The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde

Chen Cheng; Hui Chen; Xia Li; Jianli Hu; Baochen Liang

Korean Chemical Engineering Research, Vol.53, No.4, 463-467, August, 2015

DOI10.9713/kcer.2015.53.4.463 Export Citation

The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde

Chen Cheng, Hui Chen^†, Xia Li, Jianli Hu, and Baochen Liang

School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, China

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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.

Keywords:1,2-propylene Glycol;2,4-dimethyl-1,3-dioxolane;Ion-exchange Resin;Polyhydroxy Compounds;Acetalization

[References]

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Dhale AD, Myrant LK, Chopade SP, Jackson JE, Miller DJ, Chem. Eng. Sci., 59(14), 2881 (2004)

[1] Dietrieh A, Norbert W, “Method of Preparing 1,3-propanediol,” US Patent 5015789(1991).

[2] Allen KD, “Preparation of 1,3-Propanediol Used in Polyester Production,” US Patent 5777182(1998).

[3] Texaco Chemical Company, “Process for Cogeneration of Ethylene Glycol and Dimethyl Carbonate,” US Patent 5214182(1993).

[4] 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).

[5] Ko CH, Park SH, Jeon JK, Suh DJ, Jeong KE, Park YK, Korean J. Chem. Eng., 29(12), 1657 (2012)

[6] Dhale AD, Myrant LK, Chopade SP, Jackson JE, Miller DJ, Chem. Eng. Sci., 59(14), 2881 (2004)