Process for preparing caprolactam by Beckmann rearrangement

3 3 so3H2SO4cap so33 so324 capThe invention relates to a process for preparing caprolactam by Beckmann rearrangement of cyclohexanone oxime by feeding cyclohexanone oxime to a reaction mixture comprising (i) sulfuric acid (ii) SOand (iii) caprolactam , wherein the SOcontent of the reaction mixture i...

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Bibliographische Detailangaben
Hauptverfasser: Thomissen, Petrus Jozef Hubertus, Lemmens, Joannes Albertus Wilhelmus, Smeets, Theodorus Maria
Format: Patent
Sprache:eng
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Zusammenfassung:3 3 so3H2SO4cap so33 so324 capThe invention relates to a process for preparing caprolactam by Beckmann rearrangement of cyclohexanone oxime by feeding cyclohexanone oxime to a reaction mixture comprising (i) sulfuric acid (ii) SOand (iii) caprolactam , wherein the SOcontent of the reaction mixture is between 9 and 20 wt. % and the molar ratio M of the reaction mixture defined as (n+n)/nis between 1 and 1.4, wherein n=quantity of SOin reaction mixture, in mol n=quantity of HSOin reaction mixture, in mol n=quantity of caprolactam in reaction mixture, in mol.