Process for producing alkali metal cyanates
AssigneeFMC Corporation
InventorsWilliam B. Dodge, Marc Halfon
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Abstract
An alkali metal cyanate is prepared by heating a heterogeneous mixture of urea and an alkali metal carbonate in a solvent which selectively dissolves urea, but not the alkali metal carbonate.
Claims3
A process for making an alkyl isocyanate which comprises (1) first heating urea with a stoichiometric excess of alkali metal carbonate in the temperature range 130.degree.-180.degree. C. in a solvent which selectively dissolves the urea but not the alkali metal carbonate and is selected from the group consisting of 1,2-dichlorobenzene, benzonitrile, 2-phenylbutane and mesitylene and then (2) reacting the alkali metal cyanate produced thereby, without recovery or purification, in situ with a dialkylsulfate, thereby yielding the desired alkyl isocyanate.
Dependencies are inferred from the claim text.