Process for preparing caprolactam by beckmann rearrangement

The 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) S03 and (iii) caprolactam, wherein the S03 content of the reaction mixture is between 9 and 20 wt. % an...

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Bibliographische Detailangaben
Hauptverfasser:	THOMISSEN PETRUS JOZEF H, SMEETS THEODORUS M, LEMMENS JOANNES ALBERTUS W
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The 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) S03 and (iii) caprolactam, wherein the S03 content of the reaction mixture is between 9 and 20 wt. % and the molar ratio M of the reaction mixture defined as (nSO3+nH2SO4)/ncap is between 1 and 1.4, wherein nSO3=quantity of SO3 in reaction mixture, in mol nH2SO4=quantity of H2SO4 in reaction mixture, in mol ncap=quantity of caprolactam in reaction mixture, in mol.