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负载型HMCM-22/PW分子筛催化合成十二烷基磷酸酯

Synthesis of Dodecyl Phosphate Catalyzed with Supported PW/MCM-22 Molecular Sieve

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【作者】 刘燕军郭明明邵建楠

【Author】 LIU Yanjun;GUO Mingming;SHAO Jiannan;College of Chemistry and Chemical Engineering,Tianjin Polytechnic University;Tianjin Engineering Research Center of Textile Fiber Interface Treatment Technology;Tianjin Polytechnic University for the Textile Auxiliaries Co, Ltd;

【机构】 天津工业大学化学与化工学院天津工业大学精细化工研究所天津工业大学纺织助剂有限公司

【摘要】 用磷钨酸(PW)以浸渍法改性HMCM-22分子筛,并用X射线衍射、扫描电子显微镜、红外光谱对催化剂进行表征。结果表明,改性后的HMCM-22分子筛原有的结构和特征未发生变化;在应用于十二醇与五氧化磷(P2O5)摩尔比为2∶1的合成单十二烷基酯化反应中,产物中单酯的选择性有了显著的提高,说明PW与HMCM-22分子筛的活性中心发生了协同作用促进了酯化反应的进行,同时也表明该催化剂有优良的催化性能;在催化剂用量为总反应物的1.5%,加水的量为6.5%,PW的负载量为4%,反应温度为90℃,反应时间为4 h的条件下单酯的选择性达90%。

【Abstract】 The HMCM-22 molecular sieve was modified with phosphotungstic acid(PW) by an impregnation method, and the resulting composite catalysts were characterized by XRD, SEM, FT-IR.The results indicated that there was no change in the original structure and characteristics of the modified HMCM-22 molecular sieve. The productivity of monododecyl ester was improved significantly for the synthesis of mono-alkyl phosphate(MPA) through esterification of dodecanol and phosphorus pentoxide at a molar ration of 2/1,indicating that the esterification was promoted synergistically by the active center of composite catalysts, thus resulting in excellent catalytic performance. For the composite catalyst loaded with 4 wt % PW, a high productivity of 90 %was achieved when the amount of water was 9 g,the amount of composites catalysts in total reactants was 1.5 wt %, the reaction temperature was set at 90 ℃, and the reaction time was set as 4 h. This suggests that the PW/HMCM-22 composite molecular sieve has an excellent catalytic effect.

【基金】 中石化项目(217010-3)
  • 【分类号】TQ423.11
  • 【下载频次】124
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