Process for preparing isocyanates

摘要

The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of an inert medium, in which the amine and the phosgene are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride and leaves the reactor is cooled in a quench space of a quench by adding a quench medium. The quench medium on addition to the quench space has a temperature above the condensation temperature or the desublimation temperature of the reaction gas.

主权项

1. A process for preparing at least one isocyanate comprising:
mixing at least one amine and phosgene and converting the at least one amine and the phosgene to the isocyanate in a reactor, wherein a reaction gas which comprises isocyanate and hydrogen chloride leaves the reactor and is cooled in a quench space of a quench by adding a quench medium, and wherein the quench medium on addition to the quench space has a temperature above a condensation temperature or desublimation temperature of the reaction gas.