公开(公告)号：US4447403A

公开(公告)日：1984-05-08

申请号：US72304

申请日：1979-09-04

申请人： Laurence W. Bierman ,  Gary L. Long ,  David Bortner

发明人： Laurence W. Bierman ,  Gary L. Long ,  David Bortner

IPC分类号： C01B25/238 ,  C01G31/00 ,  C01G43/00 ,  C01G49/00 ,  C21B15/00 ,  C22B34/22 ,  C22B60/02

CPC分类号： C22B60/0282 ,  C01B25/238 ,  C01G31/00 ,  C01G43/00 ,  C01G49/00 ,  C21B15/00 ,  C22B34/22

摘要： An improved method and apparatus for effecting a substantial reduction in retention time of oxidation processes by the autoclave oxidation of ion species dissolved in aqueous solutions. In one embodiment, the invention provides for oxidation of dissolved reduced ion species including ferrous iron (Fe.sup.+2), uranium (U.sup.+4) and vanadium (V.sup.+3) from wet process phosphoric acids, or for conditioning of aqueous solutions for other uses, such as corrosion control, by raising the valence state of dissolved ion species. In accordance with the present invention, pure oxygen, present in quantity of at least 94% by volume, is utilized as an oxidizing agent with specified process parameters: temperature, pressure and mixing conditions in an autoclave reaction vessel. In a presently preferred embodiment, the following specified parameters have achieved optimum results with regard to a significant decrease of retention time of the aqueous solution treated in the autoclave vessel: temperature range of from about 120.degree. F. to about 160.degree. F., pressure range of from about 120 psi to about 150 psi and effecting agitation by the use of an impeller located near the interface of the liquid and gas mixture in the vessel to provide a dispersion of the liquid solution in the gaseous phase. In accordance with such embodiment, a reduction of retention time for oxidation of uranium (U.sup.+4 .fwdarw.U.sup.+6) and vandanium (V.sup.+3 .fwdarw.V.sup.+4) metals from wet process phosphoric acid has been found to be less than two minutes, whereas, prior processes for effecting the same oxidation results have taken at least one hour.

摘要翻译： 一种改进的方法和装置，用于通过溶解在水溶液中的离子物质的高压釜氧化来显着降低氧化过程的保留时间。 在一个实施方案中，本发明提供了从湿法磷酸氧化溶解的还原离子物质，包括二价铁（Fe + 2），铀（U + 4）和钒（V + 3），或用于调节其它水溶液 通过提高溶解离子物质的化合价态来应用腐蚀控制。 根据本发明，使用存在量为至少94体积％的纯氧作为氧化剂，其具有指定的工艺参数：高压釜反应容器中的温度，压力和混合条件。 在目前优选的实施方案中，以下指定参数已经获得了在高压釜容器中处理的水溶液的保留时间的显着降低的最佳结果：温度范围为约120°F至约160°F，压力 范围为约120psi至约150psi，并通过使用位于容器中的液体和气体混合物的界面附近的叶轮进行搅拌，以提供液体溶液在气相中的分散体。 根据这种实施方案，已经发现，从湿法磷酸中氧化铀（U + 4-> U + 6）和铀（V + 3→V + 4）金属的保留时间的减少已经被发现小于 两分钟，而用于实现相同氧化结果的现有方法至少需要1小时。