Process for the manufacture of substituted ureas

Claim 1

A PROCESS FOR THE PRODUCTION OF UNSYMMETRICALLY SUBSTITUTED UREAS WHICH COMPRISES MAINTAINING A MIXTURE OF UREA AND A PRIMARY CYCLIC HYDROCARBON AMINE WHEREIN THE CYCLIC HYDROCARBON RADICAL OF SAID AMINE IS SELECTED FROM THE GROUP CONSISTING OF PHENYL, ALKYL-PHENYL, ARAKYLPHENYL, DI-PHENYL, CYCLOHEXYL, ALKYL-CYCLOHEXY, AND THEIR HALOGEN SUBSTITUTION PRODUCTS FOR A SUFFICIENT LENGTH OF TIME TO PRODUCE SYMMETRICALLY SUBSTITUTED CYCLIC HYDROCARBON UREA AT A TEMPERATURE BETWEEN ABOVE ABOUT 100* C. AND BELOW THE TEMPERATURE AT WHICH SUBSTANTIAL DECOMPOSITION OF THE SYMMETRICALLY SUBSTITUTED HYDROCARBON UREA OCCURS; ADMIXING AN ALKYL AMINE HAVING HYDROGEN AND AT LEAST 1 AND NOT MORE THANT 2 ALKYL RADICALS ATTACHED TO THE NITROGEN OF SAID AMINE AND EACH SAID ALKYL RADICAL HAVING NO MORE THAN 6 CARBON ATOMS WITH THE SYMMETRICALLY SUBSTITUTED CYCLIC HYDROCARBON UREA; MAINTAINING THE MIXTURE FOR A SUFFICIENT LENGTH OF TIME TO EFFECT CONVERSION OF THE SYMMETRICALLY SUBSTITUTED CYCLIC HYDROCARBON UREA TO AN UNSYMMETRICALLY SUBSTITUTED UREA HAVING A CYCLIC HYDROCARBON RADICAL ATTACHED TO ONE NITROGEN AND AT LEAST ONE ALKYL RADICAL ATTACHED TO THE OTHER NITROGEN OF THE UREA AT A TEMPERATURE BETWEEN ABOVE ABOUT 150* C. AND BELOW TEMPERATURE BETWEEN ABOVE TIAL DECOMPOSITION OF THE UNSYMMETRICALLY SUBSTITUTED UREA OCCURS AND RECOVERING SAID UNSYMMETRICALLY SUBSTITUTED UREA.