-
公开(公告)号：US4541868A
公开(公告)日：1985-09-17
申请号：US516235
申请日：1983-07-22
CPC分类号： C01G53/10 , C01G51/10 , C22B23/043
摘要： According to the present invention, improved dissolution of nickel and cobalt and thus improved recovery of those desired metal values is achieved by modifying the ore recovery processes wherein sulfuric acid leaching at elevated temperatures is used to dissolve the nickel and cobalt. In particular, according to the present invention, processes are provided wherein the sulfuric acid and ore are contacted at substantially ambient temperature prior to subsequent heating to attain the elevated temperatures of the sulfuric acid leach. Practice of the present invention has been found to result in improved metal value recovery.
摘要翻译： 根据本发明，通过改进矿石回收方法可以改善镍和钴的溶解度，从而提高所需金属值的回收率，其中使用高温硫酸浸出来溶解镍和钴。 特别地，根据本发明，提供了在继续加热之前硫酸和矿石在大致环境温度下接触以达到硫酸浸出的升高温度的方法。 已经发现本发明的实践导致改善的金属值回收。
-
公开(公告)号：US4548794A
公开(公告)日：1985-10-22
申请号：US516236
申请日：1983-07-22
CPC分类号： C22B23/0469 , C22B23/043 , Y02P10/212
摘要： According to the present invention, processes are provided for recovery of nickel, cobalt and like metal values from laterite ores wherein the ores are separated into high and low magnesium containing fractions, the low magnesium fraction is leached with sulfuric acid at elevated temperatures and pressure to solubilize the metal values. The pregnant liquor resulting from the high pressure which also contains solubilized Fe, Al and acid is then contacted with a low magnesium fraction of the ore in a low pressure leach under conditions such that at least some of the acid is neutralized and substantially all of the solubilized Fe and Al is removed as hematite and alunite precipitate.In one embodiment, the pregnant liquor from the high pressure leach and the high magnesium fraction are contacted at atmospheric pressure and a temperature of about 80.degree. C. prior to low pressure leaching. In other embodiments, various process streams are separated by size and otherwise, and recycled to within the processes.In another embodiment, all leached values, including magnesium and sulfuric acid, are recovered, resulting in a dischargeless process which is environmentally and economically acceptable. Elimination of prior art iron and aluminum contaminants by the low pressure leach provides a simplified method of recovery of all elements in the leachate.
摘要翻译： 根据本发明，提供了从红土矿石中回收镍，钴等金属值的方法，其中矿石被分离成高和低含镁的馏分，低镁馏分在高温和高压下被硫酸浸出 溶解金属值。 然后在高压下产生的含有溶解的Fe，Al和酸的怀孕液体在低压浸出液中与矿石的低镁馏分接触，使得至少一些酸被中和，并且基本上全部 溶解的Fe和Al作为赤铁矿和Alunite析出。 在一个实施方案中，来自高压浸出的怀孕液和高镁级分在低压浸出之前在大气压和约80℃的温度下接触。 在其他实施方案中，各种工艺流通过尺寸和其他方式分开，并被再循环到工艺中。 在另一个实施方案中，回收所有浸出的值，包括镁和硫酸，导致无环境和无经济可接受的方法。 通过低压浸出法消除现有技术的铁和铝污染物提供了回收渗滤液中所有元素的简化方法。
-
公开(公告)号：US4541994A
公开(公告)日：1985-09-17
申请号：US516237
申请日：1983-07-22
CPC分类号： C22B23/043 , Y02P10/212
摘要： According to the present invention, Ni- and Co-rich, low Mg fines may be advantageously separated from the coarse fractions of lateritic ores by atmospheric or low pressure leaching. In particular, the process of the present invention comprises contacting a lateritic ore or ore fraction at temperatures from about 20.degree. C. to about 200.degree. C. and pressures from about atmospheric to about 200 psig with an aqueous acid solution to form a leach liquor, a leach residue and a fines fraction. The fines fraction which can be separated from the residue with the leach liquor by conventional means such as cycloning is found to be richer in Ni and Co and lower than the remainder of the residue.
