Recycling catalyst in preparation of dimethylformamide from dimethylamine and carbon monoxide
AssigneeE. I. Du Pont de Nemours and Company
InventorHarold E. Bellis
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Abstract
The alkali metal methylate catalyst used in the preparation of dimethylformamide from dimethylamine and carbon monoxide can be preserved, recycled and reused if the reaction mass contains dimethylamine in excess of the stoichiometric amount at all times.
Claims1
In the catalytic preparation of dimethylformamide from dimethylamine and carbon monoxide using an alkali metal methylate as the catalyst, the improvement which permits recycling and reuse of the catalyst, which improvement comprises the continuous presence of dimethylamine in the reaction mass at a concentration of at least 0.1%, by weight, in excess of the stoichiometric amount.
Dependencies are inferred from the claim text.