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    Method of making particles from an aqueous sol
    72.
    发明授权
    Method of making particles from an aqueous sol 失效
    从水溶胶制造颗粒的方法

    公开(公告)号：US3748274A

    公开(公告)日：1973-07-24

    申请号：US3748274D

    申请日：1969-08-29

    Applicant: ATOMIC ENERGY COMMISSION

    Inventor： RANKIN G ,  HOOKER J

    IPC: B01J2/08 ,  B01J13/00 ,  G21C3/62 ,  C09K3/08

    CPC classification number: B01J2/08

    Abstract: A PROCESS FOR PREPARING GEL PARTICLES FROM AN AQUEOUS SOL BY FORMING THE SOL INTO DROPLETS IN A LIQUID SYSTEM WHEREIN THE LIQUID PHASE CONTAINS A LIQUID ORGANIC SOLVENT AND A BARRIER AGENT. THE BARRIER AGENT PREVENTS DEHYDRATION FROM OCCURRING TOO RAPIDLY AND PERMITS SURFACE TENSION EFFECTS TO FORM SOL DROPLETS INTO THE DESIRED SPHEROIDAL SHAPE. A PREFERRED BARRIER AGENT IS MINERAL OIL.

    Apparatus for producing microspheres
    73.
    发明授权
    Apparatus for producing microspheres 失效
    用于生产微球的装置

    公开(公告)号：US3729278A

    公开(公告)日：1973-04-24

    申请号：US3729278D

    申请日：1970-12-17

    Applicant: MC DONNELL DOUGLAS CORP

    Inventor： LYSHER W

    IPC: B01J2/08 ,  B01J2/18 ,  B22D23/08

    CPC classification number: B01J2/18 ,  B01J2/08

    Abstract: Apparatus for producing microspheres including a vertically mounted sol-gel feed tube having a lower microsphere formation needle immersed in an alcohol drying column, variable pump means for feeding sol-gel at a predetermined rate into the upper end of the feed tube, and drive means for vibrating the feed tube in a generally horizontal direction at a predetermined amplitude and frequency to produce microspheres from the formation needle of a uniform and predetermined size. An electromagnetic transducer drive for vibrating the feed tube is used in one illustrative embodiment of the invention, and an electric motor offset drive is used in another illustrative embodiment thereof. A feed tube having multiple microsphere formation needles at its lower end can be used for producing microspheres in quantity.

    Abstract translation: 用于生产微球的装置，包括垂直安装的溶胶 - 凝胶进料管，其具有浸没在醇干燥塔中的下微球形成针，用于以预定速率将溶胶凝胶进料到进料管的上端的可变泵装置，以及驱动装置 用于以大致水平的方向以预定的振幅和频率振动进料管，以从均匀和预定尺寸的地层针产生微球。 在本发明的一个说明性实施例中使用用于振动进料管的电磁换能器驱动器，并且在其另一说明性实施例中使用电动机偏移驱动器。 在其下端具有多个微球形成针的进料管可用于生产微球。

    Precipitation processes for metal-containing materials
    75.
    发明授权
    Precipitation processes for metal-containing materials 失效
    含金属材料的沉淀工艺

    公开(公告)号：US3716605A

    公开(公告)日：1973-02-13

    申请号：US3716605D

    申请日：1970-01-26

    Applicant: ATOMIC ENERGY AUTHORITY UK

    Inventor： GRIMES J ,  DRESS W

    IPC: C01G43/00 ,  B01J2/02 ,  B01J2/04 ,  B01J2/08 ,  C01F7/34 ,  C01F15/00 ,  C01G51/04 ,  B01J13/00 ,  C01G57/00 ,  G21C21/00

    CPC classification number: B01J2/02 ,  B01J2/04 ,  B01J2/08

    Abstract: To a solution of a soluble salt of the relevant material or metals, e.g., iron, thorium, uranium, or aluminum, is added a polymeric organic compound, eg a polysaccharide such as dextran or carob gum, which renders the solution viscous and forms a complex with the metallic ions. The viscous solution is formed into a suitable physical configuration, eg drops, and contacted with a gaseous reagent to precipitate the metal or metals as insoluble compounds, eg iron can be precipitated by contacting with ammonia gas. The gaseous reagent employed moves relative to the viscous solution in said form of a suitable physical configuration. The organic compound may be driven off by heating and the precipitate reduced to metal if desired.

    Abstract translation: 向相关材料或金属的可溶性盐（例如铁，钍，铀或铝）的溶液中加入聚合有机化合物，例如多糖如葡聚糖或角豆胶，其使溶液粘稠并形成 与金属离子复合。 将粘稠溶液形成适当的物理构型，例如滴剂，并与气态试剂接触以将金属或金属沉淀为不溶性化合物，例如铁可通过与氨气接触而沉淀。 所使用的气态试剂以合适的物理构型的形式相对于粘性溶液移动。 可以通过加热驱除有机化合物，如果需要，沉淀物还原成金属。

    Low density alumina spheres of improved strength at high temperature
    76.
    发明授权
    Low density alumina spheres of improved strength at high temperature 失效
    低密度氧化铝球体在高温下的改进强度

    公开(公告)号：US3714071A

    公开(公告)日：1973-01-30

    申请号：US3714071D

    申请日：1970-03-18

    Applicant: UNIVERSAL OIL PROD CO

    Inventor： MICHALKO E

    IPC: B01D53/86 ,  B01J2/08 ,  B01J23/10 ,  B01J35/08 ,  B01J11/32 ,  B01J11/44

    CPC classification number: B01J35/08 ,  B01D53/86 ,  B01J2/08 ,  B01J23/10

    Abstract: Low density alumina spheres of improved strength at high temperature are prepared by commingling an acidic alumina sol and an aqueous rare earth metal salt solution with an ammonia precursor at below gelation temperature and dispersing the mixture as droplets in a hot oil bath. The hydrogel spheres which form are aged, washed and dried, and calcined. Low density alumina spheres are useful as a catalyst or as a catalyst support, particularly in the conversion of hot exhaust gases from an internal combustion engine.

    Abstract translation: 通过在低于凝胶化温度下将氨前体与酸性氧化铝溶胶和稀土金属盐水溶液混合，并将该混合物作为液滴分散在热油浴中来制备在高温下改进强度的低密度氧化铝球。 将形成的水凝胶球体进行老化，洗涤和干燥，并煅烧。 低密度氧化铝球体可用作催化剂或催化剂载体，特别是在内燃机的热废气转化中。

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