Research on the etherification reaction of xylitol catalysed by Amberlyst-15
The etherification law of xylitol was studied using acidic ion exchange resin Amberlyst-15(A-15)as a catalyst and the hydroxyl values of the products were tracked and measured.The effects of reaction time,catalyst dosage,and reaction temperature on the etherification process of xylitol were investigated.The structure of the xylitol etherification products were analyzed using fourier transform infrared spectroscopy(FTIR)and gas chromatography-mass spectrometry(GC-MS).The experimental results showed that the hydroxyl value of xylitol could be controlled at range of 1250～1450mg KOH·g-1 at a vacuum degree of-0.1MPa and 140～150℃ for 1.5～2h with 0.4wt％～0.5wt％A-15 of the system.
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