| 钼、钨类水滑石材料的合成、结构及催化环氧化性能 |
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| 引用本文： | 周春晖,谢华丽,杜泽学,范永仙,葛忠华,李小年.钼、钨类水滑石材料的合成、结构及催化环氧化性能[J].高校化学工程学报,2009,23(3). |
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| 作者姓名： | 周春晖 谢华丽 杜泽学 范永仙 葛忠华 李小年 |
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| 作者单位： | 1. 浙江工业大学化工与材料学院,浙江,杭州,310032
2. 中国石化石油化工科学研究院,北京,100083 |
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| 基金项目： | 国家自然科学基金，浙江省自然科学基金，中石化公司科技项目 |
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| 摘 要： | 通过与大体积的有机阴离子对甲基苯磺酸根预柱撑的镁铝类水滑石(HTL)进行离子交换,制备了不同层间离子交换量(W/Al摩尔比和Mo/Al摩尔比分别为7:6,7:20,7:60)的钨、钼-类HTL催化材料,并用IR、UV-Vis、PXRD、SEM、TGA、XPS等表征结构.以H2O2为氧化剂,氯丙烯为底物,初步考察了W、Mo-HTL催化氯丙烯环氧化性能.结果表明,随着负载量的增大,有机阴离子红外吸收峰的强度随之减弱,钨、钼物种对应的红外吸收峰增强,证实层间有离子交换作用发生.钼-HTL中钼呈多种配位状态:钨-HTL中,仅当负载量比较高的时候,钨-HTL中钨呈现多种配位形态.材料系层状结构,随钨、钼量的增加,层间距有不周程度的增大.实验条件下,钨、钼-HTL对氯丙烯环氧化均有活性,钨-HTL比钼-HTL的活性高;对于W、Me-HTL,较高选择性分别为85.2%和77.3%,双氧水转化率为41.2%～94.3%.材料中多种配位形态存在,可致使H2O2有效利用率降低.
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| 关 键 词： | 水滑石 钨酸盐 钼酸盐 过氧化氢 环氧化 环氧氯丙烷 |
Synthesis and Characteristic of Catalytic Epoxidation of W,Mo-containing Hydrotalcite-like Materials |
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| ZHOU Chun-hui,XIE Hua-li,Du Ze-xue,Fan Yong-xian,GE Zhong-hua,LI Xiao-nian.Synthesis and Characteristic of Catalytic Epoxidation of W,Mo-containing Hydrotalcite-like Materials[J].Journal of Chemical Engineering of Chinese Universities,2009,23(3). |
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| Authors: | ZHOU Chun-hui XIE Hua-li Du Ze-xue Fan Yong-xian GE Zhong-hua LI Xiao-nian |
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| Affiliation: | 1. College of Chemical Engineering and Materials Science;Zhejiang University of Technology;Hangzhou 310032;China;2. SINOPEC Research Institute of Petroleum Processing;Beijing 100083;China |
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| Abstract: | Tungsten (W), molybdenum (Mo)-intercalated hydrotalcite-like materials (HTL) were synthesized by ionic exchange reaction with Mg/Al HTL precursors, during which the interlayer of the used precursors were enlarged by large organic molecules of p-toluenesulfonate. The M/Al (M=W, Mo) molar ratio of the prepared W, Mo-intercalated HTL (W, Mo-HTL) are 7:6, 7:20 and 7:60, respectively, and they were characterized by IR, UV-Vis, PXRD, SEM, TGA and XPS, respectively. In the IR spectra of the synthesized W, Mo-HTL, ... |
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| Keywords: | hydrotalcite tungstate molybdate hydrogen peroxide epoxidation epichlorohydrin |
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