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Received September 11, 2014
Accepted December 30, 2014
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The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde
School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, China
chenhui_410@163.com
Korean Chemical Engineering Research, August 2015, 53(4), 463-467(5), 10.9713/kcer.2015.53.4.463 Epub 29 July 2015
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Abstract
We investigated catalytic activity of ion-exchange resins in acetalization of 1,2-propylene glycol with acetaldehyde. The impacts of reaction variables, such as temperature, reaction time, catalyst loading and feedstock composition, on the conversion of 1,2-propylene glycol were measured. The life of the catalyst was also studied. Furthermore, the reaction kinetics of 1,2-propylene glycol acetalization was studied. It was found that reaction rate followed the firstorder kinetics to acetaldehyde and 1,2-propylene glycol, respectively. Therefore, overall acetalization reaction should follow the second-order reaction kinetics, expressed as r=kCnACnB = 19.74e -6650 CACB._x000D_
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References
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Allen KD, “Preparation of 1,3-Propanediol Used in Polyester Production,” US Patent 5777182(1998).
Texaco Chemical Company, “Process for Cogeneration of Ethylene Glycol and Dimethyl Carbonate,” US Patent 5214182(1993).
Arcnson DR, King CJ, “Separation of low Molecular Weight Alcohols from Dilute Aqueous Solutions by Reversible Chemical Complexation,” Ph.D. Thesis. LBL Report 24944(1989).
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Dhale AD, Myrant LK, Chopade SP, Jackson JE, Miller DJ, Chem. Eng. Sci., 59(14), 2881 (2004)
