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1. 发明授权

US5164171A Removal of carbonate from caustic sulfide solution 失效
标题翻译：从苛性硫化物溶液中除去碳酸盐
公开(公告)号：US5164171A
公开(公告)日：1992-11-17
申请号：US724416
申请日：1991-07-01
申请人： Michael J. Miller , Martin C. Vogt , Thomas A. Wolfe
发明人： Michael J. Miller , Martin C. Vogt , Thomas A. Wolfe
IPC分类号： C01F11/18 , C01G39/06 , C01G41/00
CPC分类号： C01G39/06 , C01F11/18 , C01G41/00
摘要： In the manufacture of ammonium paratungstate, sulfide is added to a tungsten-containing solution in order to precipitate molybdenum sulfide. Volatiles, including sulfides, evolved during this process are collected in a caustic scrubbing solution. The sulfide values in the caustic scrubbing solution may be reused to precipitate molybdenum sulfide by first treating the caustic scrubbing solution with alkaline earth chloride or sulfate to precipitate out alkaline earth carbonate.
摘要翻译：在制造仲钨酸铵时，为了沉淀硫化钼，将硫化物加入到含钨溶液中。在此过程中演变的挥发物，包括硫化物被收集在苛性洗涤溶液中。苛性碱洗涤溶液中的硫化物值可以重新用于沉淀硫化钼，首先用碱土金属氯化物或硫酸盐处理苛性碱洗涤溶液以沉淀出碱土金属碳酸盐。

2. 发明授权

US4552729A Method for removing tin from sodium tungstate solution 失效
标题翻译：从钨酸钠溶液中除去锡的方法
公开(公告)号：US4552729A
公开(公告)日：1985-11-12
申请号：US679419
申请日：1984-12-07
申请人： Michael J. Miller , Martin C. Vogt , Richard A. Scheithauer
发明人： Michael J. Miller , Martin C. Vogt , Richard A. Scheithauer
IPC分类号： C01G19/02 , C01G41/00
CPC分类号： C01G41/00 , C01G19/02
摘要： A method is disclosed for removing tin from aqueous sodium tungstate solutions. The method involves adding ammonia to the sodium tungstate solution, adjusting the pH to above about 9.5 with an acid, adding magnesium chloride to form insoluble material containing the major portion of the tin, silicon, arsenic and phosphorus and a resulting sodium tungstate solution containing the major portion of the tungsten, and separating the insoluble material from the resulting solution.
摘要翻译：公开了从钨酸钠溶液中除去锡的方法。该方法包括向钨酸钠溶液中加入氨，用酸将pH调节至约9.5以上，加入氯化镁以形成含有主要部分的锡，硅，砷和磷的不溶物质，得到含有钨的主要部分，并从所得溶液中分离不溶物质。

3. 发明授权

US4379126A Process for recovering tungsten values from alkali solutions 失效
标题翻译：从碱溶液中回收钨值的工艺
公开(公告)号：US4379126A
公开(公告)日：1983-04-05
申请号：US292376
申请日：1981-08-13
申请人： Tai K. Kim , Joseph E. Ritsko , Martin B. MacInnis , Martin C. Vogt
发明人： Tai K. Kim , Joseph E. Ritsko , Martin B. MacInnis , Martin C. Vogt
IPC分类号： C01G39/02 , C01G41/00 , C22B3/28
CPC分类号： C22B3/0012 , C01G41/003 , C22B3/24 , Y02P10/234 , Y10S423/14
摘要： In a continuous process for producing ammonium tungstate from aqueous alkali metal tungstate solution according to an extraction process, the loaded organic extractant is cleaned after stripping by contacting with activated carbon for improving phase separation and decreasing the concentration of alkali metal.
摘要翻译：在根据提取方法从碱金属钨酸盐水溶液中生产钨酸铵的连续方法中，通过与活性炭接触来提纯负载的有机萃取剂，以提高相分离和降低碱金属的浓度。

