METHOD OF CONCENTRATING URANIUM FROM DILUTED SOLUTIONS Russian patent published in 2010 - IPC C01G43/00 

FIELD: chemistry.

SUBSTANCE: uranium is sorbed with anionites, the anionite is washed from impurities and resaturated with uranium by bringing it into contact with a portion of the uranium strippant, uranium is desorbed with acid-salt solutions and uranium peroxide is precipitated from the commercial-grade strippant using hydrogen peroxide. The acid is first neutralised with an ammonium or alkaline solution to pH 4.0-4.2. Before resaturation, the anionite is treated with an alkaline or alkaline-salt solution with subsequent forced phase separation. Uranium peroxide is precipitated during partial supply of hydrogen peroxide while stirring continuously for 2 hours. The pH value is repeatedly corrected to a value 4.0-4.2 using the same reagents and then stirring for 2.5-3 hours.

EFFECT: invention enables intensification of the process of sorbtion extraction a desired component, reduction of consumption of reagents on desorption and treatment of the commercial-grade strippant, and improves quality of the end product.

2 cl, 3 tbl, 3 ex