Method of making organic isocyanates

Claim 1

THE METHOD OF CONTINUOUSLY PRODUCING MONO-, DI- AND POLYISOCYANATES, WHICH COMPRISES CONTINUOUSLY SUPPLYING PHOSGENE AND AN INERT ORGANIC SOLVENT SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A PRIMARY MONO-, DI- AND POLYAMINE TO A PRIMARY REACTION ZONE AND THEREIN CONTINUOUSLY REACTING SAID PHOSGENE AND SAID AMINE AT A TEMPERATURE IN THE RANGE OF ABOUT -20* C. TO ABOUT 60* C. TO PRODUCE AN INTERMEDIATE REACTION PRODUCT AND CONTINUOUSLY REACTING SAID PRODUCT WITH PHOSGENE IN A SECONDARY REACTOR AT A TEMPERATURE OF ABOUT 80* C. TO ABOUT 320* C. TO FORM THE CORRESPONDING ISOCYANATE, SAID PHOSGENE BEING EMPLOYED IN SAID PRIMARY REACTION ZONE AND SAID SECONDARY COLUMN REACTOR IN A TOTAL AMOUNT AT LEAST EQUIVALENT TO THAT THEORETICALLY REQUIRED TO CONVERT SAID PRIMARY AMINES INTO THE CORRESPONDING MONO-, DIAND POLYISOCYANATES, RESPECTIVELY.