Method for preparing lactames, comprising a photonitrosation step, followed by a Beckmann transposition step
AssigneeArkema France
InventorThierry Aubert
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Abstract
The invention relates to a method for preparing lactames, according to which a photonitrosation of a cycloalkane is carried out using nitrosyl chloride (NOCI). According to the invention, said photonitrosation is carried out by means of LEDs emitting a monochromatic light. The method according to the invention can also include a step comprising Beckmann transposition/dechlorination of the oxime hydrochloride generated during said phonitrosation, preferably carried out in a glass microreactor.
Claims11
In a process for preparing lauryllactam or caprolactam from oximes, comprising photonitrosating of a cycloalkane using nitrosyl chloride (NOCI), the improvement wherein said photonitrosating is carried out by exposing the cycloalkane to LEDs emitting a monochromatic light.
A process for preparing lauryllactam or caprolactam, comprising preparing an oxime by photonitrosation of a cycloalkane using nitrosyl chloride in the presence of LEDs emitting monochromatic light, and subjecting oxime hydrochloride generated during photonitrosation to Beckman rearrangement/dechlorination to produce lauryllactam or caprolactam.
Dependencies are inferred from the claim text.