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公开(公告)号：US11827579B2
公开(公告)日：2023-11-28
申请号：US17431745
申请日：2020-03-18
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Seth M. Washburn , Hsu Chiang , Umar Aslam , Wenyih F. Lai , Doron Levin , Tan-Jen Chen
CPC classification number: C07C2/865 , B01J29/70 , B01J29/7088 , C07C2/864 , B01D2255/204 , B01D2255/206 , B01D2255/2061 , B01D2255/2063 , B01D2255/2065 , B01J2523/20 , B01J2523/30 , B01J2523/37 , B01J2523/3706 , B01J2523/3712 , C07C2529/70
Abstract: This disclosure provides improved processes for converting benzene/toluene via methylation with methanol/dimethyl ether for producing, e.g., p-xylene. In an embodiment, a process utilizes a methylation catalyst system comprising a molecular sieve catalyst and an auxiliary catalyst. The auxiliary catalyst comprises a metal element selected from Group 2, Group 3, the lanthanide series, the actinide series, and mixtures and combinations thereof. The auxiliary catalyst may comprise the oxide of the metal element. Deactivation of the molecular sieve catalyst can be reduced with the inclusion of the auxiliary catalyst in the methylation catalyst system.
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2.发明授权公开(公告)号：US11673849B2
公开(公告)日：2023-06-13
申请号：US16271451
申请日：2019-02-08
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Tan-Jen Chen
CPC classification number: C07C15/08 , B01J29/0308 , B01J29/70 , B01J29/7038 , C07C2/864 , C07C15/04 , C07C15/06 , C07C2529/70 , Y02P20/52
Abstract: A process is described for producing paraxylene, in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index≤5, and the alkylation conditions comprise a temperature less than 500° C. The alkylation catalyst may be selectivated to produce a higher than equilibrium amount of paraxylene by using a molar ratio of alkylating agent to aromatic of at least 1:4.
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公开(公告)号：US10696608B2
公开(公告)日：2020-06-30
申请号：US16336034
申请日：2017-09-12
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Todd E. Detjen , Tan-Jen Chen , Brett T. Loveless , Robert G. Tinger
Abstract: In a process for producing paraxylene, a hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index ≤5, and the alkylation conditions comprise a temperature less than 500° C. At least part of the alkylated product is supplied to a paraxylene recovery unit to recover paraxylene and produce a paraxylene-depleted stream, which is then contacted with a xylene isomerization catalyst under conditions effective to isomerize xylenes in the paraxylene-depleted stream and produce an isomerized stream having a higher concentration of paraxylene than the paraxylene-depleted stream. At least part of the isomerized stream is then recycled to the paraxylene recovery unit to recover the paraxylene therein.
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公开(公告)号：US20190218159A1
公开(公告)日：2019-07-18
申请号：US16336034
申请日：2017-09-12
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Todd E. Detjen , Tan-Jen Chen , Brett T. Loveless , Robert G. Tinger
Abstract: In a process for producing paraxylene, a hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index ≤5, and the alkylation conditions comprise a temperature less than 500° C. At least part of the alkylated product is supplied to a paraxylene recovery unit to recover paraxylene and produce a paraxylene-depleted stream, which is then contacted with a xylene isomerization catalyst under conditions effective to isomerize xylenes in the paraxylene-depleted stream and produce an isomerized stream having a higher concentration of paraxylene than the paraxylene-depleted stream. At least part of the isomerized stream is then recycled to the paraxylene recovery unit to recover the paraxylene therein.
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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
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael Salciccioli , Alan A. Galuska , Tan-Jen Chen , Catherine M. Dorsi , Mayank Shekhar
Abstract: 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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Patent Agency Ranking
6.发明申请公开(公告)号：US20180099915A1
公开(公告)日：2018-04-12
申请号：US15702469
申请日：2017-09-12
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Tan-Jen Chen
CPC classification number: C07C15/08 , B01J29/7038 , C07C2/864 , C07C15/04 , C07C15/06 , C07C2529/70 , Y02P20/52
Abstract: A process is described for producing paraxylene, in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index ≤5, and the alkylation conditions comprise a temperature less than 500° C. The alkylation catalyst may be selectivated to produce a higher than equilibrium amount of paraxylene by using a molar ratio of alkylating agent to aromatic of at least 1:4.
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公开(公告)号：US20180050971A1
公开(公告)日：2018-02-22
申请号：US15554211
申请日：2015-12-16
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael Salciccioli , Neeraj Sangar , Tan-Jen Chen , Emiel de Smit , Ali A. Kheir , Aaron B. Pavlish
CPC classification number: C07C6/126 , C07C2/74 , C07C5/11 , C07C5/367 , C07C2521/04 , C07C2529/08 , C07C2529/12 , C07C2529/70 , C07C2529/74 , C07C2601/14 , C07C13/28 , C07C15/14
Abstract: Processes for selectively alkylating and/or dealkylating one ring of cyclohexylbenzyl and/or biphenyl compounds are provided. Such selective alkylation and/or dealkylation takes place through a transalkylation reaction between the cyclohexylbenzyl compound and a substituted or unsubstituted benzene, which replaces the phenyl moiety of the cyclohexylbenzyl compound. The transalkylated cyclohexylbenzyl may be dehydrogenated to give a corresponding biphenyl compound. The same reaction steps can be utilized with respect to biphenyl compounds by first partially hydrogenating one phenyl ring of the biphenyl compound, thereby obtaining a corresponding cyclohexylbenzyl compound, which may undergo the transalkylation and, optionally, subsequent dehydrogenation. Combinations of any two or more of partial hydrogenation, transalkylation, and dehydrogenation enable targeted substitution (or de-substitution) of only one ring of cyclohexylbenzyl and/or biphenyl compounds, thereby providing superior control in designing the synthesis of these compounds.
