新型合金催化剂用于木糖加氢制木糖醇的研究

Application of New-type Alloy Catalysts in Hydrogenation of Xylose to Produce Xylitol

采用大连通用化工有限公司研制的三元RaneyNi合金催化剂进行木糖加氢,考察了温度、压力、值、剂糖比和反应时间等因素对加氢反应的影响,并与其它RaneyNi类催化剂pH进行了对比。结果表明,使用大连三元RaneyNi催化剂RTH-311进行木糖加氢,当反应温度为130～140℃、压力为8～10MPa、值为6～7、剂糖质量比为2%、反应时间为90～120min时,转化率pH可达100%,产品色度好。RTH-311催化剂的木糖加氢活性好于其它类催化剂,重复使用时,也可保持较高活性。

TernaryRaney Ni alloyswereusedascatalystsforthehydrogenationofxylosetoproducexylitol.The effectsofoperatingconditionson thereactionwere examined.Hydrogenationefficiencyofdifferentcatalystswere studied.The resultsshow thatternaryRaney Ni alloycatalyst(RTH-311 )hasbetteractivitythanRaney Ni catalysts.By usingRTH-311 catalyst,thexylosecan be convertedcompletelywithgood colorattemperatureof130～140℃, hydrogenpressureof8～10MPa ,catalyst-to-xyloseratioof2 and pH valueof6～7. RTH-311 catalystremainshigh activityafterbeingusedseveraltimes.