Cyclodehydration of diethylene glycol (DEG) catalyzed by clay mineral sepiolite

被引：14

作者：

Kitayama, Y ^{[1
]}

Kamimura, M

Wakui, K

Kanamori, M

Kodama, T

Abe, J

机构：

[1] Niigata Univ, Fac Engn, Dept Chem & Mat Engn, Niigata 9502102, Japan

[2] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502102, Japan

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1999年 / 142卷 / 02期

关键词：

cyclodehydration; diethylene glycol; 1,4-dioxane; sepiolite; intracrystalline tunnel;

D O I：

10.1016/S1381-1169(98)00290-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Clay mineral sepiolite exhibited high selectivity for the catalytic conversion of diethylene glycol (DEG) into 1,4-dioxane. The selectivity for the 1,4-dioxane formation depended on weight hourly space velocity (WHSV) and the tunnel structure of sepiolite. When an excess DEG was supplied over the adsorption capacity of the tunnels in sepiolite, the selectivity for 1,4-dioxane formation from DEG decreased and by-products formation increased. These results indicate that cyclodehydration of DEG takes place in the internal space of the intracrystalline tunnels of sepiolite and by-products formation occurs on the outer surface of sepiolite. The Mg(II) ion along the tunnel wall of sepiolite acts as an active site for the cyclodehydration. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：237 / 245

页数：9

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