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    TRICYANOHEXANE PURIFICATION METHODS
    3.
    发明公开
    TRICYANOHEXANE PURIFICATION METHODS 审中-公开

    公开(公告)号：US20230416192A1

    公开(公告)日：2023-12-28

    申请号：US18462780

    申请日：2023-09-07

    申请人： Ascend Performance Materials Operations LLC

    发明人： Sanjay Dube ,  Darrick Elmore

    IPC分类号： C07C253/34

    CPC分类号： C07C253/34

    摘要： Provided herein are processes for purifying TCH in a feed stream, such as an adiponitrile process stream. The processes include a first separating step of separating the adiponitrile process stream to form a first overhead stream comprising low-boiling components and high-boiling components and a first bottoms stream comprising high-boiling components. The processes also include a second separating step of separating the first overhead stream in one or more distillation columns to form a lights stream comprising low-boiling components, a heavies stream comprising high-boiling components, and a TCH stream.

    POLYAMIDE ELASTOMERS WITH HIGH MELTING POINTS
    6.
    发明公开
    POLYAMIDE ELASTOMERS WITH HIGH MELTING POINTS 审中-公开

    公开(公告)号：US20230365753A1

    公开(公告)日：2023-11-16

    申请号：US18315153

    申请日：2023-05-10

    申请人： Ascend Performance Materials Operations LLC

    发明人： Jacob G. Ray ,  Ramesh Ramakrishnan

    IPC分类号： C08G69/28

    CPC分类号： C08G69/28

    摘要： A method of producing a polyamide elastomer comprising feeding a salt solution having a solids content of greater than or equal to 80% to a reactor having a phosphorous containing catalyst having a phosphorous level from 5 to 1000 part by million based on the total weight of the catalyst, feeding a polyether amine to the reactor, and reducing the pressure in the reactor once a target temperature is reached to polymerize the salt solution and the polyether amine to form the polyamide elastomer. The polyamide elastomer has particular uses as a cable tie and demonstrates improved cold-temperature applications while maintaining high strength, good flammability rating, and excellent processability.

    ACETONITRILE SEPARATION PROCESS
    10.
    发明公开
    ACETONITRILE SEPARATION PROCESS 审中-公开

    公开(公告)号：US20230192600A1

    公开(公告)日：2023-06-22

    申请号：US18068645

    申请日：2022-12-20

    申请人： Ascend Performance Materials Operations LLC

    发明人： Pascal Bolomey ,  Kyle Kissell ,  Basil Michaels ,  Nick Sparkman ,  Zhensheng Ding

    IPC分类号： C07C253/34

    CPC分类号： C07C253/34

    摘要： A process for producing acetonitrile, the process comprising dehydrating a feedstock stream comprising acetonitrile, acrylonitrile, allyl alcohol, and water (and optionally methanol) in a dehydration (first) column to yield a dehydrated acetonitrile stream comprising acetonitrile and acrylonitrile, less than 1 wt % allyl alcohol, and less than 50 wt % water, and optionally hydrogen cyanide; distilling the dehydrated acetonitrile stream in a lights (second) column to yield a distillate stream comprising lights, and a bottoms stream comprising acetonitrile, acrylonitrile, water, and optionally hydrogen cyanide and acrylonitrile; extracting the distillation bottoms stream in an extraction (third) column to yield a raffinate stream comprising acetonitrile and less than 200 ppm acrylonitrile and an extract stream comprising water and acrylonitrile; purifying the raffinate stream to yield a product acetonitrile stream.