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Korean Chemical Engineering Research,
Vol.53, No.4, 463-467, 2015
Vol.53, No.4, 463-467, 2015
The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde
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
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