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
收藏
页码：365 / 373
页数：9
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