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    Process for isolating pure butyl acrylate from crude butyl acrylate by distillation, where butyl is n-butyl or isobutyl
    1.
    发明授权
    Process for isolating pure butyl acrylate from crude butyl acrylate by distillation, where butyl is n-butyl or isobutyl 有权

    公开(公告)号：US10906862B2

    公开(公告)日：2021-02-02

    申请号：US16472018

    申请日：2017-12-11

    Applicant: BASF SE

    Inventor： Ortmund Lang ,  Bernd Metzen ,  Claus Hechler

    IPC: C07C67/54 ,  B01D3/14 ,  B01D3/42 ,  C07C69/54

    Abstract: A process for isolating pure butyl acrylate from crude butyl acrylate, which is carried out in a dividing wall column having separation-active internals and a vaporizer, and in which: a dividing wall is arranged in a longitudinal direction of the column to form an upper joint column region, a lower joint column region, an inflow section having a side feed point and an offtake section having a side offtake point; a ratio of an amount of liquid at an upper end of the dividing wall going to an enrichment section and a stripping section of the column is set in the range from 1:0.2 to 1:5; and a ratio of an amount of vapor streams at a lower end of the dividing wall going to the stripping section and the enrichment section of the column is set in a range from 1:0.5 to 1:2.0.

    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 isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation
    3.
    发明授权
    Process for isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation 有权

    公开(公告)号：US10730823B2

    公开(公告)日：2020-08-04

    申请号：US16471993

    申请日：2017-12-11

    Applicant: BASF SE

    Inventor： Ortmund Lang ,  Bernd Metzen ,  Claus Hechler

    IPC: C07C67/54 ,  C07C69/54 ,  B01D3/14 ,  B01D3/22

    Abstract: A process for isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation, wherein the process is carried out in a dividing wall column having separation-active internals and a vaporizer and in which a dividing wall is arranged in the longitudinal direction of the column to form an upper joint column region, a lower joint column region, an inflow section having a side feed point, and an offtake section having a side offtake point, where the column has from 20-80 theoretical plates and the ratio of the amount of liquid at the upper end of the dividing wall going to the enrichment section and the stripping section of the column is set in the range from 1:0.2 to 1:5.

    Process for isolating pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate from the corresponding crude alkyl acrylate by distillation
    5.
    发明授权
    Process for isolating pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate from the corresponding crude alkyl acrylate by distillation 有权

    公开(公告)号：US10894223B2

    公开(公告)日：2021-01-19

    申请号：US16472054

    申请日：2017-12-11

    Applicant: BASF SE

    Inventor： Ortmund Lang ,  Bernd Metzen ,  Claus Hechler

    IPC: B01D3/14 ,  B01D3/22 ,  B01D3/42 ,  C07C67/54

    Abstract: Process for isolating pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate from the corresponding crude alkyl acrylate by distillation, wherein the process is carried out in a dividing wall column (1) which has separation-active internals and vaporizer (7) and in which a dividing wall (8) is arranged in the longitudinal direction of the column to form an upper joint column region (9), a lower joint column region (14), an inflow section (10, 12) having a side feed point (2) and an offtake section (11, 13) having a side offtake point (3), the column has a number of theoretical plates in the range from 10 to 60, where the number of theoretical plates of the dividing wall column (1) relates to the sum of the theoretical plates in the joint upper column region (9), the joint lower column region (14) and the inflow section (10, 12), the side feed point (2) for the corresponding crude alkyl acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate, the side offtake point (3) for the pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate and the dividing wall (8) is arranged in the column in the region commencing at least one theoretical plate above the bottommost theoretical plate and ending at least one theoretical plate below the uppermost theoretical plate, where the ratio of amount of liquid at the upper end of the dividing wall (8) going to the enrichment section (10) and the stripping section (11) of the column is set in the range from 1:0.2 to 1:5.

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