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    METHOD FOR WORKING UP CRUDE 1,3-BUTADIENE
    13.
    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.

    16.
    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.

    19.
    发明专利
    未知

    公开(公告)号：AT343561T

    公开(公告)日：2006-11-15

    申请号：AT03794858

    申请日：2003-08-08

    Applicant: BASF AG

    Inventor： FUNKE FRANK ,  HILL THOMAS ,  VON WATZDORF JOBST RUEDIGER ,  MATTMANN WOLFGANG ,  HARDER WOLFGANG ,  HENKES ERHARD ,  LITTMANN GERD ,  JULIUS MANFRED

    IPC: C07C209/86 ,  B01D3/14 ,  C07C209/84 ,  C07C211/36

    Abstract: Recovery of isophoronediamine (IPDA) comprises preparation of IPDA having a cis/trans isomer ratio of less than 73/27 and separation into at least 5 fractions by distillation including an IPDA fraction having a cis/trans ratio of greater than 73/27 and a fraction having a cis/trans ratio of less than 66/34. A process for the recovery of 3-aminomethyl-3,5,5-trimethylcyclohexylamine (isophoronediamine, IPDA) comprises; (a) preparation of IPDA having a cis/trans isomer ratio of less than 73/27; (b) introduction of IPDA to the middle region of a distillation column having inserts and distillation of IPDA at 5-300 degreesC and 10-2000 mbar; (c) optionally further purification of the IPDA from (b) by distillation in at least one further column whereby the IPDA from step (b) and (c) are separated into at least 5 fractions comprising an organic fraction (1a) containing impurities having a lower b. pt. than trans-IPDA, an aqueous fraction (1b) containing impurities having a lower b. pt. than trans-IPDA, a fraction (2) containing impurities having a higher b. pt. than cis-IPDA, an IPDA fraction (3) having a cis/trans ratio of greater than 73/27 and an IPDA fraction (4) having a cis/trans ratio of less than 66/34.

    CONTINUOUS METHOD FOR SEPARATING A C SB 4 /SB CUT
    20.
    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).

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