偕胺肟螯合树脂的合成研究及铀吸附性能测定

THE SYNTHESIS OF MACRORETICULAR CHELATING RESINS CONTAINlNG AMIDOXIME GROUPS AND THEIR PROPERTIES OF RECOVERY OF URANIUM

采用悬浮聚合的方法成功地合成了以二乙烯苯（DVB）交联丙烯腈（AN）共聚物为骨架的胺肟大孔螯合树脂。较详尽地研究了DVB－AN珠体胺肟化反应的影响因素：反应介质、反应比、反应温度、反应时间等，成功地制备了不同物理性能和不同单体组成的共聚物及胺肟螯合树脂，并且探讨了交联剂、致扎利、极性单体等因素对树脂的化学交换容量的影响。在本文描述的实验条件下，胺肟螯合树脂（干）的化学交换容量达到4．0mmol／g以上，经初步测定铀吸附性能取得了理想结果。

In this paper, macroreticular chelating resins containing amidoxime groups were sucessfully synthesized with divinyl benzene (DVB ) cross-linking acrylonitrile (AN ) copolymer beads as skeleton by suspension polymerization. Influence factors of DVB-AN beads amidoxime reaction, such as reaction medium, reaction ratio, reaction temperature and time etc. were studied in detail. Copolymer and chelating resins with amidoxime groups having different physical properties and monomer composition were prepared successfully.The factors affecting resin chemical adsorption capacity, such as cross-linking agent, reticulating agent and polar monomer etc. were also explored. The resins had chemical adsorption capacity over 4. 0 mmol/g(dry),and ideal results of recovered uranium under the conditions as the paper described.