4. 发明授权

US4360503A Recovery of tungsten values from alkali tungstate solutions by solvent extraction 失效
标题翻译：通过溶剂萃取从碱式钨酸盐溶液中回收钨值
公开(公告)号：US4360503A
公开(公告)日：1982-11-23
申请号：US292380
申请日：1981-08-13
申请人： Carl W. Boyer , James N. Christini , Martin C. Vogt
发明人： Carl W. Boyer , James N. Christini , Martin C. Vogt
IPC分类号： C01G41/00 , C22B3/28
CPC分类号： C22B3/0012 , C01G41/00 , C01G41/003 , Y02P10/234
摘要： In a two component extraction system for producing ammonium tungstate from aqueous alkali metal tungstate from aqueous alkali metal tungstate solution, the stripped organic is washed to form a wash solution which is mixed with concentrated ammonia solution to form an aqueous ammonia solution which is mixed with product ammonia tungstate and fed as the stripping solution for contacting the loaded organic extractant.
摘要翻译：在碱金属钨酸盐水溶液中由碱金属钨酸钠水溶液制备钨酸铵的双组分提取系统中，将汽提的有机物洗涤形成洗涤溶液，该溶液与浓氨水混合形成氨水溶液，与产物混合氨基钨酸盐并作为用于与负载的有机萃取剂接触的汽提溶液进料。

5. 发明授权

US4353881A Tungsten recovery from tungsten ore concentrates by caustic digestion 失效
标题翻译：通过苛性碱消解从钨矿精矿中回收钨
公开(公告)号：US4353881A
公开(公告)日：1982-10-12
申请号：US261408
申请日：1981-05-07
申请人： Lucretia R. Quatrini , Martin C. Vogt , Brice E. Martin
发明人： Lucretia R. Quatrini , Martin C. Vogt , Brice E. Martin
IPC分类号： C01G41/00 , C22B34/36
CPC分类号： C01G41/00 , C22B34/36
摘要： Tungsten is recovered from tungsten ore concentrates in the form of sodium tungstate by a basic process in which ground ore is first digested in a sodium hydroxide solution followed by diluting the solution to dissolved sodium tungstate separating the solution from the caustic insoluble sludge and crystallizing soluble sodium tungstate, wherein the present invention permits improved recovery of tungsten from difficult to process ores by the process steps of comminuting said tungsten ore concentrate to a particle size less than about 200 mesh, adding the comminuted ore to an aqueous solution of sodium hydroxide at a temperature from about 10 to about 30 degrees centigrade, dispersing said comminuted ore in the aqueous solution of sodium hydroxide prior to digestion, digesting at a temperature of from about 75.degree. C. to about 150.degree. C. for a sufficient period of time to convert substantially all of the tungsten values to dissolvable sodium tungstate, and diluting the mixture to reduce the sodium hydroxide concentration to between about 4.5 and 5.5 molar at a temperature below about 90.degree. C. to substantially dissolve all of the sodium tungstate.
摘要翻译：钨以钨酸钠的形式从钨矿精矿中回收，其中首先将矿石矿石在氢氧化钠溶液中消化，然后将溶液稀释到溶解的钨酸钠中，将溶液从苛性碱不溶性污泥中分离出来并结晶可溶性钠钨酸盐，其中本发明允许通过将所述钨矿精矿粉碎至小于约200目的粒度的方法步骤，从难以加工的矿石中提高钨的回收率，将粉碎的矿石在温度下加入到氢氧化钠水溶液中在约10至约30摄氏度之间，在消化之前将所述粉碎的矿石分散在氢氧化钠水溶液中，在约75℃至约150℃的温度下消化足够的时间以基本上转化所有的钨值可溶解钨酸钠，并稀释混合物以减少t 在低于约90℃的温度下氢氧化钠浓度在约4.5和5.5摩尔之间，以使所有的钨酸钠基本上溶解。

