Patent ID: 8686182

Claim:
A process for preparing an isocyanate, a polyisocyanate, or both an isocyanate and a polyisocyanate by reacting a corresponding amine with phosgene, optionally in the presence of an inert medium, in a reactor, a first reactant stream comprising the amine being supplied to the reactor in liquid form, and a second reactant stream comprising the phosgene being supplied to the reactor in gaseous form, wherein the reactor is a centrifugal reactor having a packing which rotates about a central axis in a housing, the first reactant stream and the second reactant stream being supplied to the rotating packing such that the reactant streams are mixed due to the centrifugal force in the rotating packing and are transported outward, the mixing in the rotating packing resulting in reaction of the phosgene with the amine to give the corresponding isocyanate, polyisocyanate or both isocyanate and polyisocyanate.