Process of preparing isocyanates

Claim 1

THE PROCESS FOR PREPARING AN ORGANIC ISOCYANATE WHICH HAS A NORMAL BOILING POINT ABOVE 90*C. AND A MELTING POINT BELOW 200*C. UNDER ATMOSPHERIC PRESSURE AND IN WHICH THE ORGANIC RADICAL IS A MEMBER OF THE CLASS CONSISTING OF ALIPHATIC HYDROCARBON RADICALS, CYCLOALIPHATIC HYDROCARBON RADICALS, AROMATIC HYDROCARBON RADICALS AND SUBSTITUTED AROMATIC RADICALS IN WHICH THE SUBSTITUTED GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF HALOGEN, NITRO, ALKOXY AND CYANO GROUPS, WHICH PROCESS CONSISTS ESSENTIALLY OF ADDING A 25% TO ABOUT 100% MOLAR EXCESS OF PHOSGENE TO A SOLUTION OF ABOUT 10% TO ABOUT 35% BY WEIGHT OF THE CORRESPONDING ORGANIC PRIMARY AMINE IN AN INERT, ORGANIC, LIQUID SOLVENT AT A TEMPERATURE BETWEEN ABOUT -25*C. AND 85*C., AND GRADUALLY ADDING THE RESULTING MIXTURE TO A BODY OF SAID ISOCYANATE HELD AT A TEMPERATURE WITHIN THE RANGE OF 90*C. TO ABOUT 200*C. AT WHICH THE ISOCYANATE IS A STABLE LIQUID AND UNDER ABOUT ATMOSPHERIC PRESSURE AT A RATE SUCH THAT THE SOLVENT ABOUT ATMOSPHERIC PRESSURE AT A TURE AS FAST AS IT IS ADDED TO SAID BODY OF ISOCYANATE, THE SOLVENT HAVING A BOILING POINT AT LEAST 15*C. BELOW THE TEMPERATUREE OF THE BODY OF ISOCYANATE.