螯合树脂研究 ⅩⅩⅤ．环硫（氧）氯丙烷与三（二）乙醇胺钠盐反应合成硫氮杂冠醚型树脂

环硫（氧）氯丙烷，不经过预先聚合，直接与三（二）乙醇胶的钠盐进行反应，制得交联的硫、氮杂冠醚型螫合树脂．提出了可能的反应机理．还研究了这类树脂对一些贵金属和非贵金属离子的吸附性能．比较了相应的含硫、氮和氧氮树脂吸附性能的差别．总的说来合硫氮的树脂对贵金属的吸附性能优于含氧、氮树脂．

SYNTHESIS AND ADSORPTION PROPERTIES OF CHELATING RESINS CONTAING AZA-AND THIO-AZACROWN ETHERS STRUCTURE

Four crosslinked resins containing aza-or thio-azacrown ether structure were.synthesized by the reaction of chloromethylthiirane(MS)or chloromethyloxirane(MO)]with triethylolamine(N)and diethyloldmine(NH) respectively in the presence of NaH using dioxane as solvent at the temperature of 50-80℃.The possible mechanism is that the monomer MS(or MO) is carried out anionic ring-opening polymerization bythe initiation of-O-Na+(or=N-Na+) to form linear pci～at first and then the further reaction of elimination of NaCl between the macromolecules and sodium salt of N (or NH) gives the crosslinked resin at last.The order of adsorption capacities ofresins for noble metals is An (Ⅲ)(2.5～4.4mmol/g),Pd(Ⅱ)(1.3-2.9mmol/g),Pt (Ⅳ)(0.56- 0.76mmol/g).The adsorption capacities of resins containing S and N (MSN,MSNH) for Ag+ are much higher(6.6～6.7 mmol/g) than those of the resins containingN (1.0～2.5mmol/g) .The adsorption percentages of.MSN and MSNH for An(Ⅲ),Pd(Ⅱ),Pt(Ⅳ) in low concemtration (20～50μg/ml) are also higher(94-99%) thanthose of the resins of MON and MONH (10～92%).