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RUSSIAN JOURNAL OF INORGANIC CHEMISTRY

ISSN:0036-0236

2019

Bezhin, N.A.¹

Lyapunov, A.Yu.¹

Baulin, V.E.²

Baulin, D.V.¹

Tsivadze, A.Yu.¹

10.1134/S0036023619090031

Synthetically convenient method for preparing phosphoryl podand 1,8-bis[2-(diphenylphosphorylmethyl)phenoxy]-3,6-dioxaoctane (L) has been developed. Recovery of Pb2+ with impregnated type sorbents was studied, the sorbents contain isodentate organic ligands-phosphoryl podand L and crown ether (4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6)-as extractants. A sorbent based on the phosphoryl podand quantitatively extracts lead from neutral solutions (R = 98.4%) and does not recover it from acid solutions. On the contrary, the sorbents based on 4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6 do not extract lead from neutral media and efficiently adsorb it from nitric and hydrochloric acid solutions (R = 90% from 3 M nitric acid solutions and R = 73.2% from 2 M hydrochloric acid solutions). Effect of diluent and support type, support pretreatment procedure, impregnation temperature and time, and solvent for support impregnation on lead sorption with sorbents based on 4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6 have been studied.

SORPTION, 1, 8-BIS[2-(DIPHENYLPHOSPHORYLMETHYL)PHENOXY]-3, 6-DIOXAOCTANE, 4, 4', (5')-DI(TERT-BUTYL)DICYCLOHEXYL-18-CROWN-6

2019-12-12 15:49:00