21.
    发明专利
    未知

    公开(公告)号:DE19839338A1

    公开(公告)日:2000-03-02

    申请号:DE19839338

    申请日:1998-08-28

    Applicant: BASF AG

    Abstract: The invention relates to a method for simultaneous preparation of 6-aminocapronitrile and hexamethylene diamine from adipodinitrile, comprising the following steps: a) hydrogenating adipodinitrile in the presence of a catalyst containing an element of the eight subgroup as catalytically active component to obtain a mixture containing 6-aminocapronitrile, hexamethylene diamine, adipodinitrile and high boilers; b) separating by distillation hexamethylene diamine from the mixture containing 6-aminocapronitrile, hexamethylene diamine, adipodinitrile and high boilers and c1) separating by distillation 6-aminocapronitrile and subsequently d1) separating by distillation adipodinitrile or c2) simultaneously separating by distillation 6-aminocapronitrile and adipodinitrile into separate fractions. The method is characterized in that the temperature of the bottom in steps d1) or c2) is below 185 DEG C.

    25.
    发明专利
    未知

    公开(公告)号:DE10233387A1

    公开(公告)日:2004-02-12

    申请号:DE10233387

    申请日:2002-07-23

    Applicant: BASF AG

    Abstract: The invention relates to a continuously operated process for the purification by distillation of the oxirane formed in the oxirane synthesis by reaction of a hydroperoxide with an organic compound, wherein the crude oxirane is separated in a dividing wall column into low-, intermediate- and high-boiling fractions and the oxirane is taken off as intermediate boiler at the side offtake in a concentration of at least 99.9%.

    26.
    发明专利
    未知

    公开(公告)号:DE10233383A1

    公开(公告)日:2004-02-12

    申请号:DE10233383

    申请日:2002-07-23

    Applicant: BASF AG

    Abstract: Continuously operated process for the intermediate isolation of the oxirane formed by reaction of a hydroperoxide with an organic compound in the oxirane synthesis, wherein the product mixture formed in the synthesis is fractionated in a dividing wall column to give a low-boiling fraction, an intermediate-boiling fraction and a high-boiling fraction and the oxirane is taken off in the intermediate-boiling fraction at the side offtake and the hydroperoxide is taken off in the high-boiling fraction at the bottom of the column.

    27.
    发明专利
    未知

    公开(公告)号:DE10233381A1

    公开(公告)日:2004-01-29

    申请号:DE10233381

    申请日:2002-07-23

    Applicant: BASF AG

    Abstract: Process for the continuously operated distillation of the solvent used in the synthesis of an oxirane by reaction of a hydroperoxide with an organic compound, wherein the mixture comprising the solvent which is obtained in the synthesis and subsequent work-up is separated in a dividing wall column into a low-boiling fraction, an intermediate-boiling fraction and a high-boiling fraction and the solvent is taken off as intermediate-boiling fraction from the side offtake of the column.

    29.
    发明专利
    未知

    公开(公告)号:DE10049265A1

    公开(公告)日:2002-04-11

    申请号:DE10049265

    申请日:2000-09-28

    Applicant: BASF AG

    Abstract: The invention relates to a method for separating pentenenitrile isomers having a relative volatility alpha in the region 1.0 - 1.3 in a pressure range of 1 - 500 kPa by means of separation. According to said method, the distillation is carried out in the presence of a liquid diluent which forms azeotropes with the pentenenitrile isomers in the same pressure conditions, whose relative volatility alpha is higher than the pentenenitrile isomers which are to be separated.

    30.
    发明专利
    未知

    公开(公告)号:DE10047703A1

    公开(公告)日:2002-04-11

    申请号:DE10047703

    申请日:2000-09-25

    Applicant: BASF AG

    Abstract: A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NH 2 groups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein a) the feed of the compound to be hydrogenated is stopped and b) the heterogeneous catalyst is treated with a compound of the formula R 1 R 2 N-CO-R 3 (I), in which R 1 is hydrogen or C 1 -C 4 alkyl and R 2 , R 3 independently of one another are each hydrogen or C 1 -C 4 alkyl or together are a C 3 -C 6 alkylene group, or mixtures of such compounds, at a pressure ranging from 0.1 to 30 MPa and a temperature ranging from 100 to 300° C., with the proviso that the compound of formula (I) is in liquid form during the treatment.

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