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

1.以大网状型苯乙烯-二乙烯基苯共聚物微珠(RS)为原料，制备了膦酸树脂(RSP)及其氧化衍生物膦酸树脂(RSPO)。以氯甲基化RS为原料合成了亚甲基膦酸树脂(RCSP)，并研究了这些树脂对三价稀土元素的吸附行为。稀土元素的分配随原子序数的增加而增加，每种元素的分配按RCSP&lt；RSPo&lt；RSP的顺序增加。RCSP在不使用昂贵的有机洗脱剂(如EDTA2)的情况下，有望用于稀土元素的色谱分离。以甲基丙烯酸表硫丙酯-二乙烯基苯共聚微珠为原料，制备了含硫醇基团的树脂。研究了稀土对贵金属离子的吸附行为。金属的吸收率随Pt(IV)-Ir(IV)&lt；&lt；Pd(II)&lt；Os(VIII)&lt；Au(III).的增加而增加虽然吸附的Os(VIII)和Ir(IV)很难用氰化物洗脱剂洗脱，但吸附的An(III)、Pd(II)和Pt(IV)可以用洗脱剂有效地洗脱。以甲基丙烯酸缩水甘油酯-二乙烯基苯共聚珠为原料制备了含环硫树脂(RGS)，并以RGS为原料制备了含巯基树脂(RGSH)，研究了RGS和RGSH对Au(III)、Pd(II)和Pt(IV)的吸附和洗脱行为。虽然RGSH对贵金属的吸附能力高于RGS，但RGS对吸附金属的洗脱比RGSH更为顺利。柱模式研究表明，吸附在RGS上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，成功地实现了铂(IV)与金(III)的分离。

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.