摘要翻译： 根据本发明，通过大气或低压浸出，可以有利地将镍和富钴低Mg细粒与红土矿石的粗级分离。 特别地，本发明的方法包括使用酸水溶液使红土矿石或矿石馏分在约20℃至约200℃的温度和约大气压至约200psig的压力下接触以形成浸出液 ，浸出残渣和细粉碎部分。 发现通过常规方法例如旋风可以用浸出液与残留物分离的细粒分数在Ni和Co中更富，并且低于其余残余物。
-
公开(公告)号：US20080128359A1
公开(公告)日：2008-06-05
申请号：US11943360
申请日：2007-11-20
申请人： John E. Litz , Charles S. Williams
发明人： John E. Litz , Charles S. Williams
IPC分类号： C02F1/28
CPC分类号： C02F1/281 , C02F1/006 , C02F1/288 , C02F2101/006 , C02F2101/103 , C02F2101/16 , C02F2101/20 , C02F2103/007 , C02F2103/06 , C02F2209/008 , C02F2209/06 , C02F2303/16
摘要： Methods and compositions for removing radium from drinking water using a natural zeolite.
摘要翻译： 使用天然沸石从饮用水中去除镭的方法和组合物。
-
公开(公告)号：US06730279B2
公开(公告)日：2004-05-04
申请号：US09852207
申请日：2001-05-09
申请人： Robert W. Balliett , Wolfgang Kummer , John E. Litz , Lawrence F. McHugh , Harry H. K. Nauta , Paul B. Queneau , Rong-Chien Wu
发明人： Robert W. Balliett , Wolfgang Kummer , John E. Litz , Lawrence F. McHugh , Harry H. K. Nauta , Paul B. Queneau , Rong-Chien Wu
IPC分类号： C01G3900
CPC分类号： C01G39/003 , C01G39/02
摘要： High purity ammonium dimolybdate or molybdenum oxide is produced by the pressure oxidation of low grade molybdenite concentrates or molybdenum intermediates. The process entails nearly complete oxidation of the sulfide minerals while optimizing the process chemistry and autoclave conditions to solubilize as little of the molybdenum values as possible. The autoclave discharge 12 is then subjected to a leaching step, either an alkaline leach 50, 400 or ammonium leach 250 process, before or after a liquid/solid separation step 20, 220, 410. The solution is then subjected to (a) filtration 60, 410, solvent extraction 70, 440, crystallization 90,450, and calcination 120, 480 or (b) filtration 260, 280, crystallization 290, and calcination 320 to produce a product suitable for chemical-grade molybdenum oxide 125, 325, 485.
摘要翻译： 通过低品位辉钼矿浓缩物或钼中间体的压力氧化产生高纯度的二钼酸铵或氧化钼。 该过程需要几乎完全硫化矿物氧化，同时优化工艺化学和高压釜条件以溶解尽可能少的钼值。 然后在液体/固体分离步骤20,220,410之前或之后对高压釜排出口12进行浸出步骤，碱浸液50,400或铵浸出250处理。然后将溶液进行（a）过滤 60,410，溶剂萃取70,440，结晶90,450和煅烧120,480或（b）过滤260,280，结晶290和煅烧320以产生适合于化学级氧化钼125,325,485的产物。
-
公开(公告)号：US4606764A
公开(公告)日：1986-08-19
申请号：US690743
申请日：1985-01-11
CPC分类号： C22B3/44 , C22B15/001 , C22B15/0089 , C22B23/043 , C22B23/0461 , C22B3/08 , Y02P10/234 , Y02P10/236
摘要： The invention comprises the treatment of metal oxides and mixed metal oxides and metal sulfides in a vertical tube reactor system having a downcomer section and a riser section in order to oxidize and dissolve the metal values in aqueous slurry primarily in the downcomer section and introducing a reducing agent comprising a formate species and reducing the dissolved metal values in the riser section. The reduced metal values are then separated with the gangue values from the product solution downstream from the vertical tube reactor system. The reduced metal values may then be separated from the gangue material by conventional solid separation techniques, such as flotation.
摘要翻译： 本发明包括在具有降液管段和提升管部分的垂直管式反应器系统中处理金属氧化物和混合金属氧化物和金属硫化物，以便主要在降液管部分中氧化和溶解含水浆料中的金属值，并引入还原剂 其包含甲酸盐物质并且降低所述提升管部分中的溶解的金属值。 然后将降低的金属值与来自垂直管式反应器系统下游的产物溶液的脉石值分离。 然后通过常规的固体分离技术（例如浮选）将还原的金属值与ang石材料分离。
-
7.发明授权Method for removing cationic contaminants from water using natural zeolite underloaded with transition metal ions to limit leakage of intrinsic arsenic therefrom 有权使用负载有过渡金属离子的天然沸石从水中除去阳离子污染物的方法，以限制其内部砷的泄漏公开(公告)号：US08663479B2
公开(公告)日：2014-03-04
申请号：US11943360
申请日：2007-11-20
申请人： John E. Litz , Charles S. Williams
发明人： John E. Litz , Charles S. Williams
IPC分类号： C02F1/42
CPC分类号： C02F1/281 , C02F1/006 , C02F1/288 , C02F2101/006 , C02F2101/103 , C02F2101/16 , C02F2101/20 , C02F2103/007 , C02F2103/06 , C02F2209/008 , C02F2209/06 , C02F2303/16
摘要： Methods and compositions for removing radium from drinking water using a natural zeolite.
