介孔分子筛P-SBA-15催化合成十一碳烯酸异丙酯  

Synthesis of Undecylenic Ester over Mesoporous Catalysts

作　　者：武宝萍[1] 袁兴东[1] 亓玉台[1] 沈健[1] 李聪明[1] 毕贵芹[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石油化工》2003年第11期937-940,共4页Petrochemical Technology

摘　　要：采用后合成法,将磷酸固载在纯硅介孔分子筛SBA-15的表面。XRD表征结果表明,高温焙烧后的介孔分子筛P—SBA-15保持了稳定的介孔结构,该催化剂可用于十一碳烯酸与异丙醇的酯化反应,与其它几种微孔分子筛催化剂相比,P—SBA-15分子筛是最好的固体酸催化剂。考察了磷酸的负载量、反应温度、酸醇比、催化剂用量等因素对酯化反应性能的影响。得到最佳反应条件为:反应温度140℃,酸/醇摩尔比1/1,反应时间6 h,催化剂用量为总料量质量的10％。结果表明,磷的负载量为7％(质量分数)的介孔分子筛P-SBA-15是替代液体酸合成十一碳烯酸异丙酯较为理想的固体酸催化剂,且有良好的稳定性。Well-ordered mesoporous molecular sieve P- SBA- 15 functionalized with phosphoric acid group was prepared by post - synthetic method. XRD patterns showed that stucture of P - SBA- 15 molecular sieve catalyst remained as that of all silica mesoporous molecular sieve SBA - 15. Compared with liquid acid and microporous molecular sieve catalysts, esterification performance of mesoporous molecular sieve catalysts P - SBA - 15 was the best among solid catalysts. Influence of undecylenic acid / wo - propyl alcohol mole ratio, reaction temperature, and mass of catalysts on esterif ication performance was focused in the study. Optimal reaction conditions were: reaction temperature 140 ℃ ; mole ratio of undecylenic acid / MO - propyl alcohol, 1/1; mass ratio of catalyst to reactant,10% ;and reaction time,about 6 h. Reuse of P - SBA- 15 molecular sieve indicated this catalyst had high stability under esterif ication conditions.

关 键 词：十一碳烯酸异丙酯 十一碳烯酸 异丙醇 酯化反应 介孔分子筛 磷酸 催化剂 后合成法 

分 类 号：TQ426[化学工程] TQ225.52