Process for producing polyalcohols, particularly xylitol

Details Process for producing polyalcohols, particularly xylitol Process for producing polyalcohols, particularly xylitol

C - Chemistry, Metallurgy

07

C

260/641, 260/632

C07C 31/18 (2006.01) C07C 29/88 (2006.01) C13K 13/00 (2006.01)

Patent

CA 1108649

ABSTRACT OF THE DISCLOSURE The present invention provides a process for producing xylitol comprising the stepsof: decomposing the wood of deciduous trees or annual plants with dilute mineral acid at elevated temperatures to produce a solution containing principally xylose sugar with minor proportions of acetic acid and mineral salts; subjecting the sugar solution to ionexchange treatment and de- colorization in an exchanger; hydrogenating the sugar solution to produce a polyalcohol solution containing principally xylitol; subjecting the polyalcohol solution to an ion exchange treatment; and thereafter recovering xylitol from the solution; said exchange treatment of the sugar solution and exchange treatment of the polyalcohol solution being effected in separate sugar and poly- alcohol cycles in the same exchanger.

330433

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