CUMENE DISPROPORTIONATION OVER ZEOLITE-BETA .2. STABILITY ENHANCEMENT WITH SILICA DEPOSITION AND STEAM PRETREATMENT

被引：19

作者：

TSAI, TC ^{[1
]}

WANG, I ^{[1
]}

机构：

[1] NATL TSING HUA UNIV, DEPT CHEM ENGN, HSINCHU 30043, TAIWAN

来源：

APPLIED CATALYSIS | 1991年 / 77卷 / 02期

关键词：

CUMENE DISPROPORTIONATION; SILICA DEPOSITION; STABILITY ENHANCEMENT; STEAM PRETREATMENT; ZEOLITE-BETA;

D O I：

10.1016/0166-9834(91)80066-6

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：

Two methods, silica deposition and steam pretreatment, have been developed to improve the catalytic stability of zeolite-beta for cumene disproportionation. It was found that deactivation resulted from coke formation deposited on the zeolite pore mouths. Two different mechanisms for these two stabilization methods are proposed. Steam pretreatment enhances the acid strength and results in the reduction of coke formation. Nevertheless, Si(OC2H5)4 can only deposit and decompose on the sites at the external surface and/or near the pore mouth. Accordingly, pore mouth coking is eliminated.

引用

页码：209 / 222

页数：14

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