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).

    9.
    发明专利
    未知

    公开(公告)号:BR0207063A

    公开(公告)日:2008-07-22

    申请号:BR0207063

    申请日:2002-02-06

    Applicant: BASF AG

    Abstract: An organic compound having at least one C-C double bond is epoxidized by means of hydrogen peroxide in the presence of at least one catalytically active compound and at least one solvent, wherein a product mixture comprising alpha-hydroperoxyalcohols is reduced using at least one reducing agent. The process advantageously comprises at least the following steps: (i) reacting an organic compound having at least one C-C double bond with hydrogen peroxide in the presence of at least one catalytically active compound and at least one solvent to give a product mixture P1 comprising alpha-hydroperoxyalcohols; (ii) separating an epoxide formed in the reaction in step (i) and the unreacted organic compound having at least one C-C double bond from P1 or P1' to give a product mixture P2 or P2', where P2 comprises the alpha-hydroperoxyalcohols formed as by-product in the reaction in step (i) and P2' is largely free of alpha-hydroperoxyalcohols; (iii) treating P1 and/or P2 with at least one reducing agent so that the alpha-hydroperoxyalcohols are converted into corresponding glycols to give a product mixture P1' or P3.

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