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公开(公告)号：US4963336A
公开(公告)日：1990-10-16
申请号：US412062
申请日：1989-09-25
申请人： Leo W. Beckstead , Tom C. Kearns , Eddie C. Chou
发明人： Leo W. Beckstead , Tom C. Kearns , Eddie C. Chou
IPC分类号： C01G41/00
CPC分类号： C01G41/00
摘要： Directed to a process for producing a tungsten product of enhanced purity from ammonium paratungstate (APT) with a minimum number of processing steps which comprises mixing the APT with an ammonium solution, autoclaving the mixture at a temperature above the boiling point thereof to dissolve the APT and recrystallizing APT from the solution to yield an APT product of enhanced marketability.
摘要翻译： 针对从仲氨酸铵（APT）生产具有增强纯度的钨产品的方法，其中最少数量的加工步骤包括将APT与铵溶液混合，将该混合物在高于其沸点的温度下高压灭菌以溶解APT 并从溶液中重结晶APT产生增强的市场性的APT产品。
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公开(公告)号：US4810303A
公开(公告)日：1989-03-07
申请号：US101456
申请日：1987-09-28
申请人： Guy W. Lussiez , Eddie C. Chou , Leo W. Beckstead
发明人： Guy W. Lussiez , Eddie C. Chou , Leo W. Beckstead
CPC分类号： C09C1/10 , C01G11/02 , C01P2006/60 , C01P2006/80
摘要： Hexagonal cadmium sulfide, a bright yellow pigment useful in high temperature processing, is produced by reacting cadmium sulfate solution with a solution of a soluble sulfide under pressure and at a temperature of about 250.degree. C.
摘要翻译： 通过使硫酸镉溶液与可溶性硫化物溶液在压力下和约250℃的温度下反应来制备六角硫化镉，一种用于高温处理的亮黄色颜料。
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3.发明授权
公开(公告)号：US4900522A
公开(公告)日：1990-02-13
申请号：US888310
申请日：1986-07-22
申请人： Eddie C. Chou , Leo W. Beckstead
发明人： Eddie C. Chou , Leo W. Beckstead
CPC分类号： C22B3/0067 , C01G51/003 , C01G53/003 , C22B3/0017 , C22B3/0066 , C22B3/0068 , C22B3/0095 , Y02P10/234 , Y10S423/14
摘要： Sulfate solutions containing nickel and cobalt ions are treated by solvent extraction to provide a nickel raffinate with a high Ni:Co ratio and a cobalt raffinate with a high Co:Ni ratio and with low recycle of cobalt by treating the solution with a cobalt extractant to provide a nickel raffinate of high Ni:Co ratio and a loaded extractant, acid stripping the loaded extractant to provide a cobalt sulfate solution containing some nickel and a regenerated cobalt extractant, treating the cobalt sulfate solution with a nickel extractant to provide a cobalt raffinate with a high Co:Ni ratio and acid stripping the loaded nickel extractant to regenerate the extractant and to provide a recyclable sulfate solution containing only a small proportion of the original cobalt.
摘要翻译： 通过溶剂萃取处理含有镍和钴离子的硫酸盐溶液，通过用钴萃取剂处理溶液来提供具有高Ni:Co比的镍萃余液和Co:Ni比高的钴萃余液和钴的低循环 提供高Ni:Co比的镍提余液和负载的萃取剂，酸性汽提负载的萃取剂以提供含有一些镍的钴硫酸盐溶液和再生的钴萃取剂，用镍萃取剂处理硫酸钴溶液以提供钴萃余液， 较高的Co:Ni比和酸性汽提负载的镍萃取剂以再生萃取剂，并提供仅含少量原始钴的可再循环硫酸盐溶液。
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公开(公告)号：US4761177A
公开(公告)日：1988-08-02
申请号：US66437
申请日：1987-06-26
CPC分类号： B22F9/26 , C22B23/0461
摘要： Fine cobalt or nickel powder is produced by hydrogen reduction of a sulfate solution in the presence of a base and a strong reductant such as a metal borohydride wherein the base is added stagewise to the solution with the initial addition of base being sufficient to insure an essentially neutral pH at the time of reductant addition.
