Effect of pretreatment methods on catalytic performance of titanium silicalite-1

被引：0

作者：

Guo, XW ^{[1
]}

Liu, M ^{[1
]}

Wang, XS ^{[1
]}

Li, G ^{[1
]}

Chen, YY ^{[1
]}

Liu, S ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2001年 / 22卷 / 04期

关键词：

titanium silicalite-1; pretreatment; hydrochloric acid; ammonium fluoride; nitric acid; sulfuric acid; propylene; epoxidation;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Titanium silicalite-1 (TS-1) was pretreated by solution of HCl-H2O2, NH4F-H2O2, HNO3-H2O2 or H2SO4-H2O2. The pretreated samples were characterized by IR, XRD, UV-Vis, XRF and Al-27 MAS NMR and evaluated by epoxidation of propylene with H2O2. The results showed that almost all Na+ and about 20% of TiO2 are removed from TS-1 after pretreatment. The TiO2 removed from TS-1 is extra-framework titanium species. After pretreatment, the selectivity for PO decreases, and the utilization of H2O2 increases obviously. Concerning the utilization and the conversion of H2O2, the pretreatment method with NH4F-H2O2 is the best one.

引用

页码：370 / 372

页数：3

共 6 条

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