摘要翻译： 使用天然沸石从饮用水中去除镭的方法和组合物。
-
8.发明授权Arsenic removal from aqueous media using chemically treated zeolite materials 有权使用化学处理的沸石材料从水性介质中除去砷公开(公告)号：US07476311B2
公开(公告)日：2009-01-13
申请号：US10255364
申请日：2002-09-25
申请人： John E. Litz , Charles S. Williams
发明人： John E. Litz , Charles S. Williams
IPC分类号： C02F1/42
CPC分类号： B01J20/186 , C02F1/281 , C02F2101/103 , Y10S210/911 , Y10S210/912
摘要： Systems and methods are provided for the removal and disposal of arsenic from an aqueous medium. The systems and methods include the removal of arsenic from a source by contact with either a chemically treated natural or synthetic zeolite, for example a ferric-loaded zeolite. The spent zeolite is disposed of at an appropriate arsenic disposal site. A system for monitoring and maintaining an arsenic removal/disposal system by an off-site provider is also disclosed.
摘要翻译： 提供了从水介质中去除和处理砷的系统和方法。 该系统和方法包括通过与化学处理的天然或合成沸石（例如载有三价铁的沸石）接触从源除去砷。 废弃的沸石被处理在合适的砷处理场所。 还公开了一种由场外提供者监测和维护除砷/处理系统的系统。
-
公开(公告)号：US07108784B1
公开(公告)日：2006-09-19
申请号：US10256854
申请日：2002-09-26
申请人： John E. Litz , Charles S. Williams
发明人： John E. Litz , Charles S. Williams
IPC分类号： C02F9/00
CPC分类号： B01J39/14 , B01J20/165 , B01J20/18 , C02F1/281 , C02F1/42 , C02F2001/425 , C02F2101/16 , C02F2303/16
摘要： Methods and apparatuses are provided for the removal and destruction of ammonia from an aqueous medium. The methods and apparatuses include the removal of ammonia from an aqueous medium by contact with either natural or synthetic zeolite. The spent zeolite is re-generated for continuous use, while the ammonia is concentrated as ammonium sulfate, and ultimately destroyed via combustion. A system for monitoring and maintaining an ammonia removal system by an off-site provider is also disclosed.
摘要翻译： 提供了从水介质中去除和破坏氨的方法和装置。 所述方法和装置包括通过与天然或合成沸石接触从水介质中除去氨。 废弃的沸石被重新产生用于连续使用，而氨被浓缩为硫酸铵，并且最终通过燃烧而被破坏。 还公开了一种用于由场外供应商监测和维护氨除去系统的系统。
-
10.发明授权Hexa-valent chromium removal from aqueous media using ferrous-form zeolite materials 有权使用铁基沸石材料从水性介质中除去六价铬公开(公告)号：US07105087B2
公开(公告)日：2006-09-12
申请号：US10666654
申请日：2003-09-17
申请人： John E. Litz
发明人： John E. Litz
IPC分类号： B01D15/08
CPC分类号： C02F1/281 , C02F1/288 , C02F2101/22 , Y10S210/913
摘要： Systems and methods are provided for the removal and disposal of chromium form an aqueous medium. The systems and methods include the removal of chromium from a source by contact with either natural or synthetic zeolite that has been modified with a ferrous ion or other like substance. The spent zeolite is disposed of and replaced with freshly modified zeolite. In some cases the systems and methods are performed under de-oxidizing conditions.
摘要翻译： 提供了用于除去和处理含铬介质的铬的系统和方法。 该系统和方法包括通过与已经用亚铁离子或其它类似物质改性的天然或合成沸石接触从源中除去铬。 处理废沸石并用新鲜改性的沸石代替。 在一些情况下，系统和方法在脱氧条件下进行。
-
-
-
-
-
-
-
-
-
搜索结果
15 条记录 (耗时 0.028 秒)
