Patents by Inventor Todd E. Detjen
Todd E. Detjen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230295063Abstract: A membrane separator comprising a membrane is used to separate various streams in processes for separating aromatic hydrocarbons from non-aromatic hydrocarbons. Such streams can be a lean-solvent stream, a rich-solvent stream, or a hydrocarbon stream comprising both aromatic and non- aromatic hydrocarbons. The membrane separator is advantageously used in combination with an extraction sub-system including a liquid—liquid distillation column and/or an extraction distillation column.Type: ApplicationFiled: July 7, 2021Publication date: September 21, 2023Inventors: Todd E. Detjen, Chong-Jhoo Wang, Robert G. Tinger
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Publication number: 20230257329Abstract: Processes for producing high-octane-number fuel components, particularly those useful for AvGas blends, can be advantageously produced from hydrocarbon feed streams comprising C8+ aromatic hydrocarbons. Such feed streams may be produced by, among others, separation and other optional post-processing of an effluent produced from a steam cracker (e.g., a liquid feed steam cracker cracking liquid feeds such as naphtha and/or other crude fractions, a gas steam cracker cracking gas feeds such as ethane and/or propane), hydrocarbon reforming of a crude fraction or steam cracker effluent fraction, C6-C7 aromatic hydrocarbon methylation, transalkylation between C6-C7 aromatic hydrocarbons and C9+ aromatic hydrocarbons, isomerization of C8 aromatic hydrocarbons, and toluene disproportionation processes.Type: ApplicationFiled: July 6, 2021Publication date: August 17, 2023Inventors: Robert G. Tinger, Theophile E. Foyen, Stephen J. Mokulis, Todd E. Detjen
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Patent number: 11673848Abstract: A process and system for separating paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a simulated moving bed apparatus using a membrane to separate non-aromatics from a desorbent stream. The lower nonaromatics content in the desorbent improves paraxylene product purity, increases paraxylene production at the same desorbent rate, reduces the desorbent rate, and/or reduces energy consumption in the product tower.Type: GrantFiled: January 11, 2021Date of Patent: June 13, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Oluwagbogo Adebayo-Ige, Robert G. Tinger, Todd E. Detjen, Bhupender S. Minhas
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Publication number: 20230089144Abstract: A process and system for separating paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a simulated moving bed apparatus using a membrane to separate non-aromatics from a desorbent stream. The lower nonaromatics content in the desorbent improves paraxylene product purity, increases paraxylene production at the same desorbent rate, reduces the desorbent rate, and/or reduces energy consumption in the product tower.Type: ApplicationFiled: January 11, 2021Publication date: March 23, 2023Inventors: Oluwagbogo Adebayo-Ige, Robert G. Tinger, Todd E. Detjen, Bhupender S. Minhas
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Publication number: 20220289645Abstract: An changeable lead-lag configuration of two isomerization reactors can be used to achieve continuous isomerization operations in an aromatics production complex, even if the isomerization catalyst deactivates over time to require catalyst regeneration and/or replacement. The configuration can be particularly advantageous for two liquid phase isomerization reactors, especially those operated under a high WHSV?5 hour?1 where the isomerization catalyst can deactivate at a high rate.Type: ApplicationFiled: August 11, 2020Publication date: September 15, 2022Inventors: Robert G. Tinger, Hari Nair, Todd E. Detjen, Paul Podsiadlo, Travis D. Sparks
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Publication number: 20220274900Abstract: A liquid phase isomerization process comprising cofeeding molecular hydrogen at a feeding rate ?100 ppm by weight can effectively convert a C8 aromatic hydrocarbon isomerization feed in the presence of an isomerization catalyst with a very low deactivation rate of the catalyst, even at high WHSV ?5 hour?1.Type: ApplicationFiled: August 11, 2020Publication date: September 1, 2022Inventors: Robert G. Tinger, Hari Nair, Todd E. Detjen, Paul Podsiadlo, Travis D. Sparks
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Patent number: 11377402Abstract: 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.Type: GrantFiled: April 19, 2018Date of Patent: July 5, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Catherine M. Dorsi, Todd E. Detjen, Mayank Shekhar, Anthony Go
