K/γ-Al2O3催化丙酸甲酯合成甲基丙烯酸甲酯

doi:10.16085/j.issn.1000-6613.2015.03.032

化工进展 ›› 2015, Vol. 34 ›› Issue (3): 797-801.DOI: 10.16085/j.issn.1000-6613.2015.03.032

K/γ-Al₂O₃催化丙酸甲酯合成甲基丙烯酸甲酯

冯裕发, 周维友, 刘洋, 吴中, 何明阳, 陈群

常州大学精细石油化工重点实验室, 江苏常州 213164

收稿日期:2014-05-21 修回日期:2014-05-31 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 陈群,研究员,从事精细化工清洁催化工艺研究。E-mail:13906123032@126.com。
作者简介:冯裕发(1989-),男,硕士研究生。E-mail:yufafeng@126.com。

Synthesis of methyl methacrylate from methyl propionate over K/γ-Al₂O₃ catalyst

FENG Yufa, ZHOU Weiyou, LIU Yang, WU Zhong, HE Mingyang, CHEN Qun

School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China

Received:2014-05-21 Revised:2014-05-31 Online:2015-03-05 Published:2015-03-05

摘要/Abstract

摘要： 以K/γ-Al₂O₃作催化剂, 丙酸甲酯(MP)为原料高效合成了甲基丙烯酸甲酯(MMA), 考察了反应温度、MP质量分数、甲醛来源、K负载量、原料摩尔比及催化剂煅烧温度对反应的影响。结果表明, 反应的最佳工艺条件为:反应温度320℃, MP质量分数20%, 三聚甲醛作甲醛来源, 催化剂K负载量为12.5%, MP与甲醛的摩尔比为1:1, 催化剂煅烧温度为1100℃。在此条件下, MMA收率为39.2%, 选择性为76.1%。进一步研究表明, 随着焙烧温度的升高, Al₂O₃的晶型也发生转变, γ-Al₂O₃比α-Al₂O₃的活性高, K-O-Al键的生成有利于催化剂性能的提高。

关键词: K/&gamma, -Al₂O₃催化剂, 丙酸甲酯, 三聚甲醛, 甲基丙烯酸甲酯

Abstract: Methyl methacrylate was synthesized from methyl propionate and trioxyane over K/γ-Al₂O₃ catalyst. The effects of reaction temperature, concentration of MP, source of formaldehyde, K loading on catalyst, raw material mole ratio and calcination temperature of catalyst on the reaction were investigated. The optimum conditions for synthesizing methyl methacrylate were reaction temperature 320℃, concentration of MP 20%, trioxyane as the source of formaldehyde, K loading on catalyst 12.5%, mole ratio of MP to HCHO 1:1, calcination temperature of catalyst 1100℃. Under the optimum conditions, yield and selectivity of MMA were 39.2% and 76.1%, respectively. With the rise of calcination temperature, crystal structure of Al₂O₃ changed. Activity of γ-Al₂O₃ was better than that of α-Al₂O₃, and activity of catalyst was enhanced by forming K-O-Al in K₂Al₁₉O₂₉.

Key words: K/γ-Al₂O₃ catalyst, methyl propionate, trioxyane, methyl methacrylate

中图分类号:

TQ032.4

冯裕发, 周维友, 刘洋, 吴中, 何明阳, 陈群. K/γ-Al₂O₃催化丙酸甲酯合成甲基丙烯酸甲酯[J]. 化工进展, 2015, 34(3): 797-801.

FENG Yufa, ZHOU Weiyou, LIU Yang, WU Zhong, HE Mingyang, CHEN Qun. Synthesis of methyl methacrylate from methyl propionate over K/γ-Al₂O₃ catalyst[J]. Chemical Industry and Engineering Progree, 2015, 34(3): 797-801.

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K/γ-Al₂O₃催化丙酸甲酯合成甲基丙烯酸甲酯

Synthesis of methyl methacrylate from methyl propionate over K/γ-Al₂O₃ catalyst

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