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    Tailings Treatment Process
    1.
    发明申请
    Tailings Treatment Process 有权

    公开(公告)号：US20220081332A1

    公开(公告)日：2022-03-17

    申请号：US17419903

    申请日：2020-01-25

    Applicant: Dow Global Technologies LLC

    Inventor： Lizbeth Rostro ,  Wu Chen ,  Paul A. Gillis ,  Michael K. Poindexter

    IPC: C02F1/56 ,  C02F11/127 ,  C02F11/147 ,  B01F23/53 ,  B01F27/115 ,  B01F35/71

    Abstract: Embodiments relate continuous process for treating tailings that includes providing tailings for treatment having at least 20 wt % solids, providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding flocculants, an outlet for a mixture of the tailings and flocculants, and a rotating disk, the first inlet being separate from the second inlet, the second inlet being above the rotating disk, and the rotating disk having a tip speed at least 2 m/s, continuously introducing into the mixing apparatus the tailings through the first inlet and the flocculants through the second inlet, allowing the tailings and the flocculants to mix on the rotating disk to form the mixture of the tailings and flocculants, continuously removing the mixture of the tailings and flocculants through the outlet to form a treated mixture, and flowing the treated mixture from the mixing apparatus for further treatment or to a disposal area.

    WASTEWATER OXIDATION WITH HYDROGEN PEROXIDE INJECTED IN THE AIR-GAP OF A VESSEL
    2.
    发明申请
    WASTEWATER OXIDATION WITH HYDROGEN PEROXIDE INJECTED IN THE AIR-GAP OF A VESSEL 有权

    公开(公告)号：US20250051201A1

    公开(公告)日：2025-02-13

    申请号：US18710765

    申请日：2022-11-17

    Applicant: Dow Global Technologies LLC

    Inventor： Wu Chen ,  Lin Zhao ,  Jen-Hsiang Kao ,  Michael E. Uhl

    IPC: C02F1/72 ,  C02F103/34

    Abstract: A system for the treatment of oxidizable contaminants in wastewater includes a contaminant treatment vessel and a hydrogen peroxide supply unit. The hydrogen peroxide supply unit includes a hydrogen peroxide transfer line in fluid communication with the contaminant treatment vessel with an air-gap. A wastewater feed stream may also be in fluid communication with the contaminant treatment vessel. A contaminant treatment vessel effluent stream may also be in fluid communication with the contaminant treatment vessel. A method for the treatment of oxidizable contaminants in wastewater includes supplying wastewater to a contaminant treatment vessel, supplying hydrogen peroxide to the contaminant treatment vessel so that the supply is above the maximum filling level of the vessel in an air-gap, and contacting wastewater in the contaminant treatment vessel with hydrogen peroxide. Contacting wastewater with hydrogen peroxide reduces the concentration of oxidizable contaminants based on the concentration of oxidizable contaminants in the wastewater feed stream.

    TAILINGS TREATMENT PROCESS
    7.
    发明公开
    TAILINGS TREATMENT PROCESS 审中-公开

    公开(公告)号：US20230242432A1

    公开(公告)日：2023-08-03

    申请号：US18004792

    申请日：2021-07-08

    Applicant: Dow Global Technologies LLC

    Inventor： Lizbeth Rostro ,  Wu Chen ,  Paul A. Gillis ,  Michael K. Poindexter

    IPC: C02F11/147 ,  C02F11/127

    CPC classification number: C02F11/147 ,  C02F11/127 ,  C02F2103/10

    Abstract: Embodiments relate to a continuous process for treating tailings that includes providing tailings for treatment having at least 10 wt % solids, providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding a non-dispersion liquid flocculant that includes a polyethylene glycol having a weight average molecular weight from 100 g/mol to 2,000 g/mol, and an outlet for a mixture of the tailings and the non-dispersion liquid flocculant, continuously introducing into the mixing apparatus the tailings through the first inlet and the non-dispersion liquid flocculant through the second inlet, and allowing the tailings and the non-dispersion liquid flocculant to mix to from the mixture of the tailings and the non-dispersion liquid flocculant.

    CATALYST SEPARATION PROCESS
    8.
    发明申请
    CATALYST SEPARATION PROCESS 有权

    公开(公告)号：US20230019789A1

    公开(公告)日：2023-01-19

    申请号：US17781950

    申请日：2021-01-25

    Applicant: Dow Global Technologies LLC

    Inventor： Mrunmayi Kumbhalkar ,  Wu Chen ,  Brian Murdoch ,  Haifeng Shi ,  Lin Zhao

    IPC: B01J38/72 ,  B01J27/26 ,  B01J27/28

    Abstract: A process for separating a catalyst component from a catalyst-containing slurry by centrifugation including separating the catalyst component from the mother liquor of the catalyst-containing slurry using a stacked disc centrifuge equipped with an auto-discharging functionality. The solids discharge from the stacked disc centrifuge is enhanced by adding a washing solution to the bowl and the solids discharge chute of the stacked disc centrifuge.

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