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Patent number: 11331658Abstract: Processes for activating precious metal-containing catalysts. The processes can decrease the amount of high purity hydrogen required for starting up a catalytic conversion process such as transalkylation of heavy aromatics, without detrimental impact to the metal activity. The processes can include a low temperature treatment step with a high purity first gas, such as hydrogen generated by electrolysis and/or reformer hydrogen diluted with high purity inert gas, and a high temperature treatment step with a low purity second gas such as the reformer hydrogen. Also, the processes can include mixing a hydrogen gas of high or low purity with a high purity inert gas to form a gas mixture with a proportion of hydrogen no less than 2% and a reduced carbon monoxide concentration relative to the low purity hydrogen, and contacting the catalyst with the gas mixture.Type: GrantFiled: March 12, 2020Date of Patent: May 17, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul Podsiadlo, Robert G. Tinger, Todd E. Detjen, Jesus A. Ramos, Jeffrey L. Andrews, Travis D. Sparks
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Publication number: 20210230083Abstract: A process for producing xylene from C9+ aromatic hydrocarbons comprises contacting a first feedstock comprising C9+ aromatic hydrocarbons with a first catalyst in the presence of hydrogen under effective vapor phase dealkylation conditions to dealkylate part of the C9+ aromatic hydrocarbons and produce a first product comprising benzene and unreacted C9+ aromatic hydrocarbons. A second feedstock comprising toluene is contacted with a second catalyst in the presence of hydrogen under effective vapor phase toluene disproportionation conditions to disproportionate at least part of the toluene and produce a second product comprising para-xylene. A third feedstock comprising C9+ aromatic hydrocarbons and benzene and/or toluene is contacted with a third catalyst in the presence of hydrogen under effective liquid phase C9+ transalkylation conditions to transalkylate at least part of the C9+ aromatic hydrocarbons and produce a third product comprising xylenes.Type: ApplicationFiled: February 10, 2017Publication date: July 29, 2021Inventors: Todd E. Detjen, Jeevan S. Abichandani
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Patent number: 11001544Abstract: Co-feeding sulfolane into a transalkylation reactor along with the aromatic hydrocarbon feed(s) can improve benzene purity of the benzene product stream produced from the transalkylation product mixture, especially at the beginning phase of a catalyst cycle.Type: GrantFiled: May 12, 2020Date of Patent: May 11, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jesus A. Ramos, Robert G. Tinger, Paul Podsiadlo, Todd E. Detjen, Kathleen M. Keville
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Publication number: 20210122688Abstract: 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.Type: ApplicationFiled: April 19, 2018Publication date: April 29, 2021Inventors: Catherine M. Dorsi, Todd E. Detjen, Mayank Shekhar, Anthony Go
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Patent number: 10961168Abstract: A process for producing paraxylene by the catalytic alkylation of benzene and/or toluene with methanol, which produces a para-rich mixture of xylene isomers, together with water and some light organic by-products, particularly dimethyl ether and C4? olefins. The off-gas stream, containing the C4? olefins, may be recycled back to the reaction to be co-injected with methanol to reduce the methanol self-decomposition and the reaction of methanol to olefins or to fluidize catalyst particles recovered by a reactor cyclone. By using recycled off-gas rather than water or steam, the deleterious effects of water and/or steam on the catalyst aging and activity rates and the size of downstream equipment necessary to recover olefin by-products may be reduced.Type: GrantFiled: August 2, 2017Date of Patent: March 30, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd E. Detjen, Robert G. Tinger
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Publication number: 20200407291Abstract: Co-feeding sulfolane into a transalkylation reactor along with the aromatic hydrocarbon feed(s) can improve benzene purity of the benzene product stream produced from the transalkylation product mixture, especially at the beginning phase of a catalyst cycle.Type: ApplicationFiled: May 12, 2020Publication date: December 31, 2020Inventors: Jesus A. Ramos, Robert G. Tinger, Paul Podsiadlo, Todd E. Detjen, Kathleen M. Keville
