ZSM-5催化葡萄糖清洁转化合成乙酰丙酸  

Clean Conversion of Glucose to Levulinic Acid Catalyzed by ZSM-5

作　　者：隋小玉[1] 林鹿[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《化学反应工程与工艺》2010年第1期74-78,87,共6页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(50776035;U0733001);教育部博士点基金(20070561038);"863"计划(2007AA05Z408);国家科技支撑计划(2007BAD34B01);"973"计划(2010CB732201)

摘　　要：研究了以沸石分子筛ZSM-5为催化剂,水解葡萄糖制备乙酰丙酸的反应,探讨了催化剂用量、反应温度、反应时间对乙酰丙酸得率的影响。结果表明,在催化剂用量3 g、温度190℃、反应时间2.5 h的条件下,乙酰丙酸的最大摩尔得率可达到67.54%。通过X射线衍射(XRD)和X射线光电子能谱(XPS)分析了催化剂在反应前后的结构变化,发现催化剂表面结焦积炭是失活的主要原因。通过焙烧除去失活催化剂表面的积碳后进行催化反应,使得产物乙酰丙酸摩尔得率可达到57.02%。Hydrolysis of glucose to produce levulinic acid catalyzed by zeolite molecular sieve ZSM-5 was dealt with in this paper. And the effect of different factors such as amount of catalyst, reaction temperature, reaction time on the yield of levulinic acid was investigated. It was found that the highest yield of levulinic acid was 69.32% （molar percent） under the conditions of amount of catalyst 3 g, reaction temperature 190 ℃ and reaction time 2. 5 h. Surfaces structure change of the catalyst before and after the reaction were also analyzed by X ray diffraction （XRD） and X ray photoelectron spectrum （XPS）, indicating that carbonization covered the surface catalyst was the main reason of catalyst deactivation. When the carbonization was removed by baking method, the yield of levulinic acid was 57.02 % catalyzed by the regenerated catalysts.

关 键 词：乙酰丙酸 葡萄糖 ZSM-5沸石分子筛 

分 类 号：O643.36[理学—物理化学] O629.1[理学—化学]