Process for preparing isocyanates by phosgenation of the corresponding amines in the gas phase

摘要

A process for preparing isocyanates by phosgenation of the corresponding amines in a fluidized-bed reactor (R), wherein a gas stream (1) comprising the phosgene is used as fluidizing gas and keeps an inert solid in suspension and a liquid stream (2) comprising the amine is fed into the fluidized bed, with the amine vaporizing partially or completely and reacting with the phosgene to give a reaction gas mixture which comprises the corresponding isocyanate and is taken off from the fluidized-bed reactor (R) is proposed.

主权项

1. A process for preparing an isocyanate, the process comprising:
introducing a gas stream comprising phosgene into a fluidized-bed reactor, wherein the gas stream acts as a fluidizing gas and keeps an inert solid in suspension, feeding a liquid stream comprising an amine into the fluidized-bed reactor, vaporizing the amine partially or completely, reacting the amine with phosgene to obtain a reaction gas mixture comprising the isocyanate, and taking the reaction gas mixture from the fluidized-bed reactor.