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公开(公告)号：US20240300875A1
公开(公告)日：2024-09-12
申请号：US18280687
申请日：2022-03-01
Applicant: BASF SE
Inventor： Hans-Guenter WAGNER , Suman THOTLA , Randolf HUGO , Gerrit WATERS , Michael HUEBNER , Markus NEUDERT , Thomas ROUSSIERE
Abstract: The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (8) and a second distillation unit (10), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether as an intermediate product and diisobutene as a by-product in the etherification unit (3): (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), the alkyl tert-butyl ether and diisobutene being withdrawn as the liquid or vaporous bottom product (7), and vaporizing the bottom product (7) if it is withdrawn as a liquid: (c) reacting the vaporous bottom product (7) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (8): (d) distilling the reaction mixture (9) from the ether cleavage unit (8) in the second distillation unit (10), isobutene being withdrawn as the overhead product (11), the primary alcohol and diisobutene being withdrawn as the bottom product (12) and being recycled to the etherification unit (3); the plant further comprising a byproduct separation unit (15) being fed by a bottom purge stream (13) of the first distillation unit (5) and/or by a part of the bottom product of the second distillation unit (10), wherein a diisobutene product stream rich in diisobutene is separated from this feed stream (13, 14).
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公开(公告)号：US20240287396A1
公开(公告)日：2024-08-29
申请号：US18653431
申请日：2024-05-02
Inventor： Matthew J. VINCENT , Keith H. KUECHLER
IPC: C10G69/12 , B01D3/14 , C07C1/24 , C07C2/08 , C07C2/12 , C07C5/03 , C07C7/04 , C07C7/08 , C10L1/08
CPC classification number: C10G69/126 , B01D3/14 , B01D3/143 , C07C1/24 , C07C2/08 , C07C2/12 , C07C5/03 , C07C7/04 , C07C7/08 , C10L1/08 , C07C2529/85 , C07C2529/89 , C10G2300/1092 , C10G2300/301 , C10G2400/08 , C10L2270/04
Abstract: A method for producing an isoolefinic stream may include: oligomerizing an ethylene stream to a C4+ olefin stream in a first olefin oligomerization unit comprising a serial reactor and a lights removal column, wherein the C4+ olefin stream contains no greater than 10 wt % of methane, ethylene, and ethane combined; and wherein the ethylene stream contains at least 50 wt % ethylene, at least 2000 wppm ethane, no greater than 1000 wppm of methane, and no greater than 20 wppm each of carbon monoxide and hydrogen; and oligomerizing the C4+ olefin stream and a propylene/C4+ olefin stream in a second oligomerization unit to produce the isoolefinic stream.
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公开(公告)号：US12071387B2
公开(公告)日：2024-08-27
申请号：US18211391
申请日：2023-06-19
Applicant: TIANJIN UNIVERSITY
Inventor： Minhua Zhang , Hao Gong , He Dong , Feng Shi , Fang Meng , Yingzhe Yu , Haoxi Jiang
CPC classification number: C07C1/24 , C07C7/04 , C09K5/042 , C07C7/12 , C09K2205/12
Abstract: The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.
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公开(公告)号：US12012562B2
公开(公告)日：2024-06-18
申请号：US17820159
申请日：2022-08-16
Inventor： Matthew J. Vincent , Keith H. Kuechler
IPC: C10G69/12 , B01D3/14 , C07C1/24 , C07C2/08 , C07C2/12 , C07C5/03 , C07C7/04 , C07C7/08 , C10L1/08
CPC classification number: C10G69/126 , B01D3/14 , B01D3/143 , C07C1/24 , C07C2/08 , C07C2/12 , C07C5/03 , C07C7/04 , C07C7/08 , C10L1/08 , C07C2529/85 , C07C2529/89 , C10G2300/1092 , C10G2300/301 , C10G2400/08 , C10L2270/04
Abstract: A nonlimiting example method for producing a diesel boiling range composition comprises: oligomerizing an ethylene stream to a C4+ olefin stream in a first olefin oligomerization unit, wherein the C4+ olefin stream contains no greater than 10 wt % of methane, ethylene, and ethane combined in a first oligomerization; and wherein the ethylene stream contains at least 50 wt % ethylene, at least 2000 wppm ethane, no greater than 1000 wppm of methane, and no greater than 20 wppm each of carbon monoxide and hydrogen; oligomerizing the C4+ olefin stream and a propylene/C4+ olefin stream in a second oligomerization unit to produce an isoolefinic stream; wherein at least a portion of the isoolefinic stream is used to create the diesel boiling range composition.
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公开(公告)号：US12006285B2
公开(公告)日：2024-06-11
申请号：US18116336
申请日：2023-03-02
Applicant: OMV Downstream GmbH , BASF SE
Inventor： Suman Thotla , Pawel Tadeusz Czajka , Stefan Manfred Iselborn , Kai-Uwe Wemhöner , Jürgen Popp
CPC classification number: C07C5/2556 , B01D3/007 , B01D3/143 , B01J21/04 , B01J23/42 , B01J23/44 , C07C7/005 , C07C7/04 , C07C2521/04 , C07C2523/42 , C07C2523/44
Abstract: A process for the purification of isobutene from a C4 stream with at least 1-butene, 2-butene, isobutane and isobutene includes isomerizing 1-butene from a stream of material which is concentrated in isobutane and isobutene obtained from the C4 stream into 2-butene, using a catalyst in an isomerization reactor; supplying a product stream from the isomerization reactor to a rectification column; and providing a stream of material which is concentrated in isobutene. A processing facility is utilized for the purification of isobutene from the C4 stream.
