Method for reducing hydrolysable chlorine content in organic isocyanates, comprises contacting the isocyanate with water-containing inert gas stream/organic material with cationic exchange effect and releasing the obtained mixture

摘要

Method for reducing hydrolysable chlorine content in organic isocyanates or its mixtures comprises contacting the organic isocyante or aqueous organic isocyanate mixture or their solutions, in a first step, with a water-containing inert gas stream/an organic material having cationic-exchange effect and in the second step, gently releasing the obtained mixture from optionally existing solid.