REACTION OF PROPIONIC-ACID WITH METHYLAL OVER VANADIUM SILICON PHOSPHORUS OXIDE

被引：13

作者：

AI, MR

机构：

[1] Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku

来源：

APPLIED CATALYSIS | 1990年 / 63卷 / 02期

关键词：

aldol condensation; methacrylic acid; methylal; propionic acid; selectivity (methyl methacrylate); vanadium-silicon-phosphorus;

D O I：

10.1016/S0166-9834(00)81725-X

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 vapour-phase condensation of propionic acid with formaldehyde was performed using methylal as the source of formaldehyde. The main products were methyl methacrylate and methacrylic acid. Vanadium-silicon-phosphorus oxide with an atomic ratio of 1:8:2.8 showed a better catalytic performance than vanadium-phosphorus oxide with an atomic ratio of 1:1.06. The one-pass yield of methyl methacrylate plus methacrylic acid, based on the methylal charged, was 53 mol-% with a propionic acid-to-methylal molar ratio of 2, and reached 70 mol-% with a propionic acid-to-methylal molar ratio of 5.2. The effects of reaction variables such as temperature, concentration of propionic acid and water vapour on the yield and selectivity were studied. © 1990.

引用

页码：365 / 373

页数：9