双氧水吸附净化工艺中失活树脂的失活机制及再生方法研究OACHSSCDCSTPCD

In addressing the frequent need for resin replacement due to incomplete regeneration in existing hydrogen peroxide(H2O2)production technology,this study analyzed organic impurities in LSA-5B resin before and after H2O2 adsorption,along with those impurities not fully desorbed from resin.Characterization was conducted using high-resolution liquid chromatography-mass spectrometry,thermogravimetric analysis,Fourier transform infrared spectroscopy,and X-ray photoelectron spectroscopy.Various regenerants were employed to regenerate the inactivated resin,with FT-IR result revealing the complete characteristic peak disappearance of 2-methylcyclohexyl acetate in the NaOH-treated deactivated resin.Consequently,NaOH solutions of various concentrations were tested to optimize the regeneration conditions for the inactivated resin.The results of the N2 adsorption-desorption test showed that the specific surface area of the resin was recovered to 575 m2/g using 0.25 mol/L NaOH,which was higher than 412 m2/g observed from the resin regenerated with methanol,demonstrating a superior regeneration efficacy compared to methanol regeneration.