Hydrolysis of Methyl Acetate Under Near-and Supercritical Conditions

Abstract

Abstract: Near-and supercritical water is an excellent medium for conducting chemical reactions, and is especially propitious to the development of environmentally benign techniques for acid/base catalyzed organic reactions. The work presented in this paper focuses on experimental investigation on noncatalytic hydrolysis for methyl acetate, trying to overcome high energy consumption and other defects of conventional ones. Hydrolysis of methyl acetate(5%) in this work was carried out in a tubular reactor under near-or supercritical conditions(523-673 K, 23-32 MPa), and characteristic of hydrolysis was investigated via combining various reaction conditions. The experimental results show that under the optimized operating condition conversion of methyl acetate achieves thermodynamic equilibrium within 150 to 300 s, the selectivity of which process closes to 1, with no acid catalyst added. Due to phase transition resulted from broad experimental range and singularity of supercritical zone, the influence of temperature and pressure on the reactivity takes on a complicated trend, transition-state theory and cluster theory were adopted to interpret experimental phenomena, also reaction kinetics was established based on S_N2 mechanism. Conclusion drawn from this work indicates the promising prospect of applying near-and supercritical reaction technology to the industrial practice of hydrolysis of methyl acetate.

Key words: Methyl acetate, Supercritical, Near-critical, Hydrolysis

CLC Number:

TQ031.5

TrendMD:

YUAN Pei-Qing, CHENG Zhen-Min, LIU Tao, YUAN Wei-Kang . Hydrolysis of Methyl Acetate Under Near-and Supercritical Conditions[J]. Chem. J. Chinese Universities, 2003, 24(7): 1241.

[1]	TAN Yan, YU Shen, LYU Jiamin, LIU Zhan, SUN Minghui, CHEN Lihua, SU Baolian. Efficient Preparation of Mesoporous γ-Al₂O₃ Microspheres and Performance of Pd-loaded Catalysts [J]. Chem. J. Chinese Universities, 2022, 43(8): 20220133.
[2]	CAO Meiqi, LIU Xia, CUI Shuxun. Single-molecule Mechanics of Polyacrylamide Under Different Liquid Environments [J]. Chem. J. Chinese Universities, 2021, 42(9): 2982.
[3]	WANG Yang, WANG Sidi, TANG Shaokun. Synthesis and Characterization of Imine-based Covalent Organic Framework(COF-LZU1) in Supercritical Carbon Dioxide [J]. Chem. J. Chinese Universities, 2020, 41(8): 1792.
[4]	LIU Siming, WANG Jiannan, YU Shen, LIU Zhan, WANG Zhao, LI Xiaoyun, CHEN Lihua, SU Baolian. Preparation of High-surface-area Hierarchically Porous γ-Al₂O₃ by One-step Hydrolysis of Metal Alkoxide and Performance ^† [J]. Chem. J. Chinese Universities, 2020, 41(6): 1208.
[5]	WANG Chenfeng, XU Qiuyu, WANG Lincai, ZHANG Ruiqi, PAN Xinxin, WANG Jingwei, HAO Weiju. Preparation of a Sandwich-like Ni-P@Ni-B/Ni Catalytic Electrode for pH-Universal Hydrogen Evolution Reaction ^† [J]. Chem. J. Chinese Universities, 2019, 40(10): 2156.
[6]	HUANG Haihong, ZHANG Baoyu, ZHAO Zhipei. Degradation and Characterization of Recycling Carbon Fiber/Epoxy Resin Composites in Supercritical n-Butanol^† [J]. Chem. J. Chinese Universities, 2017, 38(9): 1687.
[7]	GENG Lihua, JIN Weihua, WANG Jing, ZHANG Quanbin. Fucoidan Degradation and Preparation of Fuco-oligosaccharides from Saccharina japonica^† [J]. Chem. J. Chinese Universities, 2017, 38(12): 2193.
[8]	WANG Meiyi, MA Yi, WANG Haiying, CAO Gang, LI Zhengming. Kinetics of the Chemical Hydrolysis and 3D-QSAR Study of 5-Substituted Benzenesulfonylurea Compounds^† [J]. Chem. J. Chinese Universities, 2016, 37(9): 1636.
[9]	LIU Xuewu,CHEN Shuhua,ZHAN Shiping. Experimental Study and Theoretical Phase Diagram Calculation for Polystyrene Membranes Prepared by Supercritical CO₂-induced Phase Inversion^† [J]. Chem. J. Chinese Universities, 2016, 37(8): 1573.
[10]	ZHANG Xiao, SHAN Xindi, ZHAO Xiaoliang, LI Guoyun, WANG Xiaojiang, CAI Chao, HAO Jiejie, YU Guangli. Preparation, Characterization and Immunological Activity Evaluation of Low Anticoagulant Heparin Oligosaccharides^† [J]. Chem. J. Chinese Universities, 2016, 37(7): 1335.
[11]	WANG Donglong, ZHOU Jinghong, SUI Zhijun, ZHOU Xinggui, SCOTT L. Susannah. Synthesis and Characterization of Titanium-containing Periodic Mesoporous Organosilicas^† [J]. Chem. J. Chinese Universities, 2015, 36(6): 1042.
[12]	JIANG Guangce, LIN Xiongchao, ZHANG Shengjuan, WANG Zhongqi, WANG Yonggang, CHEN Qiang, ZHU Yufei. Supercritical Fluid Extraction of Direct Coal Liquefaction Residue Basing on Hansen Solubility Parameters^† [J]. Chem. J. Chinese Universities, 2015, 36(3): 544.
[13]	CHENG Long, BIAN Zhongxuan, DING Minyuan, ZHAO Meng, LI Hui. RAFT Polymerization of Acrylamide Polyhedral Oligometic Silsesquioxane in Supercritical CO₂⁺ [J]. Chem. J. Chinese Universities, 2015, 36(10): 2067.
[14]	SHI Huimin, WANG Hui, YIN Jinwei, ZHU Qingyun, WU Ping, Tang Yawen, Zhou Yiming, Lu Tianhong. Preparation and Lithium Storage Performance of MWCNT@SiO₂ Coaxial Nanocables^† [J]. Chem. J. Chinese Universities, 2015, 36(1): 175.
[15]	SHI Suqing, ZHAO Yang, ZHANG Qin, GAO Na, YANG Yang, GONG Yongkuan. Fabrication and Surface Properties of Hydrolyticly Function-switchable Polymer Brush^† [J]. Chem. J. Chinese Universities, 2014, 35(5): 1093.

Hydrolysis of Methyl Acetate Under Near-and Supercritical Conditions

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments