Zn-Ca-Al mixed oxide as efficient catalyst for synthesis of propylene carbonate from urea and 1, 2-propylene glycol

Sen Liu; Suhong Sun; Xuehui Tian; Peiyong Sun; Shenghong Zhang; Zhilong Yao

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Zn-Ca-Al mixed oxide as efficient catalyst for synthesis of propylene carbonate from urea and 1, 2-propylene glycol

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Zn-Ca-Al mixed oxide as efficient catalyst for synthesis of propylene carbonate from urea and 1, 2-propylene glycol
- Chinese Journal of Chemical Engineering Vol. 25, Issue 5, Pages: 609-616(2017)
- Affiliations：
  
  1. College of Chemical Engineering, Sichuan University,Chengdu,China,610065
  2. Beijing Key Laboratory of Enze Biomass Fine Chemicals, College of Chemical Engineering, Beijing Institute of Petrochemical Technology,Beijing,China,102617
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2017
- Accepted：
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Sen Liu, Suhong Sun, Xuehui Tian, Peiyong Sun, Shenghong Zhang, Zhilong Yao. Zn-Ca-Al mixed oxide as efficient catalyst for synthesis of propylene carbonate from urea and 1, 2-propylene glycol[J]. , 2017, 25(5): 609-616.
DOI：

Sen Liu, Suhong Sun, Xuehui Tian, Peiyong Sun, Shenghong Zhang, Zhilong Yao. Zn-Ca-Al mixed oxide as efficient catalyst for synthesis of propylene carbonate from urea and 1, 2-propylene glycol[J]. , 2017, 25(5): 609-616. DOI：

摘要

Abstract

A series of Zn-Ca-Al oxides with different CaO and ZnO contents have been prepared and evaluated in the synthesis of propylene carbonate (PC) from 1

2-propylene glycol (PG) and urea in a batch reactor. The effect of catalyst composition

basicity and reaction process parameters such as temperature

catalyst dose

molar ratio of PG to urea

purge gas flow and reaction time has been studied to find suitable reaction conditions for the PC synthesis. The PC selectivity and yield under the desired conditions could reach 98.4% and 90.8%

respectively. The best performing catalyst also exhibited a good reusability without appreciable loss in the PC selectivity and yield after five consecutive reaction runs. In addition

a stepwise reaction pathway involving a 2-hydroxypropyl carbamate intermediate was proposed for the urea alcoholysis to PC in the presence of Zn-Ca-Al catalysts

according to the time dependences of reaction intermediates and products.

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