SCREENING OF SOLID ACID CATALYSTS FOR THE CONDENSATION OF ACETALDEHYDE WITH O-XYLENE

被引：8

作者：

BELTRAME, P

CONTE, E

FORNI, L

ZURETTI, G

机构：

[1] Dipartimento di Chimica fisica ed Elettrochimica, Universita' di Milano, I-20133 Milan

来源：

APPLIED CATALYSIS A-GENERAL | 1995年 / 128卷 / 01期

关键词：

1,1-BIS(3,4-DIMETHYLPHENYL)ETHANE; SEMIBATCH REACTOR; SOLID ACID CATALYSTS; ZEOLITES;

D O I：

10.1016/0926-860X(95)00072-0

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：

Condensation of acetaldehyde with ortho-xylene was carried out in the presence of solid acid catalysts, in spite of the strongly competitive autocondensation of acetaldehyde to give crotonaldehyde. A semibatch reactor, with a continuous feed of paraldehyde into a stirred system containing o-xylene and the catalyst, proved more convenient to obtain 1,1-bis(3,4-di-methylphenyl)ethane, because it assures a high o-xylene/acetaldehyde ratio. High selectivity was found in runs at 140 degrees C, over zeolitic catalysts of type Y (dealuminated) or beta. Some catalyst deactivation was observed and a partial regeneration was found possible.

引用

页码：143 / 154

页数：12

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