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Patent number: 10800718Abstract: Disclosed herein is a process for producing para-xylene comprising the steps of: (a) contacting a feedstock comprising toluene with a first catalyst under effective vapor phase toluene disproportionation conditions to disproportionate said toluene and produce a first product comprising benzene, unreacted toluene and greater than equilibrium amounts of para-xylene; and (b) contacting a feedstock comprising C9+ aromatic hydrocarbons and benzene with a second catalyst in the presence of 0 wt. % or more of hydrogen having a 0 to 10 hydrogen/hydrocarbon molar ratio under effective C9+ transalkylation conditions to transalkylate said C9+ aromatic hydrocarbons and produce a second product comprising xylenes.Type: GrantFiled: February 10, 2017Date of Patent: October 13, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd E. Detjen, Jeevan S. Abichandani
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Publication number: 20200306744Abstract: Processes for activating precious metal-containing catalysts. The processes can decrease the amount of high purity hydrogen required for starting up a catalytic conversion process such as transalkylation of heavy aromatics, without detrimental impact to the metal activity. The processes can include a low temperature treatment step with a high purity first gas, such as hydrogen generated by electrolysis and/or reformer hydrogen diluted with high purity inert gas, and a high temperature treatment step with a low purity second gas such as the reformer hydrogen. Also, the processes can include mixing a hydrogen gas of high or low purity with a high purity inert gas to form a gas mixture with a proportion of hydrogen no less than 2% and a reduced carbon monoxide concentration relative to the low purity hydrogen, and contacting the catalyst with the gas mixture.Type: ApplicationFiled: March 12, 2020Publication date: October 1, 2020Inventors: Paul Podsiadlo, Robert G. Tinger, Todd E. Detjen, Antonio O. Ramos, Jeffrey L. Andrews, Travis D. Sparks
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Patent number: 10696608Abstract: 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.Type: GrantFiled: September 12, 2017Date of Patent: June 30, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd E. Detjen, Tan-Jen Chen, Brett T. Loveless, Robert G. Tinger
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Patent number: 10661258Abstract: The invention relates to treating a molecular sieve prepared by at least one in situ selectivation sequence wherein graphitic coke is adhered to said molecular sieve, which is useful in a toluene disproportionation process.Type: GrantFiled: April 30, 2014Date of Patent: May 26, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd E. Detjen, Xiaobo Zheng, Robert G. Tinger
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Patent number: 10647633Abstract: 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.Type: GrantFiled: January 27, 2017Date of Patent: May 12, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Nikolaos Soultanidis, Todd E. Detjen, Scott J. Weigel
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Patent number: 10604458Abstract: 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.Type: GrantFiled: November 8, 2018Date of Patent: March 31, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd E. Detjen, John S. Kennedy, Catherine M. Dorsi
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Publication number: 20200017425Abstract: A process for producing paraxylene by the catalytic alkylation of benzene and/or toluene with methanol, which produces a para-rich mixture of xylene isomers, together with water and some light organic by-products, particularly dimethyl ether and C4? olefins. The off-gas stream, containing the C4? olefins, may be recycled back to the reaction to be co-injected with methanol to reduce the methanol self-decomposition and the reaction of methanol to olefins or to fluidize catalyst particles recovered by a reactor cyclone. By using recycled off-gas rather than water or steam, the deleterious effects of water and/or steam on the catalyst aging and activity rates and the size of downstream equipment necessary to recover olefin by-products may be reduced.Type: ApplicationFiled: August 2, 2017Publication date: January 16, 2020Inventors: Todd E Detjen, Robert G. Tinger