Showing papers by "Gongying Wang published in 2005"
TL;DR: Titanocene dichloride (Cp2TiCl2) was found to be a novel and efficient catalyst for the transesterification between dimethyl carbonate and phenol to diphenyl carbonate (DPC) as discussed by the authors.
Abstract: Titanocene dichloride (Cp2TiCl2) was found to be a novel and efficient catalyst for the transesterification between dimethyl carbonate (DMC) and phenol to diphenyl carbonate (DPC). Compared with other titanium esters, Cp2TiCl2 is more stable in air and can reach maximum catalytic activity at low catalyst amount. When the reaction was carried out between 150 and 180 °C, with a molar ratio of phenol to DMC of 1:1, a reaction time 10 h, a catalyst amount 0.5% (molar ratio to phenol), the conversion of phenol was 46.8%, and the selectivity of DPC and MPC was 54.9 and 43.4%, respectively.
31 citations
Patent•
17 Aug 2005
TL;DR: In this article, the method of synthesizing dihydric alcohol mono-cyclic carboxylate (DAMA) is described. But the method is not suitable for the synthesis of other types of CARB, such as propylene glycol mono-carboxylates.
Abstract: The present invention relates to the method of synthesizing dihydric alcohol monoether carboxylate, and is especially synthesis of glycol monoether carboxylate or propylene glycol monoether carboxylate. Specifically, cyclic carbonate and carboxylate react under the presence of catalyst, and the product is rectified and separated to produce dihydric alcohol monoether carboxylate. The said process is simple and efficient.
1 citations