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采用低过饱和共沉淀法合成了物质的量比为2,3,4的钴铁水滑石,XRD、TG-DTA和IR分析均表明它们晶形好,纯度高,以其焙烧产物为催化剂研究了乙酸正丁酯催化合成的各种影响因素。结果表明:3种焙烧产物都可以催化乙酸正丁酯反应,其中4CoFe效果最好,3CoFe次之,2CoFe第三;以4CoFe为催化剂,在最佳合成条件为酸醇摩尔比为1:2,催化剂用量0.5g,反应时间为2h,催化产率为79.0%。
The cobalt-iron hydrotalcite with the molar ratios of 2, 3 and 4 were synthesized by low-supersaturation coprecipitation method. The XRD, TG-DTA and IR analyzes showed that the crystal forms were good and the purity was high. Using the calcined product as catalyst, Various Factors Influencing the Synthesis of n-Butyl Catalysts. The results showed that all three kinds of calcined products could catalyze the reaction of n-butyl acetate. Among them, 4CoFe was the best, followed by 3CoFe and 2CoFe. The optimum synthesis conditions for 4CoFe were as follows: molar ratio of alcohol to alcohol was 1: 2, The amount of catalyst 0.5g, the reaction time was 2h, the catalytic yield was 79.0%.