IMPROVED METHOD FOR PRODUCING HEXAMETHYLENE DIAMINE

    公开(公告)号:CA2342178C

    公开(公告)日:2008-12-02

    申请号:CA2342178

    申请日:1999-08-17

    Applicant: BASF AG

    Abstract: The invention relates to a method for the catalytic hydrogenation of adipodinitrile to hexamethylene diamine at a high temperature and at high pressure in the presence of catalysts based on elementary iron as th e catalytic component, and ammonia as a solvent. The method is characterised in that a) adipodinitrile is hydrogenated at temperatures o f 70 to 220 .degree.C and at pressures of 100 to 400 bar in the presence of catalysts based on elementary iron as the catalytic component, and ammoni a as a solvent to produce a mixture containing adipodinitrile, 6-aminocapronitrile, hexamethylene diamine and high boilers, until the sum o f the 6-aminocapronitrile and adipodinitrile concentration is 1 to 50 wt. 3% in relation to the ammonia-free hydrogenation mixture; b) ammonia is separated out of the hydrogenation discharge; c) hexamethylene diamine is separated out of the remaining mixture; d) 6- aminocapronitrile and adipodinitrile are separated from the high boilers together or separately and e) 6-aminocapronitrile, adipodinitrile or their mixtures are returned to step a).

    METHOD FOR PRODUCING CYCLIC LACTAMS

    公开(公告)号:MY125884A

    公开(公告)日:2006-08-30

    申请号:MYPI9801951

    申请日:1998-04-30

    Applicant: BASF AG

    Abstract: THE DISCLOSURE IS A PROCESS FOR PREPARING CYCLIC LACTAMS OF THE FORMULA 1:WHERE R1 IS HYDROGEN, ALKYL, CYCLOALKYL OR ARYL, AND A IS C3-C12-ALKYLENE UNSUBSTITUTED OR SUBSTITUTED BY 1,2, 3, 4, 5 OR 6 SUBSTITUTUENTS SELECTED INDEPENDENTLY OF ONE ANOTHER FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL AND ARYL, BY CONVERSION OF AN W-AMINOCARBONITRILE OF THE FORMULA 2;ER1N -A – CN WHERE R1 AND A ARE EACH AS DEFINED ABOVE, IN THE PRESENCE OF AT LEAST ONE CATALYST, WHICH COMPRISES CONVERTING SAID NITRILE II INTO AN OLIGOMER MIXTURE, AND TREATING WITH SUPERHEATED STEAM.

    MANUFACTURING PROCESS FOR 6-AMINOCAPRONITRILE

    公开(公告)号:MY119330A

    公开(公告)日:2005-05-31

    申请号:MYPI9703536

    申请日:1997-08-02

    Applicant: BASF AG

    Abstract: MANUFACTURE OF 6-AMINOCAPRONITRILE OR 6-AMINOCAPRONITRILE/ HEXAMETHYLENEDIAMINE DIAMINE MIXTURES, INVOLVINGA)THE REACTING AT LEAST ONE PENTENENITRILE SELECTED FROM THE GROUP CONSISTING OF 2,3 AND 4-PENTENENITRILE, WITH CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF A CATALYST, WITH CONTAIN AT LEAST ONE ELEMENT OF THE EIGHTH SUBGROUP AS ACTIVE COMPONENT ,OBTAIN A HYDROFORMYLATION FORMYLATING DISCHARGE (I), B)THE OPTIONAL SEPARATION OF CARBON MONOXIDE, HYDROGEN AND THE CATALYST FROM THE HYDROFORMYLATION FORMYLATING DISCHARGE (I), OBTAIN A HYDROFORMYLATION FORMYLATING DISCHARGE (II),C)THE SEPARATION OF 5-FORMYL VALERONITRILE FROM THE HYDROGENATION FORMYLATING DISCHARGE (I) OR (II),D)THE REACTION OF 5-FORMYL VALERONITRILE WITH AMMONIA AND HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF RHENIUM, COPPER AND ITS COMPOUNDS AS WELL AS METALS AND METALLIC COMPOUNDS OF THE EIGHT GROUP, OBTAINING A HYDROGENATION DISCHARGE , AND E)OBTAINING 6-AMINOCAPRONITRILE AND IF NECESSARY HEXAMETHYLENE- DIAMINE .

    20.
    发明专利
    未知

    公开(公告)号:DE59910856D1

    公开(公告)日:2004-11-18

    申请号:DE59910856

    申请日:1999-07-15

    Applicant: BASF AG

    Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 60 mol % and an average molecular weight Mn of 800-3000 dalton by cationic polymerization in the liquid phase of isobutene over an acidic, essentially halogen-free heterogeneous catalyst, wherea) a hydrocarbon mixture of essentially C4-hydrocarbons comprising isobutene in an amount of from 10 to 80% by weight is used as the starting material andb) polymerization is carried out continuously at from -30 to 0° C. with average starting material residence times of one hour or less, where the temperature and the residence time are selected such that the isobutene conversion is less than 60% and, after separation from the resulting polyisobutene, the isobutene is either enriched in the partially converted hydrocarbon mixture and returned to the polymerization or passed to another isobutene reaction coupled with the polymerization.

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