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1.发明授权
公开(公告)号：US5000785A
公开(公告)日：1991-03-19
申请号：US325591
申请日：1989-03-20
申请人： David J. Port , Joseph E. Ritsko
发明人： David J. Port , Joseph E. Ritsko
摘要： A method is disclosed for controlling the level of oxygen in molybdenum metal powder, which comprises agglomerating and sintering the molybdenum powder, classifying the resulting agglomerated and sintered molybdenum powder to obtain a particle size of from about -200 to about +325 mesh, contacting the resulting classified powder with a sufficient amount of an aqueous solution of hydrogen peroxide containing from about 1% to about 10% by weight of hydrogen peroxide to yield a molar ratio of H.sub.2 O.sub.2 :Mo of from about 2 to about 5 for sufficient time to achieve an oxygen content in the powder of from about 1% to about 15% by weight wherein the major portion of the oxygen is on the surface of the agglomerates, and removing the resulting hydrogen peroxide-treated molybdenum powder agglomerates from the resulting solution.
摘要翻译： 公开了一种用于控制钼金属粉末中的氧含量的方法，该方法包括使钼粉末凝聚并烧结，对得到的聚集和烧结的钼粉进行分级以获得约-200至约+325目的粒度， 得到具有足量的含有约1％至约10％重量的过氧化氢的过氧化氢水溶液的分级粉末，以产生约2至约5的H 2 O 2 :M摩尔比达足够的时间以达到 粉末中的氧含量为约1重量％至约15重量％，其中氧的主要部分在附聚物的表面上，并从所得溶液中除去得到的过氧化氢处理的钼粉末附聚物。
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公开(公告)号：US4913731A
公开(公告)日：1990-04-03
申请号：US252411
申请日：1988-10-03
CPC分类号： C22C1/045 , B22F1/0096 , B22F2999/00
摘要： A process for forming particulate tungsten alloys from the individual metal sources comprises forming an aqueous solution containing the individual metals for producing tungsten heavy alloys, producing a solid particulate material from the solution and injecting the particle material into a high temperature zone and retaining such material in the high temperature zone for a time sufficient to at least partially melt the metals that are alloying with tungsten while maintaining the temperature of those metals below the boiling point of the lowest boiling metal in the second component. The prealloyed composite powder contains tungsten grains below about 5 micrometers as a discontinuous phase and has a continuous phase of the tungsten and a second component selected from nickel, iron, copper and mixtures thereof.
摘要翻译： 从各个金属源形成颗粒状钨合金的方法包括形成含有用于生产钨重合金的各种金属的水溶液，从溶液中生产固体颗粒材料，并将颗粒材料注入高温区并将这些材料保持在 高温区域足以至少部分地熔化与钨合金化的金属，同时将这些金属的温度保持在第二组分中最低沸点金属的沸点以下的时间。 预合金化复合粉末包含低于约5微米的钨晶粒作为不连续相，并且具有钨的连续相和选自镍，铁，铜及其混合物的第二组分。
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公开(公告)号：US4900587A
公开(公告)日：1990-02-13
申请号：US292714
申请日：1989-01-03
CPC分类号： C23C24/00 , B22F1/02 , C23C18/1216 , C23C18/1241 , C23C18/1275
摘要： A method is disclosed for producing aluminum oxide coated iron-aluminum alloy powder which comprises contacting iron-aluminum alloy powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron-aluminum alloy powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron-aluminum alloy powder with a coating of hydrolyzed aluminum oxide, and firing the iron-aluminum alloy powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron-aluminum alloy powder with a coating of aluminum oxide.
