Crystallization process
    3.
    发明授权
    Crystallization process 失效
    结晶过程

    公开(公告)号:US4623372A

    公开(公告)日:1986-11-18

    申请号:US629615

    申请日:1984-07-11

    IPC分类号: B01D9/00

    CPC分类号: B01D9/0022

    摘要: An improved crystallization process is disclosed for separating a crystallizable material and an excluded material which is at least partially excluded from the solid phase of the crystallizable material obtained upon freezing a liquid phase of the materials. The solid phase is more dense than the liquid phase, and it is separated therefrom by relative movement with the formation of a packed bed of solid phase. The packed bed is continuously formed adjacent its lower end and passed from the liquid phase into a countercurrent flow of backwash liquid. The packed bed extends through the level of the backwash liquid to provide a drained bed of solid phase adjacent its upper end which is melted by a condensing vapor.

    摘要翻译: 公开了一种改进的结晶方法,用于分离可结晶材料和排除材料,所述可结晶材料和排除材料至少部分地从冷冻液相的材料中获得的可结晶材料的固相排除。 固相比液相更致密,并通过形成固相填充床的相对运动与其分离。 填充床在其下端附近连续形成,并从液相中流入逆流液体的逆流。 填充床延伸穿过反冲洗液体的水平,以在其上端附近提供固相的排水床,其被冷凝蒸气熔化。

    Sulfur recovery process
    4.
    发明授权
    Sulfur recovery process 失效
    硫回收过程

    公开(公告)号:US5021232A

    公开(公告)日:1991-06-04

    申请号:US415100

    申请日:1989-09-29

    IPC分类号: B01D53/48 B01D53/50 C01B17/04

    摘要: A sulfur recovery process including a Claus reaction wherein sulfur-containing compounds are converted to elemental sulfur in the presence of a stoichiometric excess of hydrogen sulfide. The sulfurous compounds in the tail gas of the Claus reaction are separated for recycle using crystallization. Liquid carbon dioxide absorption is used to separate substantially all sulfur-containing compounds from a residual tail gas suitable for venting to the atmosphere.

    摘要翻译: 包含Claus反应的硫回收方法,其中在化学计量过量的硫化氢存在下,含硫化合物转化为元素硫。 克劳斯反应的尾气中的亚硫酸化合物被分离用于循环使用结晶。 液体二氧化碳吸收用于将基本上所有的含硫化合物与适合于排放到大气中的残余尾气分离。