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    5.
    发明专利
    未知

    公开(公告)号：BRPI0507197B1

    公开(公告)日：2014-12-30

    申请号：BRPI0507197

    申请日：2005-01-27

    Applicant: BASF AG

    Inventor： JUNGKAMP TIM ,  SCHEIDEL JENS ,  SIEGEL WOLFGANG ,  BAUMANN ROBERT ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  AECHTNER TOBIAS ,  PFAB PETER ,  DECKERT PETRA ,  BASSLER PETER

    IPC: C07C253/10 ,  C07C255/07

    Abstract: A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) isomerizing a reactant stream which comprises 2-methyl-3-butenenitrile over at least one dissolved or dispersed isomerization catalyst to give a stream 1 which comprises the at least one isomerization catalyst, 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, (b) distilling stream 1 to obtain a stream 2 as the top product which comprises 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, and a stream 3 as the bottom product which comprises the at least one isomerization catalyst, (c) distilling stream 2 to obtain a stream 4 as the top product which, compared to stream 2, is enriched in (Z)-2-methyl-2-butenenitrile, based on the sum of all pentenenitriles in stream 2, and a stream 5 as the bottom product which, compared to stream 2, is enriched in 3-pentenenitrile and 2-methyl-3-butenenitrile, based on the sum of all pentenenitriles in stream 2, (d) distilling stream 5 to obtain a stream 6 as the bottom product which comprises 3-pentenenitrile and a stream 7 as the top product which comprises 2-methyl-3-butenenitrile.

    6.
    发明专利
    未知

    公开(公告)号：BRPI0516617A

    公开(公告)日：2008-09-16

    申请号：BRPI0516617

    申请日：2005-10-12

    Applicant: BASF AG

    Inventor： DECKERT PETRA ,  BASSLER PETER ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  SCHEIDEL JENS ,  PFAB PETER ,  AECHTNER TOBIAS ,  SIEGEL WOLFGANG

    IPC: B01J38/56 ,  B01D11/04 ,  B01J31/18 ,  B01J31/24 ,  B01J31/40 ,  C07C253/10

    Abstract: A process for extractively removing homogeneously dissolved catalysts from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles with a hydrocarbon H, including performing the steps of a) concentrating the reaction effluent before step b) by distillation at pressures of from 0.1 to 5000 mbar and temperatures of from 10 to 150° C., b) adding a hydrocarbon H to the concentrated reaction effluent to obtain a stream I, and c) feeding stream I, without prior separation of the liquid phases, into an extraction apparatus and extracting it at a temperature T with the hydrocarbon H to obtain a stream II comprising the hydrocarbon H enriched with the catalyst and a stream III having a low catalyst content.

    PREPARATION OF VERY PURE, AQUEOUS HYDROXYLAMINE SOLUTIONS
    9.
    发明专利
    PREPARATION OF VERY PURE, AQUEOUS HYDROXYLAMINE SOLUTIONS 未知

    公开(公告)号：MY118793A

    公开(公告)日：2005-01-31

    申请号：MYPI9802744

    申请日：1998-06-18

    Applicant: BASF AG

    Inventor： STROFER ECKHARD ,  SCHELLING HEINER ,  WATZENBERGER OTTO ,  PFAB PETER

    IPC: B01D3/00 ,  C01B21/14

    Abstract: A VERY PURE AQUEOUS SOLUTION OF FREE HYDROXYLAMINE IS PREPARED BY A PROCESS IN WHICH THE DILUTE, AQUEOUS HYDROXYLAMINE SOLUTION IS CONCENTRATED IN A COLUMN BY REMOVING HYDROXYLAMINE-CONTAINING VAPORS VIA A SIDE TAKE-OFF IN THE BOTTOM OF THE COLUMN, AND VERY PURE HYDROXYLAMINE IS OBTAINED BY CONDENSING THE VAPORS. THE NOVEL PROCESS CAN BE CARRIED OUT SIMPLY, IN A GENTLE MANNER AND ON A LARGE SCALE AND GIVES ELECTRONIC GRADE HYDROXYLAMINE.

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