| abstract |
The invention discloses a method for synthesizing diurethane. The method is to take carbamate and alkyl or aryl diamine as reactant and an organic solvent as a reaction medium, control the reaction temperature to be between 80 and 300 DEG C and the reaction pressure to be between 1.0 and 2.0 MPa, and catalyze and synthesize the diurethane, wherein the catalyst is one or two selected from Zn(OAc)2, Pb(OAc)2, SnCl2, NiO,SnO2 and ZnO. The method mainly has the characteristics of mild reaction conditions, cheap and easily obtained catalyst, good reusability, easy reclaiming and separation, good economical efficiency of the carbamate raw material, high purity of products, small number of byproducts, and high industrial application value. |