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Transesterification of urea and ethylene glycol to ethylene carbonate as an important step for urea based dimethyl carbonate synthesis

✍ Scribed by Bhanage, Bhalchandra M.; Fujita, Shin-ichiro; Ikushima, Yutaka; Arai, Masahiko

Book ID
115449954
Publisher
Royal Society of Chemistry
Year
2003
Tongue
English
Weight
86 KB
Volume
5
Category
Article
ISSN
1463-9262

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✦ Synopsis

Two-step synthesis of dimethyl carbonate (DMC) from urea has been investigated with various solid catalysts. The first step involves reaction of urea with ethylene glycol (EG) to form ethylene carbonate (EC) and the second step transesterification of EC formed with methanol to give DMC and EG. It has been found that ZnO is highly active and selective for the two steps, of which the former should be conducted under reduced pressure. At around ambient pressure, 2-oxazolidone and ethyleneurea are formed in the first step. Similar to EG, other glycols such as 1,2-and 1,3-propanediols can also be transformed to corresponding cyclic carbonates.

πŸ“œ SIMILAR VOLUMES

Synthesis of ethylene carbonate from ure
Synthesis of ethylene carbonate from urea and ethylene glycol over zinc/iron oxide catalyst
✍ Xinqiang Zhao; Hualiang An; Shufang Wang; Fang Li; Yanji Wang πŸ“‚ Article πŸ“… 2008 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 419 KB

## Abstract **BACKGROUND:** Ethylene carbonate (EC) was synthesised via urea and ethylene glycol (EG) over zinc/iron oxide catalyst. By so doing, the by‐product, EG, generated in the process of producing dimethyl carbonate by the transesterification route was converted back to the raw material, EC.