Method for producing melamine
    1.
    发明授权
    Method for producing melamine 失效
    三聚氰胺生产方法

    公开(公告)号:US08415265B2

    公开(公告)日:2013-04-09

    申请号:US12664426

    申请日:2008-05-21

    CPC分类号: C07D251/60

    摘要: A process for the preparation of melamine by decomposition of urea with the use of a catalyst, the catalyst comprising a) 10-90% by weight of zeolite, b) 10-90% by weight of a matrix comprising silica, alumina, silicon aluminum oxides and/or clay minerals, and c) 0-10% by weight of additives and the total content of nickel and vanadium in the catalyst being less than 500 ppm.

    摘要翻译: 一种通过使用催化剂分解尿素来制备三聚氰胺的方法,所述催化剂包含a)10-90重量%的沸石,b)10-90重量%的包含二氧化硅,氧化铝,硅铝的基体 氧化物和/或粘土矿物,和c)0-10重量%的添加剂,催化剂中镍和钒的总含量小于500ppm。

    PROCESS FOR PREPARING MELAMINE
    2.
    发明申请
    PROCESS FOR PREPARING MELAMINE 有权
    制备梅林的方法

    公开(公告)号:US20100222582A1

    公开(公告)日:2010-09-02

    申请号:US12738049

    申请日:2008-10-14

    IPC分类号: C07D251/60

    CPC分类号: C07D251/60 C07D251/62

    摘要: Process for preparing melamine by converting urea in the presence of a solid catalyst in one reactor or in a plurality of reactors connected in series in the temperature range from 370° C. to 430° C., cooling and filtering the gas formed in the urea conversion, removing the melamine by desublimation and recycling a portion of the gas present after the melamine removal (“cycle gas”) into the reactor or the reactors, which comprises performing all of the above stages at a pressure in the range from 4 bar abs. to 10 bar abs.

    摘要翻译: 在固体催化剂存在下,通过在一个反应​​器或多个在370℃至430℃的温度范围内串联连接的多个反应器的反应器中转化尿素来制备三聚氰胺的方法,冷却和过滤形成在尿素中的气体 将三聚氰胺除去(“循环气体”)之后存在的气体的一部分进入反应器或反应器,从而将三聚氰胺除去,并将其中的一部分再循环到反应器或反应器中,其中包括在4巴 。 至10巴绝对

    METHOD FOR PRODUCING MEALMINE
    3.
    发明申请
    METHOD FOR PRODUCING MEALMINE 失效
    生产食品的方法

    公开(公告)号:US20100184976A1

    公开(公告)日:2010-07-22

    申请号:US12664426

    申请日:2008-05-21

    IPC分类号: C07D251/06 B01J29/072

    CPC分类号: C07D251/60

    摘要: A process for the preparation of melamine by decomposition of urea with the use of a catalyst, the catalyst comprising a) 10-90% by weight of zeolite, b) 10-90% by weight of a matrix comprising silica, alumina, silicon aluminum oxides and/or clay minerals, and c) 0-10% by weight of additives and the total content of nickel and vanadium in the catalyst being less than 500 ppm.

    摘要翻译: 一种通过使用催化剂分解尿素来制备三聚氰胺的方法,所述催化剂包含a)10-90重量%的沸石,b)10-90重量%的包含二氧化硅,氧化铝,硅铝的基体 氧化物和/或粘土矿物,和c)0-10重量%的添加剂,催化剂中镍和钒的总含量小于500ppm。