Sorption and catalytic properties of a composite material based on bentonite clay and polyethylene glycol

Abstract

In the current work bentonite clay (BC) was modified with polyethylene glycol and the sorption characteristics
of the obtained composite were investigated. The degree of extraction of Cu2+ ions from aqueous solutions by modified
BC was ( 98.96 ± 0.57) %. Also the composite material based on bentonite clay and polyethylene glycol (BC-PEG- Cu2+ )
obtained after the sorption of Cu2+ ions was used in the process of oxidative hydroxylation of yellow phosphorus ( P4 ) and
sodium hypophosphite ( NaH2P O2 · H2O ) in aqueous media as a catalyst. This process was carried out under mild conditions:
t = 60◦ C; P ( O2) = 1 atm. The final product in the oxidative hydroxylation of P4 and NaH2P O2 · H2O is phosphoric
acid, the yield of which was controlled by the spectrophotometric method and varies within (1.05-3.74)%. According to the data
obtained, with an increase in the amount of catalyst and the volume of yellow phosphorus, the yield of phosphoric acid also
increases