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本文系统研究了十一个三价稀土氧化物的酯化催化作用,这十一个稀土氧化物是:La_2O_3、Nd_2O_3、Sm_2O_3、Eu_2O_3、Gd_2O_3、Dy_2O_3、Ho_2O_3、Er_2O_3、Tm_2O_3、Yb_2O_3、Lu_2O_3。根据实验结果,得出如下结论:(1)三价稀土氧化物对酯化反应都具有催化活性,酯化反应速度都比无催化剂时快,(2)轻稀土氧化物比重稀土氧化物的催化活性好,特别是Sm_2O_3与Nd_2O_3的活性最大,有实际应用的前景。Eu_2O_3活性也令人满意。(3)重稀土氧
In this paper, the esterification of eleven trivalent rare earth oxides has been systematically investigated. The eleven rare earth oxides are La 2 O 3, Nd 2 O 3, Sm 2 O 3, Eu 2 O 3, Gd 2 O 3, Dy 2 O 3, Ho 2 O 3, Er 2 O 3, Tm 2 O 3, Yb 2 O 3 and Lu 2 O 3. According to the experimental results, the following conclusions can be drawn: (1) The trivalent rare earth oxides have catalytic activity for both esterification and esterification faster than those without catalyst, (2) the catalytic activity of rare earth oxides Good activity, especially the activity of Sm_2O_3 and Nd_2O_3, which has the practical application prospect. Eu 2 O 3 activity is also satisfactory. (3) heavy rare earth oxygen