METHOD FOR PREPARING DICARBAMATE COMPOUNDS

摘要

The present invention provides a preparing method of dicarbamate, comprising: a first step of obtaining an alcohol solution including diureido obtained by reacting diamine having 2 to 13 carbon atoms with urea in the presence of alcohol having 3 to 12 carbon atoms at low temperature of 150°C or less; and a second step of obtaining dicarbamate by reacting the alcohol solution including the diureido at high temperature of 200°C or more under carbon dioxide pressure. According to the preparing method of the present invention, yield and selectivity of dicarbamate are significantly increased, and formation of an alkylated amine by-product can be minimized.