PRODUCTION OF 1,3-DICYCLOHEXYLCARBODIIMIDE

摘要

PROBLEM TO BE SOLVED: To provide an improved method for producing 1,3- dicyclohexylcarbodiimide by using 1,3-dicyclohexylurea as a starting raw material. ;SOLUTION: In the method for producing the 1,3-dicyclohexylcarbodiimide the reaction of 1,3-dicyclohexylurea with phosphorus oxychloride is carried out by adding the 1,3-dicyclohexylurea to the solution of the phosphorus oxychloride dissolved in a non-basic organic solvent so that the phosphorus oxychloride may be always present in the stoichiometrically excess amount based on the 1,3-dicyclohexylurea. Further, the middle reaction generation matter generated by the reaction of the 1,3-dicyclohexylurea and the phosphorus oxychloride is decomposed by an alkaline water solution to provide the objective 1,3- dicyclohexylcarbodiimide.;COPYRIGHT: (C)1998,JPO