低碳化学与化工2025，Vol.50Issue(4)：55-63,9.DOI:10.12434/j.issn.2097-2547.20240222
xZnO-CaO催化乙酸甲酯和丙二醇甲醚合成丙二醇甲醚醋酸酯
Synthesis of propylene glycol methyl ether acetate from methyl acetate and propylene glycol methyl ether catalyzed by xZnO-CaO
摘要
Abstract
Adjusting alkaline strength is one of the important methods to improve the transesterification catalytic performances of CaO-based catalysts.ZnO-CaO catalysts with different ZnO mass fractions(xZnO-CaO)were prepared by equal volume impregnation method and applied to transesterification of methyl acetate and propylene glycol methyl ether.The phase compositions and micro-morphologies of xZnO-CaO were characterized by XRD and SEM,etc,.The effects of ZnO mass fractions on xZnO-CaO's alkaline strengths were studied by CO2-TPD.The transesterification conditions were optimized by single factor analysis method.The results show that the ZnO-CaO catalyst with ZnO mass fraction of 5％(5ZnO-CaO)has suitable alkaline strength and good catalytic performance.Under the conditions of V(methyl acetate)/V(propylene glycol methyl ether)of 10,reaction temperature of 160 ℃,catalyst dosage of 0.100 g and reaction time of 2 h,the propylene glycol methyl ether conversion rate and propylene glycol methyl ether acetate selectivity of 5ZnO-CaO are 70.0％and greater than 98.0％,respectively.The conversion of active phase CaO to inactive phase Ca(AC)2 or Ca(AC)2·0.5H2O is the main cause of catalyst deactivation.The deactivated 5ZnO-CaO can be regenerated by roasting,and propylene glycol methyl ether conversion rate of the regenerated 5ZnO-CaO is 69.5％under the above-mentioned reaction conditions.关键词
ZnO-CaO催化剂/酯交换反应/丙二醇甲醚醋酸酯/碱性强度/催化剂再生Key words
ZnO-CaO catalysts/transesterification/propylene glycol methyl ether acetate/alkaline strength/catalyst regeneration分类
化学工程引用本文复制引用
吴志鹏,李宇斌,刘相洋,闫晓亮..xZnO-CaO催化乙酸甲酯和丙二醇甲醚合成丙二醇甲醚醋酸酯[J].低碳化学与化工,2025,50(4):55-63,9.基金项目
国家自然科学基金(22278286) （22278286）
中国石油化工集团有限公司项目(122027). （122027）