摘要翻译： 公开了一种用于生产氧化铝涂覆的铁 - 铝合金粉末的方法，其包括使细粒径的铁 - 铝合金粉末与液体铝化合物接触，其中铝可水解并将化合物和铁 - 铝合金粉末加入到 形成浆料，从浆料中基本上除去所有的液体，以生产具有水解氧化铝涂层的铁铝合金粉末，并在非氧化性气氛中用水解的氧化铝涂层焙烧铁铝合金粉末以产生 铁铝合金粉末，涂有氧化铝。
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4.发明授权Process for producing finely divided spherical metal powders containing an iron group metal and a readily oxidizable metal 失效用于生产包含铁族金属和容易氧化的金属的精细分散的球形金属粉末的方法
公开(公告)号：US4802915A
公开(公告)日：1989-02-07
申请号：US185713
申请日：1988-04-25
CPC分类号： C22C33/0207 , B22F1/0048
摘要： Alloys of a first group of metals containing at least one iron group metal and one or more easily oxidizable metals can be formed by forming an aqueous solution of the first group of metals, forming solids containing the metals from the solution, reducing the solids to a metallic powder, converting the metallic powder to metallic alloy spherical powders, agglomeration the spherical powder with one or more easily oxidizable metals in a non-oxidizing atmosphere, thereafter the agglomerates are subjected to a sufficient temperatures under non-oxidizing conditions to form an alloy. Alternatively, the easily oxidizable metals can be agglomerated with the solids containing the iron group metal prior to converting the agglomerates to a spherical alloy powder.
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5.发明授权Hydrometallurgical process for producing finely divided spherical low melting temperature metal based powders 失效用于生产精细分散的球形低熔点金属基粉末的湿法冶金方法
公开(公告)号：US4723993A
公开(公告)日：1988-02-09
申请号：US28824
申请日：1987-03-23
CPC分类号： B22F1/0048 , C22C1/04 , Y10S75/953
摘要： A process for producing finely divided spherical metal low melting temperatures powders comprises forming an aqueous solution metals, forming a reducible solid material from the solution, reducing the solid to metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the metal powder particles and to form droplets and cooling the droplets to form essentially spherical metal particles.
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公开(公告)号：US4578251A
公开(公告)日：1986-03-25
申请号：US718244
申请日：1985-04-01
申请人： Joseph E. Ritsko , Howard L. Acla
发明人： Joseph E. Ritsko , Howard L. Acla
CPC分类号： C01G37/02 , C01G51/085
摘要： A process is disclosed for removing chromium from cobalt. The process involves first contacting an acidic cobalt chloride solution with an oxidizing agent, followed by adjusting the pH to from about 3.2 to about 5.5 with a base at a sufficient temperature to form a first solid containing essentially all of the chromium and a portion of the cobalt and a first liquor containing the balance of the cobalt, and then separating the first solid from the first liquor. The first solid is then heated at a sufficient temperature to remove essentially all of the water and form a second solid which is contacted with sufficient water and ammonium hydroxide to form a slurry which is at a pH of greater than about 3.8. The slurry is made up essentially of a second liquor which contains essentially all of the cobalt which was present in the second solid and a third solid which contains essentially all of the chromium which was initially present in the acidic cobalt chloride solution and which is then separated from the second liquor.
摘要翻译： 公开了从钴中除去铬的方法。 该方法包括首先使酸性氯化钴溶液与氧化剂接触，然后用足够温度的碱将pH调节至约3.2至约5.5，以形成基本上含有所有铬的部分和 钴和含有余量钴的第一液体，然后将第一固体与第一液体分离。 然后将第一固体在足够的温度下加热以除去基本上所有的水，并形成第二固体，其与足够的水和氢氧化铵接触以形成pH大于约3.8的浆料。 浆料基本上由第二液体组成，其含有基本上存在于第二固体中的所有钴，第三固体含有基本上所有的最初存在于酸性氯化钴溶液中的铬，然后将其分离 从第二酒。
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公开(公告)号：US4537750A
公开(公告)日：1985-08-27
申请号：US584848
申请日：1984-02-29
申请人： Joseph E. Ritsko , Howard L. Acla
发明人： Joseph E. Ritsko , Howard L. Acla
IPC分类号： C01G35/00
CPC分类号： C01G35/00
摘要： A process is disclosed for producing high purity tantalum oxide from impure tantalum oxide. The starting tantalum oxide is dissolved in a hydrofluoric acid solution and insolubles are removed. The hydrofluoric acid solution containing the tantalum values is adjusted to a pH of from about 6.0 to about 8.0 with a base to precipitate tantalum which is separated from the mother liquor. The tantalum precipitate is then dissolved in an oxalic acid solution, the pH adjusted to from about 5.1 to about 5.5, and the resulting solution digested to precipitate a high purity tantalum compound which is separated. The high purity tantalum compound is then digested in hydrochloric acid to dissolve the compound and then precipitate pure optical grade tantalum oxide which is then separated from its mother liquor.
