METHOD FOR CONTINUOUSLY PREPARING NANO ZINC OXIDE WITH MEMBRANE REACTOR
    10.
    发明申请
    METHOD FOR CONTINUOUSLY PREPARING NANO ZINC OXIDE WITH MEMBRANE REACTOR 审中-公开
    用膜反应器连续制备纳米氧化锌的方法

    公开(公告)号:US20170044021A1

    公开(公告)日:2017-02-16

    申请号:US15306491

    申请日:2014-09-12

    Abstract: The present invention relaters to a method for continuously preparing a nano zinc oxide with a membrane reactor. A zinc salt solution and a precipitator solution required for the preparation of a zinc oxide are respectively used as dispersion phases, and under the action of a certain pressure, the two reaction solutions respectively penetrate through a membrane tube at a certain rate and disperse quickly under the action of a shear force and react, producing a precursor precipitate. A precursor suspension penetrates through the membrane tube continuously and circularly after being pressurized by a pump, and at the same time, deionized water as a washing fluid is added to a suspension storage tank, wherein impurity ions penetrate through membrane pores and are discharged along with the liquid medium; after the concentration of the impurity ions meets requirements, the concentrated solution is discharged continuously and then spray-dried to obtain a basic zinc carbonate precursor powder. The basic zinc carbonate powder is calcined under certain conditions to obtain the nanostructured zinc oxide powder. The continuous preparation and washing of a powder can be achieved by coupling a membrane washing technique with a membrane dispersion technique. The procedure is simple, the structure of zinc oxide is easy to control and the yield is high.

    Abstract translation: 本发明涉及一种用膜反应器连续制备纳米氧化锌的方法。 分别使用锌盐溶液和制备氧化锌所需的沉淀剂溶液作为分散相,并且在一定压力的作用下,两种反应溶液分别以一定速率穿过膜管并快速分散在 剪切力的作用并反应,产生前体沉淀。 前驱体悬浮液在被泵加压之后,连续循环地穿过膜管,同时将去离子水作为洗涤液加入到悬浮储罐中,其中杂质离子穿过膜孔并与 液体介质; 杂质离子浓度满足要求后,浓缩溶液连续排出,然后喷雾干燥,得到碱式碳酸锌前体粉末。 碱性碳酸锌粉末在一定条件下煅烧得到纳米结构氧化锌粉末。 通过将膜洗涤技术与膜分散技术结合可以实现粉末的连续制备和洗涤。 操作简单,氧化锌结构易于控制,产量高。

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