METHOD OF PRODUCTION OF GRANULATED INORGANIC SORBENTS ON BASE OF OXYHYDRATES OF METALS Russian patent published in 2005 - IPC

FIELD: methods of production of granulated inorganic sorbents on base of oxyhydrates of metals, mainly trivalent and tetravalent used in metallurgy and chemical industry; treatment of sewage and decontamination of solutions.

SUBSTANCE: proposed method includes precipitation of oxyhydrates of metals, filtration, washing and granulation of sediment; sediment is divided into two parts: larger part is subjected to treatment with sodium chloride solution at concentration of 250-300 g/dm³ NaCl; then sediment is dried and repulped at liquid-to-solid ratio =(5-10): 1; suspension is settled, filtered and washed with water; then it is repeatedly dried; after mixing the remaining moist part of sediment, paste is granulated by extrusion.

EFFECT: increased dynamic capacity of sorbents to "jump" of radio-nuclides into filtrate.