公开(公告)号：US4017482A

公开(公告)日：1977-04-12

申请号：US603444

申请日：1975-08-11

Applicant: Rudolph Hans Gath ,  Hugo Fuchs

Inventor： Rudolph Hans Gath ,  Hugo Fuchs

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A method of simultaneously purifying crude caprolactams obtained from the Beckmann rearrangement of cyclohexanone oxime in oleum and the gas-phase rearrangement of cyclohexanone oxime in the presence of catalysts. The improvement consists in that the crude caprolactam obtained from the catalytic gas-phase rearrangement is added to the acid rearrangement mixture derived from the Beckmann rearrangement in oleum and the mixture is maintained at temperatures of from 100.degree. to 200.degree. C with thorough mixing, whereupon it is neutralized and worked up. Advantageously, the content of lactam in the catalytic gas-phase rearrangement is from 5 to 30% of the content of lactam in the acid rearrangement mixture obtained from the Beckmann rearrangement.

Abstract translation: 在催化剂存在下，同时纯化得自发酵天然气的环己酮肟贝克曼重排和环己酮肟气相重排得到的粗己内酰胺的方法。 改进之处在于将从催化气相重排获得的粗己内酰胺加入到发泡油中由Beckmann重排产生的酸重排混合物中，并将混合物通过充分混合保持在100至200℃的温度， 它被中和和处理。 有利地，催化气相重排中的内酰胺的含量为从Beckmann重排得到的酸重排混合物中的内酰胺含量的5〜30％。