Lactams prodn - by beckmann rearrangement with phosphoric acid
In a process for producing lactams by reacting cycloaliphatic ketones with hydroxylamine phosphate and subjecting the oxime to Beckmann rearrangement with phosphoric acid, the rearrangement mixture is diluted with water, lactam is extracted with a water- and acid-immiscible solvent, and the resultin...
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| Zusammenfassung: | In a process for producing lactams by reacting cycloaliphatic ketones with hydroxylamine phosphate and subjecting the oxime to Beckmann rearrangement with phosphoric acid, the rearrangement mixture is diluted with water, lactam is extracted with a water- and acid-immiscible solvent, and the resulting dil. phosphoric acid is recycled, partly to (a) the prodn of hydroxylamine phosphate by catalytic redn. of NO in phosphoric acid soln. and partly, after dewatering and dehydration, to (b) the rearrangement step. |
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