low amounts of a hydrogenation metal, such as low amounts of a Group 8-10 noble metal. The amount of hydrogenation metal on the catalyst can correspond to 0.5 wt % or less (with respect to the weight of the catalyst), or 0.1 wt % or less, or 0.05 wt % or less. Prior to loading a catalyst into a reactor, the corresponding catalyst precursor can be first activated in a hydrogen-containing atmosphere containing 1.0 vppm of CO or less. The thus first-activated catalyst can be transferred to a reactor with optional exposure to oxygen during the transfer, where it can be further activated using a hydrogen-containing atmosphere containing 3.0 vppm of CO or higher, to yield a twice-activated catalyst with high performance. The catalyst can be advantageously a transalkylation catalyst or an isomerization catalyst useful for converting aromatic hydrocarbons.
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Patent Agency Ranking
公开(公告)号：US20210032182A1
公开(公告)日：2021-02-04
申请号：US16759866
申请日：2018-11-15
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michel Molinier , Hari Nair , Scott J. Weigel , Michael Salciccioli , Doron Levin
Abstract: A process and related system for producing para-xylene (PX). In an embodiment, the process includes (a) separating a feed stream comprising C6+ aromatic hydrocarbons into a toluene containing stream and a C8+ hydrocarbon containing stream and (b) contacting at least part of the toluene containing stream with a methylating agent in a methylation unit to convert toluene to xylenes and produce a methylated effluent stream. In addition, the process includes (c) recovering PX from the methylated effluent stream in (b) to produce a PX depleted stream and (d) transalkylating the PX depleted stream to produce a transalkylation effluent stream. The transalkylation effluent stream includes a higher concentration of toluene than the PX depleted stream. Further, the process includes (e) converting at least some ethylbenzene (EB) within the C8+ hydrocarbon containing stream into toluene and (f) flowing the toluene converted in (e) to the contacting in (b).
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公开(公告)号：US20200179913A1
公开(公告)日：2020-06-11
申请号：US16479179
申请日：2018-02-07
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Matthew S. Ide , Doron Levin , Wenyih F. Lai , Ivy D. Johnson , Scott J. Weigel , Brett T. Loveless
Abstract: Catalyst composition which comprises a first zeolite having a BEA* framework type and a second zeolite having a MOR framework type and a mesopore surface area of greater than 30 m2/g is disclosed. These catalyst compositions are used to remove catalyst poisons from untreated feed streams having one or more impurities which cause deactivation of the downstream catalysts employed in hydrocarbon conversion processes, such as those that produce mono-alkylated aromatic compounds.
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公开(公告)号：US09975820B2
公开(公告)日：2018-05-22
申请号：US15722961
申请日：2017-10-02
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Brian M. Weiss , Darryl D. Lacy , Scott J. Weigel
CPC classification number: C07C5/2737 , B01J29/7046 , B01J35/1014 , C07C4/18 , C07C2529/40 , C07C2529/70 , C07C15/08 , C07C15/04
Abstract: A process for the isomerization of a para-xylene depleted, meta-xylene rich stream under at least partially liquid phase conditions using ZSM-23 with an external surface area of at least 75 m2/g (indicating a small crystallite size), and a SiO2/Al2O3 ratio between 15 and 75 that produces a higher than equilibrium amount of para-xylene, i.e., more than about 24 wt % of para-xylene, based on the total amount of xylenes.
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公开(公告)号：US20170166498A1
公开(公告)日：2017-06-15
申请号：US15296878
申请日：2016-10-18
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Brian M. Weiss , Darryl D. Lacy , Scott J. Weigel
CPC classification number: C07C5/2737 , B01J29/7046 , B01J35/1014 , C07C4/18 , C07C2529/40 , C07C2529/70 , C07C15/08 , C07C15/04
Abstract: A process for the isomerization of a para-xylene depleted, meta-xylene rich stream under at least partially liquid phase conditions using ZSM-23 with an external surface area of at least 75 m2/g (indicating a small crystallite size), and a SiO2/Al2O3 ratio between 15 and 75 that produces a higher than equilibrium amount of para-xylene, i.e., more than about 24 wt % of para-xylene, based on the total amount of xylenes.
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公开(公告)号：US20140378697A1
公开(公告)日：2014-12-25
申请号：US14314557
申请日：2014-06-25
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Emiel de Smit , Neeraj Sangar , Michael Salciccioli , Jihad M. Dakka , Lorenzo C. DeCaul , Terry E. Helton , Scott J. Weigel
IPC: C07C2/74 , C07C67/08 , C07C5/32 , C07C51/265
CPC classification number: C07C2/74 , B01J29/088 , B01J29/106 , B01J29/12 , B01J29/126 , B01J29/146 , B01J29/185 , B01J29/22 , B01J29/24 , B01J29/7057 , B01J29/7084 , B01J29/7415 , B01J29/7469 , B01J29/7615 , B01J29/7669 , B01J35/023 , B01J35/026 , B01J2029/081 , B01J2229/186 , B01J2229/42 , C07C5/367 , C07C51/265 , C07C67/08 , C07C2521/12 , C07C2529/08 , C07C2529/12 , C07C2529/22 , C07C2529/74 , C07C2529/80 , Y02P20/52 , C07C63/331 , C07C69/76 , C07C13/28 , C07C15/14
Abstract: This invention relates to process for producing biphenyl esters, the process comprising: (a) contacting a feed comprising toluene, xylene or mixtures thereof with hydrogen in the presence of a hydroalkylation catalyst to produce a hydroalkylation reaction product comprising (methylcyclohexyl)toluene, wherein the hydroalkylation catalyst comprises: 1) binder present at 40 wt % or less (based upon weight of final catalyst composition), 2) a hydrogenation component present at 0.2 wt % or less (based upon weight of final catalyst composition), and 3) an acidic component comprising a molecular sieve having a twelve membered (or larger) ring pore opening, channel or pocket and a largest pore dimension of 6.0 angstroms or more present at 60 wt % or more, (based upon weight of final catalyst composition); (b) dehydrogenating the hydroalkylation reaction product using a dehydrogenation catalyst to produce a dehydrogenation reaction product comprising a mixture of methyl-substituted biphenyl compounds; (c) contacting at the dehydrogenation reaction product with an oxidizing gas to convert the methyl-substituted biphenyl compounds to biphenyl carboxylic acids; and (d) reacting the biphenyl carboxylic acids with one or more C1 to C14 alcohols to produce biphenyl esters.
Abstract translation: 本发明涉及生产联苯酯的方法，该方法包括：（a）在加氢烷基化催化剂存在下使包含甲苯，二甲苯或其混合物的进料与氢气接触以产生包含（甲基环己基）甲苯的加氢烷基化反应产物，其中 加氢烷基化催化剂包括：1）以40重量％或更少（基于最终催化剂组合物的重量）存在的粘合剂，2）以0.2重量％或更少（基于最终催化剂组合物的重量）存在的氢化组分，和3） 酸性组分包含具有十二元（或更大）环孔开口，通道或口袋和最大孔尺寸为6.0埃或更大的分子筛，分子筛为60重量％或更多（基于最终催化剂组合物的重量）; （b）使用脱氢催化剂使加氢烷基化反应产物脱氢以产生包含甲基取代的联苯化合物的混合物的脱氢反应产物; （c）在脱氢反应产物与氧化气体接触以将甲基取代的联苯化合物转化为联苯羧酸; 和（d）使联苯羧酸与一种或多种C1至C14醇反应以制备联苯酯。
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