Dehydration of ethylene diamine using piper - idine

    公开(公告)号:DE1955827A1

    公开(公告)日:1971-05-13

    申请号:DE1955827

    申请日:1969-11-06

    Applicant: BASF AG

    Abstract: Aqs. ethylene diamine is distilled in the presence of piperidine as an azeotrope former. The azeotrope may be dehydrated by distillation with a hydrocarbon, partic. benzene. Ethylene diamine is used in complex formation, plant protection agents and as an epoxide resin hardener.

    N-mono-and n,n'-bis-hydroxy alkyl piperaines - prodn using inert polar solvents

    公开(公告)号:DE1954546A1

    公开(公告)日:1971-05-06

    申请号:DE1954546

    申请日:1969-10-30

    Applicant: BASF AG

    Abstract: High yields of pure N-mono- and N,N'-bis-hydroxyalkylpiperazines for use as pharmaceutical intermediates are obtained by reacting piperazine with alkylene oxides, esp ethylene oxide in inert polar solvents, b.p. 130-170 degrees at ordinary pressure (an alcohol, an ether or ether alcohol e.g. ethylene-glycol-mono-n-propylether, or an ester e.g. isoamylacetate), and dissolving at least 5 w/% piperazine at 50 degrees. Slightly raised pressures and temp. of 80-120 degrees are favoured. No catalysts are required.

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