摘要
以糠酸、甲醇、氢气为原料,采用连续流动固定床微反应器,Pd-Ni/γ-Al2O3为催化剂,使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯.研究了反应的温度,压力,气、液体流速,进料流量等因素对催化反应的影响.结果表明:在1.5MPa,250℃,氢气空速3300 h-1,液体空速3.0 h-1(氢油比为50)时,糠酸转化率为96.6%,四氢糠酸甲酯的选择性97.2.0%,产率94.0%.催化剂稳定性较好,连续运转280小时后未见活性下降.该反应体系活性高,选择性好,反应压力低,催化剂性能稳定,操作简单,产物易分离.
The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature, pressure, H2 space velocity, space velocity of furoic acid and methol, ratio of H2 and furoic acid and so on. The results obtained showed that the conversion of furoic acid was up to 96.6%, while the selectivity toward methyl tetra-hydro-furan formiate dramatically reached 97.2%, consequently, the yield of methyl tetra-hydro-furan formiate was 94.0%. The stability test showed that no sign of deactivation in furoic acid hydrogenation and methyl esterification observed over the period of more than 280 hour. The catalyst and catalytic process with high activity and selectivity, high stability, facile separation of catalyst from products, and mild process conditions would open interesting and perspectine route for hydrogenation and methyl esterification of furoic acid both for research and applications.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2007年第5期423-426,共4页
Journal of Molecular Catalysis(China)
关键词
糠酸
四氢糠酸甲酯
加氢甲酯化
furoic acid
methyl tetra-hydro-furan formiate
hydrogenation and methyl esterification
