SYNTHESIS OF IONITE BASED ON EPOXY RESINS AND POLYAMINES USING NEW INITIATING SYSTEMS FOR METAL SORPTION

Abstract

Abstract. Purification of drinking water, isolation of rare metals from industrial wastewater, and water treatment for a wide variety of applications are constant tasks requiring various solutions. Population growth, the development of new territories, agriculture, factories and manufacturing enterprises, all of them need clean water. Ionite is an ion–exchange resin, one of the ways to solve the described problems. Ionite is able to sort various ions from solutions, thereby purifying them or releasing valuable ions during sorption. The urgent task is to produce ionites more economically with minimal energy and material costs. The process of ionite synthesis consists in polymerization and copolymerization of various monomers, while introducing various initiators and changing the process conditions, it is possible to achieve a product with high characteristics.
The ionite was based on well-known monomers such as epoxy resins and aliphatic polyamines. The reagents used were (AGE) allylglycidyl ether, (ED-20) epoxy resin, and (PEI) polyethyleneimine. A product was synthesized from diglycidyl ether of dioxydiphenylpropane, allylglycidyl ether, and polyethylenimine using initiating systems based on potassium persulfate (K2S2O8) and azobisisobutyronitrile (AIBN). The synthesis process and method of introducing the initiator into the reaction mass were selected. The reaction was carried out in an organic solvent medium (DMF) - dimethylformamide. These initiators have not been described in known sources in combination with specific reagents during the synthesis of the ion exchanger. Further, the properties of a weakly basic anion exchanger were investigated using various methods, gravimetric, acid-base titration, infrared spectroscopy, atomic emission spectral analysis. The study of sorption capacity was carried out on the ions of metavanadate (VO3-). According to the content of vanadium - (V), in the solution before and after sorption, the sorption capacity of the ionite - (CE) in mg/g was calculated.
The resulting ionite can solve the problems of water purification and industrial wastewater treatment. It can be used for the selective extraction of non-ferrous and rare metals contained in industrial wastewater.