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    Separation of 4 carbon hydrocarbon mixture with recovery of highly pure 1,3-butadiene fraction
    41.
    发明专利
    Separation of 4 carbon hydrocarbon mixture with recovery of highly pure 1,3-butadiene fraction 未知

    公开(公告)号：DE19818810A1

    公开(公告)日：1999-10-28

    申请号：DE19818810

    申请日：1998-04-27

    Applicant: BASF AG

    Inventor： KINDLER KLAUS ,  PUHL HUBERT

    IPC: C07C7/08 ,  C07C9/10 ,  C07C11/08 ,  C07C11/16 ,  C07D207/38

    Abstract: Separation of a 4 carbon (C) hydrocarbon mixture (I) involves extractive distillation with N-methyl-2-pyrrolidinone (NMP) into 1,3-butadiene, butene and butane fractions and fraction(s) containing other 4 C hydrocarbons (II). The stages used comprise; (1) complete absorption of 1,3-butadiene and (II) from gaseous (I) with NMP and separating the solution (III) from a gas stream (IV) of unabsorbed butenes and butanes; (2) desorption of butadiene from (III) and separation from the liquid phase (V) containing most of (II); (3) desorption of (II) in one or more fractions from (V); (4) complete absorption of butenes in (IV) in NMP from stage (3) and separating the unabsorbed butanes; (5) desorbing the butenes from the solution; and (6) recycling the NMP free from stage (5) to one of the extraction zones. Each desorption zone operates at a lower pressure and/or higher temperature than the immediately preceding absorption or desorption zone. Separation of a 4 carbon (C) hydrocarbon mixture (I) involves extractive distillation with N-methyl-2-pyrrolidinone (NMP) into >= 4 fractions comprising (a) a 1,3-butadiene fraction, (b) a butene fraction, (c) a butane fraction and (d) fraction(s) containing other 4 C hydrocarbons (II). The stages used comprise; (1) complete absorption of 1,3-butadiene and (II) from gaseous (I) with NMP and separating the solution (III) from a gas stream (IV) of unabsorbed butenes and butanes; (2) desorption of butadiene from (III) and separation from the liquid phase (V) containing most of (II); (3) desorption of (II) in one or more fractions from (V) and separation from NMP free from 4 C hydrocarbons; (4) complete absorption of butenes in (IV) in NMP from stage (3) and separating the unabsorbed butanes and solution (VI); (5) desorbing the butenes from (VI) and separation from NMP free from 4 C hydrocarbons; and (6) recycling the NMP from stage (5) to one of the extraction zones. Each desorption zone operates at a lower pressure and/or higher temperature than the immediately preceding absorption or desorption zone.

    METHOD FOR WORKING UP CRUDE 1,3-BUTADIENE
    42.
    发明专利
    METHOD FOR WORKING UP CRUDE 1,3-BUTADIENE 未知

    公开(公告)号：CA2493080C

    公开(公告)日：2013-04-02

    申请号：CA2493080

    申请日：2003-07-23

    Applicant: BASF AG

    Inventor： HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

    IPC: C07C7/08 ,  C07C11/167

    Abstract: The invention relates to a continuous method for the separation of a mixture of hydrocarbons, obtained by extractive distillation of a C4 fraction (C4) with a selective solvent (LM) and comprising the hydrocarbons from the C4 fraction (C4), which are more soluble in the selective solvent (LM) than butane or butene. The mixture is fed to a first distillation column (K I), in which said mixture is separated into a top stream (K I-K), comprising 1,3-butadiene, propyne, optionally further low boilers and optionally water and a bottom stream (K I-S), comprising 1,3-butadiene, 1,2-butadiene, acetylene and optionally further high boilers, whereby the proportion of 1,3-butadiene in the bottom stream (K I-S) of the distillation column (K I) is regulated such as to be at least high enough to dilute the acetylene from that region with a risk of spontaneous decomposition. The top stream (K I - K) from the first distillation column (K I) is fed to a second distillation column (K II) and separated in the second distillation column (K II) into a top stream (K II-K), comprising propyne, optionally further low boilers and optionally water and a bottom stream (K II-S), comprising pure 1,3-butadiene.

    45.
    发明专利
    未知

    公开(公告)号：DE50309037D1

    公开(公告)日：2008-03-06

    申请号：DE50309037

    申请日：2003-07-23

    Applicant: BASF AG

    Inventor： HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

    IPC: C07C7/08 ,  C07C11/167

    Abstract: Sudstituted the abstract with a new abstract as follows: The invention relates to a continuous process for separation a mixture of hydrocarbons which has beenobtained by extractive distillation of C 4 fraction useing a selective solvent and the hydrocarbons from the fraction C 4 which are more readily soluble in the selective solvent than are the butanes and the butenes. The mixture is fed into a first distillation column in which it is separated into a steam which is taken off at the top and comprises 1,3-butadiene, propyne, possibly further low boilers and possibly water and a bottom stream comprising 1,3-butadiene, 1,2-butadiene, acetylenes and possibly further high boilers, with the proportion of 1,3-butadiene in the bottom stream from the distillatin column being regulated in such a way that it is at least sufficiently high to dilute the acetylenes to outside the range in which there is a risk of spontaneous decomposition. The stream taken off from the top of the first distillation column is fed to a second distillation column and is separated into a steam which is taken off at the top and comprises propyne, possibly further low boilers and possibly water and a bottom stream comprising pure 1,3-butadiene in the second distillation column.

    46.
    发明专利
    未知

    公开(公告)号：DE50113177D1

    公开(公告)日：2007-12-06

    申请号：DE50113177

    申请日：2001-11-15

    Applicant: BASF AG

    Inventor： BOHNER GERD ,  KINDLER KLAUS ,  PAHL MELANIE ,  KAIBEL GERD

    IPC: C07C11/167 ,  B01D3/14 ,  C07C7/04

    Abstract: A process for obtaining pure 1,3-butadiene from crude 1,3-butadiene by distillation is carried out in a dividing wall column in which a dividing wall is located in the longitudinal direction of the column to form an upper common column region, a lower common column region, a feed section and an offtake section.

    CONTINUOUS METHOD FOR SEPARATING A C SB 4 /SB CUT
    49.
    发明专利
    CONTINUOUS METHOD FOR SEPARATING A C SB 4 /SB CUT 未知

    公开(公告)号：PL375377A1

    公开(公告)日：2005-11-28

    申请号：PL37537703

    申请日：2003-07-22

    Applicant: BASF AG

    Inventor： ADRIAN TILL ,  HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

    IPC: B01D3/40 ,  C07C5/22 ,  C07C7/08

    Abstract: In a continuous process for fractionating a C4 fraction (C4) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (C4H10) comprising the butanes is taken off from the first region (A), a top stream (C4H8) comprising the butenes is taken off from the second region (B) and a stream (C4H6) comprising the hydrocarbons from the C4 fraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).

    50.
    发明专利
    未知

    公开(公告)号：BR0312830A

    公开(公告)日：2005-04-26

    申请号：BR0312830

    申请日：2003-07-22

    Applicant: BASF AG

    Inventor： ADRIAN TILL ,  HILLMER THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

    IPC: B01D3/40 ,  C07C5/22 ,  C07C7/08

    Abstract: In a continuous process for fractionating a C4 fraction (C4) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (C4H10) comprising the butanes is taken off from the first region (A), a top stream (C4H8) comprising the butenes is taken off from the second region (B) and a stream (C4H6) comprising the hydrocarbons from the C4 fraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).

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