PRODUCTION OF AMINOPHOSPHORIC ACID TYPE CHELATE RESIN

摘要

PURPOSE:To obtain the title resin having high adsorption capacity and excellent cycle strength by carrying out amination reaction by using a specific mixture of a monoamine and a polyamine. CONSTITUTION:The halomethyl group of a polymer containing a halomethyl group at the aromatic nucleus is aminated with a mixed amine comprising 20-70wt.% (preferably 30-60wt.%) monoamine and a polayamine, treated with formalin and nitrous acid in the presence of a small amount of a mineral acid preferably at >=70 deg.C and phosphorylated to give the objective resin. <=5C alkanolamine is preferably used as the monoamine and usually 2-8C alkylenediamine may be cited as the polyamine.