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    PROCESS FOR PRODUCING ISOCYANATES
    4.
    发明公开
    PROCESS FOR PRODUCING ISOCYANATES 审中-公开

    公开(公告)号：US20230312462A1

    公开(公告)日：2023-10-05

    申请号：US18023747

    申请日：2021-08-23

    Applicant: BASF SE

    Inventor： Jan Pablo JOSCH ,  Matthias HINRICHS ,  Jens FERBITZ ,  Kai THIELE ,  Torsten MATTKE ,  Stefan MAIXNER

    IPC: C07C263/10

    CPC classification number: C07C263/10

    Abstract: The invention relates to a process for producing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, comprising: (a) mixing an amine comprising feed stream, a phosgene comprising feed stream and optionally an inert solvent; (b) reacting the amine with phosgene in a first reaction section to obtain an intermediate reaction mixture comprising isocyanate, carbamoyl chlorides, amine hydrochlorides and unreacted phosgene; (c) cleaving the carbamoyl chlorides and remove phosgene from the intermediate reaction mixture in a second reaction section to obtain an isocyanate comprising crude product, (d) optionally working-up the crude product; wherein reacting (b) is carried out such that the intermediate reaction mixture comprises 1.7 to 5 mol-% solid amine hydrochlorides based on the molar amount of amine fed into the process.

    PROCESS AND REACTOR FOR PRODUCING PHOSGENE
    5.
    发明申请
    PROCESS AND REACTOR FOR PRODUCING PHOSGENE 有权

    公开(公告)号：US20230074789A1

    公开(公告)日：2023-03-09

    申请号：US17797736

    申请日：2021-01-26

    Applicant: BASF SE

    Inventor： Torsten MATTKE ,  Gerhard OLBERT ,  Jens FERBITZ ,  Koenraad VANDEWALLE ,  Kai THIELE ,  Peter VAN DEN ABEEL ,  Jim BRANDTS

    IPC: C01B32/80 ,  B01J7/00 ,  B01J12/00 ,  B01J8/00 ,  B01J8/06

    Abstract: The invention relates to a process for producing phosgene by gas phase reaction of carbon monoxide and chlorine in the presence of a catalyst in a reactor that comprises a plurality of contact tubes arranged parallel to one another, which contact tubes are filled with the catalyst and around which at least one fluid heat transfer medium flows, a feed stream of a mixture of a chlorine input stream and a carbon monoxide input stream being conducted into the contact tubes and reacted to form a phosgene-containing product gas mixture, characterised in that the product gas mixture is discharged from the contact tubes at an outlet end of the contact tubes. The method according to the invention is characterised in that the gas phase reaction is carried out in the reactor such that the position of the highest temperature in a contact tube (hot spot) moves along the longitudinal axis of the contact tube at a predetermined rate of migration, the hot spot having a rate of migration in the longitudinal direction of the contact tubes which is in the range of 1 to 50 mm per day. The invention also relates to a reactor for carrying out the process.

    PROCESS FOR PREPARING AT LEAST ONE POLYISOCYANATE
    6.
    发明申请
    PROCESS FOR PREPARING AT LEAST ONE POLYISOCYANATE 有权

    公开(公告)号：US20240368335A1

    公开(公告)日：2024-11-07

    申请号：US18562515

    申请日：2022-05-24

    Applicant: BASF SE

    Inventor： Jens FERBITZ ,  Jan Pablo JOSCH ,  Kai THIELE ,  Torsten MATTKE

    IPC: C08G18/65 ,  C08G18/38

    Abstract: The present invention relates to a process for preparing at least one polyisocyanate R(—NCO)x, the process comprising preparing a mixture R1 comprising at least one polyamine R(—NH2)x, with x=2 or more, in a first reaction zone Z1; passing at least a portion P1 of the mixture R1, P1 comprising R(—NH2)x, into a storing device D1 and storing P1 in D1 for a period of time Δt1; removing, after storing for Δt1, at least a portion P2 of P1, P2 comprising R(—NH2)x, from D1; passing P2 into a reaction zone Z2; and reacting, in Z2, R(—NH2)x comprised in P2 with phosgene, obtaining a mixture R2 comprising the at least one polyisocyanate R(—NCO)x; wherein Δt1 is in the range of from 1 minute to 7 d.

    METHOD OF SEPARATING PHOSGENE AND HYDROGEN CHLORIDE
    7.
    发明公开
    METHOD OF SEPARATING PHOSGENE AND HYDROGEN CHLORIDE 审中-公开

    公开(公告)号：US20240300817A1

    公开(公告)日：2024-09-12

    申请号：US18277415

    申请日：2022-02-10

    Applicant: BASF SE

    Inventor： Torsten MATTKE ,  Kai THIELE ,  Jens FERBITZ ,  Peter VAN DEN ABEEL ,  Hans-Juergen PALLASCH

    IPC: C01B7/07 ,  B01D53/00 ,  C01B32/80 ,  C07C263/20

    CPC classification number: C01B7/0712 ,  B01D53/002 ,  C01B7/0731 ,  C01B32/80 ,  C07C263/20 ,  B01D2256/26 ,  B01D2257/2064

    Abstract: A process of separating phosgene and hydrogen chloride, comprises: conveying a mixed stream containing hydrogen chloride and phosgene into a distillation column; withdrawing from the distillation column a bottom stream containing phosgene; withdrawing a top stream containing hydrogen chloride; compressing at least a portion of the top stream and at least partially condensing the compressed top stream to form a liquid stream, decompressing at least a portion of the liquid stream to form a cooled liquid stream and a cooled gas stream; and recycling the cooled liquid stream to the top of the distillation column as a reflux; the process additionally comprising temporarily introducing an absorbing solvent into the distillation column, in particular during starting-up and/or shutting-down of the process. The process allows for safe operation even when hydrogen chloride production only gradually begins or decreases, without the necessity of storing hydrogen chloride.

    PROCESS AND REACTOR FOR PRODUCING PHOSGENE
    8.
    发明申请
    PROCESS AND REACTOR FOR PRODUCING PHOSGENE 有权

    公开(公告)号：US20220332587A1

    公开(公告)日：2022-10-20

    申请号：US17612237

    申请日：2020-04-20

    Applicant: BASF SE

    Inventor： Gerhard OLBERT ,  Jens FERBITZ ,  Kai THIELE ,  Peter VAN DEN ABEEL ,  Koenraad VANDEWALLE ,  Jim BRANDTS ,  Torsten MATTKE

    IPC: C01B32/80 ,  B01J8/06

    Abstract: The invention relates to a process for producing phosgene by gas-phase reaction of carbon monoxide and chlorine in the presence of a catalyst in a reactor which comprises a plurality of parallel catalyst tubes which are filled with the catalyst and around which at least one fluid heat transfer medium flows, where a feed stream of a mixture of a chlorine input stream and a carbon monoxide input stream is fed into the catalyst tubes and is allowed to react to give a phosgene-comprising product gas mixture, wherein the reaction is carried out at an area load of more than 2.75 kg of phosgene/m2s. The invention also provides a reactor for carrying out the process.

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