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    Production of melamine
    1.
    发明授权
    Production of melamine 失效
    生产梅林

    公开(公告)号：US3657236A

    公开(公告)日：1972-04-18

    申请号：US3657236D

    申请日：1969-11-19

    Applicant: BASF AG

    Inventor： FROMM HERMANN DIETER ,  LEONHARD KARL WILHELM ,  MOHR RUDOLF ,  SCHWARZMANN MATTHIAS ,  WOEHRLE HORST

    IPC: B24B9/14 ,  C07D251/60 ,  C07D55/28

    CPC classification number: C07D251/60

    Abstract: TO PRODUCE MELAMINE, UREA AND/OR ITS THERMAL DECOMPOSITION PRODUCTS ARE REACTED AT 220* TO 400*C. IN CONTACT WITH AN ALUMINUM OXIDE HAVING A LARGE SURFACE AREA IN THE PRESENCE OF AMMONIA. THE ALUMINUM OXIDE USED HAS BEEN OBTAINED BY TREATMENT OF HYDROXIDES OF ALUMINUM (WHICH HAVE NOT BEEN PREVIOUSLY CALCINED) WITH UREA AND/OR ITS THERMAL DECOMPOSITION PRODUCTS AT TEMPERATURES OF FROM 150* TO 400*C. THE AVERAGE OF ALUMINUM OXIDE ACTIVATED IN THIS MANNER OVER ALUMINUM OXIDE OBTAINED BY CALCINING ALUMINUM HYDROXIDE CONSIST IN INCREASED UREA CONVERSION AND GREATER ATTRITION RESISTANCE.

    Process for the manufacture of crystalline berylloaluminosilicates
    4.
    发明授权
    Process for the manufacture of crystalline berylloaluminosilicates 失效
    结晶铍铝硅酸盐的制造方法

    公开(公告)号：US3911088A

    公开(公告)日：1975-10-07

    申请号：US41584073

    申请日：1973-11-15

    Applicant: BASF AG

    Inventor： MAROSI LASZLO ,  RIPPERGER WILLI ,  SCHWARZMANN MATTHIAS

    IPC: B01J29/04 ,  C01B39/20 ,  C01B33/28

    CPC classification number: B01J29/04 ,  C01B33/2884

    Abstract: Berylloaluminosilicates having faujasite structure are described. These beryllium zeolites (Y-zeolites) can have substantially higher Al2O3/SiO2 ratios than the berylliumfree aluminosilicates of similar structure; they can be obtained hydrothermally from aqueous mixtures of the components and can be used instead of the faujasites in industrial processes involving absorption or catalysts.

    Abstract translation: 描述了具有八面沸石结构的铍铝硅酸盐。 这些铍沸石（Y-沸石）可以具有比类似结构的无铍铝硅酸盐更高的Al 2 O 3 / SiO 2比率; 它们可以由组分的水混合物水热获得，并且可以用于涉及吸收或催化剂的工业过程中的八面沸石。

    Manufacture of melamine
    6.
    发明授权
    Manufacture of melamine 失效
    制造三聚氰胺

    公开(公告)号：US3895007A

    公开(公告)日：1975-07-15

    申请号：US35309973

    申请日：1973-04-20

    Applicant: BASF AG

    Inventor： SCHWARZMANN MATTHIAS ,  WIDMANN ALFRED ,  VOGEL LUDWIG ,  FROMM DIETER

    IPC: C07D251/60 ,  C07D20060101 ,  C07D55/28

    CPC classification number: C07D251/60

    Abstract: Catalytic manufacture of melamine from urea by thermal cracking of urea and converting the resulting cracked gases to melamine in the presence of catalysts. The thermal decomposition is carried out in a fluidized bed, the necessary heat being applied by heat exchangers located in the fluidized bed. Conversion of the cracked gases to melamine is effected either in the same fluidized bed, in which case the fluidized solid consists of conventional catalysts, or in a reaction zone remote from said fluidized bed. In the latter case, the solids fluidized consist of catalytically inactive particles, the conversion being carried out in the presence of catalysts in said reaction zone remote from the fluidized bed. In both cases, the urea is fed to the fluidized bed at a point above the heat exchangers.

    Abstract translation: 通过尿素热裂解从尿素催化制备三聚氰胺，并在催化剂存在下将产生的裂化气转化为三聚氰胺。 热分解在流化床中进行，所需的热量由位于流化床中的热交换器施加。 裂化气体转化为三聚氰胺在同一流化床中进行，在这种情况下，流化固体由常规催化剂组成，或在远离所述流化床的反应区中。 在后一种情况下，固体流化由催化非活性颗粒组成，转化是在催化剂存在下在远离流化床的所述反应区中进行的。 在这两种情况下，尿素在热交换器上方的一点加入流化床。

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