Abstract
Mg–Al hydrotalcites with different Mg/Al molar ratios were prepared and characterized by XRD, FT-IR, SEM and BET analyses. The calcined hydrotalcite with Mg/Al molar ratio of 4.0 (LDO Mg/Al 4.0) exhibited the highest catalytic activity in the synthesis of propylene glycol methyl ether (PM). The catalytic activity relating to the amount of the basic sites and crystallinity depended on the Mg/Al molar ratio. The optimal equilibrium of acid–base property and high crystallinity made the LDO Mg/Al 4.0 an excellent catalyst in the reaction. Etherification of propylene oxide (PO) with methanol over the LDO Mg/Al 4.0 was researched. The optimized reaction conditions were as follows: 140 °C, catalyst amount 0.9 wt%, methanol/PO molar ratio 4.0 and 6 h. The PO conversion and PM selectivity were 93.2 and 97.4%, respectively. Above all, almost all the PM was 1-methoxy-2-propanol, for no 2-methoxy-1-propanol was detected by GC analysis in the reaction products, and the catalyst could be reused for five times.
Graphical Abstract
The particles of the LDH Mg/Al 4.0 showed well-developed hexagonal plates with narrow size distribution (2–4 μm) and were in line with the typical morphology for hydrotalcite-like materials. The optimal equilibrium of acid-base property and high crystallinity made the LDO Mg/Al 4.0 an excellent catalyst in the synthesis of propylene glycol methyl ether (PM) from methanol and propylene oxide (PO).
Similar content being viewed by others
References
Hootha MJ, Herberta RA, Hasemana JK, Orzecha DP, Johnsonb JD, Buchera JR (2004) Toxicology 204:123
Cheng W, Wang W, Zhao Y, Liu L, Yang J, He M (2008) Appl Clay Sci 42:111
Corley RA, Gies RA, Wu H, Weitz KK (2005) Toxicol Lett 156:193
Zhang W, Wang H, Li Q, Dong Q, Zhao N, Wei W, Sun Y (2005) Appl Catal A 294:188
Chitwood HC, Freure BT (1946) J Am Chem Soc 68:688
Martins L, Hölderich W, Cardoso D (2008) J Catal 258:14
Zhang W, Wang H, Wei W, Sun Y (2005) J Mol Catal A 231:83
Fujita S-I, Bhanage BM, Aoki D, Ochiai Y, Iwasa N, Arai M (2006) Appl Catal A 313:151
Atkins MP, Jones W, Chibwe M, US Patent 5,110,992 (1992)
Malherbe F, Besse J-P, Wadel SR, Smith WJ (2000) Catal Lett 67:197
Zeng HY, Deng X, Wang YJ, Liao KB (2009) AIChE J 55:1229
Yang Z, Xie W (2007) Fuel Processing Technol 88:631
Raj CBC, Quen HL (2005) Chem Eng Sci 60:5305
JCPDS X-ray powder diffraction file, no. 22-700 (1986)
Cavani F, Trifiro F, Vaccari A (1991) Catal Today 11:173
Kannan S, Narayanan A, Swamy CS (1996) J Mater Sci 31:2353
Costantino U, Marmottini F, Nocchetti M, Vivani R (1998) Eur J Inorg Chem 10:1439
Dos Reis MJ, Silverio F, Tronto J, Valim JB (2004) J Phys Chem Solids 65:487
Kloprogge TJ, Frost RL (1999) J Solid State Chem 146:506
Hernandez-Moreno MJ, Ulibarri MA, Rendon JL, Serna CJ (1985) Phys Chem Miner 12:34
Adachi-Pagano M, Forano C, Besse J-P (2003) J Mater Chem 13:1988
Rao MM, Reddy BR, Jayalakshmi M, Jaya VS, Sridhar B (2005) Mater Res Bull 40:347
Lei XD, Zhang FZ, Yang L, Guo XX, Tian YY, Fu SS, Li F, Evans DG, Duan X (2007) AIChE J 53:932
Xie WL, Peng H, Chen LG (2006) J Mol Catal A 246:24
Prinetto F, Tichit D, Teissier R, Coq B (2000) Catal Today 55:103
Acknowledgement
This work was supported by Scientific Research Fund of Hunan Provincial Education Department of China though key-project (No. 08A080).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zeng, Hy., Wang, Yj., Feng, Z. et al. Synthesis of Propylene Glycol Monomethyl Ether Over Mg/Al Hydrotalcite Catalyst. Catal Lett 137, 94–103 (2010). https://doi.org/10.1007/s10562-010-0335-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10562-010-0335-y