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    Propene recovery by scrubbing with a solvent/water mixture
    2.
    发明授权
    Propene recovery by scrubbing with a solvent/water mixture 有权

    公开(公告)号：US11180467B2

    公开(公告)日：2021-11-23

    申请号：US16500313

    申请日：2018-04-13

    Applicant: BASF SE

    Inventor： Nicolai Tonio Woerz ,  Ulrich Mueller ,  Andrei-Nicolae Parvulescu ,  Dominic Riedel ,  Marvin Kramp ,  Daniel Urbanczyk ,  Ulrike Wegerle ,  Christian Mueller ,  Bernd Metzen ,  Markus Weber ,  Joaquim Henrique Teles

    IPC: C07D301/32 ,  C07D301/19 ,  C07D301/12

    Abstract: The invention relates to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, propane, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propane, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propene, propane, propylene oxide, water, and the organic solvent; (iv) separating propene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous stream (S1) which is enriched in propene and propane compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream (S2) which is enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (v) separating propane from the stream (S1) in a separation zone, comprising subjecting the stream (S1) to washing conditions in a scrubber, wherein a solvent mixture comprising organic solvent and water is added as entraining agent, obtaining a bottoms stream (S3), which comprises organic solvent, water and at least 70 weight-% of the propene comprised in (S1); and a gaseous top stream (S4), which comprises at least 5 weight-% of the propane comprised in stream (S1).

    Process for preparing dioxolane
    6.
    发明授权
    Process for preparing dioxolane 有权

    公开(公告)号：US11655229B2

    公开(公告)日：2023-05-23

    申请号：US17056750

    申请日：2019-05-08

    Applicant: BASF SE ,  Kolon Plastics Inc.

    Inventor： Thomas Heitz ,  Marvin Kramp ,  Manfred Heilig ,  HyunSoo Chang ,  JongMoon Kim ,  In Gi Cho

    IPC: C07D317/12

    CPC classification number: C07D317/12

    Abstract: The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit (20) wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column (30) from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (40), withdrawing a waste water stream from the bottom of the waste water column, recycling a distillate stream (42) from the waste water column to the phase separation unit, and withdrawing a side stream (43) containing methanol from a stage below the feed stage of the waste water column.

    Process for preparing dioxolane
    7.
    发明授权
    Process for preparing dioxolane 有权

    公开(公告)号：US11655228B2

    公开(公告)日：2023-05-23

    申请号：US17056741

    申请日：2019-05-08

    Applicant: BASF SE ,  Kolon Plastics Inc.

    Inventor： Thomas Heitz ,  Marvin Kramp ,  Manfred Heilig ,  HyunSoo Chang ,  JongMoon Kim ,  In Gi Cho

    IPC: C07D317/12

    CPC classification number: C07D317/12

    Abstract: The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit (20) wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column (30) from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (40), withdrawing a waste water stream from the bottom of the waste water column, withdrawing a side stream (42) from a stage between the feed stage and the reflux stage of the waste water column and recycling this stream (42) to the phase separation unit, and withdrawing a distillate stream (43) containing methanol from the waste water column.

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