A PROCESS FOR QUENCHING A GASEOUS REACTION MIXTURE DURING THE GAS PHASE PHOSGENATION OF DIAMINES

摘要

The present invention provides a process for quenching a gaseous reaction mixture during the phosgenation of diamines in the gas phase to produce diisocyanate s. The gaseous reaction mixture contains at least a diisocyanate, phosgene a nd hydrogen chloride. The quenching liquid is injected into the gas mixture continuously flowing out of a cylindrical reaction zone into the downstream cylindrical quenching zone with the aid of at least two spray nozzles which are arranged at the entrance to the quenching zone at equal distances along the circumference of the quenching zone.