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    PROCESS FOR RECOVERING ISOPRENOL
    7.
    发明公开
    PROCESS FOR RECOVERING ISOPRENOL 审中-公开

    公开(公告)号：US20240158325A1

    公开(公告)日：2024-05-16

    申请号：US18281451

    申请日：2022-03-11

    Applicant: BASF SE

    Inventor： Andreas KELLER ,  Hans HASSE ,  Rupert WAGNER ,  Bernhard BRUNNER ,  Matthias SCHULT ,  Stephan MAURER ,  Heiko HALLMANN ,  Maximilian DYGA

    IPC: C07C29/80 ,  B01D3/14

    CPC classification number: C07C29/80 ,  B01D3/143

    Abstract: A process for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the process comprising subjecting the stream of crude isoprenol or an isoprenol containing fraction thereof to distillation in a low-boiler separation tower operated at a pressure of 2.5 bara or higher to obtain a distillate stream containing aqueous formaldehyde and a bottoms stream containing isoprenol. The process of the invention allows for obtaining isoprenol essentially free of formaldehyde. Further provided is a plant for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the plant comprising a first low-boiler separation tower, a second low-boiler separation tower, and a finishing tower.

    METHOD FOR THE ISOMERIZATION OF A 3-(Z)-UNSATURATED CARBOXYLIC ACID TO THE 3-(E)-ISOMER
    9.
    发明申请
    METHOD FOR THE ISOMERIZATION OF A 3-(Z)-UNSATURATED CARBOXYLIC ACID TO THE 3-(E)-ISOMER 有权

    公开(公告)号：US20210009495A1

    公开(公告)日：2021-01-14

    申请号：US16969680

    申请日：2019-02-13

    Applicant: BASF SE

    Inventor： Mathias SCHELWIES ,  Wolfgang SIEGEL ,  Rocco PACIELLO ,  Andreas KELLER

    IPC: C07C51/353 ,  C07C51/09 ,  C12P7/64

    Abstract: The present invention relates to a method for isomerizing a 3-(Z)-unsaturated carboxylic acid of the formula 1-Z or a salt thereof, wherein R2 is C1-C24-alkyl, C2-C24-alkenyl having 1, 2, 3 or more than 3 C—C double bonds, unsubstituted or substituted C5-C12-cycloalkyl, or unsubstituted or substituted aryl; R1 is hydrogen or has one of the definitions specified for R2; with the proviso that R2 has a higher priority than R1 in accordance with IUPAC; to give a 3-(E)-unsaturated carboxylic acid of the formula I-E or a salt thereof, wherein the isomerization of the compound of the formula 1-Z is effected in the presence of an anhydride of an organic acid and a base or in the presence of a ketene of formula CR11R12C(0), wherein R11 and R12 are as defined in the claims and in the specification and a base. In particular, the present invention relates to a method for preparing compositions with increased content of (3E,7E)-homofarnesylic acid starting from compositions comprising (3Z,7E)- and (3E,7E)-homofarnesylic acid.

    METHOD FOR CARRYING OUT A GAS/FLUID TWO-PHASE HIGH-PRESSURE REACTION
    10.
    发明申请
    METHOD FOR CARRYING OUT A GAS/FLUID TWO-PHASE HIGH-PRESSURE REACTION 有权

    公开(公告)号：US20210354101A1

    公开(公告)日：2021-11-18

    申请号：US17274110

    申请日：2019-09-03

    Applicant: BASF SE

    Inventor： Oliver BEY ,  Peter ZEHNER ,  Andreas KELLER ,  Stephanie RENZ ,  Mathias SCHELWIES ,  Rocco PACIELLO ,  Martin HAUBNER ,  Guenter WEGNER ,  Gerd TEBBEN ,  Gunnar HEYDRICH ,  Georg SEEBER

    IPC: B01J10/00 ,  B01J3/04 ,  B01J3/02 ,  B01J4/00 ,  C07C45/62 ,  B01J31/24

    Abstract: A process for performing a continuous gas/liquid biphasic high-pressure reaction, wherein a gas and a liquid are introduced into a backmixed zone of a reactor and in the backmixed zone the gas is dispersed in the liquid by stirring, injection of gas and/or a liquid jet, a reaction mixture consecutively traverses the backmixed zone and a zone of limited backmixing, and a liquid reaction product is withdrawn at a reaction product outlet of the zone of limited backmixing, wherein the reactor comprises: an interior formed by a cylindrical vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by means of internals into the backmixed zone, the zone of limited backmixing and a cavity, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor and which delimits the zone of limited backmixing from the backmixed zone, backmixing-preventing second internal elements in the form of random packings, structured packings or liquid-permeable trays arranged in the zone of limited backmixing and a third internal element which in the interior extends in the longitudinal direction of the reactor and is open at the bottom, wherein the third internal element forms the cavity in which gas bubbles collect and do not escape upwards, thus preventing the volume of the cavity from being occupied by liquid and reducing the reaction volume. The reaction volume of the reactor used in the process can be reversibly reduced in simple fashion. The invention further relates to a process for adapting the reaction volume of a reactor suitable for performing a gas/liquid biphasic high-pressure reaction having an outlet for a liquid reaction product in which an internal element is arranged so as to form a cavity open at the bottom in which gas bubbles collect and do not escape upwards, thus preventing the volume of the cavity from being occupied by liquid and reducing the reaction volume.

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