6. 发明授权

US4448755A Method for removal of tin from ammonium tungstates 失效
标题翻译：从钨酸铵中除去锡的方法
公开(公告)号：US4448755A
公开(公告)日：1984-05-15
申请号：US557021
申请日：1983-12-01
申请人： Richard A. Scheithauer , Michael J. Miller , Martin B. MacInnis , James N. Christini , Martin C. Vogt
发明人： Richard A. Scheithauer , Michael J. Miller , Martin B. MacInnis , James N. Christini , Martin C. Vogt
IPC分类号： C01G19/00 , C01G41/00
CPC分类号： C01G19/00 , C01G41/00
摘要： In a process for producing pure ammonium paratungstate from ammonium tungstate solutions containing tin, sulfide is added to the ammonium tungstate solution in an amount sufficient to form a soluble complex of the sulfide with the tin. The solution is then evaporated to a volume at which essentially all of the tungsten is in the form of insoluble ammonium paratungstate and essentially all of the tin is in the mother liquor in the form of a soluble complex along with other impurities. The solid ammonium paratungstate is then separated from the mother liquor by filtration.
摘要翻译：在从含有锡的钨酸铵溶液中生产纯仲钨酸铵的方法中，将硫化铵以足以形成硫化物与锡的可溶性络合物的量加入到钨酸铵溶液中。然后将溶液蒸发至其中基本上所有的钨都是不对称的仲钨酸铵形式的体积，并且基本上所有的锡在母液中是可溶性络合物的形式以及其它杂质。然后将过硫酸固体铵与母液分离。

7. 发明授权

US5417945A Process for recovering tungsten as an ammoniacal tungstate compound in which ammoniacal tungstate liquors are reclaimed 失效
标题翻译：用于回收钨作为氨基钨酸盐化合物的方法，其中回收了氨基钨酸盐液体
公开(公告)号：US5417945A
公开(公告)日：1995-05-23
申请号：US795310
申请日：1991-11-14
申请人： Richard G. W. Gingerich , James N. Christini , Martin C. Vogt , Clarence D. Vanderpool , Michael J. Miller
发明人： Richard G. W. Gingerich , James N. Christini , Martin C. Vogt , Clarence D. Vanderpool , Michael J. Miller
IPC分类号： C01G41/00
CPC分类号： C01G41/003 , C01G41/00
摘要： A process for recovering tungsten as an ammoniacal tungstate which comprises reacting a tungsten containing material with sodium hydroxide to produce sodium tungstate and forming a first aqueous sodium tungstate solution therefrom, crystallizing sodium tungstate from the first aqueous sodium tungstate solution, dissolving the resulting sodium tungstate crystals in an aqueous medium to form a second aqueous sodium tungstate solution, extracting tungsten from the second aqueous sodium tungstate solution with an organic extracting agent wherein the extracting agent containing tungsten is capable of being stripped of the extracted tungsten by ammonia, and thereafter stripping the extracted tungsten from the organic extracting agent with ammonia to form an ammoniacal tungstate solution, crystallizing a portion of the tungsten contained in the ammoniacal tungstate solution to form a two phase system wherein an ammoniacal tungstate compound comprises the first phase and wherein the resulting mother liquor containing the balance of the contained tungsten comprises the second phase, and repeating the process using the mother liquor as at least a portion of the aqueous medium to dissolve the sodium tungstate crystals.
摘要翻译：一种用于回收钨作为钨酸钨的方法，其包括使含钨材料与氢氧化钠反应以产生钨酸钠并从其中形成第一含水钨酸钠溶液，从第一钨酸钠水溶液中使钨酸钠结晶，将所得的钨酸钠晶体在水性介质中形成第二钨酸钠水溶液，用有机萃取剂从第二钨酸钠水溶液中提取钨，其中含有钨的萃取剂能够用氨除去提取的钨，然后将提取的钨从有机萃取剂中与氨反应形成一种氨基钨酸盐溶液，使一部分钨酸铵溶液中所含的钨结晶形成两相体系，其中氨基钨酸盐化合物包含第一相，其中所得的含有所含钨的余量的母液包括第二相，并且重复使用母液作为至少一部分水性介质以溶解钨酸钠晶体的方法。

