摘要
考察了两种新的用于甲醇液相羰化制取甲酸甲酯（ＭＦ）的催化体系──环氧丙烷（ＰＯ）助催的含氮有机碱：三乙胺和咪唑。试验结果表明，无环氧丙烷助催的三乙胺和咪唑具有一定的催化活性，但催化活性极小；添加少量环氧丙烷助催的三乙胺和咪唑，其催化活性显著提高。相同时间内的甲酸甲酯摩尔收率分别提高１１０倍和３５０倍。温度对催化活性的影响试验结果发现，环氧丙烷助催的三乙胺和咪唑催化体系具有奇特的反应温度～产物收率关系：９０℃附近的收率最高。
Two new catalytic systems-propylene oxide(PO)-promoted triethylamine and pro-pylene oxide-promoted imidazole have been studied.The experimental results have showedthat unpromoted triethylamine and unpromoted imidazole have only very low catalyticactivities for methanol carbonylation to methyl formate. However, PO-promoted triethylamineand PO-promoted imidazole have much higher catalytic activities.The catalytic activity ratioof PO-promoted to PO-unpromoted is 110 for triethylamine and 350 for imidazole. From theresults of temperature effect,it can be seen that PO-promoted triethylamine and PO-pro-moted imidazole systems have peculiar temperature-yield relationships, lower temperature isadvantageous to improvement of activity of PO-promoted triethylamine and PO-promoted imi-dazole,and these peculiar relationships are probably related to catalytic mechanism of thecatalysts used.
出处
《石油化工》
EI
CAS
CSCD
北大核心
1994年第4期211-215,共5页
Petrochemical Technology
基金
国家自然科学基金
关键词
甲醇
甲酸甲酯
羰化
催化体系
triethylamine, imidazole, propylene oxide,methanol, methyl formate,carbonylation, nitrogenous organic base
