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    System for recycling spent sulfuric acid, method for recycling sulfuric acid waste, and recycled sulfuric acid
    19.
    发明申请
    System for recycling spent sulfuric acid, method for recycling sulfuric acid waste, and recycled sulfuric acid 失效
    回收废硫酸系统，回收硫酸废物的方法和循环硫酸

    公开(公告)号：US20040211464A1

    公开(公告)日：2004-10-28

    申请号：US10478311

    申请日：2004-05-17

    发明人： Yasuhito Inagaki

    IPC分类号： G05D011/00

    CPC分类号： G06Q10/06 ,  C01B17/69 ,  C01B17/88 ,  C01B17/901 ,  Y10S423/02 ,  Y10T137/0329 ,  Y10T137/2509

    摘要： The present invention provides a system for recycling spent sulfuric acid, which aims at providing an industrially advantageous system featuring that spent sulfuric acid is effectively utilized at a place other than a discharge source regardless of geographical conditions, and also provides a method for recycling waste sulfuric acid, and recycled sulfuric acid. In the system, when spent sulfuric acid discharged or collected at a discharge source A is transported by a carrier unit B, and used at a user office C, a concentration of the spent sulfuric acid is measured and/or adjusted at least at one of the discharge source A, the carrier unit B, and the user office C. The spent sulfuric acid waste liquid discharged or collected at the discharge source A is reutilized by being mixed with at least one of a hydrogen peroxide solution and water.

    摘要翻译： 本发明提供了一种回收废硫酸的系统，其目的在于提供一种工业上有利的系统，其特征在于废硫酸在排放源以外的地方有效地被利用，而不管地理条件如何，并且还提供了一种回收废硫酸 酸和再循环的硫酸。 在该系统中，当在排出源A排出或收集的废硫酸由载体单元B输送并在用户办公室C使用时，测量废弃硫酸的浓度和/或至少在 排出源A，运送单元B和用户办公室C.排出源A排出或收集的废硫酸废液通过与过氧化氢溶液和水中的至少一种混合而再利用。

    Process for the preparation of titanium dioxide
    20.
    发明授权
    Process for the preparation of titanium dioxide 失效
    二氧化钛的制备方法

    公开(公告)号：US5229087A

    公开(公告)日：1993-07-20

    申请号：US523107

    申请日：1990-05-14

    申请人： Karl-Heinz Schultz ,  Gunter Lailach ,  Rudolf Gerken

    发明人： Karl-Heinz Schultz ,  Gunter Lailach ,  Rudolf Gerken

    IPC分类号： C01B17/90 ,  C01G23/053 ,  C22B34/12

    CPC分类号： C01B17/901 ,  C01G23/0532 ,  C22B34/125 ,  C22B34/1259

    摘要： A process for the preparation of titanium dioxide by the sulphate process in which titanium raw materials are decomposed with sulphuric acid, the resulting titanyl sulphate is hydrolyzed, the waste acid is separated from the hydrolyzate and evaporated to a concentration of 60 to 70%, sulphuric acid is separated from the solid metal sulphates, and the sulphuric acid which has been concentrated by evaporation is used again for the decomposition of the titanium raw material, the improvement wherein the 60 to 70% sulphuric acid is concentrated to 70 to 80% H.sub.2 SO.sub.4 in a further evaporation stage and the concentration of a part of this sulphuric acid is raised to a concentration of 98 to 99% H.sub.2 SO.sub.4 by the absorption of SO.sub.3 and then used together with the remainder of the above-mentioned 70 to 80% sulphuric acid for the decomposition of titanium raw materials.

    摘要翻译： 通过硫酸盐工艺制备二氧化钛的方法，其中钛原料用硫酸分解，得到的硫酸氧钛被水解，废酸与水解产物分离并蒸发至60至70％的浓度，硫酸 酸与固体金属硫酸盐分离，通过蒸发浓缩的硫酸再次用于钛原料的分解，其中将60-70％硫酸浓缩至70-80％H 2 SO 4的改进 进一步蒸发阶段，通过吸收SO 3将该硫酸的一部分浓度提高至98至99％H 2 SO 4的浓度，然后与剩余的上述70-80％硫酸一起用于 分解钛原料。