公开(公告)号：US4080420A

公开(公告)日：1978-03-21

申请号：US766423

申请日：1977-01-27

申请人： Hans Peter Kasserra ,  Denis Bertram Kelly ,  Isaac Obadia

发明人： Hans Peter Kasserra ,  Denis Bertram Kelly ,  Isaac Obadia

IPC分类号： C01G41/00

CPC分类号： C01G41/00

摘要： A process is provided for treating tri (alkaline earth metals) tungstates with an aqueous solution containing cations selected from ammonium, sodium and potassium ions and mixtures thereof, and anions selected from hydroxide, carbonate, bicarbonate, and phosphate ions and mixtures thereof, to form a tungstate salt which is soluble in the solution and an alkaline earth metal compound which is insoluble in the solution. The tri (alkaline earth metal) tungstate can be prepared from iron tungstate, manganese tungstate, and/or an alkaline earth metal tungstate or from ores or concentrates of these tungstates, by a high temperature treatment with an alkaline earth metal donor compound, such as calcium oxide. A preferred soluble tungstate is ammonium tungstate, which can be further processed to yield tungsten trioxide and/or tungsten.

摘要翻译： 提供了一种使用含有选自铵，钠和钾离子的阳离子及其混合物的水溶液和选自氢氧化物，碳酸盐，碳酸氢盐和磷酸根离子的阴离子及其混合物的水溶液处理三（碱土金属）钨酸盐的方法，以形成 可溶于该溶液的钨酸盐和不溶于该溶液的碱土金属化合物。 三（碱土金属）钨酸盐可以由钨酸钨，钨酸锰和/或碱土金属钨酸盐或这些钨酸盐的矿石或精矿通过用碱土金属给体化合物进行高温处理制备，例如 氧化钙。 优选的可溶性钨酸盐是钨酸铵，其可进一步加工以产生三氧化钨和/或钨。