Patent ID: 8669394

Claim:
A method for decomposing an isocyanate compound, which comprises: continuously mixing and dispersing into water at high pressure and high temperature an isocyanate compound having at least one isocyanate group or group derived from an isocyanate group in a molten state or solution state, thereby forming a liquid mixture; wherein the high temperature is from 190 to 370° C. and the high pressure is from 3 to 30 MPa supplying said liquid mixture comprising the isocyanate compound and the water at high pressure and high temperature continuously to a reactor, wherein the liquid mixture comprising the isocyanate compound and the water at high pressure and high temperature is ascended as a swirling flow in the reactor, followed by subjecting the isocyanate compound to a decomposition reaction in the reactor; and recovering a raw material for the isocyanate compound or a derivative thereof.