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    Propene recovery by scrubbing with a solvent/water mixture
    1.
    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 the Oxidative Dehydrogenation of N-Butenes to Butadiene
    5.
    发明申请
    Process for the Oxidative Dehydrogenation of N-Butenes to Butadiene 审中-公开

    公开(公告)号：US20140200379A1

    公开(公告)日：2014-07-17

    申请号：US14150239

    申请日：2014-01-08

    Applicant: BASF SE

    Inventor： Jan Pablo Josch ,  Alexander Weck ,  Sonja Giesa ,  Steffen Büteborn ,  Ragavendra Prasad Balegedde Ramachandran ,  Regina Benfer ,  Markus Weber

    IPC: C07C5/48

    CPC classification number: C07C5/48 ,  C07C7/08 ,  C07C7/11 ,  C07C11/167

    Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; C) cooling and compression of the product gas stream b in at least one compression stage, giving at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by Da) absorption of the C4-hydrocarbons comprising butadiene and n-butenes in a high-boiling absorption medium, giving an absorption medium stream loaded with C4-hydrocarbons and the gas stream d2, Db) removal of oxygen from the absorption medium stream loaded with C4-hydrocarbons by stripping with an inert gas and Dc) desorption of the C4-hydrocarbons from the loaded absorption medium stream to give a C4 product gas stream d1 which consists essentially of C4-hydrocarbons and comprises less than 100 ppm of oxygen; E) separation of the C4 product stream d1 by extractive distillation with a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a butadiene-comprising stream f2.

    Process for the preparation of propylene oxide
    10.
    发明授权
    Process for the preparation of propylene oxide 有权

    公开(公告)号：US10544115B2

    公开(公告)日：2020-01-28

    申请号：US16076600

    申请日：2017-02-16

    Applicant: BASF SE

    Inventor： Dominic Riedel ,  Joaquim Henrique Teles ,  Heiner Schelling ,  Ulrike Wegerle ,  Ulrich Mueller ,  Andrei-Nicolae Parvulescu ,  Jochen Mannweiler ,  Timo Henn ,  Thomas Luederitz ,  Nicolai Tonio Woerz ,  Christian Mueller ,  Markus Weber ,  Daniel Urbanczyk

    IPC: C07D301/12 ,  C07D301/36 ,  B01J19/00 ,  B01J29/70 ,  C07D303/04

    Abstract: A continuous process for the preparation of propylene oxide, comprising a start-up stage and normal run stage, wherein the normal run stage comprises (i) continuously providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, a formate salt, water and optionally propane, wherein in the liquid feed stream, the molar amount of the formate salt relative to the molar amount of hydrogen peroxide at a given point of time during the normal run stage is aN(Fo/H2O2); (ii) continuously passing the liquid feed stream provided in (i) into an epoxidation zone comprising a catalyst comprising a titanium zeolite having framework type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the formate salt, optionally propene, and optionally propane; (iii) continuously removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the formate salt, optionally propene, and optionally propane; wherein the normal run stage is characterized in an average rate of change of aN(Fo/H2O2) of less than 0 h−1.

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