乙醛法合成乙酸乙酯

工业乙醛经４Ａ分子筛干燥至水分低于００３％，在乙醇铝作催化剂，无水氯化锌作助催化剂，２０～４０℃反应温度的条件下，直接合成乙酸乙酯，乙醛的转化率可达９９３％，乙酸乙酯的选择性可达９５３％。催化剂的合成和乙醛的干燥是实验的关键步骤。

Synthesis of Ethyl Acetate Using Acetaldehyde

Acetaldehyde is dried using 4 molecular sieve ,water content of dried acetaldehyde can be decreased to 0.03%.Ethyl acetate is synthesized directly using the dried acetaldehyde with Al(OC 2H 5) 3 as catalyst and ZnCl 2 as cocatalyst at 20～40℃.The conversion of acetaldehyde is 99.3% and the selectivity of ethyl acetate is 95.3%.The synthesis of catalyst and the drying of acetaldehyde are the key steps of the experiment.