摘要翻译： 公开了一种从不纯的氧化钽制造高纯度氧化钽的方法。 将起始的氧化钽溶于氢氟酸溶液中，除去不溶物。 将含有钽值的氢氟酸溶液用碱调节至约6.0至约8.0的pH，以沉淀与母液分离的钽。 然后将钽沉淀物溶解在草酸溶液中，将pH调节至约5.1至约5.5，并将所得溶液消化以沉淀分离的高纯度钽化合物。 然后将高纯度的钽化合物在盐酸中消化以溶解该化合物，然后沉淀出纯的光学级氧化钽，然后从其母液中分离。
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公开(公告)号：US4490340A
公开(公告)日：1984-12-25
申请号：US584850
申请日：1984-02-29
申请人： Joseph E. Ritsko , Howard L. Acla
发明人： Joseph E. Ritsko , Howard L. Acla
IPC分类号： C01G35/00
CPC分类号： C01G35/00
摘要： A process is disclosed for producing a high purity tantalum precipitate from an impure source by dissolving in a first hydrofluoric acid solution and digested to form a first precipitate of tantalum which dissolved in hydrochloric acid. The resulting solution is heated to form a second precipitate of tantalum which is dissolved in another hydrofluoric acid solution and digested to form a third precipitate of tantalum. The third precipitate of tantalum is then dissolved in an oxalic acid solution with the pH being adjusted to form another tantalum precipitate which is converted to tantalum oxide.
摘要翻译： 公开了一种通过溶解在第一氢氟酸溶液中并从而将其从不纯的源产生高纯度钽沉淀物并消化以形成溶解在盐酸中的钽的第一沉淀物的方法。 将所得溶液加热形成钽的第二沉淀物，将其溶解在另一种氢氟酸溶液中并消化以形成第三个钽沉淀物。 然后将第三个钽沉淀物溶解在草酸溶液中，调节pH以形成另一个转化为氧化钽的钽沉淀物。
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9.发明授权Hydrometallurical process for producing finely divided spherical refractory metal based powders 失效用于生产精细分散的球状难熔金属基粉末的湿法冶金方法
公开(公告)号：US4731111A
公开(公告)日：1988-03-15
申请号：US26312
申请日：1987-03-16
CPC分类号： B22F1/0048
摘要： A process for producing finely divided spherical refractory metal based powders comprises forming an aqueous solution containing at least one refractory metal, forming a solid reducible refractory metal based material containing a compound selected from the group consisting of refractory metal salts, refractory metal oxides, hydroxides and mixtures thereof, reducing the solid material to refractory metal based powder particles, subjecting the refractory based metal particles to a high temperature zone to melt a portion of the particles and cooling the molten material to form essentially spherical refractory metal based powder particles.
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公开(公告)号：US4495158A
公开(公告)日：1985-01-22
申请号：US584846
申请日：1984-02-29
申请人： Joseph E. Ritsko , Howard L. Acla
发明人： Joseph E. Ritsko , Howard L. Acla
摘要： Tantalum is recovered from an impure source containing niobium, tungsten, titanium, iron, and other impurities by a process comprising mixing the impure source with an alkali metal carbonate, drying the resulting mixture, heating the dried mixture to convert the tungsten to a soluble form, leaching to solubilize the tungsten, digesting the resulting leached solids containing tantalum in hydrochloric acid to solubilize iron values and a portion of the titanium values, dissolving the leached solids containing tantalum values in hydrofluoric acid, adjusting the pH of the resulting solution to form a first tantalum precipitate, dissolving the first tantalum precipitate in oxalic acid adjusting the pH to form a second tantalum precipitate, dissolving and digesting the second tantalum precipitate in hydrochloric acid solution to form a third tantalum precipitate of high purity.
摘要翻译： 通过包括将不纯的源与碱金属碳酸盐混合的方法从包含铌，钨，钛，铁和其他杂质的不纯物质源中回收钽，干燥所得混合物，加热干燥的混合物以将钨转化为可溶形式 浸出以溶解钨，在盐酸中消化含有钽的所得浸出固体，以溶解铁值和一部分钛值，将含有钽值的浸出固体溶解在氢氟酸中，调节所得溶液的pH以形成 第一钽沉淀物，将第一钽沉淀物溶解在草酸中调节pH以形成第二钽沉淀物，溶解并消化第二钽沉淀物在盐酸溶液中以形成高纯度的第三钽沉淀物。
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