发明名称 |
Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution |
摘要 |
Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method. |
申请公布号 |
US8632747(B2) |
申请公布日期 |
2014.01.21 |
申请号 |
US201013140767 |
申请日期 |
2010.03.05 |
申请人 |
YAMAMOTO YOSHIHARU;SASAYA KAZUO;FUDO TAKAYUKI;NAKANO AKIRA;YAMANAKA SYUNSUKE;IGUCHI TAKAHISA;SATO FUMIATSU;IKEGAYA AKIHIKO;A.L.M.T. CORP.;SUMITOMO ELECTRIC HARDMETAL CORP.;SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
YAMAMOTO YOSHIHARU;SASAYA KAZUO;FUDO TAKAYUKI;NAKANO AKIRA;YAMANAKA SYUNSUKE;IGUCHI TAKAHISA;SATO FUMIATSU;IKEGAYA AKIHIKO |
分类号 |
C01G41/02 |
主分类号 |
C01G41/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|