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AssigneeAir Products and Chemicals, Inc.
InventorsRobin Joyce Maliszewskyj, Michael Gerard Turcotte, John William Mitchell
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A continuous process for the production of dimethylformamide comprising the steps: (a) reacting methyl formate and dimethylamine in a reactive distillation column under conditions to form dimethylformamide and by-product methanol; (b) vaporizing the by-product methanol and generating a liquid dimethylformamide while in said reactive distillation column; (c) removing at least a major portion of the by-product methanol as an overhead from said reactive distillation column; (d) removing a crude liquid dimethylformamide containing residual by-product methanol as a bottoms fraction from said reactive distillation column; (e) introducing said bottoms fraction containing dimethylformamide and residual by-product methanol to a purification column wherein the by-product methanol is removed from said dimethylformamide as an overhead and purified dimethylformamide is removed as a bottoms fraction; and, optionally, (f) recycling the by-product methanol removed as an overhead from the purification column to the reactive distillation column.
In a continuous process for the production of dimethylformamide which comprises reacting methyl formate and dimethylamine at a temperature and pressure sufficient to form dimethylformamide, the improvement which comprises the steps:
In a continuous process for the production of dimethylformamide which comprises reacting methyl formate and dimethylamine at a temperature and pressure sufficient to form dimethylformamide, the improvement which comprises the steps:
Dependencies are inferred from the claim text.