Verfahren und Mischaggregat zur Herstellung von Isocyanaten durch Phosgenierung primärer Amine

摘要

In a rotor-stator mixer comprising a rotationally symmetrical housing (1) with a frontal plate (23) and a mixing chamber (2) having separate material inlets and an outlet (13), where an inlet (5) for first material is in the chamber rotational axis (23) and an inlet for second material consists of openings (7) in the frontal plate, the plate includes channels directed outwardly from the first material inlet in the rotational axis. A rotor-stator type mixer comprises a rotationally symmetrical housing (1), limited at the front by a frontal plate (23) and containing a mixing chamber (2) with separate inlets for at least two materials and an outlet (13). The inlet (5) for a first material is in the rotational axis (23) of the chamber and the inlet for a second material consists of openings (7) in the frontal plate, located rotationally symmetrically relative to the axis and each containing an axially movable bolt (15). The novel feature is that the frontal plate includes channels directed outwardly from the first material inlet in the rotational axis. An independent claim is included for the production of isocyanates by phosgenation of primary amines, by mixing and reacting the amine and phosgene in a reactor as above.