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公开(公告)号：US09896393B2
公开(公告)日：2018-02-20
申请号：US14723546
申请日：2015-05-28
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael Salciccioli , Tan-Jen Chen , Neeraj Sangar , Ali A. Kheir , Aaron B. Pavlish
CPC classification number: C07C2/74 , C07C5/10 , C07C5/11 , C07C5/367 , C07C6/126 , C07C2523/42 , C07C2523/44 , C07C2529/08 , C07C2529/18 , C07C2529/70 , C07C2529/74 , C07C2601/14 , C07C13/28 , C07C15/14
Abstract: In a process for producing dialkylbiphenyl compounds, a feed comprising substituted cyclohexylbenzene isomers having the formula (I): wherein each of R1 and R2 is an alkyl group and wherein the feed comprises m % by weight of isomers in which R1 is in the 2-position, based on the total weight of substituted cyclohexylbenzene isomers in the feed; is transalkylated with a compound of formula (II): to produce a transalkylation product comprising substituted cyclohexylbenzene isomers having the formula (I) and including n % by weight of isomers in which R1 is in the 2-position, based on the total weight of substituted cyclohexylbenzene isomers in the transalkylation product, wherein n
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公开(公告)号：US09144792B2
公开(公告)日：2015-09-29
申请号：US14498495
申请日：2014-09-26
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Gabor Kiss , Thomas E. Green , Terry E. Helton , Tan-Jen Chen
IPC: C07C45/53 , C07C37/08 , C07C2/66 , B01J29/00 , B01J29/88 , C07C2/74 , C07C407/00 , B01J23/40 , B01J23/75 , B01J23/755 , B01J29/65 , B01J29/70 , B01J29/72 , B01J29/80 , C07C6/12
CPC classification number: B01J29/88 , B01J23/40 , B01J23/75 , B01J23/755 , B01J29/65 , B01J29/66 , B01J29/7038 , B01J29/7088 , B01J29/7276 , B01J29/80 , C07C2/66 , C07C2/74 , C07C6/126 , C07C37/08 , C07C45/53 , C07C407/00 , C07C2529/00 , C07C2529/65 , C07C2529/67 , C07C2529/68 , C07C2529/74 , C07C2529/88 , C07C2601/14 , Y02P20/52 , C07C13/28 , C07C39/04 , C07C49/403 , C07C409/14
Abstract: Disclosed are a catalyst comprising (A) an aluminosilicate molecular sieve comprising a ferrierite phase and (B) a hydrogenation metal component, and a hydroalkylation process using the catalyst. The catalyst and the hydroalkylation process can be used in the production of phenol and/or cyclohexanone from benzene hydroalkylation.
Abstract translation: 公开了一种催化剂，其包含（A）包含镁碱沸石相和（B）氢化金属组分的铝硅酸盐分子筛和使用该催化剂的加氢烷基化方法。 催化剂和加氢烷基化方法可用于从苯加氢烷基化生产苯酚和/或环己酮。
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公开(公告)号：US20150266795A1
公开(公告)日：2015-09-24
申请号：US14435670
申请日：2013-11-18
Applicant: EXXONMOBIL CHEMICAL PATENTS INC.
Inventor： Tan-Jen Chen , Christopher L. Becker , Hari Nair , Francisco M. Benitez , Charles Morris Smith
CPC classification number: C07C5/367 , B01J23/626 , C07C2/74 , C07C37/08 , C07C37/60 , C07C45/294 , C07C45/53 , C07C407/00 , C07C2101/14 , C07C2521/08 , C07C2523/14 , C07C2523/42 , C07C2523/62 , C07C2601/14 , Y02P20/52 , C07C409/14 , C07C49/403 , C07C39/04 , C07C13/28 , C07C15/04
Abstract: Disclosed herein is a process for dehydrogenating a hydrocarbon with a dehydrogenation catalyst comprising a step of activating the catalyst precursor in a H2-containing atmosphere. A particularly advantageous activation process includes heating the catalyst precursor to a temperature in a range from 400° C. to 600° C. The process of the present disclosure is particularly advantageous for dehydrogenating cyclohexane to make benzene.
Abstract translation: 本文公开了一种用脱氢催化剂使烃脱氢的方法，包括在含H2气氛中活化催化剂前体的步骤。 特别有利的活化方法包括将催化剂前体加热至400℃至600℃的温度。本公开的方法对于使环己烷脱氢以制备苯是特别有利的。
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