The Environment: From Surplus to Scarcity

In a process for the manufacture of organic isocyanates by reacting an organic halide containing at least one aliphatically bound halogen atom with an alkali metal, ammonium or alkaline earth metal cyanate, the improvement which comprises in a first stage rendering the alkali metal, ammonium or alkaline earth metal cyanate into a fine state of sub-division by milling in solvent in the presence of a finely divided inert substrate.