The preparation methods of carbonate are as follows: Reaction with alcohol or phenols and phosgene. The phosgene method is a common method for preparing polycarbonate in the past, but due to the high toxicity of phosgene, this method is gradually being replaced by other less polluting methods, such as the relatively novel carbonyldiimidazole method.
The epoxy compound reacts with carbon dioxide under the action of zinc halide to form carbonate.