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    PROCESS FOR OBTAINING ISOBUTENE FROM A C4-HYDROCARBON MIXTURE
    2.
    发明公开
    PROCESS FOR OBTAINING ISOBUTENE FROM A C4-HYDROCARBON MIXTURE 审中-公开

    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

    IPC: C07C11/09 ,  C07C7/00 ,  C07C7/04 ,  C07C7/148 ,  C07C41/06 ,  C07C41/42

    CPC classification number: C07C11/09 ,  C07C7/005 ,  C07C7/04 ,  C07C7/14891 ,  C07C41/06 ,  C07C41/42

    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mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), the alkyl tert-butyl ether and diisobutene being withdrawn as the liquid or vaporous bottom product (7), and vaporizing the bottom product (7) if it is withdrawn as a liquid: (c) reacting the vaporous bottom product (7) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction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the reaction mixture (9) from the ether cleavage unit (8) in the second distillation unit (10), isobutene being withdrawn as the overhead product (11), the primary alcohol and diisobutene being withdrawn as the bottom product (12) and being recycled to the etherification unit (3); the plant further comprising a byproduct separation unit (15) being fed by a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).

    METHOD OF PRODUCING OLIGOMER
    6.
    发明公开
    METHOD OF PRODUCING OLIGOMER 审中-公开

    公开(公告)号：US20230183148A1

    公开(公告)日：2023-06-15

    申请号：US17777962

    申请日：2021-09-06

    Applicant: LG CHEM, LTD.

    Inventor： Kyung Seog YOUK ,  Min Ho SUN ,  Jong Hun SONG ,  Hong Min LEE ,  Moon Sub HWANG ,  Jeong Seok LEE

    IPC: C07C2/06 ,  C07C7/00 ,  C07C7/148 ,  C07C7/08

    CPC classification number: C07C2/06 ,  C07C7/005 ,  C07C7/14883 ,  C07C7/08

    Abstract: Provided is a method of producing an oligomer, the method including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to produce a reaction product; supplying a discharge stream of the reactor to a separation device, and supplying an upper discharge stream of the separation device including an unreacted monomer to the reactor and supplying a lower discharge stream of the separation device to a settling tank; settling a polymer in the settling tank and removing the polymer, and supplying the lower discharge stream of the separation device from which the polymer is removed to a high-boiling point separation column; removing a high-boiling point material from a lower discharge stream of the high-boiling point separation column and supplying an upper discharge stream of the high-boiling point separation column including an oligomer to a solvent separation column; and separating a solvent and the oligomer in the solvent separation column.

    GREEN METHODS OF MAKING PRODUCT FROM HYDROGEN ENRICHED SYNTHESIS GAS
    7.
    发明申请
    GREEN METHODS OF MAKING PRODUCT FROM HYDROGEN ENRICHED SYNTHESIS GAS 有权

    公开(公告)号：US20230140260A1

    公开(公告)日：2023-05-04

    申请号：US18050910

    申请日：2022-10-28

    Applicant: Synata Bio, Inc.

    Inventor： Jianxin Du

    IPC: C12P7/06 ,  C01B3/48 ,  C07C7/148 ,  C25B1/042 ,  C07C31/08 ,  C12P7/54

    Abstract: “Green” methods of preparing oxygenated products, animal feed, and fertilizer are disclosed. Desired oxygenated products include, but are not limited to, ethanol, acetic acid, butyrate, butanol, propionate, propanol, or any combination thereof. The methods use synthesis gas (syngas), which can be produced from processing of coal, natural gas, and/or biomass. The syngas contains some combination of hydrogen, carbon monoxide, and/or carbon dioxide. The method entails blending the syngas with purge (tail) gases from industrial processes and/or with hydrogen gas, e.g., produced from renewable sources. The resulting mixture is a H2-enriched syngas that is fermented by microorganisms that are well suited to ferment hydrogen-rich gases. Byproducts from the method can also be recovered. The disclosure also provides methods of preparing material fertilizer and animal feed, respectively. By repurposing purge gases so they are not emitted into the environment and/or using hydrogen from renewable sources, the disclosed methods are environmentally-friendly.

    Process and plant for producing alpha olefins
    8.
    发明授权
    Process and plant for producing alpha olefins 有权

    公开(公告)号：US11377404B2

    公开(公告)日：2022-07-05

    申请号：US17425820

    申请日：2020-01-28

    Applicant: LINDE GmbH

    Inventor： Florian Winkler ,  Richard Schneider ,  Florian Mündl

    IPC: C07C7/17 ,  C07C7/148 ,  C07C2/08

    Abstract: A process (100) for the production of linear alpha-olefins is proposed, wherein ethylene is subjected to catalytic oligomerization (1) in a feed mixture to obtain a product mixture containing alpha-olefins with different chain length and side compounds. In a primary fractionation (2), a primary fraction is formed using at least part of the product mixture, and in a secondary fractionation (4), a secondary fraction is formed using at least part of the primary fraction. The primary fractionation (2) and the secondary fractionation (4) are carried out such that the primary fraction and the secondary fraction predominantly contain one of the alpha-olefins and are low in or free of other alpha-olefins, that the primary fraction contains one or more of the side compounds, and that the secondary fraction is depleted relative to the primary fraction in the one or more side compounds. In an intermediate step (3) between the primary fractionation (2) and the secondary fractionation (4), to which at least part of the primary fraction is subjected, the one or more side compounds are at least partly converted to one or more secondary compounds, and the one or more secondary compounds are at least partly separated in the secondary fractionation (4). The intermediate step (3) is carried out in such a way that not more than 0.8% of the alpha-olefin predominantly contained in the primary fraction or the part thereof subjected to the intermediate step is reacted. The intermediate step is carried out in the presence of 30 wt.-ppm to 200 wt.-ppm of water as reaction moderator and using a strongly acidic ion exchange resin.

    Conversion of MEROX process by-products to useful products in an integrated refinery process
    10.
    发明授权
    Conversion of MEROX process by-products to useful products in an integrated refinery process 有权

    公开(公告)号：US11261386B2

    公开(公告)日：2022-03-01

    申请号：US16878939

    申请日：2020-05-20

    Applicant: Saudi Arabian Oil Company

    Inventor： Omer Refa Koseoglu ,  Robert Peter Hodgkins

    IPC: C07C7/10 ,  C10G55/04 ,  C07C7/148 ,  C07C7/00 ,  C07C4/04 ,  C10L3/10 ,  C10L3/12 ,  C10L1/06 ,  C10L1/08

    Abstract: An integrated refinery process for removing mercaptans from a hydrocarbon stream containing mercaptans and converting by-product disulfide oil to useful products. The process includes introducing the hydrocarbon stream containing mercaptans into an extraction vessel containing an alkaline solution and passing the hydrocarbon stream through an extraction section of the extraction vessel which includes one or more liquid-liquid contacting decks for reaction to convert the mercaptans to alkali metal alkanethiolates. Further, the process includes withdrawing a hydrocarbon product stream free of mercaptans from the extraction vessel and recovering spent caustic containing alkali metal alkanethiolates from the extraction vessel. Additionally, the process includes subjecting the spent caustic containing alkali metal alkanethiolates to air oxidation to produce a by-product stream containing disulfide oils (DSO) and sulfides and processing the by-product stream in a steam cracking unit to produce a DSO free product stream.

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