Abstract
ABSTRACT Lignin precipitated from black liquor of soda pulping of bagasse was used to prepare cation-exchange resin. The effects of sulfuric acid treatment and concentration of phenol and formaldehyde on the properties of the prepared cation-exchange resin were investigated. It was found that sulfonated resinified phenolized lignin gave a resin with an ion-exchange capacity higher than that of resin, which resulted from sulfonation of resinified lignin in the absence of phenol. Infrared spectroscopy of the prepared ion-exchange resin shows new bands at 1060, 1160, 1280, and 1330 cm−1, which indicate the presence of SO3.
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