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DEVELOPMENT OF CHELATING RESINS FOR THE LOW ENERGY COST SEPARATION AND PURIFICATION OF RARE METALS

开发用于稀有金属低能耗分离和提纯的螯合树脂

基本信息

批准号：
04555222
负责人：
EGAWA Hiroaki
金额：
$ 8.26万
依托单位：
KUMAMOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

1. From stirene-divinylbenzene copolymer beads of macroreticular type (RS), phosphinic acid resins (RSP) and their oxidation derivatives, phosphonic acid resins (RSPO), were prepared. Methylenephosphonic acid resins (RCSP) were also prepared from the chloromethylated RS.The behavior of these resins in uptake of trivalent lanthanides was studied. The partition of lanthanides increases with an increase in their atomic number and that of each lanthanide increases in the order of RCSP < RSPO < RSP.The RCSP is promising in the chromatographic separation of lanthanides without use of expensive organic eluting reagents, such as EDTA.2. Resins containing mercapto groups (RES) were derived from macroreticular 2, 3-epithiopropylmethacrylate-divinylbenzene copolmer beads. Behavior of RES in adsorption of noble metal ions was studied. The metal uptake increases with the order of Pt(IV)-Ir(IV)<<Pd(II)<Os(VIII)<Au(III). Whereas the elution of the adsorbed Os(VIII) and Ir(IV) on RES with cyanide eluents was extremely difficult to achieve, the adsorbed An(III), Pd(II), and Pt(IV) were effectively eluted with the eluents.3. Resins containing episulfide groups (RGS) were derived from glycidyl methacrylate-divinylbenzene copolymer beads and resins having mercapto groups (RGSH) were also derived from RGS.Behavior of RGS as well as of RGSH in adsorption and elution of Au(III), Pd(II) and Pt(IV) was studied. Although RGSH exhibited the capacity for the noble metals higher than that of RGS, the elution of the adsorbed metals on RGS was able to be performed more smoothly than the case of RGSH.The column-mode study has revealed that the metal ions adsorbed on RGS can be quantitatively eluted with cyanide eluents. In addition, the separation of Pt(IV) from Au(III) was successfully achieved by changing the concentration of cyanide eluents.

1.以苯乙烯-二乙烯苯共聚物大孔球（RS）为原料，制备了次膦酸树脂（RSP）及其氧化衍生物膦酸树脂（RSPO）。用氯甲基化RS制备了亚甲基膦酸树脂（RCSP），研究了该树脂对三价镧系元素的吸附行为。镧系元素的分配系数随原子序数的增加而增加，其顺序为RCSP < RSPO < RSP. RCSP在镧系元素的色谱分离中具有良好的应用前景，不需要使用昂贵的有机洗脱剂，如EDTA.含有巯基的树脂（RES）来自大网状2，3-环硫丙基甲基丙烯酸酯-二乙烯基苯共聚珠。研究了RES对贵金属离子的吸附行为。Pt（IV）-Ir（IV）<<Pd（II）<Os（VIII）<Au（III）。RES上吸附的Os（VIII）和Ir（IV）很难用氰化物洗脱，而Au（III）、Pd（II）和Pt（IV）则能被有效洗脱.以甲基丙烯酸缩水甘油酯-二乙烯基苯共聚微球为原料合成了含环硫基的树脂（RGS），并以RGS为原料合成了含巯基的树脂（RGSH），研究了RGS和RGSH对Au（III）、Pd（II）和Pt（IV）的吸附和洗脱行为。尽管RGSH对贵金属的吸附容量比RGS高，但RGS对吸附金属的洗脱比RGSH更平稳，柱模式研究表明，RGS上吸附的金属离子可以用氰化物洗脱剂定量洗脱。此外，通过改变氰化物洗脱液的浓度，成功地实现了Pt（IV）和Au（III）的分离。