摘要翻译： 在碱和强还原剂例如金属硼氢化物的存在下，通过硫酸盐溶液的氢还原来制备细钴或镍粉，其中碱与阶段性地加入到溶液中，初始添加碱足以保证基本上 还原剂添加时的中性pH值。
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公开(公告)号：US4325919A
公开(公告)日：1982-04-20
申请号：US225910
申请日：1981-01-19
CPC分类号： C01G41/00 , C22B34/36 , Y10S423/05
摘要： A continuous process with feedback control is disclosed for the soda ash digestion of tungsten concentrates in which a slurry of the concentrate in an aqueous sodium carbonate solution is digested in an autoclave at a temperature of at least about 180.degree. C. to provide a pregnant solution of WO.sub.3. High dissolution efficiency is maintained during digestion by continuously monitoring the pregnant solution which includes determining the specific gravity and the Na.sub.2 CO.sub.3 concentration of the pregnant liquor from which feedback signals are produced which are used to control the amount of Na.sub.2 CO.sub.3 and H.sub.2 O fed to the slurry in accordance with the digestion conditions predetermined to provide the desired dissolution efficiency.
摘要翻译： 公开了一种具有反馈控制的连续方法，用于苏打灰消除钨精矿，其中浓缩物在碳酸钠水溶液中的浆液在高压釜中在至少约180℃的温度下消化以提供怀孕溶液 的WO3。 在消化期间通过连续监测怀孕溶液来维持高溶解效率，其包括确定产生反馈信号的怀孕液体的比重和Na 2 CO 3浓度，其用于控制按照下列方式供给到浆料中的Na 2 CO 3和H 2 O的量 预定消化条件以提供所需的溶解效率。
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公开(公告)号：US4320096A
公开(公告)日：1982-03-16
申请号：US225905
申请日：1981-01-19
摘要： A process for the soda digestion of mixed wolframite and scheelite concentrates is provided, the process comprising forming a slurry of the mixed wolframite and scheelite concentrates in an aqueous sodium carbonate solution and then digesting the slurry in an autoclave at a temperature of at least about 180.degree. C. During digestion a predetermined amount of sodium hydroxide is added calculated stoichiometrically to react with NaHCO.sub.3 formed as a result of the hydrolysis of FeCO.sub.3 or FeCO.sub.3 and MnCO.sub.3 produced during the digestion of the wolframite and convert it to Na.sub.2 CO.sub.3. The concentration of the Na.sub.2 CO.sub.3 solution is substantially inversely correlated to the digestion temperature and substantially directly correlated to the Na.sub.2 CO.sub.3 /WO.sub.3 weight ratio ranging from about 0.9 to 2 such as to effect dissolution of at least about 95% of the WO.sub.3 in the concentrate and provide a pregnant liquor containing said WO.sub.3.
摘要翻译： 提供了一种用于混合的白钨矿和白钨矿浓缩物的苏打水消解的方法，该方法包括将混合的黑钨矿和白钨矿精矿的浆料形成在碳酸钠水溶液中，然后在高压釜中在至少约180℃的温度下消化浆料 在消化期间，按化学计量计算加入预定量的氢氧化钠，与作为在硫酸镁消化过程中产生的FeCO 3或FeCO 3和MnCO 3的水解产生的NaHCO 3反应并将其转化为Na 2 CO 3反应。 Na 2 CO 3溶液的浓度与消化温度基本上成反比，并且与Na 2 CO 3 / WO 3重量比基本上直接相关，其范围为约0.9至2，例如至少约95％的WO 3在浓缩物中的溶解，并提供 含有WO3的怀孕液体。
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公开(公告)号：US4917726A
公开(公告)日：1990-04-17
申请号：US263966
申请日：1988-10-26
IPC分类号： C22B34/32
CPC分类号： C22B34/32 , Y10S75/959
摘要： Waste materials containing chromium, such as the sludge resulting from neutralization of chromic acid bleed streams from metal cleaning and plating operations, are (1) rendered innocuous for land fill purposes by heating to temperatures of at least about 700.degree. C. to stabilize the materials for safe disposal and (2) activated by heating to temperatures of about 400.degree. to 500.degree. and the chromium content in the resulting calcine can be recovered by thermite reduction.
