PRODUCTION OF AMINE
    1.
    发明专利

    公开(公告)号:JP2000256279A

    公开(公告)日:2000-09-19

    申请号:JP2000057164

    申请日:2000-03-02

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide an industrially practicable method for producing an amine by hydrogenation, consuming a small amount of a catalyst, greatly avoiding the occurrence of secondary reaction, capable of setting an excellent catalyst balance, excellently separating an inactive catalytic component. SOLUTION: This method comprises producing an amine by hydrogenating a compound containing at least one nitro group in the presence of a supported catalyst containing at least nickel as a catalytic active metal. The reduced and stabilized supported catalyst contains nickel microcrystal showing a two mode nickel microcrystal particle size distribution having maximum values at 30-80 Angstrom (300-800 nm) and 81-150 Angstrom (810-1,500 nm). The catalyst having 60-80 mass % nickel content, 0-20 mass % SiO2 content, 0-40 mass % ZrO2 content and 0-4 mass % HfO2 content in a reduced passivation state and at least 70% degree of reduction after further reduction for 1 hour at 100 deg.C is used.

    5.
    发明专利
    未知

    公开(公告)号:AT335721T

    公开(公告)日:2006-09-15

    申请号:AT03785813

    申请日:2003-12-13

    Applicant: BASF AG

    Abstract: The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.

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