Abstract
Abstract The catalytic liquid-phase Beckmann rearrangement of cyclohexanone oxime to e -caprolactam over solid sulfonic acid resin in dimethyl sulfoxide (DMSO) has been successfully performed. The influences of solvent, catalyst, reaction temperature and reaction time on the rearrangement of cyclohexanone oxime in the liquid-phase were examined. The results indicate that conversion of oxime can reach 100% with 97.9% of selectivity to e -caprolactam under optimal reaction conditions. This catalytic system involved is environmentally harmless, easily separate, and the catalyst can be conveniently recovered for recycled use.
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