Catalyst and technical-economic analysis for the synthesis of methyl methacrylate by aldol condensation

被引：0

作者：

Wang G. ^{[1
]}

Li R. ^{[1
]}

Yan Y. ^{[1
]}

Shen X. ^{[1
]}

Jia H. ^{[1
]}

Mao Z. ^{[1
]}

Wang D. ^{[1
]}

机构：

[1] State Key Laboratory of Industrial Vent Gas Reuse, National Engineering Research Center for C1 Chemistry, Southwest Institute of Chemical Co., Ltd., Chengdu

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 05期

关键词：

Acid-base catalyst; Aldol condensation; Methyl methacrylate(MMA); Techno-economics;

D O I：

10.16085/j.issn.1000-6613.2020-1042

中图分类号：

学科分类号：

摘要：

SiO2 supported cesium catalyst was prepared and its performance in the aldol condensation of formaldehyde and methyl propionate was studied in a fixed-bed reactor. X-ray diffraction, field emission scanning electron microscopy, X-ray fluorescence spectroscopy and thermal analysis were used to determine the composition and structure changes of the catalyst. The conversion of methyl propionate of 13%~15%, that of formaldehyde of 60%~65%, and the selectivity to MMA based on methyl propionate of 93%~95% were achieved. During the reaction, the crystal structure and morphology of the catalyst did not change significantly with insignificant aggregation and loss of the active component Cs and the amount of carbon deposition increased. After in-situ regeneration by carbon burning, the catalytic activity was restored, and the initial activity was even higher than that of the fresh catalyst. With the progress of the reaction, formaldehyde and methyl propionate conversions approached the average level before regeneration. For a long-term run for about 1700h, the MMA selectivity based on methyl propionate maintained at 93%~95%. Technical and economic analysis showed that the new coal-based MMA synthesis route with the core step of aldol condensation is safer, more environmentally friendly, more economical and more efficient than the traditional routes of acetone cyanohydrin and isobutylene oxidation, and hence is quite suitable for using in China, which has rich coal, lean oil, and little gas in resource structure. The route fits the national coal chemical policy, which not only can break through the patent blockade of C2 and C4 routes so as to change the existing technology pattern of the MMA industry, but also can provide an important way for coal chemical companies to enter the MMA synthesis technology field to enrich the coal chemical product chain by consuming the excess production capacities of formaldehyde, acetic acid and a large amount of low-value by-product methyl acetate. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：2574 / 2580

页数：6

共 17 条

[1] Industrial Restructuring Guidance Catalogue
[2] LI Bin, XIE Ming, QI Xiang, Et al., Progress in preparation of methyl methacrylate by ethylene route, Chemical Industry and Engineering Progress, 38, 4, pp. 1739-1745, (2019)
[3] ALBANESI G, MOGGI P., Methyl methacrylate by gas phase catalytic condensation of formaldehyde with methyl propionate, Applied Catalysis, 6, 3, pp. 293-306, (1983)
[4] WIERZCHOWSKI P T, ZATORSKI L W., Aldol condensation in gaseous phase by zeolite catalysts, Catalysis Letters, 9, 5, pp. 411-414, (1991)
[5] GOGATE M R, SPIVEY J J, ZOELLER J R., Synthesis of methyl methacrylate by vapor phase condensation of formaldehyde with propionate derivatives, Catalysis Today, 36, 3, pp. 243-254, (1997)
[6] AI M., Formation of methyl methacrylate by condensation of methyl propionate with formaldehyde over silica-supported cesium hydroxide catalysts, Applied Catalysis A: General, 288, 1, pp. 211-215, (2005)
[7] MAMORU A I., Formation of methyl methacrylate from methyl propionate and methanol, Catalysis Today, 111, 3, pp. 398-402, (2006)
[8] Method for silica-supported preparing alkali metal catalysts
[9] Process for the production of ethylenically unsaturated carboxylic acids or esters
[10] YAN Jianbiao, ZHANG Chunlei, NING Chunli, Et al., Vapor phase condensation of methyl acetate with formaldehyde to preparing methyl acrylate over cesium supported SBA-15 catalyst, Journal of Industrial and Engineering Chemistry, 25, pp. 344-351, (2015)

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