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以Co2(CO)8为催化剂,甲醇为溶剂,在一定CO压力下,催化环氧乙烷氢甲酯化合成3-羟基丙酸甲酯。考察了不同配体、催化剂/配体的摩尔比、温度、CO压力、甲醇用量对环氧乙烷氢甲酯化反应的影响。得到较佳合成工艺条件为:咪唑为配体、n(催化剂)∶n(配体)=1∶1.5、反应温度75℃、反应压力6.0 MPa、V(甲醇)∶V(环氧乙烷)=5∶1。在该优化条件下,环氧乙烷转化率为92.24%,3-羟基丙酸甲酯收率达84.35%。
Using Co2 (CO) 8 as catalyst and methanol as solvent, methyl 3-hydroxypropionate was synthesized by methylolmethoxylation of ethylene oxide under a certain CO pressure. The effects of different ligands, molar ratio of catalyst / ligand, temperature, CO pressure and methanol on hydrogenation of ethylene oxide were investigated. The optimum synthesis conditions are: imidazole as ligand, n (catalyst): n (ligand) = 1: 1.5, reaction temperature 75 ℃, reaction pressure 6.0 MPa, V (methanol) = 5: 1. Under the optimized conditions, the conversion of ethylene oxide was 92.24% and the yield of methyl 3-hydroxypropionate was 84.35%.