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1. 发明专利

JPH0280530A METHOD FOR SEPARATING RARE EARTH ELEMENT 失效
公开(公告)号：JPH0280530A
公开(公告)日：1990-03-20
申请号：JP23185488
申请日：1988-09-16
申请人： JAPAN METALS & CHEM CO LTD
发明人： YAMAGUCHI TOSHIMITSU , KUDO HIROYUKI , OGURA HIROSHI , TAKAHASHI SEIJI , KOJIMA NOBORU
IPC分类号： C22B59/00 , C22B3/20 , C22B3/38
摘要： PURPOSE:To simply separate and recover each rare earth element and Y with good accuracy by bringing the rare earth element salt water solution into contact with extracting agent, stripping middle rare earth elements from the extracting agent, successively stripping heavy rare earth elements and Y and further, extracting the heavy rare earth elements. CONSTITUTION:The water solution of the rare earth element salts is brought into contact with the acidic phosphoric series extracting agent. By this method, Sm, Eu, Gd, Tb (middle rare earth elements) Dy, Ho, Er, Tm, Yb, Lu (heavy rare earth elements) and Y are extracted and while remaining La, Ce, Pr, Nd (light rare earth elements) in the water solution, they are separated and recovered. Successively, by back-extracting the middle rare earth elements from the above extracting agent with dilute mineral acid water solution, they are separated and recovered. Further, the heavy rare earth elements and Y are back-extracted from the extracting agent with the mineral acid water solution. This mineral acid water solution is adjusted for pH, and from this, the heavy rare earth elements are extracted with ternary saturated fatty acid series extracting agent, and while remaining Y in the water solution, they are separated and recovered. After that, by back-extracting the heavy rare earth elements from the above extracting agent with the mineral acid water solution, they are separated and recovered. By this method, each rare earth element and Y are continuously separated with good accuracy in a short time and the separation of the single element sat the next process is facilitated.

2. 发明专利

JPS6283035A PREPARATION OF LITHIUM ADSORBENT 失效
公开(公告)号：JPS6283035A
公开(公告)日：1987-04-16
申请号：JP22336285
申请日：1985-10-07
申请人： JAPAN METALS & CHEM CO LTD
发明人： YAMAGUCHI TOSHIMITSU , HONDA JITOKU , IIDA TOYOO
IPC分类号： B01J20/06 , B01J20/04 , C01D15/00
摘要： PURPOSE:To enhance the adsorbing efficiency of lithium in geothermal water, by a lithium adsorbent prepared by a method wherein a specific amount of manganese oxide is mixed with a specific amount of lithium hydroxide, lithium oxide or lithium carbonate and the resulting mixture is roasted before immersed in an aqueous sulfuric acid solution. CONSTITUTION:3-20wt% of a lithium compound such as lithium hydroxide, lithium oxide or lithium carbonate is mixed with 100wt% of manganese oxide as Li. After the resulting mixture is roased, the roasted one is immersed in an aqueous sulfuric acid solution and subsequently filtered, washed and dried to prepare a lithium adsorbent. The structure of this adsorbent is formed by such a process that Li is taken in a MnO2 crystal when MnO3 is converted to Mn3O4 and this Li is extracted in the same way as MnO by sulfuric acid treatment to form voids easy to take-in a Li-ion or a lithium hydrate and, therefore, the lithium adsorbing efficiency of said adsorbent is enhanced.

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