PROCESS FOR TREATING IRON-CONTAINING WASTE STREAMS
    4.
    发明申请
    PROCESS FOR TREATING IRON-CONTAINING WASTE STREAMS 审中-公开
    处理含铁废物流的方法

    公开(公告)号:WO2008057670A2

    公开(公告)日:2008-05-15

    申请号:PCT/US2007/079530

    申请日:2007-09-26

    IPC分类号: C22B23/00

    摘要: The invention is a process for treating an iron-containing waste stream. The process comprises dividing the waste steam into a first and a second stream, then adding a neutralization agent (e.g., calcium hydroxide) to the first stream to form a partially neutralized slurry, and combining this partially neutralized first stream with the second stream to form a combined stream. The combined stream comprises ferrous chloride and metal hydroxide precipitates, which are separated.

    摘要翻译: 本发明是一种处理含铁废物流的方法。 该方法包括将废蒸汽分成第一和第二物流,然后向第一物流中加入中和剂(例如氢氧化钙)以形成部分中和的淤浆,并将该部分中和的第一物流与第二物流组合形成 一个组合的流。 合并的流包含氯化亚铁和金属氢氧化物沉淀物,其分离。

    IMPROVED METHOD FOR MANUFACTURING HIGH OPACITY, DURABLE PIGMENT
    7.
    发明申请
    IMPROVED METHOD FOR MANUFACTURING HIGH OPACITY, DURABLE PIGMENT 审中-公开
    用于制造高透光度,耐久性的改进方法

    公开(公告)号:WO2002068544A1

    公开(公告)日:2002-09-06

    申请号:PCT/US2002/004403

    申请日:2002-02-14

    IPC分类号: C09C1/36

    摘要: The present invention relates to an improved titanium dioxide pigment that incorporate a dense silica coating and its process for manufacture. The pigment is preferably produced from a titania base from the chloride process in which the manufacturing process comprises the following steps in the order stated: (a) partial or substantial removal of salt from the oxidizer discharge; (b) addition of a dispersant; (c) milling to produce a highly dispersed, highly deagglomerated slurry, followed by dense silica surface treatment. Pigments prepared using the inventive process exhibit optics equivalent to high gloss, high opacity pigments and maintain the durability of the more conventional dense silica treated pigments.

    摘要翻译: 本发明涉及掺入致密二氧化硅涂层的改进的二氧化钛颜料及其制造方法。 颜料优选由氯化法制备二氧化钛碱,其中制备方法按照以下顺序包括以下步骤:(a)部分或基本上从氧化剂排出物中除去盐; (b)加入分散剂; (c)研磨以产生高度分散,高度解聚的浆料,然后进行致密的二氧化硅表面处理。 使用本发明方法制备的颜料显示相当于高光泽,高不透明度颜料的光学材料,并保持更常规的致密二氧化硅处理的颜料的耐久性。