Isolation and characterization of intermediate catalytic species in the Zn-catalyzed glycerolysis of urea

Title
Isolation and characterization of intermediate catalytic species in the Zn-catalyzed glycerolysis of urea
Authors
박종호최지식우수경이상득정민석김훈식이현주
Keywords
Glycerol; Glycerol carbonate; Urea; Glycerolysis; Zinc halides; Homogeneous catalysis
Issue Date
2012-08
Publisher
Applied catalysis A, General
Citation
VOL 433-434, 35-40
Abstract
Homogeneous zinc-catalyzed synthesis of glycerol carbonate from the reaction of glycerol with urea was investigated. Among the zinc-based catalysts tested, ZnCl2 showed the highest catalytic activity. Spectroscopic and elemental analyses of the zinc species, isolated from the reaction conducted in the presence of ZnCl2, revealed that Zn(NH3)Cl2 was generated first as an intermediate species, which in turn reacted with glycerol to produce zinc glycerolate, Zn(C3H6O3) and NH4Cl. The activity of Zn(C3H6O3) was considerably lower than that of ZnCl2, but the activity was greatly enhanced by the combined use of NH4Cl, implying that both Zn(C3H6O3) and NH4Cl were functioning as essential ingredients for the carbonylation of glycerol by urea. The formation of Zn(C3H6O3) was also observed when ZnBr2, ZnI2, ZnF2, Zn(NO3)2, Zn(CH3CO2)2, or ZnO was used as the catalyst.
URI
http://pubs.kist.re.kr/handle/201004/42809
ISSN
0926860X
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE