| abstract |
PURPOSE: To obtain a readily handleable uranium adsorbent, consisting of a polyethyleneimine having a specific calix[n]arene derivative residue in the side chain and having excellent affinity and selectivity for uranyl ions. n CONSTITUTION: For example, a calix[n]arene is added to concentrated sulfuric acid and thermally reacted to provide p-toluenesulfonic acid calix[n]arene, which is then reacted with an alkylating agent to afford calixarene-p-sulfonic acid derivative. The resultant derivative is subsequently reacted with thionyl chloride to provide a calixarene-p-sulfonyl chloride, which is then dissolved in tetrahydrofuran, slowly dripped into an aqueous solution of polyethyleneimine and reacted to afford the aimed polyethyleneimine having a calix[n]arene derivative expressed by the formula (n is preferably 6W8; R is H, CH 2 OH, etc.; x and y are H, alkyl, etc.) in the side chain. n COPYRIGHT: (C)1988,JPO&Japio |