Dmf distillation

A method of producing purified dimethylformamide from a feed mixture comprising dimethylformamide and hydrogen chloride, comprising:

• distilling the feed mixture to afford a more volatile fraction and a less volatile fraction, wherein the more volatile fraction is lower in hydrogen chloride, measured as chloride, than the less volatile fraction, and
• collecting the more volatile fraction to afford a collected more volatile fraction, at least a portion of which affords a purified dimethylformamide product that is lower in hydrogen chloride, measured as chloride, than the feed mixture;
• wherein the hydrogen chloride content of the feed mixture, measured as chloride, is from 0.1% to 10% (w/w) and the hydrogen chloride content of the purified dimethylformamide, measured as chloride, is from 0 to 1000 ppm.