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Patent Agency Ranking
公开(公告)号：US11952332B2
公开(公告)日：2024-04-09
申请号：US17966343
申请日：2022-10-14
Applicant: Virent, Inc.
Inventor： Paul G. Blommel , Matthew Van Straten , Brice Dally
CPC classification number: C07C4/18 , B01D3/143 , C07C1/22 , C07C5/11 , C07C7/005 , C07C7/04 , C07C2523/14 , C07C2523/28 , C07C2523/30 , C07C2523/44 , C07C2529/46
Abstract: Processes, catalysts, and reactor systems for reforming heavy aromatic compounds (C11+) into C6-8 aromatic compounds are disclosed. Also disclosed are processes, catalysts, and reactor systems for producing aromatic compounds and liquid fuels from oxygenated hydrocarbons, such as carbohydrates, sugars, sugar alcohols, sugar degradation products, and the like.
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7.发明公开公开(公告)号：US20230382828A1
公开(公告)日：2023-11-30
申请号：US17882045
申请日：2022-08-05
Applicant: Qingdao University of Science and Technology
Inventor： Peizhe CUI , Xin LI , Yinglong WANG , Zhaoyou ZHU , Kaiguang WANG , Jianguang QI , Limei ZHONG , Zhonghui ZHENG , Wenhui XU , Jianbo JIA , Deping DU
IPC: C07C7/04
Abstract: The present disclosure belongs to the technical field of chemical separation and purification, and in particular relates to a purification method and device for continuous distillation and separation of an ibuprofen intermediate raw material. The purification method comprises the following steps: carrying out a primary distillation on synthetic liquid to obtain a primary material and recovered 4-methyl-1-pentene, then carrying out a second-stage distillation on the primary material to obtain a second-stage material and a recovered crude toluene product; and carrying out a third-stage distillation on the second-stage material to obtain isobutyl benzene and a recovered crude n-butylbenzene product. Embodiment results show that the purification method provided by the present disclosure is high in product recovery rate and high in product purity, the purity of isobutyl benzene is up to 99.99 wt %, the recovery rate is up to 99.9 wt %, the impurity content is not higher than 50 ppm.
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公开(公告)号：US11820740B1
公开(公告)日：2023-11-21
申请号：US17821375
申请日：2022-08-22
Applicant: Chevron Phillips Chemical Company LP
Inventor： Wei Qi , Enrique Mancillas , Jeffery C Gee , Sean K. McLaughlin , Jared Fern , Steven Bischof , Paul Hobson
Abstract: Processes and reaction systems for olefin metathesis by reactive distillation, utilizing liquid phase metathesis of reactant olefins in the presence of a homogeneous metathesis catalyst system, where the light metathesis product is produced and leaves the liquid phase as vapor phase and the heavy metathesis product is produced in liquid phase. Separation can be performed on the light metathesis product and a distinct other separation can be performed on the heavy metathesis product.
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9.发明授权公开(公告)号：US11779914B2
公开(公告)日：2023-10-10
申请号：US17477768
申请日：2021-09-17
Inventor： Ananth Kishore Kumar Sontyana , Nikita Sharma , Shivanand Mukund Pai , Bharat Lakshman Newalkar , Kamal Kishore Pant
IPC: B01J37/02 , B01J37/08 , B01J37/04 , B01J37/00 , B01J21/04 , B01J23/755 , B01J37/16 , B01J8/02 , C07C2/84 , C07C7/04 , C07C5/367 , B01J29/14
CPC classification number: B01J37/0213 , B01J8/0242 , B01J21/04 , B01J23/755 , B01J29/146 , B01J37/0009 , B01J37/04 , B01J37/082 , B01J37/16 , C07C2/84 , C07C5/367 , C07C7/04 , B01J2229/20 , C07C2521/04 , C07C2523/755
Abstract: An aspect of the present disclosure relates to a process for preparing a composite hydroalkylation catalyst including: (a) effecting impregnation of a hydrogenation metal on an inorganic oxide to form a metal impregnated inorganic oxide; (b) effecting calcination of the metal impregnated inorganic oxide to obtain a calcined metal impregnated inorganic oxide; (c) preparing a composite mixture comprising a molecular sieve, the calcined metal impregnated inorganic oxide and a binder; (d) preparing an extruded catalyst; and (e) effecting calcination of the extruded catalyst to obtain the composite hydroalkylation catalyst. The composite hydroalkylation catalyst prepared using this process affords dramatic improvement in conversion of mononuclear aromatic hydrocarbon and the yield of the hydroalkyled mononuclear aromatic hydrocarbon (e.g. CHB).
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公开(公告)号：US11760705B2
公开(公告)日：2023-09-19
申请号：US16991523
申请日：2020-08-12
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Paul Podsiadlo , Jeffrey L. Andrews , Michel Molinier
CPC classification number: C07C6/126 , C07C5/2732 , C07C7/005 , C07C7/04
Abstract: A transalkylation process co-feeds benzene at a relatively high proportion with C9+ aromatics in a feed stream to a transalkylation reactor. At lower proportions (≤5 wt %) of benzene, ring loss is greater for benzene than toluene and ring loss is increased by increasing the proportion of benzene in the feed stream. When the benzene is co-fed in a proportion sufficiently greater than 5 weight percent of the feed stream, ring loss is unexpectedly reduced.
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