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US 3,937,727 AGranted
Process for preparing N, N-dimethylurea
AssigneeAshland Oil, Inc.
InventorsPeter E. Throckmorton, Sari Frey, Dace Grote
Life of this patent
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Abstract
Urea is reacted with at least a onefold molar excess of dimethylamine in a substantially anhydrous system under pressure and temperature conditions adapted to produce unsymmetrical dimethylurea in essentially quantitative yields.
Claims6
A process for the preparation of N, N-dimethylurea which comprises reacting dimethylamine and urea neat in a molar ratio of not less than 2:1, respectively, under autogenous pressure and substantially anhydrous conditions at a temperature of from 110.degree. to 150.degree. C.
Dependencies are inferred from the claim text.