发明名称 |
METHOD FOR PRODUCING POTASSIUM FLUOROTANTALATE CRYSTAL BEING LOW IN OXYGEN CONTENT AND METHOD FOR PRODUCING POTASSIUM FLUORONIOBATE CRYSTAL BEING LOW IN OXYGEN CONTENT, POTASSIUM FLUOROTANTALATE CRYSTAL BEING LOW IN OXYGEN CONTENT AND POTASSIUM FLUORONIOBATE CRYSTAL BEING LOW IN OXYGEN PRODUCE |
摘要 |
The object of the present invention is to provide a method of producing low oxygen-containing potassium fluorotantalate crystals or low oxygen-containing potassium fluoroniobate crystals, the crystals obtained by the production method, and a method of analyzing oxygen contained in these crystals. <??>The method of producing low oxygen-containing potassium fluorotantalate crystals comprises generating recrystallized potassium fluorotantalate crystals by controlled cooling of a saturated solution of potassium fluorotantalate containing hydrofluoric acid as an essential component, collecting the generated recrystallized crystals through filtration, and drying the collected recrystallized crystals in a drying apparatus so as to obtain the crystals, and the production method is characterized in that the saturated solution of potassium fluorotantalate containing hydrofluoric acid as an essential component contains hydrofluoric acid in a concentration of 0.5 mol/l to 10 mol/l. <IMAGE>
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申请公布号 |
EP1433752(A1) |
申请公布日期 |
2004.06.30 |
申请号 |
EP20020768053 |
申请日期 |
2002.09.25 |
申请人 |
MITSUI MINING & SMELTING CO., LTD. |
发明人 |
UCHINO, YOSHITSUGU;KINOSHITA, MASANORI |
分类号 |
C01G33/00;G01N31/00;C01G23/00;C01G35/00;C01G35/02;G01N1/28;G01N1/34;G01N1/40;G01N31/12;(IPC1-7):C01G33/00;G01N21/35 |
主分类号 |
C01G33/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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