Method of producing organic diisocyanates

Claim 1

THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY AMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL DIAMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON LIQUID MIXTURE, CHARACTERIZED BY HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF 0.950 AND 1.05 AT 25* C. AND OBTAINED BY THE PARTIAL CATALYTIC HYDROGENATION OF THE MIXTURE OF NORMALLY SOLID AROMATIC HYDROCARBONS BOILING ABOVE ABOUT 340* C. AT 760 MM. PRESSURE AND FORMED IN THE SYNTHESIS OF BIPHENYL BY THE PYROLYSIS OF BENZENE AT ELEVATED TEMPERATURES.

Claim 2

THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY AMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL DIAMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON LIQUID MIXTURE, CHARACTERIZED BY HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF 0.950 AND 1.05 AT 25* C. AND OBTAINED BY THE PARTIAL CATALYTIC HYDROGENATION OF THE MIXTURE OF NORMALLY SOLID AROMATIC HYDROCARBONS BOILING ABOVE ABOUT 340* C. AT 760 MM. PRESSURE AND FORMED IN THE SYNTHESIS OF BIPHENYL BY THE PYROLYSIS OF BENZENE AT ELEVATED TEMPERATURES.