摘要翻译： （1）通过加热到至少约700℃的温度对土地填埋目的进行无害化处理，使含有铬的废料（例如中和铬酸流出物所产生的污泥）为稳定材料 用于安全处理和（2）通过加热至约400〜500℃的温度而活化，并且所得到的煅烧物中的铬含量可以通过铝酸盐还原来回收。
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公开(公告)号：US4551314A
公开(公告)日：1985-11-05
申请号：US599127
申请日：1984-04-11
CPC分类号： C22B3/001 , B01D11/0457 , C01G41/003 , Y02P10/234
摘要： A solvent extraction process is provided for transferring metal values from one immiscible liquid phase to another, whereby the two liquid phases are vigorously mixed together in a first mixer under conditions in which one liquid phase is rendered continuous, the mixing being continued to effect complete transfer of metal values, and the mixture then passed to a second mixer and the two phases mixed under conditions in which the other phase is rendered continuous, whereby when the two phases are fed to a settler, the rate of disengagement of the two immiscible liquids is substantially increased.
摘要翻译： 提供了一种溶剂萃取方法，用于将金属值从一个不混溶的液相转移至另一液相，由此两个液相在一个液相连续的条件下在第一混合器中剧烈混合在一起，混合继续进行完全转移 的金属值，然后将混合物送至第二混合器，两相混合，在另一相连续的条件下，当两相进料至沉降器时，两种不混溶液体的脱离速率为 大大增加。
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9.发明授权
公开(公告)号：US4504448A
公开(公告)日：1985-03-12
申请号：US583904
申请日：1984-02-27
CPC分类号： C22B34/36 , B03D1/08 , C22B3/24 , Y02P10/234
摘要： Foaming in the hydrometallurgical treatment of a tungsten-containing aqueous solution due to the presence of carbonaceous organic material impurities, such as flotation reagents, is substantially inhibited by the addition of effective amounts of powdered activated carbon, the carbon with the adsorbed impurities being thereafter separated from the solution by filtering. The activated carbon also protects the solvent extraction circuit from contamination. The method is particularly applicable to slurries of tungsten oxide concentrates during the high temperature, high pressure leaching thereof with sodium carbonate solutions in an autoclave.
摘要翻译： 通过添加有效量的粉末状活性炭，由于存在碳质有机物质杂质（如浮选试剂），在含钨水溶液的湿法冶金处理中发泡，其后吸附的杂质被分离 从解决方案通过过滤。 活性炭还可以保护溶剂萃取回路免受污染。 该方法特别适用于在高压釜中用碳酸钠溶液高温高压浸出的情况下，氧化钨浓缩物的浆料。
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公开(公告)号：US4338287A
公开(公告)日：1982-07-06
申请号：US225912
申请日：1981-01-19
摘要： A process for conditioning a tungsten concentrate containing tungsten as WO.sub.3, sulfur as sulfide, and calcite to fix at least a portion of the sulfur as calcium sulfate by reaction with the calcite, comprises providing a tungsten concentrate having a calcite content such that less than about 15 wt. % calcium sulfate based on the weight of the WO.sub.3 in the concentrate will be formed and heating the concentrate to a temperature of at least about 500.degree. C. in an oxidizing atmosphere to oxidize substantially all the sulfur in the concentrate to provide a conditioned concentrate having a calcium sulfate content less than about 15% based on the weight of the WO.sub.3, whereby the conditioned concentrate can be efficiently leached with alkali metal carbonates or hydroxides and the resulting alkali metal tungstate solution can be effectively treated to recover an ammonium tungstate solution.
摘要翻译： 一种用于将含钨的钨浓缩物作为WO 3，硫作为硫化物和方解石调节以通过与方解石反应固定硫酸钙的至少一部分硫的方法，包括提供具有方解石含量的少于约 15重量％ 将形成基于浓缩物中WO 3的重量的硫酸钙，并在氧化气氛中将浓缩物加热至至少约500℃的温度，以将浓缩物中的所有硫基本上全部氧化，从而提供具有 基于WO 3的重量计，硫酸钙含量小于约15％，由此可以用碱金属碳酸盐或氢氧化物有效地浸出调理的浓缩物，并且可以有效地处理所得的碱金属钨酸盐溶液以回收钨酸铵溶液。
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