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    Method for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation
    5.
    发明授权
    Method for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation 有权

    公开(公告)号：US10370310B2

    公开(公告)日：2019-08-06

    申请号：US16069553

    申请日：2017-01-11

    Applicant: BASF SE ,  Linde AG

    Inventor： Jan Pablo Josch ,  Georgios Karanikoulis ,  Oliver Hammen ,  Claudia Mossbacher ,  Ulrike Wenning ,  Anton Wellenhofer ,  Christine Toegel ,  Hendrik Reyneke

    IPC: C07C5/48 ,  C07C7/06 ,  C07C7/08 ,  C07C7/11 ,  C07C7/00 ,  C07C7/04

    Abstract: The invention relates to a method for producing butadiene from n-butenes having the steps: A) providing a feed gas stream a comprising n-butenes; B) feeding the feed gas stream a comprising the n-butenes and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, wherein a product gas stream b comprising butadiene, unreacted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling minor components, possibly carbon oxides and possibly inert gases is obtained; Ca) cooling the product gas stream b by contacting it with a refrigerant and condensing at least a part of the high-boiling minor components; Cb) compressing the remaining product gas stream b in at least one compression stage, wherein at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases are obtained; Da) separating off non-condensable and low-boiling gas components comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbon-comprising butadiene and n-butenes in an absorbent, wherein an absorbent stream loaded with C4 hydrocarbons and the gas stream d2 are obtained, and Db) subsequent desorption of the C4 hydrocarbons from the loaded absorbent stream in a desorption column, wherein a C4 product gas stream d1 is obtained, wherein a polymerization inhibitor is added in step Db) at the column head of the desorption column.

    Process for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation
    6.
    发明授权
    Process for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation 有权

    公开(公告)号：US10358399B2

    公开(公告)日：2019-07-23

    申请号：US15523862

    申请日：2015-11-02

    Applicant: BASF SE ,  Linde AG

    Inventor： Philipp Grüne ,  Stephan Deublein ,  Christian Walsdorff ,  Jan Pablo Josch ,  Rainer Rahm ,  Hendrik Reyneke ,  Anton Wellenhofer ,  Ulrike Wenning ,  Christine Toegel ,  Heinz Boelt

    IPC: C07C5/48 ,  B01D3/40 ,  C07C7/05 ,  C07C7/04 ,  C07C7/08 ,  C07C7/11 ,  C07C7/00 ,  C07C11/167

    Abstract: A process for preparing butadiene from n-butenes, comprising the steps of: A) providing an input gas stream comprising n-butenes; B) feeding the input gas stream comprising n-butenes and a gas containing at least oxygen into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream; Ca) cooling the product gas stream by contacting with a circulating cooling medium in at least one cooling zone; Cb) compressing the cooled product gas stream in at least one compression stage, giving at least one aqueous condensate stream c1 and one gas stream c2; D) removing uncondensable and low-boiling gas constituents comprising oxygen and low-boiling hydrocarbons as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbons in an absorbent, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and then desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1; E) separating the C4 product stream d1 by extractive distillation; F) distilling the stream e1 into a stream f1 consisting essentially of the selective solvent and a stream f2 comprising butadiene; G) removing a portion of the aqueous phase of the cooling medium which circulates in step Ca) as aqueous purge stream g; H) distillatively separating the aqueous purge stream g into a fraction h1 and a fraction h2 depleted of organic constituents.

    Process for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation
    7.
    发明授权
    Process for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation 有权

    公开(公告)号：US10421700B2

    公开(公告)日：2019-09-24

    申请号：US15561711

    申请日：2016-03-23

    Applicant: BASF SE ,  Linde AG

    Inventor： Jan Pablo Josch ,  Ragavendra Prasad Balegedde Ramachandran ,  Christian Walsdorff ,  Regina Benfer ,  Anton Wellenhofer ,  Ulrike Wenning ,  Heinz Boelt ,  Hendrik Reyneke ,  Christine Toegel

    IPC: C07C5/48 ,  C07C7/00 ,  C07C7/08 ,  C07C7/09 ,  C07C7/11 ,  C07C11/167

    Abstract: The invention relates to a process for producing butadiene from n-butenes which comprises the steps of: A) providing a vaporous n-butenes-comprising input gas stream a1 by evaporating a liquid n-butenes-comprising stream a0; B) introducing the vaporous n-butenes-comprising input gas stream a1 and an at least oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene to obtain a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases, Ca) chilling the product gas stream b by contacting with a cooling medium comprising an organic solvent in at least one chilling zone, the cooling medium being at least partially recycled into the chilling zone, Cb) compressing the chilled product gas stream b which is possibly depleted of high-boiling secondary components in at least one compression stage to obtain at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases, D) removing noncondensable 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 absorbing the C4 hydrocarbons comprising butadiene and n-butenes into an absorption medium to obtain a C4-hydrocarbons-laden absorption medium stream and the gas stream d2 and subsequently desorbing the C4 hydrocarbons from the laden absorption medium stream to obtain a C4 product gas stream d1, wherein at least some of the recycled cooling medium from step Ca) is brought into thermal contact with the liquid n-butenes-comprising stream a0 in one or more indirect heat exchangers and at least some of the liquid n-butenes-comprising stream a0 is evaporated by indirect heat transfer with the recycled cooling medium.

    Method for preparing 1,3-butadiene from N-butenes by oxidative dehydrogeneation
    8.
    发明授权
    Method for preparing 1,3-butadiene from N-butenes by oxidative dehydrogeneation 有权

    公开(公告)号：US10647639B2

    公开(公告)日：2020-05-12

    申请号：US16074454

    申请日：2017-01-30

    Applicant: BASF SE ,  Linde AG

    Inventor： Jan Pablo Josch ,  Ragavendra Prasad Balegedde Ramachandran ,  Ulrike Wenning ,  Anton Wellenhofer ,  Christine Toegel ,  Hendrik Reyneke ,  Heinz Boelt

    IPC: C07C5/48 ,  C07C7/08 ,  C07C7/11 ,  C07C11/08 ,  C07C11/167

    Abstract: The invention relates to a method for producing butadiene from n-butenes having the steps: A) providing an n-butene-comprising feed gas stream a; B) feeding the n-butene-comprising feed gas stream a and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, wherein a product gas stream b comprising butadiene, unreacted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling minor components, optionally carbon oxides and optionally inert gases is obtained; Ca) cooling the product gas stream b by contacting it with a refrigerant and condensing at least a part of the high-boiling minor components; Cb) compressing the remaining product gas stream b in at least one compression step, wherein at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; Da) separating off non-condensable and low-boiling gas components comprising oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an absorption medium, wherein an absorption medium stream loaded with C4 hydrocarbons and the gas stream d2 are obtained, and Db) subsequently desorbing the C4 hydrocarbons from the loaded absorption medium stream in a desorption column, wherein a C4 product gas stream d1 is obtained, Dc) separating off the steam condensate from the absorption medium in a phase separator and vaporizing it in a steam generator and providing it again as stripping gas in the desorption column, wherein, the steam condensate before the vaporization in a steam generator, is subjected to a pretreatment in a further method step.

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