METHOD OF PRODUCING MAGNETIC COMPOSITE SORBENT Russian patent published in 2024 - IPC B01J20/30 B01J20/04 B01J20/28 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing nanostructured magnetic aluminosilicate composites for sorption of cesium and strontium radionuclides from aqueous media. Disclosed is a method of producing a magnetic composite sorbent, involving synthesis of magnetite nanoparticles by co-precipitation of iron (II) chlorides in an aqueous solution and their subsequent treatment, differs in that to obtain magnetite nanoparticles with constant stirring and maintaining the temperature of solution of 75–85 °C in 120 ml of a mixture containing water and ethylene glycol in equal volume ratio, powders of 12 mmol FeCl₃⋅6H₂O and 8.3 mmol Fe(NH₄)₂(SO₄)₂⋅6H₂O and 35 ml of 24% aqueous ammonia solution, after 20 minutes add 17.2 ml of 2 M aqueous solution Na₂SiO₃⋅5H₂O and 52.8 ml of 0.325 M aqueous solution NaAlO₂ and held for 30 minutes, then the obtained solution with magnetite nanoparticles is placed in an autoclave and held at temperature of 90–180 °C and pressure 70.12–1001.9 kPa for 6 hours, obtained precipitate of aluminosilicate is separated, washed with distilled water, followed by drying.

EFFECT: providing ratio SiO₂/Al₂O₃ within 1.4–1.9; ensuring ratio of magnetite and aluminosilicate within 1:3; providing high sorption characteristics and enlarging the field of application owing to the possibility of cleaning liquid media from cesium and strontium radionuclides.

9 cl, 8 dwg, 3 tbl