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    PROCESS FOR STABILIZING A PHOSPHITE LIGAND AGAINST DEGRADATION
    7.
    发明申请
    PROCESS FOR STABILIZING A PHOSPHITE LIGAND AGAINST DEGRADATION 有权
    抑制磷酸盐配体降解的方法

    公开(公告)号：US20150232403A1

    公开(公告)日：2015-08-20

    申请号：US14429672

    申请日：2013-09-09

    Applicant: DOW TECHNOLOGY INVESTMENTS LLC

    Inventor： Glenn A. Miller ,  Thomas C. Eisenschmid ,  Michael A. Brammer ,  Rick B. Watson

    IPC: C07C45/50

    CPC classification number: C07C45/505 ,  B01J31/185 ,  B01J2231/321 ,  B01J2531/822 ,  C07C45/50 ,  C07F9/65744 ,  Y02P20/582 ,  C07C47/02

    Abstract: A process for stabilizing a phosphite ligand against degradation in a hydroformylation reaction fluid, said process comprising adding an epoxide to the reaction fluid, and further comprising separating one or more phosphorus acidic compounds from the reaction fluid by treating the reaction fluid with an aqueous buffer solution under conditions sufficient to neutralize and remove at least some amount of the phosphorus acidic compounds from the reaction fluid.

    Abstract translation: 一种用于稳定亚磷酸酯配体以防止加氢甲酰化反应流体中的降解的方法，所述方法包括向反应流体中加入环氧化物，并且还包括通过用缓冲溶液水溶液处理反应流体与反应流体分离一种或多种磷酸性化合物 在足以中和并从反应流体中除去至少一定量的磷酸性化合物的条件下进行。

    PROCESSES FOR RECOVERY OF RHODIUM FROM A HYDROFORMYLATION PROCESS
    8.
    发明申请
    PROCESSES FOR RECOVERY OF RHODIUM FROM A HYDROFORMYLATION PROCESS 有权

    公开(公告)号：US20220288574A1

    公开(公告)日：2022-09-15

    申请号：US17754163

    申请日：2020-10-20

    Applicant: Dow Technology Investments LLC

    Inventor： Marinus A. Bigi ,  Michael A. Brammer ,  Thomas C. Eisenschmid ,  Glenn A. Miller ,  George R. Phillips ,  Amarnath Singh

    IPC: B01J31/40 ,  B01J31/18

    Abstract: The present invention generally relates to processes for the recovery of rhodium from a catalyst purge stream from a C6 or higher olefin hydroformylation process. In one embodiment, the process comprises (a) treating a catalyst-containing liquid purge stream from the hydroformylation process, wherein the catalyst comprises a precious metal and an organophosphorous ligand, with an oxidant in the presence of a separate liquid aqueous phase comprising a halide-free acid at a sufficient temperature to effect oxidation of a majority of the contained organophosphorous ligand, wherein the halide-free acid is a C1-C6 organic acid or phosphorous acid; (b) recovering the aqueous phase; (c) contacting the aqueous phase with a separate organic phase by mixing the two phases under a syngas atmosphere, wherein the separate organic phase comprises water-insoluble, hydrolysable organophosphorous ligand and recycled olefin from a hydroformylation process; and (d) separating the organic phase to be recycled back to a hydroformylation process.

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