REACTION OF 2-PROPANOL OVER HETEROPOLYACIDS AFTER PRETREATMENT IN AIR

被引：21

作者：

ORITA, H

HAYAKAWA, T

SHIMIZU, M

TAKEHIRA, K

机构：

[1] National Chemical Laboratory for Industry, Tsukuba

来源：

APPLIED CATALYSIS | 1991年 / 77卷 / 01期

关键词：

ACETONE; DEHYDROGENATION; HETEROPOLYACID; 2-PROPANOL;

D O I：

10.1016/0166-9834(91)80030-Z

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：

The reaction of 2-propanol over various phosphorus-containing heteropolyacids was investigated as a function of pretreatment temperature and composition of the heteropolyacids. With catalysts pretreated at 100-300-degrees-C, only propene was produced. However, after pretreatment at 450-degrees-C, the selectivity changed in favor of acetone over some mixed molybdenum and tungsten heteropolyacids. From infrared (IR) and thermogravimetry-differential thermal analysis (TG-DTA) measurements, the improvement in acetone selectivity was ascribed to the destruction of Keggin units of the heteropolyacid. The maximum selectivity to acetone was observed for H3PMo12-xW(x)O40 when x = 6.

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页码：133 / 140

页数：8

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