273.
    发明专利
    失效

    公开(公告)号:JP2002530373A

    公开(公告)日:2002-09-17

    申请号:JP2000583859

    申请日:1999-11-18

    Abstract: Lactam liquid media of reaction which comprise at least one lactam final product, notably epsi-caprolactam, are treated and purified to convert impurities contained therein into harmless species or species easily removed downstream, by hydrogenating such liquid media of reaction in the presence of a hydrogenation catalyst and during which hydrogenation the liquid media of reaction have effective lactam-purifying amounts of ammonia dissolved therein.

    276.
    发明专利
    失效

    公开(公告)号:JP2001512476A

    公开(公告)日:2001-08-21

    申请号:JP53650498

    申请日:1998-02-10

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