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    ª--amino-ª+-lactams and the preparation thereof
    15.
    发明专利
    ª--amino-ª+-lactams and the preparation thereof 未知

    公开(公告)号：GB916771A

    公开(公告)日：1963-01-30

    申请号：GB2634960

    申请日：1960-07-28

    Applicant: STAMICARBON

    Inventor： OTTENHEYM JOHANNES H ,  PESCH WILLEM ,  VERSTRIJDEN ULRICH

    IPC: H01L21/145

    Abstract: The invention comprises (1) a -amino-#z-oenantholactam other than when prepared by the process disclosed in the parent Specification, and (2) the preparation of a -amino-o -lactams by reducing with hydrogen an aqueous solution of a water-soluble salt of the aciform of an a -nitro-o -lactam. Suitable watersoluble salts are formed by dissolving the a -nitro-o -lactam in aqueous ammonia and optionally adding thereto at least the equivalent amount of a corresponding a -amino-o -lactam. Sodium, potassium, aniline and other amine salts may also be used. The reaction may be carried out in the presence of hydrogenation catalysts and at elevated temperatures. Examples describe the preparation of a -amino-e -caprolactam and a -amino-#z-oenantholactam.

    PROCESS FOR REMOVING HEAVY METALS FROM SOLUTIONS
    18.
    发明专利
    PROCESS FOR REMOVING HEAVY METALS FROM SOLUTIONS 未知

    公开(公告)号：CA983240A

    公开(公告)日：1976-02-10

    申请号：CA174111

    申请日：1973-06-15

    Applicant: STAMICARBON

    Inventor： OTTENHEYM JOHANNES H ,  DASSEN BERNARDUS H N

    IPC: C22B3/00 ,  B01D15/00 ,  B01D15/04 ,  B01D53/64 ,  B01J20/24 ,  B01J45/00 ,  C02F1/28 ,  C02F1/42 ,  C02F1/52 ,  C02F1/62 ,  C09K3/00 ,  C22B3/24

    Abstract: 1401891 Removing metals from solutions; gas separation STAMICARBON BV 14 June 1973 [17 June 1972 1 May 1973 17 May 1973] 28383/73 Headings C1A and C1C [Also in Division C3] Metal values are removed from solutions or gaseous mixtures containing them by contacting the solution or mixture with a reduced keratin, a Bunte salt of a keratin or a natural or synthetic polyamide having at least some of the amide groups replaced by thioamide groups, which binds the metal values to the contacting agent. The keratin may be in the form of wool or fowls' feathers and can be converted to the Bunte salt by reaction with an alkali metal or alkaline earth metal sulphite with a tetrathionate as oxidant. The amide groups of a natural or synthetic polyamide can be replaced by thioamide groups by reaction of the polyamide with phosphorus pentasulphide. The process may particularly be applied to aqueous effluents.

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