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采用具备酸碱双活性位的复合金属氧化物固体催化剂,催化乙酸乙酯(EA)、环氧乙烷(EO)的羧酸酯乙氧基化反应,合成乙酸乙二醇单乙醚酯(CAC)。探索了铝镁锆、铝锌锆等7种不同类型的三金属复合氧化物对EA乙氧基化反应的影响,并研究了EA乙氧基化反应中原料配比、反应温度、催化剂用量等对EO转化率、CAC产率的影响。实验结果表明,铝镁锆复合金属氧化物催化剂具有较高的催化活性,在EA∶EO原料摩尔比为4∶1、反应温度120℃、催化剂用量为1.5(wt)%时,EO转化率为88.3%,CAC产率为43.5%,乙酸二(三)乙二醇单乙醚酯(DCAC,TCAC)产率分别为26.7%和11.4%。
The composite metal oxide solid catalyst with acid-base double active sites was used to catalyze the ethoxylation of carboxylic acid esters of ethyl acetate (EEA) and ethylene oxide (EO) to synthesize ethylene glycol monoethyl ether acetate (CAC ). The effects of seven different types of trimetallic composite oxides, such as Al-Mg-Mg and Zr-Al-Zn-Zr, on the ethoxylation of EA were explored and the effects of the raw materials, reaction temperature, catalyst dosage, etc. on the EA ethoxylation reaction On EO conversion rate, CAC yield. The experimental results show that the catalyst has high catalytic activity. When the EA: EO molar ratio is 4:1, the reaction temperature is 120 ℃ and the amount of catalyst is 1.5 (wt)%, the conversion of EO is 88.3% and CAC yield was 43.5%. The yields of DCAC and TCAC were 26.7% and 11.4%, respectively.