Producing special isocyanates via co-phosgenation

Abstract

The invention relates to a method for producing isocyanates via phosgenation, in particular gas-phase phosgenation (GPP) or liquid-phase phosgenation (FPP), of the corresponding amines, wherein an amine mixture formed of at least one first amine and at least one second amine, that is different from the first amine, is reacted with phosgene to form a reaction mixture, in which, in particular, a higher yield and/or good purity (in the form of a lowering of the content of acid chlorine compounds (AC value) and/or of hydrolysable chlorine (HC value)) is achieved for the corresponding isocyanates obtained in the production process. The invention also relates to a product that is/can be obtained using the method according to the invention, preferably a product that is/can be obtained directly using the method according to the invention, as well as the use of said product and/or the isocyanate or isocyanate mixture which is/can be obtained using the method according to the invention. The invention further relates to a phosgenation system for carrying out the method according to the invention.

Dependencies are inferred from the claim text.