13.
    发明专利
    失效

    公开(公告)号:JPS4966689A

    公开(公告)日:1974-06-27

    申请号:JP10833872

    申请日:1972-10-27

    Process for preparing lactams
    14.
    发明授权
    Process for preparing lactams 失效
    制备内酰胺的方法

    公开(公告)号:US08772477B2

    公开(公告)日:2014-07-08

    申请号:US13260268

    申请日:2010-04-27

    Inventor: Philippe Leconte

    CPC classification number: C07D201/08 C07D223/10

    Abstract: A method for preparing lactams by cyclizing hydrolysis of a corresponding aminonitrile is described. A method for manufacturing a lactam by reacting an aminonitrile with water in the presence of a catalyst involving placing the water and the aminonitrile in contact in vapor phase, passing the mixture of vapors through a bed of catalyst arranged in at least one tube forming a reaction chamber and recovering the lactam at the outlet of the tube is also described.

    Abstract translation: 描述了通过环化相应的氨基腈的水解制备内酰胺的方法。 一种在催化剂存在下使氨基腈与水反应的方法,所述催化剂涉及使水和氨基腈气相接触,使蒸汽混合物通过排列在形成反应的至少一个管中的催化剂床 还描述了在管的出口处回收内酰胺的腔室。

    Process for recovery of {68 -caprolactam from a reaction mixture of {68 -caprolactam and sulphuric acid
    17.
    发明授权
    Process for recovery of {68 -caprolactam from a reaction mixture of {68 -caprolactam and sulphuric acid 失效
    从{68-己内酰胺和硫酸的反应混合物中回收{68-己内酰胺的方法

    公开(公告)号:US3907781A

    公开(公告)日:1975-09-23

    申请号:US48260174

    申请日:1974-06-24

    Applicant: STAMICARBON

    CPC classification number: C07D201/16 E05Y2900/104

    Abstract: Epsilon -CAPROLACTAM IS RECOVERED FROM A Beckmann rearrangement mixture of the lactam and aqueous sulfuric acid by simultaneously neutralizing the rearrangement mixture with ammonia at a pressure of 1-5 atmospheres and crystallizing out ammonium sulfate, the heat liberated by the neutralization reaction is removed from the system by evaporating a portion of the water from the solution. At the conditions employed hydrolysis of the lactam is substantially reduced if not entirely avoided.

    Abstract translation: 通过在1-5个大气压的压力下同时用氨中和重排混合物并结晶出硫酸铵,将ε-CAPROLACTAM从内酰胺和硫酸水溶液的贝克曼重排混合物中回收,中和反应释放的热量从 系统通过从溶液中蒸发一部分水。 在使用条件下,如果不完全避免,内酰胺的水解将显着降低。

    Method for preventing organic compound from deteriorating
    20.
    发明专利
    Method for preventing organic compound from deteriorating 有权
    用于预防有机化合物的方法

    公开(公告)号:JP2003081885A

    公开(公告)日:2003-03-19

    申请号:JP2001278006

    申请日:2001-09-13

    Abstract: PROBLEM TO BE SOLVED: To provide a method for preventing a material belonging to the 4th class of dangerous material designated by the Fire Services Act from deteriorating during its preservation and conveyance in shipping by filling it in a container.
    SOLUTION: This method for preventing the material belonging to the 4th class of dangerous material designated by the Fire Services Act and filled in the container of 10 L-30 kL volume from deteriorating is provided by filing the material under an oxygen concentration reduced to ≤4 vol.% by introducing nitrogen gas into the container, then further introducing nitrogen gas to make the oxygen concentration of ≤300 vol. ppm and hermetically sealing the container.
    COPYRIGHT: (C)2003,JPO

    Abstract translation: 要解决的问题:提供一种防止属于“消防法”第4类危险物品的材料的方法,通过将其装入容器中,将其在运输过程中的保存和运输过程中恶化。 解决方案:通过在氧浓度降低至<= 1时提供材料,防止属于“消防法”第4类危险物质的材料,并装满10 L-30 kL容积的容器, 通过将氮气引入容器中,然后进一步引入氮气使氧浓度<300体积%。 ppm并密封容器。

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