8. 发明授权

US4560539A Removal of ammonia from sodium tungstate solutions 失效
标题翻译：从钨酸钠溶液中去除氨
公开(公告)号：US4560539A
公开(公告)日：1985-12-24
申请号：US690549
申请日：1985-01-11
申请人： Tai K. Kim , Robin W. Munn , Carl W. Boyer , Martin C. Vogt
发明人： Tai K. Kim , Robin W. Munn , Carl W. Boyer , Martin C. Vogt
IPC分类号： C01C1/10 , C01G41/00
CPC分类号： C01G41/00 , C01C1/10
摘要： A process is disclosed for removing ammonia from a sodium tungstate solution. The process involves heating the solution at from about 80.degree. C. to about 95.degree. C., while at the same time maintaining the pH above about 9.4 by addition of sodium hydroxide to the sodium tungstate solution. The heating is carried out for a period of time sufficient to allow the essentially complete removal of the ammonia.
摘要翻译：公开了从钨酸钠溶液中除去氨的方法。该方法包括将溶液加热至约80℃至约95℃，同时通过向钨酸钠溶液中加入氢氧化钠将pH保持在约9.4以上。进行加热足以允许基本上完全除去氨的时间。

9. 发明授权

US4374099A Recovery of tungsten values from alkali tungstate solutions by solvent extraction 失效
标题翻译：通过溶剂萃取从碱式钨酸盐溶液中回收钨值
公开(公告)号：US4374099A
公开(公告)日：1983-02-15
申请号：US292377
申请日：1981-08-13
申请人： Tai K. Kim , Martin B. MacInnis , Robert P. McClintic , Martin C. Vogt
发明人： Tai K. Kim , Martin B. MacInnis , Robert P. McClintic , Martin C. Vogt
IPC分类号： C01G41/00
CPC分类号： C01G41/003
摘要： In a two component extraction system for producing ammonium tungstate from aqueous alkali metal tungstate solution, the stripping solution consists essentially of water and from about 5 to about 21 percent by weight ammonium hydroxide at a pH of from about 12 to 13 wherein the stripping is carried out by dispersing the aqueous ammonia solution in the loaded organic extractant.
摘要翻译：在用于由碱金属钨酸钠水溶液制备钨酸铵的双组分萃取系统中，汽提溶液基本上由水和约5至约21重量％的氢氧化铵组成，pH为约12至13，其中汽提被携带通过将氨水溶液分散在负载的有机萃取剂中。

10. 发明授权

US4369165A Recovery of tungsten values from alkali tungstate solutions by solvent extraction 失效
标题翻译：通过溶剂萃取从碱式钨酸盐溶液中回收钨值
公开(公告)号：US4369165A
公开(公告)日：1983-01-18
申请号：US292379
申请日：1981-08-13
申请人： Tai K. Kim , Martin B. MacInnis , Martin C. Vogt , Robert P. McClintic
发明人： Tai K. Kim , Martin B. MacInnis , Martin C. Vogt , Robert P. McClintic
IPC分类号： C01G41/00 , C22B3/28 , C22B3/40
CPC分类号： C22B3/0095 , C01G41/003 , C22B3/0012 , Y02P10/234
摘要： In a three component extraction system for producing ammonium tungstate from aqueous alkali metal tungstate from aqueous alkali metal tungstate solution, the stripping solution consists essentially of water and from about 5 to about 21 percent ammonium hydroxide at a pH of from about 12 to about 13 wherein the stripping is carried out by dispersing the aqueous ammonia solution in the loaded organic extractant.
摘要翻译：在由碱金属钨酸钠水溶液的碱金属钨酸盐水溶液制备钨酸铵的三组分提取系统中，汽提溶液基本上由水和约5至约21％的氢氧化铵组成，pH约为12至约13，其中通过将氨水溶液分散在负载的有机萃取剂中来进行汽提。

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