The recovery of U(VI) from sulfate solutions can be successfully accomplished using reagents of the pyrazoloquinazolinone class.In order to extract U(VI), the substance 2-(4-methylphenyl)-8,9-dihydro-8,8-dimethyl-7Hpyrazolo[1,5-a]quinazolin-6-one (MPHPQ) was developed.Utilizing a variety of analytical techniques, including Fouriertransform infrared spectroscopy (FTIR), Nuclear magnetic resonance (...